3 建设营销型网站流程图,网站两侧广告代码,wordpress新建全屏页面,培训教育flutter开发实战-just_audio实现播放音频暂停音频设置音量等
最近开发过程中遇到需要播放背景音等音频播放#xff0c;这里使用just_audio来实现播放音频暂停音频设置音量等 一、引入just_audio
在pubspec.yaml引入just_audio just_audio: ^2.7.0在iOS上#xff0c;video_p…flutter开发实战-just_audio实现播放音频暂停音频设置音量等
最近开发过程中遇到需要播放背景音等音频播放这里使用just_audio来实现播放音频暂停音频设置音量等 一、引入just_audio
在pubspec.yaml引入just_audio just_audio: ^2.7.0在iOS上video_player使用的是AVPlayer进行播放。 在Android上video_player使用的是ExoPlayer。
二、使用前设置
2.1 在iOS中的设置 在iOS工程中info.plist添加一下设置以便支持HttpsHTTP的视频地址
keyNSAppTransportSecurity/key
dictkeyNSAllowsArbitraryLoads/keytrue/
/dict2.2 在Android中的设置 需要在/android/app/src/main/AndroidManifest.xml文件中添加网络权限
uses-permission android:nameandroid.permission.INTERNET/三、just_audio实现播放音频暂停音频设置音量等
引入just_audio后可以使用AudioPlayer来播放音频
3.1 常用操作如下
播放
await _audioPlayer.play();暂停
await _audioPlayer.pause();seek
await _audioPlayer.seek(position);停止
await _audioPlayer.pause();
await _audioPlayer.seek(Duration.zero);设置音量
await _audioPlayer.setVolume(volume);3.2 使用just_audio实现播放player
这里通过player来获取SDAudioPlayerState状态控制音频的暂停音频设置音量等操作
import package:flutter_app/manager/logger_manager.dart;
import package:just_audio/just_audio.dart;// 播放回调
typedef SDAudioPlayerCallBack void Function(SDAudioPlayerState state, SDAudioPlayerError? error);// 播放音频的状态
enum SDAudioPlayerState {idle, // 默认loading, // 加载中buffering, // 缓存中ready, // 可播放completed, // 播放完成
}// 播放音频出现错误
class SDAudioPlayerError {String? message;
}// 定义优先级的类
class SDMusicConfig {// 音频文件地址late String audioUrl ;late bool runLoop false; // 是否循环播放// 构造函数SDMusicConfig(this.audioUrl, this.audioPriority, this.runLoop);
}// 播放音频文件
class SDMusicPlayer {// 音频播放late AudioPlayer _audioPlayer;// 优先级late SDMusicConfig _musicConfig;late bool _playing false; // 是否正在播放late SDAudioPlayerState _playerState SDAudioPlayerState.idle; // 状态late SDAudioPlayerCallBack? _playerCallBack;SDMusicPlayer(this._audioPlayer, this._musicConfig){setAudioUrl(this._musicConfig.audioUrl);openPlayCallBack((state, error) {});}SDMusicConfig getMusicConfig() {return _musicConfig;}void openPlayCallBack(SDAudioPlayerCallBack playerCallBack) {_playerCallBack playerCallBack;_audioPlayer.playerStateStream.listen((state) {_playing state.playing;switch(state.processingState) {case ProcessingState.idle: {_playerState SDAudioPlayerState.idle;break;}case ProcessingState.loading: {_playerState SDAudioPlayerState.loading;break;}case ProcessingState.buffering: {_playerState SDAudioPlayerState.buffering;break;}case ProcessingState.ready: {_playerState SDAudioPlayerState.ready;break;}case ProcessingState.completed: {_playerState SDAudioPlayerState.completed;if (_musicConfig.runLoop true) {// 循环播放的时候seek(Duration.zero);play();} else {stop();}break;}default:}if (_playerCallBack ! null) {_playerCallBack!(_playerState, null);}});}// var duration await player.setUrl(https://foo.com/bar.mp3);Futurevoid setAudioUrl(String url) async {SDAudioPlayerError? error;if (url.isNotEmpty) {// Set the audio source but manually load audio at a later point.try {_audioPlayer.setUrl(url, preload: true);// Acquire platform decoders and start loading audio.var duration await _audioPlayer.load();print(url${url} duration${duration});} on PlayerException catch (e) {// iOS/macOS: maps to NSError.code// Android: maps to ExoPlayerException.type// Web: maps to MediaError.code// Linux/Windows: maps to PlayerErrorCode.indexprint(SDAudioPlayer Error code: ${e.code});// iOS/macOS: maps to NSError.localizedDescription// Android: maps to ExoPlaybackException.getMessage()// Web/Linux: a generic message// Windows: MediaPlayerError.messageprint(SDAudioPlayer Error message: ${e.message});error SDAudioPlayerError();error.message e.message;} on PlayerInterruptedException catch (e) {// This call was interrupted since another audio source was loaded or the// player was stopped or disposed before this audio source could complete// loading.LoggerManager().debug(SDAudioPlayer Connection aborted: ${e.message});error SDAudioPlayerError();error.message e.message;} catch (e) {// Fallback for all errorsprint(e: ${e});error SDAudioPlayerError();error.message e.toString();}} else {error SDAudioPlayerError();error.message 播放地址不能为空;}if (_playerCallBack ! null) {_playerCallBack!(_playerState, error);}}void play() async {// Usually you dont want to wait for playback to finish.if (_musicConfig.audioUrl ! null _musicConfig.audioUrl.isNotEmpty) {if (_playing false) {// 正在播放await _audioPlayer.play();}}}void pause() async {if (_musicConfig.audioUrl ! null _musicConfig.audioUrl.isNotEmpty) {await _audioPlayer.pause();}}void stop() async {if (_musicConfig.audioUrl ! null _musicConfig.audioUrl.isNotEmpty) {await _audioPlayer.pause();await _audioPlayer.seek(Duration.zero);}}void seek(Duration position) async {if (_musicConfig.audioUrl ! null _musicConfig.audioUrl.isNotEmpty) {await _audioPlayer.seek(position);}}void setVolume(double volume) async {if (_musicConfig.audioUrl ! null _musicConfig.audioUrl.isNotEmpty) {await _audioPlayer.setVolume(volume);}}// 不需要该播放器则需要调用该方法void dispose() async {await _audioPlayer.dispose();}
}四、小结
flutter开发实战-just_audio实现播放音频暂停音频设置音量等。 学习记录每天不停进步。
