initial commit

.gitignore

@@ -0,0 +1 @@
+.DS_Store
.dart_tool/

.packages
.pub/

build/

.idea/
*.iml

.metadata

@@ -0,0 +1,10 @@
+# This file tracks properties of this Flutter project.
+# Used by Flutter tool to assess capabilities and perform upgrades etc.
+#
+# This file should be version controlled and should not be manually edited.
+
+version:
+  revision: 8af6b2f038c1172e61d418869363a28dffec3cb4
+  channel: stable
+
+project_type: plugin

CHANGELOG.md

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+## 0.1.0
+
+Initial release.

LICENSE

@@ -0,0 +1,29 @@
+BSD 3-Clause License
+
+Copyright (c) 2020, Wenqi Li
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:
+
+1. Redistributions of source code must retain the above copyright notice, this
+   list of conditions and the following disclaimer.
+
+2. Redistributions in binary form must reproduce the above copyright notice,
+   this list of conditions and the following disclaimer in the documentation
+   and/or other materials provided with the distribution.
+
+3. Neither the name of the copyright holder nor the names of its
+   contributors may be used to endorse or promote products derived from
+   this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

README.md

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+# Photo Gallery
+
+A Flutter plugin that retrieves images and videos from mobile native gallery.
+
+## Installation
+
+First, add photo_gallery as a [dependency in your pubspec.yaml file](https://flutter.dev/docs/development/packages-and-plugins/using-packages).
+
+#### iOS
+Add the following keys to your *Info.plist* file, located in ```<project root>/ios/Runner/Info.plist```:
+
+```NSPhotoLibraryUsageDescription``` - describe why your app needs permission for the photo library. This is called *Privacy - Photo Library Usage Description* in the visual editor.
+
+```xml
+<key>NSPhotoLibraryUsageDescription</key>
+<string>Example usage description</string>
+```
+
+#### Android
+Add the following permissions to your *AndroidManifest.xml*, located in ```<project root>/android/app/src/main/AndroidManifest.xml```:
+
+```xml
+<manifest ...>
+    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
+    <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
+    ...
+<manifest/>
+```
+
+API 29+
+
+Add the following property to your *AndroidManifest.xml*, located in ```<project root>/android/app/src/main/AndroidManifest.xml``` to [opt-out of scoped storage](https://developer.android.com/training/data-storage/use-cases#opt-out-scoped-storage):
+```xml
+<manifest ...>
+    ...
+    <application
+        android:requestLegacyExternalStorage="true"
+        ...>
+    <application/>
+<manifest/>
+```
+
+## Usage
+
+* Listing albums in the gallery
+```dart
+final List<Album> imageAlbums = await PhotoGallery.listAlbums(
+    mediumType: mediumType.image,
+);
+final List<Album> videoAlbums = await PhotoGallery.listAlbums(
+    mediumType: mediumType.video,
+);
+```
+* Listing media in an album
+```dart
+final MediaPage imagePage = await imageAlbum.listMedia(
+    skip: 5,
+    take: 10,
+);
+final MediaPage videoPage = await videoAlbum.listMedia(
+    skip: 5,
+    take: 10,
+);
+final List<Medium> allMedia = [
+    ...imagePage.items,
+    ...videoPage.items,
+];
+```
+* Loading more media in a album
+```dart
+if (!imagePage.isLast) {
+    final nextImagePage = await imagePage.nextPage();
+    // ...
+}
+```
+* Getting a file
+```dart
+final File file = await medium.getFile();
+```
+```dart
+final File file = await PhotoGallery.getFile(mediumId: mediumId);
+```
+* Getting thumbnail data
+```dart
+final List<int> data = await medium.getThumbnail();
+```
+```dart
+final List<int> data = await PhotoGallery.getThumbnail(mediumId: mediumId);
+```
+You can also specify thumbnail width and height on Android API 21 or higher; You can also specify thumbnail width, height and whether provider high quality or not on iOS:
+```dart
+final List<int> data = await medium.getThumbnail(
+    width: 128,
+    height: 128,
+    highQuality: true,
+);
+```
+```dart
+final List<int> data = await PhotoGallery.getThumbnail(
+    mediumId: mediumId,
+    width: 128,
+    height: 128,
+    highQuality: true,
+);
+```
+* Getting album thumbnail data
+```dart
+final List<int> data = await album.getThumbnail();
+```
+```dart
+final List<int> data = await PhotoGallery.getAlbumThumbnail(albumId: albumId);
+```
+You can also specify thumbnail width and height on Android API 21 or higher; You can also specify thumbnail width, height and whether provider high quality or not on iOS:
+```dart
+final List<int> data = await album.getThumbnail(
+    width: 128,
+    height: 128,
+    highQuality: true,
+);
+```
+```dart
+final List<int> data = await PhotoGallery.getAlbumThumbnail(
+    albumId: albumId,
+    width: 128,
+    height: 128,
+    highQuality: true,
+);
+```
+* Displaying medium thumbnail
+
+ThumbnailProvider are available to display thumbnail images (here with the help of dependency [transparent_image](https://pub.dev/packages/transparent_image)):
+
+```dart
+FadeInImage(
+    fit: BoxFit.cover,
+    placeholder: MemoryImage(kTransparentImage),
+    image: ThumbnailProvider(
+        mediumId: mediumId,
+        width: 128,
+        height: 128,
+        hightQuality: true,
+    ),
+)
+```
+Width and height is only available on Android API 29+ or iOS platform
+* Displaying album thumbnail
+
+AlbumThumbnailProvider are available to display album thumbnail images (here with the help of dependency [transparent_image](https://pub.dev/packages/transparent_image)):
+```dart
+FadeInImage(
+    fit: BoxFit.cover,
+    placeholder: MemoryImage(kTransparentImage),
+    image: AlbumThumbnailProvider(
+        albumId: albumId,
+        width: 128,
+        height: 128,
+        hightQuality: true,
+    ),
+)
+```
+Width and height is only available on Android API 21+ or iOS platform
+* Displaying a full size image
+
+You can use PhotoProvider to display the full size image (here with the help of dependency [transparent_image](https://pub.dev/packages/transparent_image)):
+
+```dart
+FadeInImage(
+    fit: BoxFit.cover,
+    placeholder: MemoryImage(kTransparentImage),
+    image: PhotoProvider(
+        mediumId: mediumId,
+    ),
+)
+```

android/.gitignore

@@ -0,0 +1,8 @@
+*.iml
+.gradle
+/local.properties
+/.idea/workspace.xml
+/.idea/libraries
+.DS_Store
+/build
+/captures

android/build.gradle

@@ -0,0 +1,43 @@
+group 'com.morbit.photogallery'
+version '1.0-SNAPSHOT'
+
+buildscript {
+    ext.kotlin_version = '1.3.72'
+    repositories {
+        google()
+        jcenter()
+    }
+
+    dependencies {
+        classpath 'com.android.tools.build:gradle:3.5.0'
+        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
+    }
+}
+
+rootProject.allprojects {
+    repositories {
+        google()
+        jcenter()
+    }
+}
+
+apply plugin: 'com.android.library'
+apply plugin: 'kotlin-android'
+
+android {
+    compileSdkVersion 29
+
+    sourceSets {
+        main.java.srcDirs += 'src/main/kotlin'
+    }
+    defaultConfig {
+        minSdkVersion 16
+    }
+    lintOptions {
+        disable 'InvalidPackage'
+    }
+}
+
+dependencies {
+    implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
+}

android/gradle.properties

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+org.gradle.jvmargs=-Xmx1536M
+android.enableR8=true
+android.useAndroidX=true
+android.enableJetifier=true

android/gradle/wrapper/gradle-wrapper.properties

@@ -0,0 +1,5 @@
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-5.6.2-all.zip

android/gradlew

@@ -0,0 +1,160 @@
+#!/usr/bin/env bash
+
+##############################################################################
+##
+##  Gradle start up script for UN*X
+##
+##############################################################################
+
+# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+DEFAULT_JVM_OPTS=""
+
+APP_NAME="Gradle"
+APP_BASE_NAME=`basename "$0"`
+
+# Use the maximum available, or set MAX_FD != -1 to use that value.
+MAX_FD="maximum"
+
+warn ( ) {
+    echo "$*"
+}
+
+die ( ) {
+    echo
+    echo "$*"
+    echo
+    exit 1
+}
+
+# OS specific support (must be 'true' or 'false').
+cygwin=false
+msys=false
+darwin=false
+case "`uname`" in
+  CYGWIN* )
+    cygwin=true
+    ;;
+  Darwin* )
+    darwin=true
+    ;;
+  MINGW* )
+    msys=true
+    ;;
+esac
+
+# Attempt to set APP_HOME
+# Resolve links: $0 may be a link
+PRG="$0"
+# Need this for relative symlinks.
+while [ -h "$PRG" ] ; do
+    ls=`ls -ld "$PRG"`
+    link=`expr "$ls" : '.*-> \(.*\)$'`
+    if expr "$link" : '/.*' > /dev/null; then
+        PRG="$link"
+    else
+        PRG=`dirname "$PRG"`"/$link"
+    fi
+done
+SAVED="`pwd`"
+cd "`dirname \"$PRG\"`/" >/dev/null
+APP_HOME="`pwd -P`"
+cd "$SAVED" >/dev/null
+
+CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
+
+# Determine the Java command to use to start the JVM.
+if [ -n "$JAVA_HOME" ] ; then
+    if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
+        # IBM's JDK on AIX uses strange locations for the executables
+        JAVACMD="$JAVA_HOME/jre/sh/java"
+    else
+        JAVACMD="$JAVA_HOME/bin/java"
+    fi
+    if [ ! -x "$JAVACMD" ] ; then
+        die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+else
+    JAVACMD="java"
+    which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+fi
+
+# Increase the maximum file descriptors if we can.
+if [ "$cygwin" = "false" -a "$darwin" = "false" ] ; then
+    MAX_FD_LIMIT=`ulimit -H -n`
+    if [ $? -eq 0 ] ; then
+        if [ "$MAX_FD" = "maximum" -o "$MAX_FD" = "max" ] ; then
+            MAX_FD="$MAX_FD_LIMIT"
+        fi
+        ulimit -n $MAX_FD
+        if [ $? -ne 0 ] ; then
+            warn "Could not set maximum file descriptor limit: $MAX_FD"
+        fi
+    else
+        warn "Could not query maximum file descriptor limit: $MAX_FD_LIMIT"
+    fi
+fi
+
+# For Darwin, add options to specify how the application appears in the dock
+if $darwin; then
+    GRADLE_OPTS="$GRADLE_OPTS \"-Xdock:name=$APP_NAME\" \"-Xdock:icon=$APP_HOME/media/gradle.icns\""
+fi
+
+# For Cygwin, switch paths to Windows format before running java
+if $cygwin ; then
+    APP_HOME=`cygpath --path --mixed "$APP_HOME"`
+    CLASSPATH=`cygpath --path --mixed "$CLASSPATH"`
+    JAVACMD=`cygpath --unix "$JAVACMD"`
+
+    # We build the pattern for arguments to be converted via cygpath
+    ROOTDIRSRAW=`find -L / -maxdepth 1 -mindepth 1 -type d 2>/dev/null`
+    SEP=""
+    for dir in $ROOTDIRSRAW ; do
+        ROOTDIRS="$ROOTDIRS$SEP$dir"
+        SEP="|"
+    done
+    OURCYGPATTERN="(^($ROOTDIRS))"
+    # Add a user-defined pattern to the cygpath arguments
+    if [ "$GRADLE_CYGPATTERN" != "" ] ; then
+        OURCYGPATTERN="$OURCYGPATTERN|($GRADLE_CYGPATTERN)"
+    fi
+    # Now convert the arguments - kludge to limit ourselves to /bin/sh
+    i=0
+    for arg in "$@" ; do
+        CHECK=`echo "$arg"|egrep -c "$OURCYGPATTERN" -`
+        CHECK2=`echo "$arg"|egrep -c "^-"`                                 ### Determine if an option
+
+        if [ $CHECK -ne 0 ] && [ $CHECK2 -eq 0 ] ; then                    ### Added a condition
+            eval `echo args$i`=`cygpath --path --ignore --mixed "$arg"`
+        else
+            eval `echo args$i`="\"$arg\""
+        fi
+        i=$((i+1))
+    done
+    case $i in
+        (0) set -- ;;
+        (1) set -- "$args0" ;;
+        (2) set -- "$args0" "$args1" ;;
+        (3) set -- "$args0" "$args1" "$args2" ;;
+        (4) set -- "$args0" "$args1" "$args2" "$args3" ;;
+        (5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;;
+        (6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;;
+        (7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;;
+        (8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;;
+        (9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;;
+    esac
+fi
+
+# Split up the JVM_OPTS And GRADLE_OPTS values into an array, following the shell quoting and substitution rules
+function splitJvmOpts() {
+    JVM_OPTS=("$@")
+}
+eval splitJvmOpts $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS
+JVM_OPTS[${#JVM_OPTS[*]}]="-Dorg.gradle.appname=$APP_BASE_NAME"
+
+exec "$JAVACMD" "${JVM_OPTS[@]}" -classpath "$CLASSPATH" org.gradle.wrapper.GradleWrapperMain "$@"

android/gradlew.bat

@@ -0,0 +1,90 @@
+@if "%DEBUG%" == "" @echo off
+@rem ##########################################################################
+@rem
+@rem  Gradle startup script for Windows
+@rem
+@rem ##########################################################################
+
+@rem Set local scope for the variables with windows NT shell
+if "%OS%"=="Windows_NT" setlocal
+
+@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+set DEFAULT_JVM_OPTS=
+
+set DIRNAME=%~dp0
+if "%DIRNAME%" == "" set DIRNAME=.
+set APP_BASE_NAME=%~n0
+set APP_HOME=%DIRNAME%
+
+@rem Find java.exe
+if defined JAVA_HOME goto findJavaFromJavaHome
+
+set JAVA_EXE=java.exe
+%JAVA_EXE% -version >NUL 2>&1
+if "%ERRORLEVEL%" == "0" goto init
+
+echo.
+echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:findJavaFromJavaHome
+set JAVA_HOME=%JAVA_HOME:"=%
+set JAVA_EXE=%JAVA_HOME%/bin/java.exe
+
+if exist "%JAVA_EXE%" goto init
+
+echo.
+echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME%
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:init
+@rem Get command-line arguments, handling Windowz variants
+
+if not "%OS%" == "Windows_NT" goto win9xME_args
+if "%@eval[2+2]" == "4" goto 4NT_args
+
+:win9xME_args
+@rem Slurp the command line arguments.
+set CMD_LINE_ARGS=
+set _SKIP=2
+
+:win9xME_args_slurp
+if "x%~1" == "x" goto execute
+
+set CMD_LINE_ARGS=%*
+goto execute
+
+:4NT_args
+@rem Get arguments from the 4NT Shell from JP Software
+set CMD_LINE_ARGS=%$
+
+:execute
+@rem Setup the command line
+
+set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
+
+@rem Execute Gradle
+"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %CMD_LINE_ARGS%
+
+:end
+@rem End local scope for the variables with windows NT shell
+if "%ERRORLEVEL%"=="0" goto mainEnd
+
+:fail
+rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
+rem the _cmd.exe /c_ return code!
+if  not "" == "%GRADLE_EXIT_CONSOLE%" exit 1
+exit /b 1
+
+:mainEnd
+if "%OS%"=="Windows_NT" endlocal
+
+:omega

android/settings.gradle

@@ -0,0 +1 @@
+rootProject.name = 'photo_gallery'

android/src/main/AndroidManifest.xml

@@ -0,0 +1 @@
+<manifest package="com.morbit.photogallery"></manifest>

android/src/main/kotlin/com/morbit/photogallery/PhotoGalleryPlugin.kt

@@ -0,0 +1,623 @@
+package com.morbit.photogallery
+
+import android.content.ContentUris
+import androidx.annotation.NonNull
+import io.flutter.embedding.engine.plugins.FlutterPlugin
+import io.flutter.plugin.common.MethodCall
+import io.flutter.plugin.common.MethodChannel
+import io.flutter.plugin.common.MethodChannel.MethodCallHandler
+import io.flutter.plugin.common.MethodChannel.Result
+import io.flutter.plugin.common.PluginRegistry.Registrar
+import android.graphics.Bitmap
+import java.io.ByteArrayOutputStream
+import android.provider.MediaStore
+import android.content.Context
+import android.database.Cursor
+import android.database.Cursor.FIELD_TYPE_INTEGER
+import android.os.AsyncTask
+import android.os.Build
+import android.util.Size
+
+/** PhotoGalleryPlugin */
+class PhotoGalleryPlugin : FlutterPlugin, MethodCallHandler {
+    override fun onAttachedToEngine(@NonNull flutterPluginBinding: FlutterPlugin.FlutterPluginBinding) {
+        val channel = MethodChannel(flutterPluginBinding.binaryMessenger, "photo_gallery")
+        val plugin = PhotoGalleryPlugin()
+        plugin.context = flutterPluginBinding.applicationContext
+        channel.setMethodCallHandler(plugin)
+    }
+
+    companion object {
+        // This static function is optional and equivalent to onAttachedToEngine. It supports the old
+        // pre-Flutter-1.12 Android projects. You are encouraged to continue supporting
+        // plugin registration via this function while apps migrate to use the new Android APIs
+        // post-flutter-1.12 via https://flutter.dev/go/android-project-migration.
+        //
+        // It is encouraged to share logic between onAttachedToEngine and registerWith to keep
+        // them functionally equivalent. Only one of onAttachedToEngine or registerWith will be called
+        // depending on the user's project. onAttachedToEngine or registerWith must both be defined
+        // in the same class.
+        @JvmStatic
+        fun registerWith(registrar: Registrar) {
+            val channel = MethodChannel(registrar.messenger(), "photo_gallery")
+            val plugin = PhotoGalleryPlugin()
+            plugin.context = registrar.activeContext()
+            channel.setMethodCallHandler(plugin)
+        }
+
+        const val imageType = "image"
+        const val videoType = "video"
+
+        const val allAlbumId = "__ALL__"
+        const val allAlbumName = "All"
+
+        val imageMetadataProjection = arrayOf(
+            MediaStore.Images.Media._ID,
+            MediaStore.Images.Media.WIDTH,
+            MediaStore.Images.Media.HEIGHT,
+            MediaStore.Images.Media.DATE_TAKEN,
+            MediaStore.Images.Media.DATE_MODIFIED
+        )
+
+        val videoMetadataProjection = arrayOf(
+            MediaStore.Video.Media._ID,
+            MediaStore.Video.Media.WIDTH,
+            MediaStore.Video.Media.HEIGHT,
+            MediaStore.Video.Media.DATE_TAKEN,
+            MediaStore.Video.Media.DATE_MODIFIED
+        )
+
+        const val imageOrderBy = "${MediaStore.Images.Media.DATE_TAKEN} DESC, ${MediaStore.Images.Media.DATE_MODIFIED} DESC"
+        const val videoOrderBy = "${MediaStore.Video.Media.DATE_TAKEN} DESC, ${MediaStore.Video.Media.DATE_MODIFIED} DESC"
+    }
+
+    private var context: Context? = null
+
+    override fun onMethodCall(@NonNull call: MethodCall, @NonNull result: Result) {
+        when (call.method) {
+            "listAlbums" -> {
+                val mediumType = call.argument<String>("mediumType")
+                BackgroundAsyncTask({
+                    listAlbums(mediumType!!)
+                }, { v ->
+                    result.success(v)
+                })
+            }
+            "listMedia" -> {
+                val albumId = call.argument<String>("albumId")
+                val mediumType = call.argument<String>("mediumType")
+                val total = call.argument<Int>("total")
+                val skip = call.argument<Int>("skip")
+                val take = call.argument<Int>("take")
+                BackgroundAsyncTask({
+                    when (mediumType) {
+                        imageType -> listImages(albumId!!, total!!, skip, take)
+                        videoType -> listVideos(albumId!!, total!!, skip, take)
+                        else -> null
+                    }
+                }, { v ->
+                    result.success(v)
+                })
+            }
+            "getMedium" -> {
+                val mediumId = call.argument<String>("mediumId")
+                val mediumType = call.argument<String>("mediumType")
+                BackgroundAsyncTask({
+                    getMedium(mediumId!!, mediumType)
+                }, { v ->
+                    result.success(v)
+                })
+            }
+            "getThumbnail" -> {
+                val mediumId = call.argument<String>("mediumId")
+                val mediumType = call.argument<String>("mediumType")
+                val width = call.argument<Int>("width")
+                val height = call.argument<Int>("height")
+                BackgroundAsyncTask({
+                    getThumbnail(mediumId!!, mediumType, width, height)
+                }, { v ->
+                    result.success(v)
+                })
+            }
+            "getAlbumThumbnail" -> {
+                val albumId = call.argument<String>("albumId")
+                val width = call.argument<Int>("width")
+                val height = call.argument<Int>("height")
+                BackgroundAsyncTask({
+                    getAlbumThumbnail(albumId!!, width, height)
+                }, { v ->
+                    result.success(v)
+                })
+            }
+            "getFile" -> {
+                val mediumId = call.argument<String>("mediumId")
+                val mediumType = call.argument<String>("mediumType")
+                BackgroundAsyncTask({
+                    getFile(mediumId!!, mediumType)
+                }, { v ->
+                    result.success(v)
+                })
+            }
+            else -> result.notImplemented()
+        }
+    }
+
+    override fun onDetachedFromEngine(@NonNull binding: FlutterPlugin.FlutterPluginBinding) {
+
+    }
+
+    private fun listAlbums(mediumType: String): List<Map<String, Any>> {
+        return when (mediumType) {
+            imageType -> {
+                listImageAlbums()
+            }
+            videoType -> {
+                listVideoAlbums()
+            }
+            else -> {
+                listOf()
+            }
+        }
+    }
+
+    private fun listImageAlbums(): List<Map<String, Any>> {
+        this.context?.run {
+            var total = 0
+            val albumHashMap = mutableMapOf<String, MutableMap<String, Any>>()
+
+            val imageProjection = arrayOf(
+                MediaStore.Images.Media.BUCKET_DISPLAY_NAME,
+                MediaStore.Images.Media.BUCKET_ID
+            )
+
+            val imageCursor = this.contentResolver.query(
+                MediaStore.Images.Media.EXTERNAL_CONTENT_URI,
+                imageProjection,
+                null,
+                null,
+                null
+            )
+
+            imageCursor?.use { cursor ->
+                val bucketColumn = cursor.getColumnIndex(MediaStore.Images.Media.BUCKET_DISPLAY_NAME)
+                val bucketColumnId = cursor.getColumnIndex(MediaStore.Images.Media.BUCKET_ID)
+
+                while (cursor.moveToNext()) {
+                    val bucketId = cursor.getString(bucketColumnId)
+                    val album = albumHashMap[bucketId]
+                    if (album == null) {
+                        val folderName = cursor.getString(bucketColumn)
+                        albumHashMap[bucketId] = mutableMapOf(
+                            "id" to bucketId,
+                            "mediumType" to imageType,
+                            "name" to folderName,
+                            "count" to 1
+                        )
+                    } else {
+                        val count = album["count"] as Int
+                        album["count"] = count + 1
+                    }
+                    total++
+                }
+            }
+
+            val albumList = mutableListOf<Map<String, Any>>()
+            albumList.add(
+                mapOf(
+                    "id" to allAlbumId,
+                    "mediumType" to imageType,
+                    "name" to allAlbumName,
+                    "count" to total
+                )
+            )
+            albumList.addAll(albumHashMap.values)
+            return albumList
+        }
+        return listOf()
+    }
+
+    private fun listVideoAlbums(): List<Map<String, Any>> {
+        this.context?.run {
+            var total = 0
+            val albumHashMap = mutableMapOf<String, MutableMap<String, Any>>()
+
+            val videoProjection = arrayOf(
+                MediaStore.Video.Media.BUCKET_DISPLAY_NAME,
+                MediaStore.Video.Media.BUCKET_ID
+            )
+
+            val videoCursor = this.contentResolver.query(
+                MediaStore.Video.Media.EXTERNAL_CONTENT_URI,
+                videoProjection,
+                null,
+                null,
+                null
+            )
+
+            videoCursor?.use { cursor ->
+                val bucketColumn = cursor.getColumnIndex(MediaStore.Video.Media.BUCKET_DISPLAY_NAME)
+                val bucketColumnId = cursor.getColumnIndex(MediaStore.Video.Media.BUCKET_ID)
+
+                while (cursor.moveToNext()) {
+                    val bucketId = cursor.getString(bucketColumnId)
+                    val album = albumHashMap[bucketId]
+                    if (album == null) {
+                        val folderName = cursor.getString(bucketColumn)
+                        albumHashMap[bucketId] = mutableMapOf(
+                            "id" to bucketId,
+                            "mediumType" to videoType,
+                            "name" to folderName,
+                            "count" to 1
+                        )
+                    } else {
+                        val count = album["count"] as Int
+                        album["count"] = count + 1
+                    }
+                    total++
+                }
+            }
+
+            val albumList = mutableListOf<Map<String, Any>>()
+            albumList.add(mapOf(
+                "id" to allAlbumId,
+                "mediumType" to videoType,
+                "name" to allAlbumName,
+                "count" to total))
+            albumList.addAll(albumHashMap.values)
+            return albumList
+        }
+        return listOf()
+    }
+
+    private fun listImages(albumId: String, total: Int, skip: Int?, take: Int?): Map<String, Any> {
+        val media = mutableListOf<Map<String, Any?>>()
+        val offset = skip ?: 0
+        val limit = take ?: (total - offset)
+
+        this.context?.run {
+            val imageCursor = this.contentResolver.query(
+                MediaStore.Images.Media.EXTERNAL_CONTENT_URI,
+                imageMetadataProjection,
+                if (albumId == allAlbumId) null else "${MediaStore.Images.Media.BUCKET_ID} = $albumId",
+                null,
+                "$imageOrderBy LIMIT $limit OFFSET $offset"
+            )
+
+            imageCursor?.use { cursor ->
+                while (cursor.moveToNext()) {
+                    media.add(getImageMetadata(cursor))
+                }
+            }
+        }
+
+        return mapOf(
+            "start" to offset,
+            "total" to total,
+            "items" to media
+        )
+    }
+
+    private fun listVideos(albumId: String, total: Int, skip: Int?, take: Int?): Map<String, Any> {
+        val media = mutableListOf<Map<String, Any?>>()
+        val offset = skip ?: 0
+        val limit = take ?: (total - offset)
+
+        this.context?.run {
+            val videoCursor = this.contentResolver.query(
+                MediaStore.Video.Media.EXTERNAL_CONTENT_URI,
+                videoMetadataProjection,
+                if (albumId == allAlbumId) null else "${MediaStore.Images.Media.BUCKET_ID} = $albumId",
+                null,
+                "$videoOrderBy LIMIT $limit OFFSET $offset")
+
+            videoCursor?.use { cursor ->
+                while (cursor.moveToNext()) {
+                    media.add(getVideoMetadata(cursor))
+                }
+            }
+        }
+
+        return mapOf(
+            "start" to offset,
+            "total" to total,
+            "items" to media
+        )
+    }
+
+    private fun getMedium(mediumId: String, mediumType: String?): Map<String, Any?>? {
+        return when (mediumType) {
+            imageType -> {
+                getImageMedia(mediumId)
+            }
+            videoType -> {
+                getVideoMedia(mediumId)
+            }
+            else -> {
+                getImageMedia(mediumId) ?: getVideoMedia(mediumId)
+            }
+        }
+    }
+
+    private fun getImageMedia(mediumId: String): Map<String, Any?>? {
+        var imageMetadata: Map<String, Any?>? = null
+
+        this.context?.run {
+            val imageCursor = this.contentResolver.query(
+                MediaStore.Images.Media.EXTERNAL_CONTENT_URI,
+                imageMetadataProjection,
+                "${MediaStore.Images.Media._ID} = $mediumId",
+                null,
+                null
+            )
+
+            imageCursor?.use { cursor ->
+                if (cursor.moveToFirst()) {
+                    imageMetadata = getImageMetadata(cursor)
+                }
+            }
+        }
+
+        return imageMetadata
+    }
+
+    private fun getVideoMedia(mediumId: String): Map<String, Any?>? {
+        var videoMetadata: Map<String, Any?>? = null
+
+        this.context?.run {
+            val videoCursor = this.contentResolver.query(
+                MediaStore.Video.Media.EXTERNAL_CONTENT_URI,
+                videoMetadataProjection,
+                "${MediaStore.Images.Media._ID} = $mediumId",
+                null,
+                null)
+
+            videoCursor?.use { cursor ->
+                if (cursor.moveToFirst()) {
+                    videoMetadata = getVideoMetadata(cursor)
+                }
+            }
+        }
+
+        return videoMetadata
+    }
+
+    private fun getThumbnail(mediumId: String, mediumType: String?, width: Int?, height: Int?): ByteArray? {
+        return when (mediumType) {
+            imageType -> {
+                getImageThumbnail(mediumId, width, height)
+            }
+            videoType -> {
+                getVideoThumbnail(mediumId, width, height)
+            }
+            else -> {
+                getImageThumbnail(mediumId, width, height)
+                    ?: getVideoThumbnail(mediumId, width, height)
+            }
+        }
+    }
+
+    private fun getImageThumbnail(mediumId: String, width: Int?, height: Int?): ByteArray? {
+        var byteArray: ByteArray? = null
+
+        val bitmap: Bitmap? = this.context?.run {
+            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q) {
+                this.contentResolver.loadThumbnail(
+                    ContentUris.withAppendedId(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, mediumId.toLong()),
+                    Size(width ?: 72, height ?: 72),
+                    null
+                )
+            } else {
+                MediaStore.Images.Thumbnails.getThumbnail(
+                    this.contentResolver, mediumId.toLong(),
+                    MediaStore.Images.Thumbnails.MINI_KIND,
+                    null
+                )
+            }
+        }
+        bitmap?.run {
+            ByteArrayOutputStream().use { stream ->
+                this.compress(Bitmap.CompressFormat.JPEG, 100, stream)
+                byteArray = stream.toByteArray()
+            }
+        }
+
+        return byteArray
+    }
+
+    private fun getVideoThumbnail(mediumId: String, width: Int?, height: Int?): ByteArray? {
+        var byteArray: ByteArray? = null
+
+        val bitmap: Bitmap? = this.context?.run {
+            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q) {
+                this.contentResolver.loadThumbnail(
+                    ContentUris.withAppendedId(MediaStore.Video.Media.EXTERNAL_CONTENT_URI, mediumId.toLong()),
+                    Size(width ?: 72, height ?: 72),
+                    null
+                )
+            } else {
+                MediaStore.Video.Thumbnails.getThumbnail(
+                    this.contentResolver, mediumId.toLong(),
+                    MediaStore.Images.Thumbnails.MINI_KIND,
+                    null
+                )
+            }
+        }
+        bitmap?.run {
+            ByteArrayOutputStream().use { stream ->
+                this.compress(Bitmap.CompressFormat.JPEG, 100, stream)
+                byteArray = stream.toByteArray()
+            }
+        }
+
+        return byteArray
+    }
+
+    private fun getAlbumThumbnail(albumId: String, width: Int?, height: Int?): ByteArray? {
+        return this.context?.run {
+            val imageCursor = this.contentResolver.query(
+                MediaStore.Images.Media.EXTERNAL_CONTENT_URI,
+                arrayOf(MediaStore.Images.Media._ID),
+                if (albumId == allAlbumId) null else "${MediaStore.Images.Media.BUCKET_ID} = $albumId",
+                null,
+                MediaStore.Images.Media.DATE_TAKEN + " DESC LIMIT 1"
+            )
+            imageCursor?.use { cursor ->
+                if (cursor.moveToFirst()) {
+                    val idColumn = cursor.getColumnIndex(MediaStore.Images.Media._ID)
+                    val id = cursor.getLong(idColumn)
+                    return@run getImageThumbnail(id.toString(), width, height)
+                }
+            }
+
+            val videoCursor = this.contentResolver.query(
+                MediaStore.Video.Media.EXTERNAL_CONTENT_URI,
+                arrayOf(MediaStore.Video.Media._ID),
+                if (albumId == allAlbumId) null else "${MediaStore.Video.Media.BUCKET_ID} = $albumId",
+                null,
+                MediaStore.Video.Media.DATE_TAKEN + " DESC LIMIT 1"
+            )
+            videoCursor?.use { cursor ->
+                if (cursor.moveToNext()) {
+                    val idColumn = cursor.getColumnIndex(MediaStore.Video.Media._ID)
+                    val id = cursor.getLong(idColumn)
+                    return@run getVideoThumbnail(id.toString(), width, height)
+                }
+            }
+
+            return@run null
+        }
+    }
+
+    private fun getFile(mediumId: String, mediumType: String?): String? {
+        return when (mediumType) {
+            imageType -> {
+                getImageFile(mediumId)
+            }
+            videoType -> {
+                getVideoFile(mediumId)
+            }
+            else -> {
+                getImageFile(mediumId) ?: getVideoFile(mediumId)
+            }
+        }
+    }
+
+    private fun getImageFile(mediumId: String): String? {
+        var path: String? = null
+
+        this.context?.run {
+            val imageCursor = this.contentResolver.query(
+                MediaStore.Images.Media.EXTERNAL_CONTENT_URI,
+                arrayOf(MediaStore.Images.Media.DATA),
+                "${MediaStore.Images.Media._ID} = $mediumId",
+                null,
+                null
+            )
+
+            imageCursor?.use { cursor ->
+                if (cursor.moveToNext()) {
+                    val dataColumn = cursor.getColumnIndex(MediaStore.Images.Media.DATA)
+                    path = cursor.getString(dataColumn)
+                }
+            }
+        }
+
+        return path
+    }
+
+    private fun getVideoFile(mediumId: String): String? {
+        var path: String? = null
+
+        this.context?.run {
+            val videoCursor = this.contentResolver.query(
+                MediaStore.Video.Media.EXTERNAL_CONTENT_URI,
+                arrayOf(MediaStore.Images.Media.DATA),
+                "${MediaStore.Images.Media._ID} = $mediumId",
+                null,
+                null)
+
+            videoCursor?.use { cursor ->
+                if (cursor.moveToNext()) {
+                    val dataColumn = cursor.getColumnIndex(MediaStore.Video.Media.DATA)
+                    path = cursor.getString(dataColumn)
+                }
+            }
+        }
+
+        return path
+    }
+
+    private fun getImageMetadata(cursor: Cursor): Map<String, Any?> {
+        val idColumn = cursor.getColumnIndex(MediaStore.Images.Media._ID)
+        val widthColumn = cursor.getColumnIndex(MediaStore.Images.Media.WIDTH)
+        val heightColumn = cursor.getColumnIndex(MediaStore.Images.Media.HEIGHT)
+        val dateTakenColumn = cursor.getColumnIndex(MediaStore.Images.Media.DATE_TAKEN)
+        val dateModifiedColumn = cursor.getColumnIndex(MediaStore.Images.Media.DATE_MODIFIED)
+
+        val id = cursor.getLong(idColumn)
+        val width = cursor.getLong(widthColumn)
+        val height = cursor.getLong(heightColumn)
+        var dateTaken: Long? = null
+        if (cursor.getType(dateTakenColumn) == FIELD_TYPE_INTEGER) {
+            dateTaken = cursor.getLong(dateTakenColumn)
+        }
+        var dateModified: Long? = null
+        if (cursor.getType(dateModifiedColumn) == FIELD_TYPE_INTEGER) {
+            dateModified = cursor.getLong(dateModifiedColumn) * 1000
+        }
+
+        return mapOf(
+            "id" to id.toString(),
+            "mediumType" to imageType,
+            "width" to width,
+            "height" to height,
+            "creationDate" to dateTaken,
+            "modifiedDate" to dateModified
+        )
+    }
+
+    private fun getVideoMetadata(cursor: Cursor): Map<String, Any?> {
+        val idColumn = cursor.getColumnIndex(MediaStore.Video.Media._ID)
+        val widthColumn = cursor.getColumnIndex(MediaStore.Video.Media.WIDTH)
+        val heightColumn = cursor.getColumnIndex(MediaStore.Video.Media.HEIGHT)
+        val dateTakenColumn = cursor.getColumnIndex(MediaStore.Video.Media.DATE_TAKEN)
+        val dateModifiedColumn = cursor.getColumnIndex(MediaStore.Video.Media.DATE_MODIFIED)
+
+        val id = cursor.getLong(idColumn)
+        val width = cursor.getLong(widthColumn)
+        val height = cursor.getLong(heightColumn)
+        var dateTaken: Long? = null
+        if (cursor.getType(dateTakenColumn) == FIELD_TYPE_INTEGER) {
+            dateTaken = cursor.getLong(dateTakenColumn)
+        }
+        var dateModified: Long? = null
+        if (cursor.getType(dateModifiedColumn) == FIELD_TYPE_INTEGER) {
+            dateModified = cursor.getLong(dateModifiedColumn) * 1000
+        }
+
+        return mapOf(
+            "id" to id.toString(),
+            "mediumType" to videoType,
+            "width" to width,
+            "height" to height,
+            "creationDate" to dateTaken,
+            "modifiedDate" to dateModified
+        )
+    }
+}
+
+class BackgroundAsyncTask<T>(val handler: () -> T, val post: (result: T) -> Unit) : AsyncTask<Void, Void, T>() {
+    init {
+        execute()
+    }
+
+    override fun doInBackground(vararg params: Void?): T {
+        return handler()
+    }
+
+    override fun onPostExecute(result: T) {
+        super.onPostExecute(result)
+        post(result)
+        return
+    }
+}

example/.gitignore

@@ -0,0 +1,43 @@
+# Miscellaneous
+*.class
+*.log
+*.pyc
+*.swp
+.DS_Store
+.atom/
+.buildlog/
+.history
+.svn/
+
+# IntelliJ related
+*.iml
+*.ipr
+*.iws
+.idea/
+
+# The .vscode folder contains launch configuration and tasks you configure in
+# VS Code which you may wish to be included in version control, so this line
+# is commented out by default.
+#.vscode/
+
+# Flutter/Dart/Pub related
+**/doc/api/
+.dart_tool/
+.flutter-plugins
+.flutter-plugins-dependencies
+.packages
+.pub-cache/
+.pub/
+/build/
+
+# Web related
+lib/generated_plugin_registrant.dart
+
+# Symbolication related
+app.*.symbols
+
+# Obfuscation related
+app.*.map.json
+
+# Exceptions to above rules.
+!/packages/flutter_tools/test/data/dart_dependencies_test/**/.packages

example/.metadata

@@ -0,0 +1,10 @@
+# This file tracks properties of this Flutter project.
+# Used by Flutter tool to assess capabilities and perform upgrades etc.
+#
+# This file should be version controlled and should not be manually edited.
+
+version:
+  revision: 8af6b2f038c1172e61d418869363a28dffec3cb4
+  channel: stable
+
+project_type: app

example/README.md

@@ -0,0 +1,14 @@
+# photo_gallery_example
+
+Demonstrates how to use the photo_gallery plugin.
+
+Use photo_gallery plugin to list images and videos from mobile native gallery. support both iOS and Android (with the help of image_picker plugin).
+
+## Install
+```shell script
+flutter pub get
+```
+## Run
+```shell script
+flutter run
+```

example/android/.gitignore

@@ -0,0 +1,7 @@
+gradle-wrapper.jar
+/.gradle
+/captures/
+/gradlew
+/gradlew.bat
+/local.properties
+GeneratedPluginRegistrant.java

example/android/app/build.gradle

@@ -0,0 +1,54 @@
+def localProperties = new Properties()
+def localPropertiesFile = rootProject.file('local.properties')
+if (localPropertiesFile.exists()) {
+    localPropertiesFile.withReader('UTF-8') { reader ->
+        localProperties.load(reader)
+    }
+}
+
+def flutterRoot = localProperties.getProperty('flutter.sdk')
+if (flutterRoot == null) {
+    throw new FileNotFoundException("Flutter SDK not found. Define location with flutter.sdk in the local.properties file.")
+}
+
+def flutterVersionCode = localProperties.getProperty('flutter.versionCode')
+if (flutterVersionCode == null) {
+    flutterVersionCode = '1'
+}
+
+def flutterVersionName = localProperties.getProperty('flutter.versionName')
+if (flutterVersionName == null) {
+    flutterVersionName = '1.0'
+}
+
+apply plugin: 'com.android.application'
+apply plugin: 'kotlin-android'
+apply from: "$flutterRoot/packages/flutter_tools/gradle/flutter.gradle"
+
+android {
+    compileSdkVersion 29
+
+    sourceSets {
+        main.java.srcDirs += 'src/main/kotlin'
+    }
+
+    lintOptions {
+        disable 'InvalidPackage'
+    }
+
+    defaultConfig {
+        applicationId "com.morbit.photo_gallery_example"
+        minSdkVersion 16
+        targetSdkVersion 29
+        versionCode flutterVersionCode.toInteger()
+        versionName flutterVersionName
+    }
+}
+
+flutter {
+    source '../..'
+}
+
+dependencies {
+    implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
+}

example/android/app/src/debug/AndroidManifest.xml

@@ -0,0 +1,7 @@
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    package="com.morbit.photo_gallery_example">
+    <!-- Flutter needs it to communicate with the running application
+         to allow setting breakpoints, to provide hot reload, etc.
+    -->
+    <uses-permission android:name="android.permission.INTERNET" />
+</manifest>

example/android/app/src/main/AndroidManifest.xml

@@ -0,0 +1,49 @@
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    package="com.morbit.photo_gallery_example">
+    <!-- io.flutter.app.FlutterApplication is an android.app.Application that
+         calls FlutterMain.startInitialization(this); in its onCreate method.
+         In most cases you can leave this as-is, but you if you want to provide
+         additional functionality it is fine to subclass or reimplement
+         FlutterApplication and put your custom class here. -->
+    <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
+    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
+
+    <application
+        android:name="io.flutter.app.FlutterApplication"
+        android:requestLegacyExternalStorage="true"
+        android:label="photo_gallery_example"
+        android:icon="@mipmap/ic_launcher">
+        <activity
+            android:name=".MainActivity"
+            android:launchMode="singleTop"
+            android:theme="@style/LaunchTheme"
+            android:configChanges="orientation|keyboardHidden|keyboard|screenSize|smallestScreenSize|locale|layoutDirection|fontScale|screenLayout|density|uiMode"
+            android:hardwareAccelerated="true"
+            android:windowSoftInputMode="adjustResize">
+            <!-- Specifies an Android theme to apply to this Activity as soon as
+                 the Android process has started. This theme is visible to the user
+                 while the Flutter UI initializes. After that, this theme continues
+                 to determine the Window background behind the Flutter UI. -->
+            <meta-data
+                android:name="io.flutter.embedding.android.NormalTheme"
+                android:resource="@style/NormalTheme" />
+            <!-- Displays an Android View that continues showing the launch screen
+                 Drawable until Flutter paints its first frame, then this splash
+                 screen fades out. A splash screen is useful to avoid any visual
+                 gap between the end of Android's launch screen and the painting of
+                 Flutter's first frame. -->
+            <meta-data
+                android:name="io.flutter.embedding.android.SplashScreenDrawable"
+                android:resource="@drawable/launch_background" />
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+                <category android:name="android.intent.category.LAUNCHER" />
+            </intent-filter>
+        </activity>
+        <!-- Don't delete the meta-data below.
+             This is used by the Flutter tool to generate GeneratedPluginRegistrant.java -->
+        <meta-data
+            android:name="flutterEmbedding"
+            android:value="2" />
+    </application>
+</manifest>

example/android/app/src/main/kotlin/com/morbit/photo_gallery_example/MainActivity.kt

@@ -0,0 +1,6 @@
+package com.morbit.photo_gallery_example
+
+import io.flutter.embedding.android.FlutterActivity
+
+class MainActivity : FlutterActivity() {
+}

example/android/app/src/main/res/drawable/launch_background.xml

@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="utf-8"?><!-- Modify this file to customize your launch splash screen -->
+<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
+    <item android:drawable="@android:color/white" />
+
+    <!-- You can insert your own image assets here -->
+    <!-- <item>
+        <bitmap
+            android:gravity="center"
+            android:src="@mipmap/launch_image" />
+    </item> -->
+</layer-list>

example/android/app/src/main/res/values/styles.xml

@@ -0,0 +1,18 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <!-- Theme applied to the Android Window while the process is starting -->
+    <style name="LaunchTheme" parent="@android:style/Theme.Black.NoTitleBar">
+        <!-- Show a splash screen on the activity. Automatically removed when
+             Flutter draws its first frame -->
+        <item name="android:windowBackground">@drawable/launch_background</item>
+    </style>
+    <!-- Theme applied to the Android Window as soon as the process has started.
+         This theme determines the color of the Android Window while your
+         Flutter UI initializes, as well as behind your Flutter UI while its
+         running.
+         
+         This Theme is only used starting with V2 of Flutter's Android embedding. -->
+    <style name="NormalTheme" parent="@android:style/Theme.Black.NoTitleBar">
+        <item name="android:windowBackground">@android:color/white</item>
+    </style>
+</resources>

example/android/app/src/profile/AndroidManifest.xml

@@ -0,0 +1,7 @@
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    package="com.morbit.photo_gallery_example">
+    <!-- Flutter needs it to communicate with the running application
+         to allow setting breakpoints, to provide hot reload, etc.
+    -->
+    <uses-permission android:name="android.permission.INTERNET" />
+</manifest>

example/android/build.gradle

@@ -0,0 +1,31 @@
+buildscript {
+    ext.kotlin_version = '1.3.72'
+    repositories {
+        google()
+        jcenter()
+    }
+
+    dependencies {
+        classpath 'com.android.tools.build:gradle:3.5.0'
+        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
+    }
+}
+
+allprojects {
+    repositories {
+        google()
+        jcenter()
+    }
+}
+
+rootProject.buildDir = '../build'
+subprojects {
+    project.buildDir = "${rootProject.buildDir}/${project.name}"
+}
+subprojects {
+    project.evaluationDependsOn(':app')
+}
+
+task clean(type: Delete) {
+    delete rootProject.buildDir
+}

example/android/gradle.properties

@@ -0,0 +1,4 @@
+org.gradle.jvmargs=-Xmx1536M
+android.enableR8=true
+android.useAndroidX=true
+android.enableJetifier=true

example/android/gradle/wrapper/gradle-wrapper.properties

@@ -0,0 +1,6 @@
+#Fri Jun 23 08:50:38 CEST 2017
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-5.6.4-all.zip

example/android/settings.gradle

@@ -0,0 +1,15 @@
+// Copyright 2014 The Flutter Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+include ':app'
+
+def localPropertiesFile = new File(rootProject.projectDir, "local.properties")
+def properties = new Properties()
+
+assert localPropertiesFile.exists()
+localPropertiesFile.withReader("UTF-8") { reader -> properties.load(reader) }
+
+def flutterSdkPath = properties.getProperty("flutter.sdk")
+assert flutterSdkPath != null, "flutter.sdk not set in local.properties"
+apply from: "$flutterSdkPath/packages/flutter_tools/gradle/app_plugin_loader.gradle"

example/android/settings_aar.gradle

@@ -0,0 +1 @@
+include ':app'

example/ios/.gitignore

@@ -0,0 +1,32 @@
+*.mode1v3
+*.mode2v3
+*.moved-aside
+*.pbxuser
+*.perspectivev3
+**/*sync/
+.sconsign.dblite
+.tags*
+**/.vagrant/
+**/DerivedData/
+Icon?
+**/Pods/
+**/.symlinks/
+profile
+xcuserdata
+**/.generated/
+Flutter/App.framework
+Flutter/Flutter.framework
+Flutter/Flutter.podspec
+Flutter/Generated.xcconfig
+Flutter/app.flx
+Flutter/app.zip
+Flutter/flutter_assets/
+Flutter/flutter_export_environment.sh
+ServiceDefinitions.json
+Runner/GeneratedPluginRegistrant.*
+
+# Exceptions to above rules.
+!default.mode1v3
+!default.mode2v3
+!default.pbxuser
+!default.perspectivev3

example/ios/Flutter/AppFrameworkInfo.plist

@@ -0,0 +1,26 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+  <key>CFBundleDevelopmentRegion</key>
+  <string>$(DEVELOPMENT_LANGUAGE)</string>
+  <key>CFBundleExecutable</key>
+  <string>App</string>
+  <key>CFBundleIdentifier</key>
+  <string>io.flutter.flutter.app</string>
+  <key>CFBundleInfoDictionaryVersion</key>
+  <string>6.0</string>
+  <key>CFBundleName</key>
+  <string>App</string>
+  <key>CFBundlePackageType</key>
+  <string>FMWK</string>
+  <key>CFBundleShortVersionString</key>
+  <string>1.0</string>
+  <key>CFBundleSignature</key>
+  <string>????</string>
+  <key>CFBundleVersion</key>
+  <string>1.0</string>
+  <key>MinimumOSVersion</key>
+  <string>8.0</string>
+</dict>
+</plist>

example/ios/Flutter/Debug.xcconfig

@@ -0,0 +1,2 @@
+#include "Pods/Target Support Files/Pods-Runner/Pods-Runner.debug.xcconfig"
+#include "Generated.xcconfig"

example/ios/Flutter/Release.xcconfig

@@ -0,0 +1,2 @@
+#include "Pods/Target Support Files/Pods-Runner/Pods-Runner.release.xcconfig"
+#include "Generated.xcconfig"

example/ios/Podfile

@@ -0,0 +1,87 @@
+# Uncomment this line to define a global platform for your project
+# platform :ios, '9.0'
+
+# CocoaPods analytics sends network stats synchronously affecting flutter build latency.
+ENV['COCOAPODS_DISABLE_STATS'] = 'true'
+
+project 'Runner', {
+  'Debug' => :debug,
+  'Profile' => :release,
+  'Release' => :release,
+}
+
+def parse_KV_file(file, separator='=')
+  file_abs_path = File.expand_path(file)
+  if !File.exists? file_abs_path
+    return [];
+  end
+  generated_key_values = {}
+  skip_line_start_symbols = ["#", "/"]
+  File.foreach(file_abs_path) do |line|
+    next if skip_line_start_symbols.any? { |symbol| line =~ /^\s*#{symbol}/ }
+    plugin = line.split(pattern=separator)
+    if plugin.length == 2
+      podname = plugin[0].strip()
+      path = plugin[1].strip()
+      podpath = File.expand_path("#{path}", file_abs_path)
+      generated_key_values[podname] = podpath
+    else
+      puts "Invalid plugin specification: #{line}"
+    end
+  end
+  generated_key_values
+end
+
+target 'Runner' do
+  use_frameworks!
+  use_modular_headers!
+
+  # Flutter Pod
+
+  copied_flutter_dir = File.join(__dir__, 'Flutter')
+  copied_framework_path = File.join(copied_flutter_dir, 'Flutter.framework')
+  copied_podspec_path = File.join(copied_flutter_dir, 'Flutter.podspec')
+  unless File.exist?(copied_framework_path) && File.exist?(copied_podspec_path)
+    # Copy Flutter.framework and Flutter.podspec to Flutter/ to have something to link against if the xcode backend script has not run yet.
+    # That script will copy the correct debug/profile/release version of the framework based on the currently selected Xcode configuration.
+    # CocoaPods will not embed the framework on pod install (before any build phases can generate) if the dylib does not exist.
+
+    generated_xcode_build_settings_path = File.join(copied_flutter_dir, 'Generated.xcconfig')
+    unless File.exist?(generated_xcode_build_settings_path)
+      raise "Generated.xcconfig must exist. If you're running pod install manually, make sure flutter pub get is executed first"
+    end
+    generated_xcode_build_settings = parse_KV_file(generated_xcode_build_settings_path)
+    cached_framework_dir = generated_xcode_build_settings['FLUTTER_FRAMEWORK_DIR'];
+
+    unless File.exist?(copied_framework_path)
+      FileUtils.cp_r(File.join(cached_framework_dir, 'Flutter.framework'), copied_flutter_dir)
+    end
+    unless File.exist?(copied_podspec_path)
+      FileUtils.cp(File.join(cached_framework_dir, 'Flutter.podspec'), copied_flutter_dir)
+    end
+  end
+
+  # Keep pod path relative so it can be checked into Podfile.lock.
+  pod 'Flutter', :path => 'Flutter'
+
+  # Plugin Pods
+
+  # Prepare symlinks folder. We use symlinks to avoid having Podfile.lock
+  # referring to absolute paths on developers' machines.
+  system('rm -rf .symlinks')
+  system('mkdir -p .symlinks/plugins')
+  plugin_pods = parse_KV_file('../.flutter-plugins')
+  plugin_pods.each do |name, path|
+    symlink = File.join('.symlinks', 'plugins', name)
+    File.symlink(path, symlink)
+    pod name, :path => File.join(symlink, 'ios')
+  end
+end
+
+post_install do |installer|
+  installer.pods_project.targets.each do |target|
+    target.build_configurations.each do |config|
+      config.build_settings['ENABLE_BITCODE'] = 'NO'
+    end
+  end
+end

example/ios/Podfile.lock

@@ -0,0 +1,28 @@
+PODS:
+  - Flutter (1.0.0)
+  - "permission_handler (5.0.1+1)":
+    - Flutter
+  - photo_gallery (0.0.1):
+    - Flutter
+
+DEPENDENCIES:
+  - Flutter (from `Flutter`)
+  - permission_handler (from `.symlinks/plugins/permission_handler/ios`)
+  - photo_gallery (from `.symlinks/plugins/photo_gallery/ios`)
+
+EXTERNAL SOURCES:
+  Flutter:
+    :path: Flutter
+  permission_handler:
+    :path: ".symlinks/plugins/permission_handler/ios"
+  photo_gallery:
+    :path: ".symlinks/plugins/photo_gallery/ios"
+
+SPEC CHECKSUMS:
+  Flutter: 0e3d915762c693b495b44d77113d4970485de6ec
+  permission_handler: eac8e15b4a1a3fba55b761d19f3f4e6b005d15b6
+  photo_gallery: 9f95e57747cd22c10676ece3660d1ffe6c603ee5
+
+PODFILE CHECKSUM: c34e2287a9ccaa606aeceab922830efb9a6ff69a
+
+COCOAPODS: 1.9.3

example/ios/Runner.xcodeproj/project.pbxproj

@@ -0,0 +1,577 @@
+// !$*UTF8*$!
+{
+	archiveVersion = 1;
+	classes = {
+	};
+	objectVersion = 46;
+	objects = {
+
+/* Begin PBXBuildFile section */
+		1498D2341E8E89220040F4C2 /* GeneratedPluginRegistrant.m in Sources */ = {isa = PBXBuildFile; fileRef = 1498D2331E8E89220040F4C2 /* GeneratedPluginRegistrant.m */; };
+		3B3967161E833CAA004F5970 /* AppFrameworkInfo.plist in Resources */ = {isa = PBXBuildFile; fileRef = 3B3967151E833CAA004F5970 /* AppFrameworkInfo.plist */; };
+		74858FAF1ED2DC5600515810 /* AppDelegate.swift in Sources */ = {isa = PBXBuildFile; fileRef = 74858FAE1ED2DC5600515810 /* AppDelegate.swift */; };
+		97C146FC1CF9000F007C117D /* Main.storyboard in Resources */ = {isa = PBXBuildFile; fileRef = 97C146FA1CF9000F007C117D /* Main.storyboard */; };
+		97C146FE1CF9000F007C117D /* Assets.xcassets in Resources */ = {isa = PBXBuildFile; fileRef = 97C146FD1CF9000F007C117D /* Assets.xcassets */; };
+		97C147011CF9000F007C117D /* LaunchScreen.storyboard in Resources */ = {isa = PBXBuildFile; fileRef = 97C146FF1CF9000F007C117D /* LaunchScreen.storyboard */; };
+		FC9C4708640E3D61822E65FE /* Pods_Runner.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = D559FAF83BE8A73D7D2342A6 /* Pods_Runner.framework */; };
+/* End PBXBuildFile section */
+
+/* Begin PBXCopyFilesBuildPhase section */
+		9705A1C41CF9048500538489 /* Embed Frameworks */ = {
+			isa = PBXCopyFilesBuildPhase;
+			buildActionMask = 2147483647;
+			dstPath = "";
+			dstSubfolderSpec = 10;
+			files = (
+			);
+			name = "Embed Frameworks";
+			runOnlyForDeploymentPostprocessing = 0;
+		};
+/* End PBXCopyFilesBuildPhase section */
+
+/* Begin PBXFileReference section */
+		1498D2321E8E86230040F4C2 /* GeneratedPluginRegistrant.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = GeneratedPluginRegistrant.h; sourceTree = "<group>"; };
+		1498D2331E8E89220040F4C2 /* GeneratedPluginRegistrant.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = GeneratedPluginRegistrant.m; sourceTree = "<group>"; };
+		3B3967151E833CAA004F5970 /* AppFrameworkInfo.plist */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = text.plist.xml; name = AppFrameworkInfo.plist; path = Flutter/AppFrameworkInfo.plist; sourceTree = "<group>"; };
+		74858FAD1ED2DC5600515810 /* Runner-Bridging-Header.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = "Runner-Bridging-Header.h"; sourceTree = "<group>"; };
+		74858FAE1ED2DC5600515810 /* AppDelegate.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = AppDelegate.swift; sourceTree = "<group>"; };
+		776376D62B8541C00FA61280 /* Pods-Runner.debug.xcconfig */ = {isa = PBXFileReference; includeInIndex = 1; lastKnownFileType = text.xcconfig; name = "Pods-Runner.debug.xcconfig"; path = "Target Support Files/Pods-Runner/Pods-Runner.debug.xcconfig"; sourceTree = "<group>"; };
+		7AFA3C8E1D35360C0083082E /* Release.xcconfig */ = {isa = PBXFileReference; lastKnownFileType = text.xcconfig; name = Release.xcconfig; path = Flutter/Release.xcconfig; sourceTree = "<group>"; };
+		9740EEB21CF90195004384FC /* Debug.xcconfig */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = text.xcconfig; name = Debug.xcconfig; path = Flutter/Debug.xcconfig; sourceTree = "<group>"; };
+		9740EEB31CF90195004384FC /* Generated.xcconfig */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = text.xcconfig; name = Generated.xcconfig; path = Flutter/Generated.xcconfig; sourceTree = "<group>"; };
+		97C146EE1CF9000F007C117D /* Runner.app */ = {isa = PBXFileReference; explicitFileType = wrapper.application; includeInIndex = 0; path = Runner.app; sourceTree = BUILT_PRODUCTS_DIR; };
+		97C146FB1CF9000F007C117D /* Base */ = {isa = PBXFileReference; lastKnownFileType = file.storyboard; name = Base; path = Base.lproj/Main.storyboard; sourceTree = "<group>"; };
+		97C146FD1CF9000F007C117D /* Assets.xcassets */ = {isa = PBXFileReference; lastKnownFileType = folder.assetcatalog; path = Assets.xcassets; sourceTree = "<group>"; };
+		97C147001CF9000F007C117D /* Base */ = {isa = PBXFileReference; lastKnownFileType = file.storyboard; name = Base; path = Base.lproj/LaunchScreen.storyboard; sourceTree = "<group>"; };
+		97C147021CF9000F007C117D /* Info.plist */ = {isa = PBXFileReference; lastKnownFileType = text.plist.xml; path = Info.plist; sourceTree = "<group>"; };
+		D559FAF83BE8A73D7D2342A6 /* Pods_Runner.framework */ = {isa = PBXFileReference; explicitFileType = wrapper.framework; includeInIndex = 0; path = Pods_Runner.framework; sourceTree = BUILT_PRODUCTS_DIR; };
+		D88AF2C8D5BFEB43F89E0BA2 /* Pods-Runner.profile.xcconfig */ = {isa = PBXFileReference; includeInIndex = 1; lastKnownFileType = text.xcconfig; name = "Pods-Runner.profile.xcconfig"; path = "Target Support Files/Pods-Runner/Pods-Runner.profile.xcconfig"; sourceTree = "<group>"; };
+		F55339D7C431C33F2791F390 /* Pods-Runner.release.xcconfig */ = {isa = PBXFileReference; includeInIndex = 1; lastKnownFileType = text.xcconfig; name = "Pods-Runner.release.xcconfig"; path = "Target Support Files/Pods-Runner/Pods-Runner.release.xcconfig"; sourceTree = "<group>"; };
+/* End PBXFileReference section */
+
+/* Begin PBXFrameworksBuildPhase section */
+		97C146EB1CF9000F007C117D /* Frameworks */ = {
+			isa = PBXFrameworksBuildPhase;
+			buildActionMask = 2147483647;
+			files = (
+				FC9C4708640E3D61822E65FE /* Pods_Runner.framework in Frameworks */,
+			);
+			runOnlyForDeploymentPostprocessing = 0;
+		};
+/* End PBXFrameworksBuildPhase section */
+
+/* Begin PBXGroup section */
+		55400ED647B2A0FC3724CC7E /* Frameworks */ = {
+			isa = PBXGroup;
+			children = (
+				D559FAF83BE8A73D7D2342A6 /* Pods_Runner.framework */,
+			);
+			name = Frameworks;
+			sourceTree = "<group>";
+		};
+		86B90A2A5091E79163043380 /* Pods */ = {
+			isa = PBXGroup;
+			children = (
+				776376D62B8541C00FA61280 /* Pods-Runner.debug.xcconfig */,
+				F55339D7C431C33F2791F390 /* Pods-Runner.release.xcconfig */,
+				D88AF2C8D5BFEB43F89E0BA2 /* Pods-Runner.profile.xcconfig */,
+			);
+			name = Pods;
+			path = Pods;
+			sourceTree = "<group>";
+		};
+		9740EEB11CF90186004384FC /* Flutter */ = {
+			isa = PBXGroup;
+			children = (
+				3B3967151E833CAA004F5970 /* AppFrameworkInfo.plist */,
+				9740EEB21CF90195004384FC /* Debug.xcconfig */,
+				7AFA3C8E1D35360C0083082E /* Release.xcconfig */,
+				9740EEB31CF90195004384FC /* Generated.xcconfig */,
+			);
+			name = Flutter;
+			sourceTree = "<group>";
+		};
+		97C146E51CF9000F007C117D = {
+			isa = PBXGroup;
+			children = (
+				9740EEB11CF90186004384FC /* Flutter */,
+				97C146F01CF9000F007C117D /* Runner */,
+				97C146EF1CF9000F007C117D /* Products */,
+				86B90A2A5091E79163043380 /* Pods */,
+				55400ED647B2A0FC3724CC7E /* Frameworks */,
+			);
+			sourceTree = "<group>";
+		};
+		97C146EF1CF9000F007C117D /* Products */ = {
+			isa = PBXGroup;
+			children = (
+				97C146EE1CF9000F007C117D /* Runner.app */,
+			);
+			name = Products;
+			sourceTree = "<group>";
+		};
+		97C146F01CF9000F007C117D /* Runner */ = {
+			isa = PBXGroup;
+			children = (
+				97C146FA1CF9000F007C117D /* Main.storyboard */,
+				97C146FD1CF9000F007C117D /* Assets.xcassets */,
+				97C146FF1CF9000F007C117D /* LaunchScreen.storyboard */,
+				97C147021CF9000F007C117D /* Info.plist */,
+				97C146F11CF9000F007C117D /* Supporting Files */,
+				1498D2321E8E86230040F4C2 /* GeneratedPluginRegistrant.h */,
+				1498D2331E8E89220040F4C2 /* GeneratedPluginRegistrant.m */,
+				74858FAE1ED2DC5600515810 /* AppDelegate.swift */,
+				74858FAD1ED2DC5600515810 /* Runner-Bridging-Header.h */,
+			);
+			path = Runner;
+			sourceTree = "<group>";
+		};
+		97C146F11CF9000F007C117D /* Supporting Files */ = {
+			isa = PBXGroup;
+			children = (
+			);
+			name = "Supporting Files";
+			sourceTree = "<group>";
+		};
+/* End PBXGroup section */
+
+/* Begin PBXNativeTarget section */
+		97C146ED1CF9000F007C117D /* Runner */ = {
+			isa = PBXNativeTarget;
+			buildConfigurationList = 97C147051CF9000F007C117D /* Build configuration list for PBXNativeTarget "Runner" */;
+			buildPhases = (
+				3756EFFCE0B733FE0DCC8F8E /* [CP] Check Pods Manifest.lock */,
+				9740EEB61CF901F6004384FC /* Run Script */,
+				97C146EA1CF9000F007C117D /* Sources */,
+				97C146EB1CF9000F007C117D /* Frameworks */,
+				97C146EC1CF9000F007C117D /* Resources */,
+				9705A1C41CF9048500538489 /* Embed Frameworks */,
+				3B06AD1E1E4923F5004D2608 /* Thin Binary */,
+				A3B708A5D380EE3A6BAC0D0D /* [CP] Embed Pods Frameworks */,
+			);
+			buildRules = (
+			);
+			dependencies = (
+			);
+			name = Runner;
+			productName = Runner;
+			productReference = 97C146EE1CF9000F007C117D /* Runner.app */;
+			productType = "com.apple.product-type.application";
+		};
+/* End PBXNativeTarget section */
+
+/* Begin PBXProject section */
+		97C146E61CF9000F007C117D /* Project object */ = {
+			isa = PBXProject;
+			attributes = {
+				LastUpgradeCheck = 1020;
+				ORGANIZATIONNAME = "";
+				TargetAttributes = {
+					97C146ED1CF9000F007C117D = {
+						CreatedOnToolsVersion = 7.3.1;
+						LastSwiftMigration = 1100;
+					};
+				};
+			};
+			buildConfigurationList = 97C146E91CF9000F007C117D /* Build configuration list for PBXProject "Runner" */;
+			compatibilityVersion = "Xcode 9.3";
+			developmentRegion = en;
+			hasScannedForEncodings = 0;
+			knownRegions = (
+				en,
+				Base,
+			);
+			mainGroup = 97C146E51CF9000F007C117D;
+			productRefGroup = 97C146EF1CF9000F007C117D /* Products */;
+			projectDirPath = "";
+			projectRoot = "";
+			targets = (
+				97C146ED1CF9000F007C117D /* Runner */,
+			);
+		};
+/* End PBXProject section */
+
+/* Begin PBXResourcesBuildPhase section */
+		97C146EC1CF9000F007C117D /* Resources */ = {
+			isa = PBXResourcesBuildPhase;
+			buildActionMask = 2147483647;
+			files = (
+				97C147011CF9000F007C117D /* LaunchScreen.storyboard in Resources */,
+				3B3967161E833CAA004F5970 /* AppFrameworkInfo.plist in Resources */,
+				97C146FE1CF9000F007C117D /* Assets.xcassets in Resources */,
+				97C146FC1CF9000F007C117D /* Main.storyboard in Resources */,
+			);
+			runOnlyForDeploymentPostprocessing = 0;
+		};
+/* End PBXResourcesBuildPhase section */
+
+/* Begin PBXShellScriptBuildPhase section */
+		3756EFFCE0B733FE0DCC8F8E /* [CP] Check Pods Manifest.lock */ = {
+			isa = PBXShellScriptBuildPhase;
+			buildActionMask = 2147483647;
+			files = (
+			);
+			inputFileListPaths = (
+			);
+			inputPaths = (
+				"${PODS_PODFILE_DIR_PATH}/Podfile.lock",
+				"${PODS_ROOT}/Manifest.lock",
+			);
+			name = "[CP] Check Pods Manifest.lock";
+			outputFileListPaths = (
+			);
+			outputPaths = (
+				"$(DERIVED_FILE_DIR)/Pods-Runner-checkManifestLockResult.txt",
+			);
+			runOnlyForDeploymentPostprocessing = 0;
+			shellPath = /bin/sh;
+			shellScript = "diff \"${PODS_PODFILE_DIR_PATH}/Podfile.lock\" \"${PODS_ROOT}/Manifest.lock\" > /dev/null\nif [ $? != 0 ] ; then\n    # print error to STDERR\n    echo \"error: The sandbox is not in sync with the Podfile.lock. Run 'pod install' or update your CocoaPods installation.\" >&2\n    exit 1\nfi\n# This output is used by Xcode 'outputs' to avoid re-running this script phase.\necho \"SUCCESS\" > \"${SCRIPT_OUTPUT_FILE_0}\"\n";
+			showEnvVarsInLog = 0;
+		};
+		3B06AD1E1E4923F5004D2608 /* Thin Binary */ = {
+			isa = PBXShellScriptBuildPhase;
+			buildActionMask = 2147483647;
+			files = (
+			);
+			inputPaths = (
+			);
+			name = "Thin Binary";
+			outputPaths = (
+			);
+			runOnlyForDeploymentPostprocessing = 0;
+			shellPath = /bin/sh;
+			shellScript = "/bin/sh \"$FLUTTER_ROOT/packages/flutter_tools/bin/xcode_backend.sh\" embed_and_thin";
+		};
+		9740EEB61CF901F6004384FC /* Run Script */ = {
+			isa = PBXShellScriptBuildPhase;
+			buildActionMask = 2147483647;
+			files = (
+			);
+			inputPaths = (
+			);
+			name = "Run Script";
+			outputPaths = (
+			);
+			runOnlyForDeploymentPostprocessing = 0;
+			shellPath = /bin/sh;
+			shellScript = "/bin/sh \"$FLUTTER_ROOT/packages/flutter_tools/bin/xcode_backend.sh\" build";
+		};
+		A3B708A5D380EE3A6BAC0D0D /* [CP] Embed Pods Frameworks */ = {
+			isa = PBXShellScriptBuildPhase;
+			buildActionMask = 2147483647;
+			files = (
+			);
+			inputPaths = (
+				"${PODS_ROOT}/Target Support Files/Pods-Runner/Pods-Runner-frameworks.sh",
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+			);
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+			outputPaths = (
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+			);
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+				);
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+				GCC_PREPROCESSOR_DEFINITIONS = (
+					"DEBUG=1",
+					"$(inherited)",
+				);
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+				GCC_WARN_UNINITIALIZED_AUTOS = YES_AGGRESSIVE;
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+				CLANG_WARN_COMMA = YES;
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+				CLANG_WARN_DEPRECATED_OBJC_IMPLEMENTATIONS = YES;
+				CLANG_WARN_DIRECT_OBJC_ISA_USAGE = YES_ERROR;
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+				CLANG_WARN_INFINITE_RECURSION = YES;
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+				GCC_NO_COMMON_BLOCKS = YES;
+				GCC_WARN_64_TO_32_BIT_CONVERSION = YES;
+				GCC_WARN_ABOUT_RETURN_TYPE = YES_ERROR;
+				GCC_WARN_UNDECLARED_SELECTOR = YES;
+				GCC_WARN_UNINITIALIZED_AUTOS = YES_AGGRESSIVE;
+				GCC_WARN_UNUSED_FUNCTION = YES;
+				GCC_WARN_UNUSED_VARIABLE = YES;
+				IPHONEOS_DEPLOYMENT_TARGET = 8.0;
+				MTL_ENABLE_DEBUG_INFO = NO;
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+			isa = XCBuildConfiguration;
+			baseConfigurationReference = 9740EEB21CF90195004384FC /* Debug.xcconfig */;
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+				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
+				CLANG_ENABLE_MODULES = YES;
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+				ENABLE_BITCODE = NO;
+				FRAMEWORK_SEARCH_PATHS = (
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+					"$(PROJECT_DIR)/Flutter",
+				);
+				INFOPLIST_FILE = Runner/Info.plist;
+				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks";
+				LIBRARY_SEARCH_PATHS = (
+					"$(inherited)",
+					"$(PROJECT_DIR)/Flutter",
+				);
+				PRODUCT_BUNDLE_IDENTIFIER = com.morbit.photoGalleryExample;
+				PRODUCT_NAME = "$(TARGET_NAME)";
+				SWIFT_OBJC_BRIDGING_HEADER = "Runner/Runner-Bridging-Header.h";
+				SWIFT_OPTIMIZATION_LEVEL = "-Onone";
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+				VERSIONING_SYSTEM = "apple-generic";
+			};
+			name = Debug;
+		};
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+			baseConfigurationReference = 7AFA3C8E1D35360C0083082E /* Release.xcconfig */;
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+				ENABLE_BITCODE = NO;
+				FRAMEWORK_SEARCH_PATHS = (
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+					"$(PROJECT_DIR)/Flutter",
+				);
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+				LIBRARY_SEARCH_PATHS = (
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+					"$(PROJECT_DIR)/Flutter",
+				);
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+				VERSIONING_SYSTEM = "apple-generic";
+			};
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+		};
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+
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+			);
+			defaultConfigurationIsVisible = 0;
+			defaultConfigurationName = Release;
+		};
+		97C147051CF9000F007C117D /* Build configuration list for PBXNativeTarget "Runner" */ = {
+			isa = XCConfigurationList;
+			buildConfigurations = (
+				97C147061CF9000F007C117D /* Debug */,
+				97C147071CF9000F007C117D /* Release */,
+				249021D4217E4FDB00AE95B9 /* Profile */,
+			);
+			defaultConfigurationIsVisible = 0;
+			defaultConfigurationName = Release;
+		};
+/* End XCConfigurationList section */
+	};
+	rootObject = 97C146E61CF9000F007C117D /* Project object */;
+}

example/ios/Runner.xcodeproj/project.xcworkspace/contents.xcworkspacedata

@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<Workspace
+   version = "1.0">
+   <FileRef
+      location = "group:Runner.xcodeproj">
+   </FileRef>
+</Workspace>

example/ios/Runner.xcodeproj/project.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist

@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>IDEDidComputeMac32BitWarning</key>
+	<true/>
+</dict>
+</plist>

example/ios/Runner.xcodeproj/project.xcworkspace/xcshareddata/WorkspaceSettings.xcsettings

@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>PreviewsEnabled</key>
+	<false/>
+</dict>
+</plist>

example/ios/Runner.xcodeproj/xcshareddata/xcschemes/Runner.xcscheme

@@ -0,0 +1,91 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<Scheme
+   LastUpgradeVersion = "1020"
+   version = "1.3">
+   <BuildAction
+      parallelizeBuildables = "YES"
+      buildImplicitDependencies = "YES">
+      <BuildActionEntries>
+         <BuildActionEntry
+            buildForTesting = "YES"
+            buildForRunning = "YES"
+            buildForProfiling = "YES"
+            buildForArchiving = "YES"
+            buildForAnalyzing = "YES">
+            <BuildableReference
+               BuildableIdentifier = "primary"
+               BlueprintIdentifier = "97C146ED1CF9000F007C117D"
+               BuildableName = "Runner.app"
+               BlueprintName = "Runner"
+               ReferencedContainer = "container:Runner.xcodeproj">
+            </BuildableReference>
+         </BuildActionEntry>
+      </BuildActionEntries>
+   </BuildAction>
+   <TestAction
+      buildConfiguration = "Debug"
+      selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
+      selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
+      shouldUseLaunchSchemeArgsEnv = "YES">
+      <Testables>
+      </Testables>
+      <MacroExpansion>
+         <BuildableReference
+            BuildableIdentifier = "primary"
+            BlueprintIdentifier = "97C146ED1CF9000F007C117D"
+            BuildableName = "Runner.app"
+            BlueprintName = "Runner"
+            ReferencedContainer = "container:Runner.xcodeproj">
+         </BuildableReference>
+      </MacroExpansion>
+      <AdditionalOptions>
+      </AdditionalOptions>
+   </TestAction>
+   <LaunchAction
+      buildConfiguration = "Debug"
+      selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
+      selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
+      launchStyle = "0"
+      useCustomWorkingDirectory = "NO"
+      ignoresPersistentStateOnLaunch = "NO"
+      debugDocumentVersioning = "YES"
+      debugServiceExtension = "internal"
+      allowLocationSimulation = "YES">
+      <BuildableProductRunnable
+         runnableDebuggingMode = "0">
+         <BuildableReference
+            BuildableIdentifier = "primary"
+            BlueprintIdentifier = "97C146ED1CF9000F007C117D"
+            BuildableName = "Runner.app"
+            BlueprintName = "Runner"
+            ReferencedContainer = "container:Runner.xcodeproj">
+         </BuildableReference>
+      </BuildableProductRunnable>
+      <AdditionalOptions>
+      </AdditionalOptions>
+   </LaunchAction>
+   <ProfileAction
+      buildConfiguration = "Profile"
+      shouldUseLaunchSchemeArgsEnv = "YES"
+      savedToolIdentifier = ""
+      useCustomWorkingDirectory = "NO"
+      debugDocumentVersioning = "YES">
+      <BuildableProductRunnable
+         runnableDebuggingMode = "0">
+         <BuildableReference
+            BuildableIdentifier = "primary"
+            BlueprintIdentifier = "97C146ED1CF9000F007C117D"
+            BuildableName = "Runner.app"
+            BlueprintName = "Runner"
+            ReferencedContainer = "container:Runner.xcodeproj">
+         </BuildableReference>
+      </BuildableProductRunnable>
+   </ProfileAction>
+   <AnalyzeAction
+      buildConfiguration = "Debug">
+   </AnalyzeAction>
+   <ArchiveAction
+      buildConfiguration = "Release"
+      revealArchiveInOrganizer = "YES">
+   </ArchiveAction>
+</Scheme>

example/ios/Runner.xcworkspace/contents.xcworkspacedata

@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<Workspace
+   version = "1.0">
+   <FileRef
+      location = "group:Runner.xcodeproj">
+   </FileRef>
+   <FileRef
+      location = "group:Pods/Pods.xcodeproj">
+   </FileRef>
+</Workspace>

example/ios/Runner.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist

@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>IDEDidComputeMac32BitWarning</key>
+	<true/>
+</dict>
+</plist>

example/ios/Runner.xcworkspace/xcshareddata/WorkspaceSettings.xcsettings

@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>PreviewsEnabled</key>
+	<false/>
+</dict>
+</plist>

example/ios/Runner/AppDelegate.swift

@@ -0,0 +1,13 @@
+import UIKit
+import Flutter
+
+@UIApplicationMain
+@objc class AppDelegate: FlutterAppDelegate {
+  override func application(
+    _ application: UIApplication,
+    didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?
+  ) -> Bool {
+    GeneratedPluginRegistrant.register(with: self)
+    return super.application(application, didFinishLaunchingWithOptions: launchOptions)
+  }
+}

example/ios/Runner/Assets.xcassets/AppIcon.appiconset/Contents.json

@@ -0,0 +1,122 @@
+{
+  "images": [
+    {
+      "size": "20x20",
+      "idiom": "iphone",
+      "filename": "Icon-App-20x20@2x.png",
+      "scale": "2x"
+    },
+    {
+      "size": "20x20",
+      "idiom": "iphone",
+      "filename": "Icon-App-20x20@3x.png",
+      "scale": "3x"
+    },
+    {
+      "size": "29x29",
+      "idiom": "iphone",
+      "filename": "Icon-App-29x29@1x.png",
+      "scale": "1x"
+    },
+    {
+      "size": "29x29",
+      "idiom": "iphone",
+      "filename": "Icon-App-29x29@2x.png",
+      "scale": "2x"
+    },
+    {
+      "size": "29x29",
+      "idiom": "iphone",
+      "filename": "Icon-App-29x29@3x.png",
+      "scale": "3x"
+    },
+    {
+      "size": "40x40",
+      "idiom": "iphone",
+      "filename": "Icon-App-40x40@2x.png",
+      "scale": "2x"
+    },
+    {
+      "size": "40x40",
+      "idiom": "iphone",
+      "filename": "Icon-App-40x40@3x.png",
+      "scale": "3x"
+    },
+    {
+      "size": "60x60",
+      "idiom": "iphone",
+      "filename": "Icon-App-60x60@2x.png",
+      "scale": "2x"
+    },
+    {
+      "size": "60x60",
+      "idiom": "iphone",
+      "filename": "Icon-App-60x60@3x.png",
+      "scale": "3x"
+    },
+    {
+      "size": "20x20",
+      "idiom": "ipad",
+      "filename": "Icon-App-20x20@1x.png",
+      "scale": "1x"
+    },
+    {
+      "size": "20x20",
+      "idiom": "ipad",
+      "filename": "Icon-App-20x20@2x.png",
+      "scale": "2x"
+    },
+    {
+      "size": "29x29",
+      "idiom": "ipad",
+      "filename": "Icon-App-29x29@1x.png",
+      "scale": "1x"
+    },
+    {
+      "size": "29x29",
+      "idiom": "ipad",
+      "filename": "Icon-App-29x29@2x.png",
+      "scale": "2x"
+    },
+    {
+      "size": "40x40",
+      "idiom": "ipad",
+      "filename": "Icon-App-40x40@1x.png",
+      "scale": "1x"
+    },
+    {
+      "size": "40x40",
+      "idiom": "ipad",
+      "filename": "Icon-App-40x40@2x.png",
+      "scale": "2x"
+    },
+    {
+      "size": "76x76",
+      "idiom": "ipad",
+      "filename": "Icon-App-76x76@1x.png",
+      "scale": "1x"
+    },
+    {
+      "size": "76x76",
+      "idiom": "ipad",
+      "filename": "Icon-App-76x76@2x.png",
+      "scale": "2x"
+    },
+    {
+      "size": "83.5x83.5",
+      "idiom": "ipad",
+      "filename": "Icon-App-83.5x83.5@2x.png",
+      "scale": "2x"
+    },
+    {
+      "size": "1024x1024",
+      "idiom": "ios-marketing",
+      "filename": "Icon-App-1024x1024@1x.png",
+      "scale": "1x"
+    }
+  ],
+  "info": {
+    "version": 1,
+    "author": "xcode"
+  }
+}

example/ios/Runner/Assets.xcassets/LaunchImage.imageset/Contents.json

@@ -0,0 +1,23 @@
+{
+  "images": [
+    {
+      "idiom": "universal",
+      "filename": "LaunchImage.png",
+      "scale": "1x"
+    },
+    {
+      "idiom": "universal",
+      "filename": "LaunchImage@2x.png",
+      "scale": "2x"
+    },
+    {
+      "idiom": "universal",
+      "filename": "LaunchImage@3x.png",
+      "scale": "3x"
+    }
+  ],
+  "info": {
+    "version": 1,
+    "author": "xcode"
+  }
+}

example/ios/Runner/Assets.xcassets/LaunchImage.imageset/README.md

@@ -0,0 +1,5 @@
+# Launch Screen Assets
+
+You can customize the launch screen with your own desired assets by replacing the image files in this directory.
+
+You can also do it by opening your Flutter project's Xcode project with `open ios/Runner.xcworkspace`, selecting `Runner/Assets.xcassets` in the Project Navigator and dropping in the desired images.

example/ios/Runner/Base.lproj/LaunchScreen.storyboard

@@ -0,0 +1,37 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<document type="com.apple.InterfaceBuilder3.CocoaTouch.Storyboard.XIB" version="3.0" toolsVersion="12121" systemVersion="16G29" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" launchScreen="YES" colorMatched="YES" initialViewController="01J-lp-oVM">
+    <dependencies>
+        <deployment identifier="iOS"/>
+        <plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="12089"/>
+    </dependencies>
+    <scenes>
+        <!--View Controller-->
+        <scene sceneID="EHf-IW-A2E">
+            <objects>
+                <viewController id="01J-lp-oVM" sceneMemberID="viewController">
+                    <layoutGuides>
+                        <viewControllerLayoutGuide type="top" id="Ydg-fD-yQy"/>
+                        <viewControllerLayoutGuide type="bottom" id="xbc-2k-c8Z"/>
+                    </layoutGuides>
+                    <view key="view" contentMode="scaleToFill" id="Ze5-6b-2t3">
+                        <autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
+                        <subviews>
+                            <imageView opaque="NO" clipsSubviews="YES" multipleTouchEnabled="YES" contentMode="center" image="LaunchImage" translatesAutoresizingMaskIntoConstraints="NO" id="YRO-k0-Ey4">
+                            </imageView>
+                        </subviews>
+                        <color key="backgroundColor" red="1" green="1" blue="1" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
+                        <constraints>
+                            <constraint firstItem="YRO-k0-Ey4" firstAttribute="centerX" secondItem="Ze5-6b-2t3" secondAttribute="centerX" id="1a2-6s-vTC"/>
+                            <constraint firstItem="YRO-k0-Ey4" firstAttribute="centerY" secondItem="Ze5-6b-2t3" secondAttribute="centerY" id="4X2-HB-R7a"/>
+                        </constraints>
+                    </view>
+                </viewController>
+                <placeholder placeholderIdentifier="IBFirstResponder" id="iYj-Kq-Ea1" userLabel="First Responder" sceneMemberID="firstResponder"/>
+            </objects>
+            <point key="canvasLocation" x="53" y="375"/>
+        </scene>
+    </scenes>
+    <resources>
+        <image name="LaunchImage" width="168" height="185"/>
+    </resources>
+</document>

example/ios/Runner/Base.lproj/Main.storyboard

@@ -0,0 +1,26 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<document type="com.apple.InterfaceBuilder3.CocoaTouch.Storyboard.XIB" version="3.0" toolsVersion="10117" systemVersion="15F34" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" useTraitCollections="YES" initialViewController="BYZ-38-t0r">
+    <dependencies>
+        <deployment identifier="iOS"/>
+        <plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="10085"/>
+    </dependencies>
+    <scenes>
+        <!--Flutter View Controller-->
+        <scene sceneID="tne-QT-ifu">
+            <objects>
+                <viewController id="BYZ-38-t0r" customClass="FlutterViewController" sceneMemberID="viewController">
+                    <layoutGuides>
+                        <viewControllerLayoutGuide type="top" id="y3c-jy-aDJ"/>
+                        <viewControllerLayoutGuide type="bottom" id="wfy-db-euE"/>
+                    </layoutGuides>
+                    <view key="view" contentMode="scaleToFill" id="8bC-Xf-vdC">
+                        <rect key="frame" x="0.0" y="0.0" width="600" height="600"/>
+                        <autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
+                        <color key="backgroundColor" white="1" alpha="1" colorSpace="custom" customColorSpace="calibratedWhite"/>
+                    </view>
+                </viewController>
+                <placeholder placeholderIdentifier="IBFirstResponder" id="dkx-z0-nzr" sceneMemberID="firstResponder"/>
+            </objects>
+        </scene>
+    </scenes>
+</document>

example/ios/Runner/Info.plist

@@ -0,0 +1,47 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+  <key>NSPhotoLibraryUsageDescription</key>
+	<string></string>
+	<key>CFBundleDevelopmentRegion</key>
+	<string>$(DEVELOPMENT_LANGUAGE)</string>
+	<key>CFBundleExecutable</key>
+	<string>$(EXECUTABLE_NAME)</string>
+	<key>CFBundleIdentifier</key>
+	<string>$(PRODUCT_BUNDLE_IDENTIFIER)</string>
+	<key>CFBundleInfoDictionaryVersion</key>
+	<string>6.0</string>
+	<key>CFBundleName</key>
+	<string>photo_gallery_example</string>
+	<key>CFBundlePackageType</key>
+	<string>APPL</string>
+	<key>CFBundleShortVersionString</key>
+	<string>$(FLUTTER_BUILD_NAME)</string>
+	<key>CFBundleSignature</key>
+	<string>????</string>
+	<key>CFBundleVersion</key>
+	<string>$(FLUTTER_BUILD_NUMBER)</string>
+	<key>LSRequiresIPhoneOS</key>
+	<true/>
+	<key>UILaunchStoryboardName</key>
+	<string>LaunchScreen</string>
+	<key>UIMainStoryboardFile</key>
+	<string>Main</string>
+	<key>UISupportedInterfaceOrientations</key>
+	<array>
+		<string>UIInterfaceOrientationPortrait</string>
+		<string>UIInterfaceOrientationLandscapeLeft</string>
+		<string>UIInterfaceOrientationLandscapeRight</string>
+	</array>
+	<key>UISupportedInterfaceOrientations~ipad</key>
+	<array>
+		<string>UIInterfaceOrientationPortrait</string>
+		<string>UIInterfaceOrientationPortraitUpsideDown</string>
+		<string>UIInterfaceOrientationLandscapeLeft</string>
+		<string>UIInterfaceOrientationLandscapeRight</string>
+	</array>
+	<key>UIViewControllerBasedStatusBarAppearance</key>
+	<false/>
+</dict>
+</plist>

example/ios/Runner/Runner-Bridging-Header.h

@@ -0,0 +1 @@
+#import "GeneratedPluginRegistrant.h"

example/lib/main.dart

@@ -0,0 +1,235 @@
+import 'dart:async';
+import 'dart:io';
+
+import 'package:flutter/material.dart';
+import 'package:flutter/rendering.dart';
+import 'package:permission_handler/permission_handler.dart';
+import 'package:photo_gallery/photo_gallery.dart';
+import 'package:transparent_image/transparent_image.dart';
+
+void main() {
+  runApp(MyApp());
+}
+
+class MyApp extends StatefulWidget {
+  @override
+  _MyAppState createState() => _MyAppState();
+}
+
+class _MyAppState extends State<MyApp> {
+  List _collections;
+  bool _loading = false;
+
+  @override
+  void initState() {
+    super.initState();
+    _loading = true;
+    initAsync();
+  }
+
+  Future<void> initAsync() async {
+    if (await _promptPermissionSetting()) {
+      List<Album> collections =
+          await PhotoGallery.listAlbums(mediumType: MediumType.image);
+      setState(() {
+        _collections = collections;
+        _loading = false;
+      });
+    }
+    setState(() {
+      _loading = false;
+    });
+  }
+
+  Future<bool> _promptPermissionSetting() async {
+    if (Platform.isIOS &&
+            await Permission.storage.request().isGranted &&
+            await Permission.photos.request().isGranted ||
+        Platform.isAndroid && await Permission.storage.request().isGranted) {
+      return true;
+    }
+    return false;
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    return MaterialApp(
+      home: Scaffold(
+        appBar: AppBar(
+          title: const Text('Photo gallery example'),
+        ),
+        body: _loading
+            ? Center(
+                child: CircularProgressIndicator(),
+              )
+            : LayoutBuilder(
+                builder: (context, constraints) {
+                  double gridWidth = (constraints.maxWidth - 20) / 3;
+                  double gridHeight = gridWidth + 33;
+                  double ratio = gridWidth / gridHeight;
+                  return Container(
+                    padding: EdgeInsets.all(5),
+                    child: GridView.count(
+                      childAspectRatio: ratio,
+                      crossAxisCount: 3,
+                      mainAxisSpacing: 5.0,
+                      crossAxisSpacing: 5.0,
+                      children: <Widget>[
+                        ...?_collections?.map(
+                          (collection) => GestureDetector(
+                            onTap: () => Navigator.of(context).push(
+                                MaterialPageRoute(
+                                    builder: (context) =>
+                                        CollectionPage(collection))),
+                            child: Column(
+                              children: <Widget>[
+                                ClipRRect(
+                                  borderRadius: BorderRadius.circular(5.0),
+                                  child: Container(
+                                    color: Colors.grey[300],
+                                    height: gridWidth,
+                                    width: gridWidth,
+                                    child: FadeInImage(
+                                      fit: BoxFit.cover,
+                                      placeholder:
+                                          MemoryImage(kTransparentImage),
+                                      image: AlbumThumbnailProvider(
+                                        albumId: collection.id,
+                                        highQuality: true,
+                                      ),
+                                    ),
+                                  ),
+                                ),
+                                Container(
+                                  alignment: Alignment.topLeft,
+                                  padding: EdgeInsets.only(left: 2.0),
+                                  child: Text(
+                                    collection.name,
+                                    maxLines: 1,
+                                    textAlign: TextAlign.start,
+                                    style: TextStyle(
+                                      height: 1.2,
+                                      fontSize: 16,
+                                    ),
+                                  ),
+                                ),
+                                Container(
+                                  alignment: Alignment.topLeft,
+                                  padding: EdgeInsets.only(left: 2.0),
+                                  child: Text(
+                                    collection.count.toString(),
+                                    textAlign: TextAlign.start,
+                                    style: TextStyle(
+                                      height: 1.2,
+                                      fontSize: 12,
+                                    ),
+                                  ),
+                                ),
+                              ],
+                            ),
+                          ),
+                        ),
+                      ],
+                    ),
+                  );
+                },
+              ),
+      ),
+    );
+  }
+}
+
+class CollectionPage extends StatefulWidget {
+  final Album collection;
+
+  CollectionPage(Album collection) : collection = collection;
+
+  @override
+  State<StatefulWidget> createState() => CollectionPageState();
+}
+
+class CollectionPageState extends State<CollectionPage> {
+  List<Medium> _media;
+
+  @override
+  void initState() {
+    super.initState();
+    initAsync();
+  }
+
+  void initAsync() async {
+    MediaPage mediaPage = await widget.collection.listMedia();
+    setState(() {
+      _media = mediaPage.items;
+    });
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    return MaterialApp(
+      home: Scaffold(
+        appBar: AppBar(
+          leading: IconButton(
+            icon: Icon(Icons.arrow_back_ios),
+            onPressed: () => Navigator.of(context).pop(),
+          ),
+          title: Text(widget.collection.name),
+        ),
+        body: GridView.count(
+          crossAxisCount: 3,
+          mainAxisSpacing: 1.0,
+          crossAxisSpacing: 1.0,
+          children: <Widget>[
+            ...?_media?.map(
+              (media) => GestureDetector(
+                onTap: () => Navigator.of(context).push(
+                    MaterialPageRoute(builder: (context) => ViewerPage(media))),
+                child: Container(
+                  color: Colors.grey[300],
+                  child: FadeInImage(
+                    fit: BoxFit.cover,
+                    placeholder: MemoryImage(kTransparentImage),
+                    image: ThumbnailProvider(
+                      mediumId: media.id,
+                      highQuality: true,
+                    ),
+                  ),
+                ),
+              ),
+            ),
+          ],
+        ),
+      ),
+    );
+  }
+}
+
+class ViewerPage extends StatelessWidget {
+  final Medium media;
+
+  ViewerPage(Medium media) : media = media;
+
+  @override
+  Widget build(BuildContext context) {
+    DateTime date = media.creationDate ?? media.modifiedDate;
+    return MaterialApp(
+      home: Scaffold(
+        appBar: AppBar(
+          leading: IconButton(
+            onPressed: () => Navigator.of(context).pop(),
+            icon: Icon(Icons.arrow_back_ios),
+          ),
+          title: Text(date?.toLocal().toString()),
+        ),
+        body: Container(
+          alignment: Alignment.center,
+          child: FadeInImage(
+            fit: BoxFit.cover,
+            placeholder: MemoryImage(kTransparentImage),
+            image: PhotoProvider(mediumId: media.id),
+          ),
+        ),
+      ),
+    );
+  }
+}

example/pubspec.lock

@@ -0,0 +1,224 @@
+# Generated by pub
+# See https://dart.dev/tools/pub/glossary#lockfile
+packages:
+  archive:
+    dependency: transitive
+    description:
+      name: archive
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.0.13"
+  args:
+    dependency: transitive
+    description:
+      name: args
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.6.0"
+  async:
+    dependency: transitive
+    description:
+      name: async
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.4.1"
+  boolean_selector:
+    dependency: transitive
+    description:
+      name: boolean_selector
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.0.0"
+  charcode:
+    dependency: transitive
+    description:
+      name: charcode
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.1.3"
+  collection:
+    dependency: transitive
+    description:
+      name: collection
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.14.12"
+  convert:
+    dependency: transitive
+    description:
+      name: convert
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.1.1"
+  crypto:
+    dependency: transitive
+    description:
+      name: crypto
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.1.4"
+  cupertino_icons:
+    dependency: "direct main"
+    description:
+      name: cupertino_icons
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "0.1.3"
+  flutter:
+    dependency: "direct main"
+    description: flutter
+    source: sdk
+    version: "0.0.0"
+  flutter_test:
+    dependency: "direct dev"
+    description: flutter
+    source: sdk
+    version: "0.0.0"
+  image:
+    dependency: transitive
+    description:
+      name: image
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.1.12"
+  matcher:
+    dependency: transitive
+    description:
+      name: matcher
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "0.12.6"
+  meta:
+    dependency: transitive
+    description:
+      name: meta
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.1.8"
+  path:
+    dependency: transitive
+    description:
+      name: path
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.6.4"
+  permission_handler:
+    dependency: "direct main"
+    description:
+      name: permission_handler
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "5.0.1+1"
+  permission_handler_platform_interface:
+    dependency: transitive
+    description:
+      name: permission_handler_platform_interface
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.0.1"
+  petitparser:
+    dependency: transitive
+    description:
+      name: petitparser
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.4.0"
+  photo_gallery:
+    dependency: "direct main"
+    description:
+      path: ".."
+      relative: true
+    source: path
+    version: "0.1.0+1"
+  plugin_platform_interface:
+    dependency: transitive
+    description:
+      name: plugin_platform_interface
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.0.2"
+  quiver:
+    dependency: transitive
+    description:
+      name: quiver
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.1.3"
+  sky_engine:
+    dependency: transitive
+    description: flutter
+    source: sdk
+    version: "0.0.99"
+  source_span:
+    dependency: transitive
+    description:
+      name: source_span
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.7.0"
+  stack_trace:
+    dependency: transitive
+    description:
+      name: stack_trace
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.9.3"
+  stream_channel:
+    dependency: transitive
+    description:
+      name: stream_channel
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.0.0"
+  string_scanner:
+    dependency: transitive
+    description:
+      name: string_scanner
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.0.5"
+  term_glyph:
+    dependency: transitive
+    description:
+      name: term_glyph
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.1.0"
+  test_api:
+    dependency: transitive
+    description:
+      name: test_api
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "0.2.15"
+  transparent_image:
+    dependency: "direct main"
+    description:
+      name: transparent_image
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.0.0"
+  typed_data:
+    dependency: transitive
+    description:
+      name: typed_data
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.1.6"
+  vector_math:
+    dependency: transitive
+    description:
+      name: vector_math
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.0.8"
+  xml:
+    dependency: transitive
+    description:
+      name: xml
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "3.6.1"
+sdks:
+  dart: ">=2.7.0 <3.0.0"
+  flutter: ">=1.12.8 <2.0.0"

example/pubspec.yaml

@@ -0,0 +1,73 @@
+name: photo_gallery_example
+description: Demonstrates how to use the photo_gallery plugin.
+
+# The following line prevents the package from being accidentally published to
+# pub.dev using `pub publish`. This is preferred for private packages.
+publish_to: 'none' # Remove this line if you wish to publish to pub.dev
+
+environment:
+  sdk: ">=2.7.0 <3.0.0"
+
+dependencies:
+  flutter:
+    sdk: flutter
+
+  photo_gallery:
+    # When depending on this package from a real application you should use:
+    #   photo_gallery: ^x.y.z
+    # See https://dart.dev/tools/pub/dependencies#version-constraints
+    # The example app is bundled with the plugin so we use a path dependency on
+    # the parent directory to use the current plugin's version. 
+    path: ../
+
+  # The following adds the Cupertino Icons font to your application.
+  # Use with the CupertinoIcons class for iOS style icons.
+  cupertino_icons: ^0.1.3
+  transparent_image: ^1.0.0
+  permission_handler: ^5.0.1+1
+
+dev_dependencies:
+  flutter_test:
+    sdk: flutter
+
+# For information on the generic Dart part of this file, see the
+# following page: https://dart.dev/tools/pub/pubspec
+
+# The following section is specific to Flutter.
+flutter:
+
+  # The following line ensures that the Material Icons font is
+  # included with your application, so that you can use the icons in
+  # the material Icons class.
+  uses-material-design: true
+
+  # To add assets to your application, add an assets section, like this:
+  # assets:
+  #   - images/a_dot_burr.jpeg
+  #   - images/a_dot_ham.jpeg
+
+  # An image asset can refer to one or more resolution-specific "variants", see
+  # https://flutter.dev/assets-and-images/#resolution-aware.
+
+  # For details regarding adding assets from package dependencies, see
+  # https://flutter.dev/assets-and-images/#from-packages
+
+  # To add custom fonts to your application, add a fonts section here,
+  # in this "flutter" section. Each entry in this list should have a
+  # "family" key with the font family name, and a "fonts" key with a
+  # list giving the asset and other descriptors for the font. For
+  # example:
+  # fonts:
+  #   - family: Schyler
+  #     fonts:
+  #       - asset: fonts/Schyler-Regular.ttf
+  #       - asset: fonts/Schyler-Italic.ttf
+  #         style: italic
+  #   - family: Trajan Pro
+  #     fonts:
+  #       - asset: fonts/TrajanPro.ttf
+  #       - asset: fonts/TrajanPro_Bold.ttf
+  #         weight: 700
+  #
+  # For details regarding fonts from package dependencies,
+  # see https://flutter.dev/custom-fonts/#from-packages

ios/.gitignore

@@ -0,0 +1,37 @@
+.idea/
+.vagrant/
+.sconsign.dblite
+.svn/
+
+.DS_Store
+*.swp
+profile
+
+DerivedData/
+build/
+GeneratedPluginRegistrant.h
+GeneratedPluginRegistrant.m
+
+.generated/
+
+*.pbxuser
+*.mode1v3
+*.mode2v3
+*.perspectivev3
+
+!default.pbxuser
+!default.mode1v3
+!default.mode2v3
+!default.perspectivev3
+
+xcuserdata
+
+*.moved-aside
+
+*.pyc
+*sync/
+Icon?
+.tags*
+
+/Flutter/Generated.xcconfig
+/Flutter/flutter_export_environment.sh

ios/Classes/PhotoGalleryPlugin.h

@@ -0,0 +1,4 @@
+#import <Flutter/Flutter.h>
+
+@interface PhotoGalleryPlugin : NSObject<FlutterPlugin>
+@end

ios/Classes/PhotoGalleryPlugin.m

@@ -0,0 +1,15 @@
+#import "PhotoGalleryPlugin.h"
+#if __has_include(<photo_gallery/photo_gallery-Swift.h>)
+#import <photo_gallery/photo_gallery-Swift.h>
+#else
+// Support project import fallback if the generated compatibility header
+// is not copied when this plugin is created as a library.
+// https://forums.swift.org/t/swift-static-libraries-dont-copy-generated-objective-c-header/19816
+#import "photo_gallery-Swift.h"
+#endif
+
+@implementation PhotoGalleryPlugin
++ (void)registerWithRegistrar:(NSObject<FlutterPluginRegistrar>*)registrar {
+  [SwiftPhotoGalleryPlugin registerWithRegistrar:registrar];
+}
+@end

ios/Classes/SwiftPhotoGalleryPlugin.swift

@@ -0,0 +1,440 @@
+import Foundation
+import MobileCoreServices
+import Flutter
+import UIKit
+import Photos
+
+public class SwiftPhotoGalleryPlugin: NSObject, FlutterPlugin {
+  public static func register(with registrar: FlutterPluginRegistrar) {
+    let channel = FlutterMethodChannel(name: "photo_gallery", binaryMessenger: registrar.messenger())
+    let instance = SwiftPhotoGalleryPlugin()
+    registrar.addMethodCallDelegate(instance, channel: channel)
+  }
+  
+  public func handle(_ call: FlutterMethodCall, result: @escaping FlutterResult) {
+    if(call.method == "listAlbums") {
+      let arguments = call.arguments as! Dictionary<String, AnyObject>
+      let mediumType = arguments["mediumType"] as! String
+      result(listAlbums(mediumType: mediumType))
+    }
+    else if(call.method == "listMedia") {
+      let arguments = call.arguments as! Dictionary<String, AnyObject>
+      let albumId = arguments["albumId"] as! String
+      let mediumType = arguments["mediumType"] as! String
+      let skip = arguments["skip"] as? NSNumber
+      let take = arguments["take"] as? NSNumber
+      result(listMedia(albumId: albumId, skip: skip, take: take, mediumType: mediumType))
+    }
+    else if(call.method == "getMedium") {
+      let arguments = call.arguments as! Dictionary<String, AnyObject>
+      let mediumId = arguments["mediumId"] as! String
+      getMedium(
+        mediumId: mediumId,
+        completion: { (data: [String: Any?]?, error: Error?) -> Void in
+          result(data)
+      })
+    }
+    else if(call.method == "getThumbnail") {
+      let arguments = call.arguments as! Dictionary<String, AnyObject>
+      let mediumId = arguments["mediumId"] as! String
+      let width = arguments["width"] as? NSNumber
+      let height = arguments["height"] as? NSNumber
+      let highQuality = arguments["highQuality"] as? Bool
+      getThumbnail(
+        mediumId: mediumId,
+        width: width,
+        height: height,
+        highQuality: highQuality,
+        completion: { (data: Data?, error: Error?) -> Void in
+          result(data)
+      })
+    }
+    else if(call.method == "getAlbumThumbnail") {
+      let arguments = call.arguments as! Dictionary<String, AnyObject>
+      let albumId = arguments["albumId"] as! String
+      let width = arguments["width"] as? Int
+      let height = arguments["height"] as? Int
+      let highQuality = arguments["highQuality"] as? Bool
+      getAlbumThumbnail(
+        albumId: albumId,
+        width: width,
+        height: height,
+        highQuality: highQuality,
+        completion: { (data: Data?, error: Error?) -> Void in
+          result(data)
+      })
+    }
+    else if(call.method == "getFile") {
+      let arguments = call.arguments as! Dictionary<String, AnyObject>
+      let mediumId = arguments["mediumId"] as! String
+      getFile(
+        mediumId: mediumId,
+        completion: { (filepath: String?, error: Error?) -> Void in
+          result(filepath?.replacingOccurrences(of: "file://", with: ""))
+      })
+    }
+    else {
+      result(FlutterMethodNotImplemented)
+    }
+  }
+  
+  private var assetCollections : [PHAssetCollection]  = []
+  
+  private func listAlbums(mediumType: String) -> [NSDictionary] {
+    self.assetCollections = []
+    let fetchOptions = PHFetchOptions()
+    var total = 0
+    var albums = [NSDictionary]()
+    var albumIds = Set<String>()
+    
+    func addCollection (collection: PHAssetCollection, hideIfEmpty: Bool) -> Void {
+      let kRecentlyDeletedCollectionSubtype = PHAssetCollectionSubtype(rawValue: 1000000201)
+      guard collection.assetCollectionSubtype != kRecentlyDeletedCollectionSubtype else { return }
+      
+      // De-duplicate by id.
+      let albumId = collection.localIdentifier
+      guard !albumIds.contains(albumId) else { return }
+      albumIds.insert(albumId)
+      
+      let options = PHFetchOptions()
+      options.predicate = self.predicateFromMediumType(mediumType: mediumType)
+      if #available(iOS 9, *) {
+        fetchOptions.fetchLimit = 1
+      }
+      let count = PHAsset.fetchAssets(in: collection, options: options).count
+      if(count > 0 || !hideIfEmpty) {
+        total+=count
+        self.assetCollections.append(collection)
+        albums.append([
+          "id": collection.localIdentifier,
+          "mediumType": mediumType,
+          "name": collection.localizedTitle ?? "Unknown",
+          "count": count,
+        ])
+      }
+    }
+    
+    func processPHAssetCollections(fetchResult: PHFetchResult<PHAssetCollection>, hideIfEmpty: Bool) -> Void {
+      fetchResult.enumerateObjects { (assetCollection, _, _) in
+        addCollection(collection: assetCollection, hideIfEmpty: hideIfEmpty)
+      }
+    }
+    
+    func processPHCollections (fetchResult: PHFetchResult<PHCollection>, hideIfEmpty: Bool) -> Void {
+      fetchResult.enumerateObjects { (collection, _, _) in
+        if let assetCollection = collection as? PHAssetCollection {
+          addCollection(collection: assetCollection, hideIfEmpty: hideIfEmpty)
+        } else if let collectionList = collection as? PHCollectionList {
+          processPHCollections(fetchResult: PHCollectionList.fetchCollections(in: collectionList, options: nil), hideIfEmpty: hideIfEmpty)
+        }
+      }
+    }
+    
+    // Smart Albums.
+    processPHAssetCollections(
+      fetchResult: PHAssetCollection.fetchAssetCollections(with: .smartAlbum, subtype: .albumRegular, options: fetchOptions),
+      hideIfEmpty: true
+    )
+    
+    // User-created collections.
+    processPHCollections(
+      fetchResult: PHAssetCollection.fetchTopLevelUserCollections(with: fetchOptions),
+      hideIfEmpty: true
+    )
+    
+    albums.insert([
+      "id": "__ALL__",
+      "mediumType": mediumType,
+      "name": "All",
+      "count" : countMedia(collection: nil, mediumTypes: [mediumType]),
+    ], at: 0)
+    
+    return albums
+  }
+  
+  private func countMedia(collection: PHAssetCollection?, mediumTypes: [String]) -> Int {
+    let options = PHFetchOptions()
+    options.predicate = self.predicateFromMediumTypes(mediumTypes: mediumTypes)
+    if(collection == nil) {
+      return PHAsset.fetchAssets(with: options).count
+    }
+    
+    return PHAsset.fetchAssets(in: collection!, options: options).count
+  }
+  
+  private func listMedia(albumId: String, skip: NSNumber?, take: NSNumber?, mediumType: String) -> NSDictionary {
+    let fetchOptions = PHFetchOptions()
+    fetchOptions.sortDescriptors = [NSSortDescriptor(key: "creationDate", ascending: false)]
+    fetchOptions.predicate = predicateFromMediumType(mediumType: mediumType)
+    
+    let collection = self.assetCollections.first(where: { (collection) -> Bool in
+      collection.localIdentifier == albumId
+    })
+    
+    let fetchResult = albumId == "__ALL__"
+      ? PHAsset.fetchAssets(with: fetchOptions)
+      : PHAsset.fetchAssets(in: collection!, options: fetchOptions)
+    let start = skip?.intValue ?? 0
+    let total = fetchResult.count
+    let end = take == nil ? total : min(start + take!.intValue, total)
+    var items = [[String: Any?]]()
+    for index in start..<end {
+      let asset = fetchResult.object(at: index) as PHAsset
+      items.append(getMediumFromAsset(asset: asset))
+    }
+    
+    return [
+      "start": start,
+      "total": total,
+      "items": items,
+    ]
+  }
+  
+  private func getMedium(mediumId: String, completion: @escaping ([String : Any?]?, Error?) -> Void) {
+    let fetchOptions = PHFetchOptions()
+    if #available(iOS 9, *) {
+      fetchOptions.fetchLimit = 1
+    }
+    let assets: PHFetchResult = PHAsset.fetchAssets(withLocalIdentifiers: [mediumId], options: fetchOptions)
+    
+    if (assets.count > 0) {
+      let asset: PHAsset = assets[0]
+      completion(getMediumFromAsset(asset: asset), nil)
+      return
+    }
+    
+    completion(nil, NSError(domain: "photo_gallery", code: 404, userInfo: nil))
+  }
+  
+  private func getThumbnail(
+    mediumId: String,
+    width: NSNumber?,
+    height: NSNumber?,
+    highQuality: Bool?,
+    completion: @escaping (Data?, Error?) -> Void
+  ) {
+    let manager = PHImageManager.default()
+    let fetchOptions = PHFetchOptions()
+    if #available(iOS 9, *) {
+      fetchOptions.fetchLimit = 1
+    }
+    let assets: PHFetchResult = PHAsset.fetchAssets(withLocalIdentifiers: [mediumId], options: fetchOptions)
+    
+    if (assets.count > 0) {
+      let asset: PHAsset = assets[0]
+      
+      let options = PHImageRequestOptions()
+      options.deliveryMode = (highQuality ?? false)
+        ? PHImageRequestOptionsDeliveryMode.highQualityFormat
+        : PHImageRequestOptionsDeliveryMode.fastFormat
+      options.isSynchronous = false
+      options.isNetworkAccessAllowed = true
+      options.version = .current
+      
+      let imageSize = CGSize(width: width?.intValue ?? 128, height: height?.intValue ?? 128)
+      manager.requestImage(
+        for: asset,
+        targetSize: CGSize(width: imageSize.width *  UIScreen.main.scale, height: imageSize.height *  UIScreen.main.scale),
+        contentMode: PHImageContentMode.aspectFill,
+        options: options,
+        resultHandler: {(uiImage: UIImage?, info) in
+          guard let image = uiImage else {
+            completion(nil , NSError(domain: "photo_gallery", code: 404, userInfo: nil))
+            return
+          }
+          let bytes = image.jpegData(compressionQuality: CGFloat(70))
+          completion(bytes, nil)
+      })
+      return
+    }
+    
+    completion(nil , NSError(domain: "photo_gallery", code: 404, userInfo: nil))
+  }
+  
+  private func getAlbumThumbnail(
+    albumId: String,
+    width: Int?,
+    height: Int?,
+    highQuality: Bool?,
+    completion: @escaping (Data?, Error?) -> Void
+  ) {
+    let manager = PHImageManager.default()
+    let fetchOptions = PHFetchOptions()
+    fetchOptions.sortDescriptors = [NSSortDescriptor(key: "creationDate", ascending: false)]
+    if #available(iOS 9, *) {
+      fetchOptions.fetchLimit = 1
+    }
+    
+    let assets = albumId == "__ALL__" ?
+      PHAsset.fetchAssets(with: fetchOptions) :
+      PHAsset.fetchAssets(in: self.assetCollections.first(where: { (collection) -> Bool in
+        collection.localIdentifier == albumId
+      })!, options: fetchOptions)
+    
+    if (assets.count > 0) {
+      let asset: PHAsset = assets[0]
+      
+      let options = PHImageRequestOptions()
+      options.deliveryMode = (highQuality ?? false)
+        ? PHImageRequestOptionsDeliveryMode.highQualityFormat
+        : PHImageRequestOptionsDeliveryMode.fastFormat
+      options.isSynchronous = false
+      options.isNetworkAccessAllowed = true
+      options.version = .current
+      
+      let imageSize = CGSize(width: width ?? 128, height: height ?? 128)
+      manager.requestImage(
+        for: asset,
+        targetSize: CGSize(
+          width: imageSize.width *  UIScreen.main.scale,
+          height: imageSize.height *  UIScreen.main.scale
+        ),
+        contentMode: PHImageContentMode.aspectFill,
+        options: options,
+        resultHandler: {(uiImage: UIImage?, info) in
+          guard let image = uiImage else {
+            completion(nil , NSError(domain: "photo_gallery", code: 404, userInfo: nil))
+            return
+          }
+          let bytes = image.jpegData(compressionQuality: CGFloat(80))
+          completion(bytes, nil)
+      })
+      return
+    }
+    
+    completion(nil , NSError(domain: "photo_gallery", code: 404, userInfo: nil))
+  }
+  
+  private func getFile(mediumId: String, completion: @escaping (String?, Error?) -> Void) {
+    let manager = PHImageManager.default()
+    
+    let fetchOptions = PHFetchOptions()
+    if #available(iOS 9, *) {
+      fetchOptions.fetchLimit = 1
+    }
+    let assets: PHFetchResult = PHAsset.fetchAssets(withLocalIdentifiers: [mediumId], options: fetchOptions)
+    
+    if (assets.count > 0) {
+      let asset: PHAsset = assets[0]
+      if(asset.mediaType == PHAssetMediaType.image) {
+        let options = PHImageRequestOptions()
+        options.deliveryMode = PHImageRequestOptionsDeliveryMode.highQualityFormat
+        options.isSynchronous = false
+        options.isNetworkAccessAllowed = true
+        options.version = .current
+        
+        manager.requestImageData(
+          for: asset,
+          options: options,
+          resultHandler: { (data: Data?, uti: String?, orientation, info) in
+            DispatchQueue.main.async(execute: {
+              guard let originalData = data else {
+                completion(nil, NSError(domain: "photo_gallery", code: 404, userInfo: nil))
+                return
+              }
+              guard let jpgData = self.convertToJpeg(originalData: originalData) else {
+                completion(nil, NSError(domain: "photo_gallery", code: 500, userInfo: nil))
+                return
+              }
+              // Writing to file
+              let filepath = self.exportPathForAsset(asset: asset, ext: ".jpg")
+              try! jpgData.write(to: filepath, options: .atomic)
+              completion(filepath.absoluteString, nil)
+            })
+        })
+      } else if(asset.mediaType == PHAssetMediaType.video
+        || asset.mediaType == PHAssetMediaType.audio) {
+        let options = PHVideoRequestOptions()
+        options.isNetworkAccessAllowed = true
+        options.version = .current
+        
+        manager.requestAVAsset(forVideo: asset, options: options, resultHandler: { (avAsset, avAudioMix, info) in
+          DispatchQueue.main.async(execute: {
+            do {
+              let avAsset = avAsset as? AVURLAsset
+              let data = try Data(contentsOf: avAsset!.url)
+              let filepath = self.exportPathForAsset(asset: asset, ext: ".mov")
+              try! data.write(to: filepath, options: .atomic)
+              completion(filepath.absoluteString, nil)
+            } catch {
+              completion(nil, NSError(domain: "photo_gallery", code: 500, userInfo: nil))
+            }
+          })
+        })
+      }
+    }
+  }
+  
+  private func getMediumFromAsset(asset: PHAsset) -> [String: Any?] {
+    return [
+      "id": asset.localIdentifier,
+      "mediumType": toDartMediumType(value: asset.mediaType),
+      "height": asset.pixelHeight,
+      "width": asset.pixelWidth,
+      "creationDate": (asset.creationDate != nil) ? NSInteger(asset.creationDate!.timeIntervalSince1970) * 1000 : nil,
+      "modifiedDate": (asset.modificationDate != nil) ? NSInteger(asset.modificationDate!.timeIntervalSince1970) * 1000 : nil
+    ]
+  }
+  
+  /// Converts to JPEG, and keep EXIF data.
+  private func convertToJpeg(originalData: Data) -> Data? {
+    guard let image: UIImage = UIImage(data: originalData) else { return nil }
+    
+    let originalSrc = CGImageSourceCreateWithData(originalData as CFData, nil)!
+    let options = [kCGImageSourceShouldCache as String: kCFBooleanFalse]
+    let originalMetadata = CGImageSourceCopyPropertiesAtIndex(originalSrc, 0, options as CFDictionary)
+    
+    guard let jpeg = image.jpegData(compressionQuality: 1.0) else { return nil }
+    
+    let src = CGImageSourceCreateWithData(jpeg as CFData, nil)!
+    let data = NSMutableData()
+    let uti = CGImageSourceGetType(src)!
+    let dest = CGImageDestinationCreateWithData(data as CFMutableData, uti, 1, nil)!
+    CGImageDestinationAddImageFromSource(dest, src, 0, originalMetadata)
+    if !CGImageDestinationFinalize(dest) { return nil }
+    
+    return data as Data
+  }
+  
+  
+  private func exportPathForAsset(asset: PHAsset, ext: String) -> URL {
+    let mediumId = asset.localIdentifier
+      .replacingOccurrences(of: "/", with: "__")
+      .replacingOccurrences(of: "\\", with: "__")
+    let paths = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask)
+    let tempFolder = paths[0].appendingPathComponent("photo_gallery")
+    try! FileManager.default.createDirectory(at: tempFolder, withIntermediateDirectories: true, attributes: nil)
+    
+    return paths[0].appendingPathComponent(mediumId+ext)
+  }
+  
+  private func toSwiftMediumType(value: String) -> PHAssetMediaType? {
+    switch value {
+    case "image": return PHAssetMediaType.image
+    case "video": return PHAssetMediaType.video
+    case "audio": return PHAssetMediaType.audio
+    default: return nil
+    }
+  }
+  
+  private func toDartMediumType(value: PHAssetMediaType) -> String? {
+    switch value {
+    case PHAssetMediaType.image: return "image"
+    case PHAssetMediaType.video: return "video"
+    case PHAssetMediaType.audio: return "audio"
+    default: return nil
+    }
+  }
+  
+  private func predicateFromMediumTypes(mediumTypes: [String]) -> NSPredicate {
+    let predicates = mediumTypes.map { (dartValue) -> NSPredicate in
+      return predicateFromMediumType(mediumType: dartValue)
+    }
+    return NSCompoundPredicate(type: NSCompoundPredicate.LogicalType.or, subpredicates: predicates)
+  }
+  
+  private func predicateFromMediumType(mediumType: String) -> NSPredicate {
+    let swiftType = toSwiftMediumType(value: mediumType)
+    return NSPredicate(format: "mediaType = %d", swiftType!.rawValue)
+  }
+}

ios/photo_gallery.podspec

@@ -0,0 +1,23 @@
+#
+# To learn more about a Podspec see http://guides.cocoapods.org/syntax/podspec.html.
+# Run `pod lib lint photo_gallery.podspec' to validate before publishing.
+#
+Pod::Spec.new do |s|
+  s.name             = 'photo_gallery'
+  s.version          = '0.0.1'
+  s.summary          = 'A Flutter plugin that retrieves images and videos from mobile native gallery.'
+  s.description      = <<-DESC
+A Flutter plugin that retrieves images and videos from mobile native gallery.
+                       DESC
+  s.homepage         = 'http://example.com'
+  s.license          = { :file => '../LICENSE' }
+  s.author           = { 'Your Company' => 'email@example.com' }
+  s.source           = { :path => '.' }
+  s.source_files = 'Classes/**/*'
+  s.dependency 'Flutter'
+  s.platform = :ios, '8.0'
+
+  # Flutter.framework does not contain a i386 slice. Only x86_64 simulators are supported.
+  s.pod_target_xcconfig = { 'DEFINES_MODULE' => 'YES', 'VALID_ARCHS[sdk=iphonesimulator*]' => 'x86_64' }
+  s.swift_version = '5.0'
+end

lib/photo_gallery.dart

@@ -0,0 +1,112 @@
+library photogallery;
+
+import 'dart:async';
+import 'dart:io';
+import 'dart:ui' as ui;
+
+import 'package:flutter/foundation.dart';
+import 'package:flutter/painting.dart';
+import 'package:flutter/services.dart';
+import 'package:flutter/widgets.dart';
+import 'package:transparent_image/transparent_image.dart';
+
+part 'src/common/medium_type.dart';
+part 'src/image_providers/album_thumbnail_provider.dart';
+part 'src/image_providers/photo_provider.dart';
+part 'src/image_providers/thumbnail_provider.dart';
+part 'src/models/album.dart';
+part 'src/models/media_page.dart';
+part 'src/models/medium.dart';
+
+/// Accessing the native photo gallery.
+class PhotoGallery {
+  static const MethodChannel _channel = const MethodChannel('photo_gallery');
+
+  /// List all available photo gallery albums and counts number of
+  /// items of [MediumType].
+  static Future<List<Album>> listAlbums({
+    @required MediumType mediumType,
+  }) async {
+    assert(mediumType != null);
+    final json = await _channel.invokeMethod('listAlbums', {
+      'mediumType': mediumTypeToJson(mediumType),
+    });
+    return json.map<Album>((x) => Album.fromJson(x)).toList();
+  }
+
+  static Future<MediaPage> _listMedia({
+    @required Album album,
+    @required MediumType mediumType,
+    @required int total,
+    int skip,
+    int take,
+  }) async {
+    assert(album.id != null);
+    final json = await _channel.invokeMethod('listMedia', {
+      'albumId': album.id,
+      'mediumType': mediumTypeToJson(mediumType),
+      'total': total,
+      'skip': skip,
+      'take': take,
+    });
+    return MediaPage.fromJson(album, mediumType, json);
+  }
+
+  static Future<Medium> getMedium({
+    @required String mediumId,
+    MediumType mediumType,
+  }) async {
+    assert(mediumId != null);
+    final json = await _channel.invokeMethod('getMedium', {
+      'mediumId': mediumId,
+      'mediumType': mediumTypeToJson(mediumType),
+    });
+    return Medium.fromJson(json);
+  }
+
+  static Future<List<dynamic>> getThumbnail({
+    @required String mediumId,
+    MediumType mediumType,
+    int width,
+    int height,
+    bool highQuality,
+  }) async {
+    assert(mediumId != null);
+    final bytes = await _channel.invokeMethod('getThumbnail', {
+      'mediumId': mediumId,
+      'mediumType': mediumTypeToJson(mediumType),
+      'width': width,
+      'height': height,
+      'highQuality': highQuality,
+    });
+    return bytes;
+  }
+
+  static Future<List<dynamic>> getAlbumThumbnail({
+    @required String albumId,
+    int width,
+    int height,
+    bool highQuality,
+  }) async {
+    assert(albumId != null);
+    final bytes = await _channel.invokeMethod('getAlbumThumbnail', {
+      'albumId': albumId,
+      'width': width,
+      'height': height,
+      'highQuality': highQuality,
+    });
+    return bytes;
+  }
+
+  static Future<File> getFile({
+    @required String mediumId,
+    MediumType mediumType,
+  }) async {
+    assert(mediumId != null);
+    final path = await _channel.invokeMethod('getFile', {
+      'mediumId': mediumId,
+      'mediumType': mediumTypeToJson(mediumType),
+    }) as String;
+    return File(path);
+  }
+}

lib/src/common/medium_type.dart

@@ -0,0 +1,29 @@
+part of photogallery;
+
+/// A medium type.
+enum MediumType {
+  image,
+  video,
+}
+
+String mediumTypeToJson(MediumType value) {
+  switch (value) {
+    case MediumType.image:
+      return 'image';
+    case MediumType.video:
+      return 'video';
+    default:
+      return null;
+  }
+}
+
+MediumType jsonToMediumType(String value) {
+  switch (value) {
+    case 'image':
+      return MediumType.image;
+    case 'video':
+      return MediumType.video;
+    default:
+      return null;
+  }
+}

lib/src/image_providers/album_thumbnail_provider.dart

@@ -0,0 +1,60 @@
+part of photogallery;
+
+/// Fetches the given album thumbnail from the gallery.
+class AlbumThumbnailProvider extends ImageProvider<AlbumThumbnailProvider> {
+  const AlbumThumbnailProvider({
+    @required this.albumId,
+    this.height,
+    this.width,
+    this.highQuality = false,
+  }) : assert(albumId != null);
+
+  final String albumId;
+  final int height;
+  final int width;
+  final bool highQuality;
+
+  @override
+  ImageStreamCompleter load(key, decode) {
+    return MultiFrameImageStreamCompleter(
+      codec: _loadAsync(key, decode),
+      scale: 1.0,
+      informationCollector: () sync* {
+        yield ErrorDescription('Id: $albumId');
+      },
+    );
+  }
+
+  Future<ui.Codec> _loadAsync(
+      AlbumThumbnailProvider key, DecoderCallback decode) async {
+    assert(key == this);
+    final bytes = await PhotoGallery.getAlbumThumbnail(
+      albumId: albumId,
+      height: height,
+      width: width,
+      highQuality: highQuality,
+    );
+    if (bytes == null || bytes.length == 0)
+      return await decode(kTransparentImage);
+
+    return await decode(bytes);
+  }
+
+  @override
+  Future<AlbumThumbnailProvider> obtainKey(ImageConfiguration configuration) {
+    return SynchronousFuture<AlbumThumbnailProvider>(this);
+  }
+
+  @override
+  bool operator ==(dynamic other) {
+    if (other.runtimeType != runtimeType) return false;
+    final AlbumThumbnailProvider typedOther = other;
+    return albumId == typedOther.albumId;
+  }
+
+  @override
+  int get hashCode => albumId?.hashCode ?? 0;
+
+  @override
+  String toString() => '$runtimeType("$albumId")';
+}

lib/src/image_providers/photo_provider.dart

@@ -0,0 +1,51 @@
+part of photogallery;
+
+/// Fetches the given image from the gallery.
+class PhotoProvider extends ImageProvider<PhotoProvider> {
+  PhotoProvider({
+    @required this.mediumId,
+  }) : assert(mediumId != null);
+
+  final String mediumId;
+
+  @override
+  ImageStreamCompleter load(key, decode) {
+    return MultiFrameImageStreamCompleter(
+      codec: _loadAsync(key, decode),
+      scale: 1.0,
+      informationCollector: () sync* {
+        yield ErrorDescription('Id: $mediumId');
+      },
+    );
+  }
+
+  Future<ui.Codec> _loadAsync(PhotoProvider key, DecoderCallback decode) async {
+    assert(key == this);
+    final file = await PhotoGallery.getFile(
+        mediumId: mediumId, mediumType: MediumType.image);
+    if (file == null) return null;
+
+    final bytes = await file.readAsBytes();
+    if (bytes.lengthInBytes == 0) return null;
+
+    return await decode(bytes);
+  }
+
+  @override
+  Future<PhotoProvider> obtainKey(ImageConfiguration configuration) {
+    return SynchronousFuture<PhotoProvider>(this);
+  }
+
+  @override
+  bool operator ==(dynamic other) {
+    if (other.runtimeType != runtimeType) return false;
+    final PhotoProvider typedOther = other;
+    return mediumId == typedOther.mediumId;
+  }
+
+  @override
+  int get hashCode => mediumId?.hashCode ?? 0;
+
+  @override
+  String toString() => '$runtimeType("$mediumId")';
+}

lib/src/image_providers/thumbnail_provider.dart

@@ -0,0 +1,59 @@
+part of photogallery;
+
+/// Fetches the given medium thumbnail from the gallery.
+class ThumbnailProvider extends ImageProvider<ThumbnailProvider> {
+  const ThumbnailProvider({
+    @required this.mediumId,
+    this.height,
+    this.width,
+    this.highQuality,
+  }) : assert(mediumId != null);
+
+  final String mediumId;
+  final int height;
+  final int width;
+  final bool highQuality;
+
+  @override
+  ImageStreamCompleter load(key, decode) {
+    return MultiFrameImageStreamCompleter(
+      codec: _loadAsync(key, decode),
+      scale: 1.0,
+      informationCollector: () sync* {
+        yield ErrorDescription('Id: $mediumId');
+      },
+    );
+  }
+
+  Future<ui.Codec> _loadAsync(
+      ThumbnailProvider key, DecoderCallback decode) async {
+    assert(key == this);
+    final bytes = await PhotoGallery.getThumbnail(
+      mediumId: mediumId,
+      height: height,
+      width: width,
+      highQuality: highQuality,
+    );
+    if (bytes.length == 0) return null;
+
+    return await decode(bytes);
+  }
+
+  @override
+  Future<ThumbnailProvider> obtainKey(ImageConfiguration configuration) {
+    return SynchronousFuture<ThumbnailProvider>(this);
+  }
+
+  @override
+  bool operator ==(dynamic other) {
+    if (other.runtimeType != runtimeType) return false;
+    final ThumbnailProvider typedOther = other;
+    return mediumId == typedOther.mediumId;
+  }
+
+  @override
+  int get hashCode => mediumId?.hashCode ?? 0;
+
+  @override
+  String toString() => '$runtimeType("$mediumId")';
+}

lib/src/models/album.dart

@@ -0,0 +1,82 @@
+part of photogallery;
+
+/// A album in the gallery.
+@immutable
+class Album {
+  /// A unique identifier for the album.
+  final String id;
+
+  /// The [MediumType] of the album.
+  final MediumType mediumType;
+
+  /// The name of the album.
+  final String name;
+
+  /// The total number of media in the album.
+  final int count;
+
+  /// Indicates whether this album contains all media.
+  bool get isAllAlbum => id == "__ALL__";
+
+  /// Creates a album from platform channel protocol.
+  Album.fromJson(dynamic json)
+      : id = json['id'],
+        mediumType = jsonToMediumType(json['mediumType']),
+        name = json['name'],
+        count = json['count'];
+
+  /// list media in the album.
+  ///
+  /// Pagination can be controlled out of [skip] (defaults to `0`) and
+  /// [take] (defaults to `<total>`).
+  Future<MediaPage> listMedia({
+    int skip,
+    int take,
+  }) {
+    return PhotoGallery._listMedia(
+      album: this,
+      mediumType: this.mediumType,
+      total: this.count,
+      skip: skip,
+      take: take,
+    );
+  }
+
+  /// Get thumbnail data for this album.
+  ///
+  /// It will display the lastly taken medium thumbnail.
+  Future<List<int>> getThumbnail({
+    int width,
+    int height,
+    bool highQuality = false,
+  }) {
+    return PhotoGallery.getAlbumThumbnail(
+      albumId: id,
+      width: width,
+      height: height,
+      highQuality: highQuality,
+    );
+  }
+
+  @override
+  bool operator ==(Object other) =>
+      identical(this, other) ||
+      other is Album &&
+          runtimeType == other.runtimeType &&
+          id == other.id &&
+          mediumType == other.mediumType &&
+          name == other.name &&
+          count == other.count;
+
+  @override
+  int get hashCode =>
+      id.hashCode ^ mediumType.hashCode ^ name.hashCode ^ count.hashCode;
+
+  @override
+  String toString() {
+    return 'Album{id: $id, '
+        'mediumType: $mediumType, '
+        'name: $name, '
+        'count: $count}';
+  }
+}

lib/src/models/media_page.dart

@@ -0,0 +1,71 @@
+part of photogallery;
+
+/// A list of media with pagination support.
+@immutable
+class MediaPage {
+  final Album album;
+
+  /// The medium type of [items].
+  final MediumType mediumType;
+
+  /// The start offset for those media.
+  final int start;
+
+  /// The total number of items.
+  final int total;
+
+  /// The current items.
+  final List<Medium> items;
+
+  /// The end index in the album.
+  int get end => start + items.length;
+
+  ///Indicates whether this page is the last in the album.
+  bool get isLast => end >= total;
+
+  /// Creates a range of media from platform channel protocol.
+  MediaPage.fromJson(this.album, this.mediumType, dynamic json)
+      : start = json['start'],
+        total = json['total'],
+        items = json['items'].map<Medium>((x) => Medium.fromJson(x)).toList();
+
+  /// Gets the next page of media in the album.
+  Future<MediaPage> nextPage() {
+    assert(!isLast);
+    return PhotoGallery._listMedia(
+      album: album,
+      mediumType: mediumType,
+      total: total,
+      skip: end,
+      take: items.length,
+    );
+  }
+
+  @override
+  bool operator ==(Object other) =>
+      identical(this, other) ||
+      other is MediaPage &&
+          runtimeType == other.runtimeType &&
+          album == other.album &&
+          mediumType == other.mediumType &&
+          start == other.start &&
+          total == other.total &&
+          listEquals(items, other.items);
+
+  @override
+  int get hashCode =>
+      album.hashCode ^
+      mediumType.hashCode ^
+      start.hashCode ^
+      total.hashCode ^
+      items.hashCode;
+
+  @override
+  String toString() {
+    return 'MediaPage{album: $album, '
+        'mediumType: $mediumType, '
+        'start: $start, '
+        'total: $total, '
+        'items: $items}';
+  }
+}

lib/src/models/medium.dart

@@ -0,0 +1,123 @@
+part of photogallery;
+
+/// A medium in the gallery.
+///
+/// It can be of image or video [mediumType].
+@immutable
+class Medium {
+  /// A unique identifier for the medium.
+  final String id;
+
+  /// The medium type.
+  final MediumType mediumType;
+
+  /// The medium width.
+  final int width;
+
+  /// The medium height.
+  final int height;
+
+  /// The date at which the photo or video was taken.
+  final DateTime creationDate;
+
+  /// The date at which the photo or video was modified.
+  final DateTime modifiedDate;
+
+  Medium({
+    this.id,
+    this.mediumType,
+    this.width,
+    this.height,
+    this.creationDate,
+    this.modifiedDate,
+  });
+
+  /// Creates a medium from platform channel protocol.
+  Medium.fromJson(dynamic json)
+      : id = json["id"],
+        mediumType = jsonToMediumType(json["mediumType"]),
+        width = json["width"],
+        height = json["height"],
+        creationDate = json['creationDate'] != null
+            ? DateTime.fromMillisecondsSinceEpoch(json['creationDate'])
+            : null,
+        modifiedDate = json['modifiedDate'] != null
+            ? DateTime.fromMillisecondsSinceEpoch(json['modifiedDate'])
+            : null;
+
+  static Medium fromMap(Map map) {
+    return Medium(
+      id: map['id'],
+      mediumType: jsonToMediumType(map['mediumType']),
+      width: map['width'],
+      height: map['height'],
+      creationDate: map['creationDate'],
+      modifiedDate: map['modifiedDate'],
+    );
+  }
+
+  Map toMap() {
+    return {
+      "id": this.id,
+      "mediumType": mediumTypeToJson(this.mediumType),
+      "height": this.height,
+      "width": this.width,
+      "creationDate": this.creationDate,
+      "modifiedDate": this.modifiedDate,
+    };
+  }
+
+  /// Get a JPEG thumbnail's data for this medium.
+  Future<List<int>> getThumbnail({
+    int width,
+    int height,
+    bool highQuality = false,
+  }) {
+    return PhotoGallery.getThumbnail(
+      mediumId: id,
+      width: width,
+      height: height,
+      mediumType: mediumType,
+      highQuality: highQuality,
+    );
+  }
+
+  /// Get the original file.
+  Future<File> getFile() {
+    return PhotoGallery.getFile(
+      mediumId: id,
+      mediumType: mediumType,
+    );
+  }
+
+  @override
+  bool operator ==(Object other) =>
+      identical(this, other) ||
+      other is Medium &&
+          runtimeType == other.runtimeType &&
+          id == other.id &&
+          mediumType == other.mediumType &&
+          width == other.width &&
+          height == other.height &&
+          creationDate == other.creationDate &&
+          modifiedDate == other.modifiedDate;
+
+  @override
+  int get hashCode =>
+      id.hashCode ^
+      mediumType.hashCode ^
+      width.hashCode ^
+      height.hashCode ^
+      creationDate.hashCode ^
+      modifiedDate.hashCode;
+
+  @override
+  String toString() {
+    return 'Medium{id: $id, '
+        'mediumType: $mediumType, '
+        'width: $width, '
+        'height: $height, '
+        'creationDate: $creationDate, '
+        'modifiedDate: $modifiedDate}';
+  }
+}

pubspec.lock

@@ -0,0 +1,189 @@
+# Generated by pub
+# See https://dart.dev/tools/pub/glossary#lockfile
+packages:
+  archive:
+    dependency: transitive
+    description:
+      name: archive
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.0.13"
+  args:
+    dependency: transitive
+    description:
+      name: args
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.6.0"
+  async:
+    dependency: transitive
+    description:
+      name: async
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.4.1"
+  boolean_selector:
+    dependency: transitive
+    description:
+      name: boolean_selector
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.0.0"
+  charcode:
+    dependency: transitive
+    description:
+      name: charcode
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.1.3"
+  collection:
+    dependency: transitive
+    description:
+      name: collection
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.14.12"
+  convert:
+    dependency: transitive
+    description:
+      name: convert
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.1.1"
+  crypto:
+    dependency: transitive
+    description:
+      name: crypto
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.1.4"
+  flutter:
+    dependency: "direct main"
+    description: flutter
+    source: sdk
+    version: "0.0.0"
+  flutter_test:
+    dependency: "direct dev"
+    description: flutter
+    source: sdk
+    version: "0.0.0"
+  image:
+    dependency: transitive
+    description:
+      name: image
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.1.12"
+  matcher:
+    dependency: transitive
+    description:
+      name: matcher
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "0.12.6"
+  meta:
+    dependency: transitive
+    description:
+      name: meta
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.1.8"
+  path:
+    dependency: transitive
+    description:
+      name: path
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.6.4"
+  petitparser:
+    dependency: transitive
+    description:
+      name: petitparser
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.4.0"
+  quiver:
+    dependency: transitive
+    description:
+      name: quiver
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.1.3"
+  sky_engine:
+    dependency: transitive
+    description: flutter
+    source: sdk
+    version: "0.0.99"
+  source_span:
+    dependency: transitive
+    description:
+      name: source_span
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.7.0"
+  stack_trace:
+    dependency: transitive
+    description:
+      name: stack_trace
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.9.3"
+  stream_channel:
+    dependency: transitive
+    description:
+      name: stream_channel
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.0.0"
+  string_scanner:
+    dependency: transitive
+    description:
+      name: string_scanner
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.0.5"
+  term_glyph:
+    dependency: transitive
+    description:
+      name: term_glyph
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.1.0"
+  test_api:
+    dependency: transitive
+    description:
+      name: test_api
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "0.2.15"
+  transparent_image:
+    dependency: "direct main"
+    description:
+      name: transparent_image
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.0.0"
+  typed_data:
+    dependency: transitive
+    description:
+      name: typed_data
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.1.6"
+  vector_math:
+    dependency: transitive
+    description:
+      name: vector_math
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.0.8"
+  xml:
+    dependency: transitive
+    description:
+      name: xml
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "3.6.1"
+sdks:
+  dart: ">=2.7.0 <3.0.0"
+  flutter: ">=1.10.0"

pubspec.yaml

@@ -0,0 +1,65 @@
+name: photo_gallery
+description: A Flutter plugin that retrieves images and videos from mobile native gallery.
+version: 0.1.0+1
+repository: https://github.com/Firelands128/photo_gallery
+
+environment:
+  sdk: ">=2.7.0 <3.0.0"
+  flutter: ">=1.10.0"
+
+dependencies:
+  flutter:
+    sdk: flutter
+  transparent_image: ^1.0.0
+
+dev_dependencies:
+  flutter_test:
+    sdk: flutter
+
+# For information on the generic Dart part of this file, see the
+# following page: https://dart.dev/tools/pub/pubspec
+
+# The following section is specific to Flutter.
+flutter:
+  # This section identifies this Flutter project as a plugin project.
+  # The 'pluginClass' and Android 'package' identifiers should not ordinarily
+  # be modified. They are used by the tooling to maintain consistency when
+  # adding or updating assets for this project.
+  plugin:
+    platforms:
+      android:
+        package: com.morbit.photogallery
+        pluginClass: PhotoGalleryPlugin
+      ios:
+        pluginClass: PhotoGalleryPlugin
+
+  # To add assets to your plugin package, add an assets section, like this:
+  # assets:
+  #   - images/a_dot_burr.jpeg
+  #   - images/a_dot_ham.jpeg
+  #
+  # For details regarding assets in packages, see
+  # https://flutter.dev/assets-and-images/#from-packages
+  #
+  # An image asset can refer to one or more resolution-specific "variants", see
+  # https://flutter.dev/assets-and-images/#resolution-aware.
+
+  # To add custom fonts to your plugin package, add a fonts section here,
+  # in this "flutter" section. Each entry in this list should have a
+  # "family" key with the font family name, and a "fonts" key with a
+  # list giving the asset and other descriptors for the font. For
+  # example:
+  # fonts:
+  #   - family: Schyler
+  #     fonts:
+  #       - asset: fonts/Schyler-Regular.ttf
+  #       - asset: fonts/Schyler-Italic.ttf
+  #         style: italic
+  #   - family: Trajan Pro
+  #     fonts:
+  #       - asset: fonts/TrajanPro.ttf
+  #       - asset: fonts/TrajanPro_Bold.ttf
+  #         weight: 700
+  #
+  # For details regarding fonts in packages, see
+  # https://flutter.dev/custom-fonts/#from-packages

test/photo_gallery_test.dart

@@ -0,0 +1,87 @@
+import 'dart:io';
+
+import 'package:flutter/services.dart';
+import 'package:flutter_test/flutter_test.dart';
+import 'package:photo_gallery/photo_gallery.dart';
+
+import 'utils/generator.dart';
+import 'utils/mock_handler.dart';
+
+void main() {
+  const MethodChannel channel = MethodChannel('photo_gallery');
+
+  TestWidgetsFlutterBinding.ensureInitialized();
+
+  setUp(() {
+    channel.setMockMethodCallHandler(mockMethodCallHandler);
+  });
+
+  tearDown(() {
+    channel.setMockMethodCallHandler(null);
+  });
+
+  test('list albums', () async {
+    MediumType mediumType = MediumType.image;
+    var result = await PhotoGallery.listAlbums(mediumType: mediumType);
+    var expected = Generator.generateCollections(mediumType: mediumType);
+    expect(result, expected);
+  });
+
+  test('list media', () async {
+    MediumType mediumType = MediumType.image;
+    int skip = 0;
+    int take = 1;
+    List<Album> collections =
+        await PhotoGallery.listAlbums(mediumType: mediumType);
+    Album allCollection =
+        collections.firstWhere((element) => element.isAllAlbum);
+    MediaPage result = await allCollection.listMedia(skip: skip, take: take);
+    MediaPage expected = Generator.generateMediaPage(
+      collection: allCollection,
+      mediumType: mediumType,
+      skip: skip,
+      take: take,
+    );
+    expect(result, expected);
+  });
+
+  test('get medium', () async {
+    String mediumId = 0.toString();
+    MediumType mediumType = MediumType.image;
+    Medium result = await PhotoGallery.getMedium(
+      mediumId: mediumId,
+      mediumType: mediumType,
+    );
+    Medium expected =
+        Generator.generateMedia(mediumId: mediumId, mediumType: mediumType);
+    expect(result, expected);
+  });
+
+  test('get thumbnail', () async {
+    String mediumId = 0.toString();
+    MediumType mediumType = MediumType.image;
+    List result = await PhotoGallery.getThumbnail(
+        mediumId: mediumId, mediumType: mediumType);
+    List expected = Generator.generateMockThumbnail(
+        mediumId: mediumId, mediumType: mediumType);
+    expect(result, expected);
+  });
+
+  test('get collection thumbnail', () async {
+    String collectionId = "__ALL__";
+    List result = await PhotoGallery.getAlbumThumbnail(albumId: collectionId);
+    List expected =
+        Generator.generateMockCollectionThumbnail(collectionId: collectionId);
+    expect(result, expected);
+  });
+
+  test('get file', () async {
+    String mediumId = 0.toString();
+    MediumType mediumType = MediumType.image;
+    File result =
+        await PhotoGallery.getFile(mediumId: mediumId, mediumType: mediumType);
+    File expected =
+        Generator.generateFile(mediumId: mediumId, mediumType: mediumType);
+    expect(result.path, expected.path);
+  });
+}

test/utils/generator.dart

@@ -0,0 +1,119 @@
+import 'dart:io';
+
+import 'package:photo_gallery/photo_gallery.dart';
+
+class Generator {
+  static dynamic generateCollectionsJson({MediumType mediumType}) {
+    mediumType = mediumType ?? MediumType.image;
+    return [
+      {
+        "id": "__ALL__",
+        "mediumType": mediumTypeToJson(mediumType),
+        "name": "All",
+        "count": 5,
+      },
+      {
+        "id": "CollectionId",
+        "mediumType": mediumTypeToJson(mediumType),
+        "name": "CollectionName",
+        "count": 5,
+      }
+    ];
+  }
+
+  static List<Album> generateCollections({MediumType mediumType}) {
+    return Generator.generateCollectionsJson(mediumType: mediumType)
+        .map<Album>((x) => Album.fromJson(x))
+        .toList();
+  }
+
+  static dynamic generateMediaPageJson({
+    String collectionId,
+    MediumType mediumType,
+    int total,
+    int skip,
+    int take,
+  }) {
+    skip = skip ?? 0;
+    take = take ?? (total - skip);
+
+    var items = [];
+    int index = skip;
+    while (index < skip + take) {
+      items.add(generateMediaJson(
+          mediumId: index.toString(), mediumType: mediumType));
+      index++;
+    }
+
+    return {
+      "start": skip,
+      "total": total,
+      "items": items,
+    };
+  }
+
+  static dynamic generateMediaJson({
+    String mediumId,
+    MediumType mediumType,
+  }) {
+    return {
+      "id": mediumId,
+      "mediumType": mediumTypeToJson(mediumType),
+      "width": 512,
+      "height": 512,
+      "creationDate": DateTime(2020, 8, 1).millisecondsSinceEpoch,
+    };
+  }
+
+  static MediaPage generateMediaPage({
+    Album collection,
+    MediumType mediumType,
+    int skip,
+    int take,
+  }) {
+    dynamic json = generateMediaPageJson(
+      collectionId: collection.id,
+      mediumType: mediumType,
+      total: collection.count,
+      skip: skip,
+      take: take,
+    );
+    return MediaPage.fromJson(collection, mediumType, json);
+  }
+
+  static Medium generateMedia({
+    String mediumId,
+    MediumType mediumType,
+  }) {
+    return Medium.fromJson(
+      generateMediaJson(mediumId: mediumId, mediumType: mediumType),
+    );
+  }
+
+  static List<int> generateMockThumbnail({
+    String mediumId,
+    MediumType mediumType,
+  }) {
+    return [1, 2, 3, 4, 5, 6, 7, 8, 9];
+  }
+
+  static List<int> generateMockCollectionThumbnail({
+    String collectionId,
+  }) {
+    return [1, 2, 3, 4, 5, 6, 7, 8, 9];
+  }
+
+  static String generateFilePath({
+    String mediumId,
+    MediumType mediumType,
+  }) {
+    return "/path/to/file";
+  }
+
+  static File generateFile({
+    String mediumId,
+    MediumType mediumType,
+  }) {
+    return File(generateFilePath(mediumId: mediumId, mediumType: mediumType));
+  }
+}

test/utils/mock_handler.dart

@@ -0,0 +1,52 @@
+import 'package:flutter/services.dart';
+import 'package:flutter_test/flutter_test.dart';
+import 'package:photo_gallery/photo_gallery.dart';
+
+import 'generator.dart';
+
+Future<dynamic> mockMethodCallHandler(MethodCall call) async {
+  if (call.method == "listAlbums") {
+    MediumType mediumType = jsonToMediumType(call.arguments['mediumType']);
+    dynamic collections =
+        Generator.generateCollectionsJson(mediumType: mediumType);
+    return collections;
+  } else if (call.method == "listMedia") {
+    String collectionId = call.arguments['collectionId'];
+    MediumType mediumType = jsonToMediumType(call.arguments['mediumType']);
+    int total = call.arguments['total'];
+    int skip = call.arguments['skip'];
+    int take = call.arguments['take'];
+    dynamic mediaPage = Generator.generateMediaPageJson(
+      collectionId: collectionId,
+      mediumType: mediumType,
+      total: total,
+      skip: skip,
+      take: take,
+    );
+    return mediaPage;
+  } else if (call.method == "getMedium") {
+    String mediumId = call.arguments['mediumId'];
+    MediumType mediumType = jsonToMediumType(call.arguments['mediumType']);
+    dynamic media =
+        Generator.generateMediaJson(mediumId: mediumId, mediumType: mediumType);
+    return media;
+  } else if (call.method == "getThumbnail") {
+    String mediumId = call.arguments['mediumId'];
+    MediumType mediumType = jsonToMediumType(call.arguments['mediumType']);
+    dynamic thumbnail = Generator.generateMockThumbnail(
+        mediumId: mediumId, mediumType: mediumType);
+    return thumbnail;
+  } else if (call.method == "getAlbumThumbnail") {
+    String collectionId = call.arguments['collectionId'];
+    dynamic thumbnail =
+        Generator.generateMockCollectionThumbnail(collectionId: collectionId);
+    return thumbnail;
+  } else if (call.method == "getFile") {
+    String mediumId = call.arguments['mediumId'];
+    MediumType mediumType = jsonToMediumType(call.arguments['mediumType']);
+    dynamic path =
+        Generator.generateFilePath(mediumId: mediumId, mediumType: mediumType);
+    return path;
+  }
+  throw UnimplementedError();
+}