flutter_notification_listener 1.0.1

Flutter Plugin to listen to all incoming notifications for Android.

example/lib/main.dart

import 'dart:isolate';
import 'dart:ui';

import 'package:flutter/material.dart';
import 'dart:async';

import 'package:flutter_notification_listener/flutter_notification_listener.dart';

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

class MyApp extends StatefulWidget {
  @override
  _MyAppState createState() => _MyAppState();
}

class _MyAppState extends State<MyApp> {

  @override
  void initState() {
    super.initState();
  }

  @override
  Widget build(BuildContext context) {
    return new MaterialApp(
      home: NotificationsLog(),
    );
  }
}

class NotificationsLog extends StatefulWidget {
  @override
  _NotificationsLogState createState() => _NotificationsLogState();
}

class _NotificationsLogState extends State<NotificationsLog> {
  
  List<NotificationEvent> _log = [];
  bool started = false;
  bool _loading = false;

  ReceivePort port = ReceivePort();

  @override
  void initState() {
    initPlatformState();
    super.initState();
  }

  // we must use static method, to handle in background
  static void _callback(NotificationEvent evt) {
    print("send evt to ui: $evt");
    final SendPort send = IsolateNameServer.lookupPortByName("_listener_");
    if (send == null) print("can't find the sender");
    send?.send(evt);
  }

  // Platform messages are asynchronous, so we initialize in an async method.
  Future<void> initPlatformState() async {

    NotificationsListener.initialize(callbackHandle: _callback);

    // this can fix restart<debug> can't handle error
    IsolateNameServer.removePortNameMapping("_listener_");
    IsolateNameServer.registerPortWithName(port.sendPort, "_listener_");
    port.listen((message) => onData(message));

    // don't use the default receivePort
    // NotificationsListener.receivePort.listen((evt) => onData(evt));

    var isR = await NotificationsListener.isRunning;
    print("""Service is ${!isR ? "not " : ""}aleary running""");

    setState(() {
      started = isR;
    });
  }

  void onData(NotificationEvent event) {
    setState(() {
      _log.add(event);
    });
    print(event.toString());
  }

  void startListening() async {
    print("start listening");
    setState(() {
      _loading = true;
    });
    var hasPermission = await NotificationsListener.hasPermission;
    if (!hasPermission) {
      print("no permission, so open settings");
      NotificationsListener.openPermissionSettings();
      return;
    }

    var isR = await NotificationsListener.isRunning;

    if (!isR) {
      await NotificationsListener.startService();
    }

    setState(() { 
      started = true;
      _loading = false;
    });
  }

  void stopListening() async {
    print("stop listening");

    setState(() {
      _loading = true;
    });

    await NotificationsListener.stopService();

    setState(() {
      started = false;
      _loading = false;
    });
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
        appBar: AppBar(
          title: Text('Notifications Listener Example'),
        ),
        body: Center(
            child: ListView.builder(
                itemCount: _log.length,
                reverse: true,
                itemBuilder: (BuildContext context, int idx) {
                  final entry = _log[idx];
                  return ListTile(
                      trailing: Text(entry.packageName.toString().split('.').last),
                      title: Container(
                        child: Column(
                          crossAxisAlignment: CrossAxisAlignment.start,
                          children: [
                            Text(entry.title??"<<no title>>"),
                            Text(entry.timestamp.toString().substring(0, 19)),
                          ],
                        ),
                      ));
                })),
        floatingActionButton: FloatingActionButton(
          onPressed: started ? stopListening : startListening,
          tooltip: 'Start/Stop sensing',
          child: _loading ? Icon(Icons.close) : (started ? Icon(Icons.stop) : Icon(Icons.play_arrow)),
        ),
      );
  }
}