flutter_fgbg 0.7.1

Flutter plugin to detect when app(not Flutter container) goes to background or foreground

example/lib/main.dart

import 'dart:async';
import 'dart:io';

import 'package:flutter/foundation.dart';
import 'package:flutter/material.dart';
import 'package:flutter_fgbg/flutter_fgbg.dart';
import 'package:image_picker/image_picker.dart';
import 'package:local_auth/local_auth.dart';

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

class MyApp extends StatefulWidget {
  const MyApp({Key? key}) : super(key: key);

  @override
  _MyAppState createState() => _MyAppState();
}

class _MyAppState extends State<MyApp> with WidgetsBindingObserver {
  final picker = ImagePicker();
  List<String> events = [];
  bool get _webOrMobile => kIsWeb || Platform.isAndroid || Platform.isIOS;
  bool get _mobile => !kIsWeb && (Platform.isAndroid || Platform.isIOS);

  late StreamSubscription sub;

  @override
  void didChangeAppLifecycleState(AppLifecycleState state) {
    events.add(state.toString());
    setState(() {});
  }

  @override
  void initState() {
    super.initState();
    WidgetsBinding.instance.addObserver(this);

    sub = FGBGEvents.instance.stream.listen(onData);
  }

  void onData(FGBGType type) {
    events.add("onData " + type.toString());
    setState(() {});
  }

  @override
  void dispose() {
    sub.cancel();
    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        body: SafeArea(
          child: Padding(
            padding: const EdgeInsets.all(16.0),
            child: Column(
              crossAxisAlignment: CrossAxisAlignment.start,
              children: <Widget>[
                FGBGNotifier(
                  child: SizedBox(),
                  onEvent: (event) {
                    events.add("FGBGNotifier " + event.toString());
                    setState(() {});
                  },
                ),
                const Text('All platforms:'),
                ElevatedButton(
                  onPressed: () {
                    events.clear();
                    setState(() {});
                  },
                  child: const Text("Clear logs"),
                ),
                const SizedBox(height: 16),
                const Text('Web + Mobile only:'),
                ElevatedButton(
                  onPressed: !_webOrMobile
                      ? null
                      : () async {
                          events.add("// Opening camera");
                          setState(() {});
                          await picker.pickImage(source: ImageSource.camera);
                        },
                  child: const Text("Take Image"),
                ),
                ElevatedButton(
                  onPressed: !_webOrMobile
                      ? null
                      : () async {
                          events.add("// Opening gallery");
                          setState(() {});
                          await picker.pickImage(source: ImageSource.gallery);
                        },
                  child: const Text("Pick Image"),
                ),
                ElevatedButton(
                  onPressed: !_webOrMobile
                      ? null
                      : () async {
                          events.add(
                              "// Opening camera but ignoring events during this");
                          setState(() {});
                          FGBGEvents.ignoreWhile(() async {
                            await picker.pickImage(source: ImageSource.camera);
                          });
                        },
                  child: const Text("Take Image ignoreWhile"),
                ),
                ElevatedButton(
                  onPressed: !_webOrMobile
                      ? null
                      : () async {
                          events.add(
                              "// Opening gallery but ignoring events during this");
                          setState(() {});

                          FGBGEvents.ignoreWhile(() async {
                            await picker.pickImage(source: ImageSource.gallery);
                          });
                        },
                  child: const Text("Pick Image ignoreWhile"),
                ),
                const SizedBox(height: 16),
                const Text('Mobile only:'),
                ElevatedButton(
                  onPressed: !_mobile
                      ? null
                      : () async {
                          events.add("// Prompting biometric");
                          setState(() {});
                          var auth = LocalAuthentication();

                          await auth.authenticate(
                            // biometricOnly: true,
                            options: const AuthenticationOptions(
                              biometricOnly: true,
                            ),
                            localizedReason: 'Test',
                          );
                        },
                  child: const Text("FaceID"),
                ),
                const SizedBox(height: 16),
                const Text('Events:'),
                Expanded(
                  child: ListView(
                    children: [for (var e in events) Text(e)],
                  ),
                ),
              ],
            ),
          ),
        ),
      ),
    );
  }
}