likk_picker 1.1.5+1

Camera and Gallery picker asset from Photo Manager. Custom view from Facebook Messenger. (Image Picker, Camera, Gallery Reader)

example/lib/main.dart

import 'package:example/collapsable_gallery.dart';
import 'package:example/fullscreen_gallery.dart';
import 'package:flutter/material.dart';
import 'package:flutter/rendering.dart';

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

///
// ignore: use_key_in_widget_constructors
class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      debugShowCheckedModeBanner: false,
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: _Home(),
    );
  }
}

class _Home extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: _PickerDemo(),
    );
  }
}

class _PickerDemo extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      backgroundColor: Colors.cyan,
      body: Center(
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          children: [
            TextButton(
              onPressed: () {
                Navigator.push<void>(
                  context,
                  MaterialPageRoute(
                      builder: (context) => const FullscreenGallery()),
                );
              },
              style: TextButton.styleFrom(
                primary: Colors.white,
                backgroundColor: Colors.green,
              ),
              child: const Text('Full screen mode'),
            ),
            const SizedBox(height: 20.0),
            TextButton(
              onPressed: () {
                Navigator.push<void>(
                  context,
                  MaterialPageRoute(
                      builder: (context) => const CollapsableGallery()),
                );
              },
              style: TextButton.styleFrom(
                primary: Colors.white,
                backgroundColor: Colors.green,
              ),
              child: const Text('Collapsable mode'),
            ),
            const SizedBox(height: 20.0),
          ],
        ),
      ),
    );
  }
}