gallery_picker/example/lib/main.dart

import 'package:flutter/material.dart';
import 'package:gallery_picker/gallery_picker.dart';
import 'package:modal_bottom_sheet/modal_bottom_sheet.dart';

void main() {
  runApp(const MyApp());
}

class MyApp extends StatelessWidget {
  const MyApp({super.key});

  // This widget is the root of your application.
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: const MyHomePage(title: 'Flutter Demo Home Page'),
    );
  }
}

class MyHomePage extends StatefulWidget {
  const MyHomePage({super.key, required this.title});

  // This widget is the home page of your application. It is stateful, meaning
  // that it has a State object (defined below) that contains fields that affect
  // how it looks.

  // This class is the configuration for the state. It holds the values (in this
  // case the title) provided by the parent (in this case the App widget) and
  // used by the build method of the State. Fields in a Widget subclass are
  // always marked "final".

  final String title;

  @override
  State<MyHomePage> createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  int _counter = 0;

  void viewGalleryPicker() {
    Navigator.push(
      context,
      MaterialPageRoute(
          builder: (context) => GalleryPicker(
                onSelect: (selectedMedias) {
                  print(selectedMedias.length);
                },
                heroBuilder: (tag, media, context) {
                  return Scaffold(
                    appBar: AppBar(
                      title: const Text('Flippers Page'),
                    ),
                    body: Container(
                      // The blue background emphasizes that it's a new route.
                      color: Colors.lightBlueAccent,
                      padding: const EdgeInsets.all(16.0),
                      alignment: Alignment.topLeft,
                      child: Hero(
                        tag: tag,
                        child: Image.memory(media.thumbnail!),
                      ),
                    ),
                    floatingActionButton: FloatingActionButton(
                      onPressed: () {
                        Navigator.push(
                          context,
                          MaterialPageRoute(
                              builder: (context) => MyHomePage(
                                    title: "messages",
                                  )),
                        );
                        disposeGalleryPicker();
                      },
                      child: Icon(Icons.send),
                    ),
                  );
                },
                multipleMediaBuilder: (medias, context) {
                  return Scaffold(
                    appBar: AppBar(
                      title: const Text('Flippers Page'),
                    ),
                    body: GridView.count(
                      crossAxisCount: 3,
                      mainAxisSpacing: 5,
                      crossAxisSpacing: 5,
                      children: [
                        for (var media in medias) Image.memory(media.thumbnail!)
                      ],
                    ),
                    floatingActionButton: FloatingActionButton(
                      onPressed: () {
                        Navigator.push(
                          context,
                          MaterialPageRoute(
                              builder: (context) => MyHomePage(
                                    title: "messages",
                                  )),
                        );
                        disposeGalleryPicker();
                      },
                      child: Icon(Icons.send),
                    ),
                  );
                },
              )),
    );
  }

  showBottomSheet() {
    showMaterialModalBottomSheet(
      context: context,
      builder: (context) => SingleChildScrollView(
        controller: ModalScrollController.of(context),
        child: SizedBox(
          width: MediaQuery.of(context).size.width,
          height: MediaQuery.of(context).size.height,
          child: GalleryPicker(
            onSelect: (selectedMedias) {
              print(selectedMedias.length);
            },
            heroBuilder: (heroId, media, context) {
              return Scaffold(
                appBar: AppBar(
                  title: const Text('Flippers Page'),
                ),
                body: Container(
                  // The blue background emphasizes that it's a new route.
                  color: Colors.lightBlueAccent,
                  padding: const EdgeInsets.all(16.0),
                  alignment: Alignment.topLeft,
                  child: GestureDetector(
                    onTap: () => Navigator.pop(context),
                    child: Hero(
                      tag: heroId,
                      child: Image.memory(media.thumbnail!),
                    ),
                  ),
                ),
                floatingActionButton: FloatingActionButton(
                  backgroundColor: Colors.orange,
                  onPressed: () {
                    Navigator.push(
                      context,
                      MaterialPageRoute(
                          builder: (context) => MyHomePage(
                                title: "messages",
                              )),
                    );
                    disposeGalleryPicker();
                  },
                  child: Icon(
                    Icons.send,
                    color: Colors.white,
                  ),
                ),
              );
            },
            multipleMediaBuilder: (medias, context) {
              return Scaffold(
                appBar: AppBar(
                  title: const Text('Flippers Page'),
                ),
                body: GridView.count(
                  crossAxisCount: 3,
                  mainAxisSpacing: 5,
                  crossAxisSpacing: 5,
                  children: [
                    for (var media in medias) Image.memory(media.thumbnail!)
                  ],
                ),
                floatingActionButton: FloatingActionButton(
                  onPressed: () {
                    Navigator.push(
                      context,
                      MaterialPageRoute(
                          builder: (context) => MyHomePage(
                                title: "messages",
                              )),
                    );
                    disposeGalleryPicker();
                  },
                  child: Icon(
                    Icons.send,
                    color: Colors.white,
                  ),
                ),
              );
            },
          ),
        ),
      ),
    );
  }

  @override
  Widget build(BuildContext context) {
    // This method is rerun every time setState is called, for instance as done
    // by the _incrementCounter method above.
    //
    // The Flutter framework has been optimized to make rerunning build methods
    // fast, so that you can just rebuild anything that needs updating rather
    // than having to individually change instances of widgets.
    return Scaffold(
      appBar: AppBar(
        // Here we take the value from the MyHomePage object that was created by
        // the App.build method, and use it to set our appbar title.
        title: Text(widget.title),
      ),
      body: Stack(
        children: [
          Center(
            // Center is a layout widget. It takes a single child and positions it
            // in the middle of the parent.
            child: Column(
              // Column is also a layout widget. It takes a list of children and
              // arranges them vertically. By default, it sizes itself to fit its
              // children horizontally, and tries to be as tall as its parent.
              //
              // Invoke "debug painting" (press "p" in the console, choose the
              // "Toggle Debug Paint" action from the Flutter Inspector in Android
              // Studio, or the "Toggle Debug Paint" command in Visual Studio Code)
              // to see the wireframe for each widget.
              //
              // Column has various properties to control how it sizes itself and
              // how it positions its children. Here we use mainAxisAlignment to
              // center the children vertically; the main axis here is the vertical
              // axis because Columns are vertical (the cross axis would be
              // horizontal).
              mainAxisAlignment: MainAxisAlignment.center,
              children: <Widget>[
                const Text(
                  'You have pushed the button this many times:',
                ),
              ],
            ),
          ),
        ],
      ),
      floatingActionButton: FloatingActionButton(
        onPressed: showBottomSheet,
        tooltip: 'Increment',
        child: const Icon(Icons.add),
      ), // This trailing comma makes auto-formatting nicer for build methods.
    );
  }
}