update build.gradle file

android/build.gradle

@@ -27,12 +27,23 @@ apply plugin: 'kotlin-android'
 android {
     compileSdkVersion 33
 
+    compileOptions {
+        sourceCompatibility JavaVersion.VERSION_1_8
+        targetCompatibility JavaVersion.VERSION_1_8
+    }
+
+    kotlinOptions {
+        jvmTarget = '1.8'
+    }
+
     sourceSets {
         main.java.srcDirs += 'src/main/kotlin'
     }
+
     defaultConfig {
         minSdkVersion 16
     }
+
     lintOptions {
         disable 'InvalidPackage'
     }

example/android/app/build.gradle

@@ -26,23 +26,38 @@ apply plugin: 'kotlin-android'
 apply from: "$flutterRoot/packages/flutter_tools/gradle/flutter.gradle"
 
 android {
-    compileSdkVersion 33
+    compileSdkVersion flutter.compileSdkVersion
+    ndkVersion flutter.ndkVersion
+
+    compileOptions {
+        sourceCompatibility JavaVersion.VERSION_1_8
+        targetCompatibility JavaVersion.VERSION_1_8
+    }
+
+    kotlinOptions {
+        jvmTarget = '1.8'
+    }
 
     sourceSets {
         main.java.srcDirs += 'src/main/kotlin'
     }
 
-    lintOptions {
-        disable 'InvalidPackage'
-    }
-
     defaultConfig {
         applicationId "com.morbit.photo_gallery_example"
-        minSdkVersion 16
+        // You can update the following values to match your application needs.
-        targetSdkVersion 33
+        // For more information, see: https://docs.flutter.dev/deployment/android#reviewing-the-gradle-build-configuration.
+        minSdkVersion flutter.minSdkVersion
+        targetSdkVersion flutter.targetSdkVersion
         versionCode flutterVersionCode.toInteger()
         versionName flutterVersionName
     }
+
+    buildTypes {
+        release {
+            // Signing with the debug keys for now, so `flutter run --release` works.
+            signingConfig signingConfigs.debug
+        }
+    }
 }
 
 flutter {