volume_watcher 2.0.1

Support ios and android real-time return system volume value, maximum volume, initial volume, support set volume.

example/lib/main.dart

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

import 'package:flutter/services.dart';
import 'package:volume_watcher/volume_watcher.dart';

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

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

class _MyAppState extends State<MyApp> {
  String _platformVersion = 'Unknown';
  double currentVolume = 0;
  double initVolume = 0;
  double maxVolume = 0;

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

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

    // Platform messages may fail, so we use a try/catch PlatformException.
    try {
      VolumeWatcher.hideVolumeView = true;
      platformVersion = await VolumeWatcher.platformVersion;
    } on PlatformException {
      platformVersion = 'Failed to get platform version.';
    }

    double initVolume = 0;
    double maxVolume = 0;
    try {
      initVolume = await VolumeWatcher.getCurrentVolume;
      maxVolume = await VolumeWatcher.getMaxVolume;
    } on PlatformException {
      platformVersion = 'Failed to get volume.';
    }

    // If the widget was removed from the tree while the asynchronous platform
    // message was in flight, we want to discard the reply rather than calling
    // setState to update our non-existent appearance.
    if (!mounted) return;

    setState(() {
      _platformVersion = platformVersion;
      this.initVolume = initVolume;
      this.maxVolume = maxVolume;
    });
  }

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(
          title: const Text('Plugin example app'),
        ),
        body: Center(
          child: Column(
              mainAxisAlignment: MainAxisAlignment.center,
              children: <Widget>[
                VolumeWatcher(
                  onVolumeChangeListener: (double volume) {
                    setState(() {
                      currentVolume = volume;
                    });
                  },
                ),
                Text("系统版本=$_platformVersion"),
                Text("最大音量=$maxVolume"),
                Text("初始音量=$initVolume"),
                Text("当前音量=$currentVolume"),
                RaisedButton(
                  onPressed: () {
                    VolumeWatcher.setVolume(maxVolume * 0.5);
                  },
                  child: Text("设置音量为${maxVolume * 0.5}"),
                ),
                RaisedButton(
                  onPressed: () {
                    VolumeWatcher.setVolume(maxVolume * 0.0);
                  },
                  child: Text("设置音量为${maxVolume * 0.0}"),
                )
              ]),
        ),
      ),
    );
  }
}