十大网站有哪些,网站建设 模板,团购火锅自助网站建设,python 做网站开发flutter开发实战-实现音效soundpool播放音频
最近开发过程中遇到低配置设备时候#xff0c;在Media播放音频时候出现音轨限制问题。所以将部分音频采用音效sound来播放。
一、音效类似iOS中的Sound
在iOS中使用sound来播放mp3音频示例如下
// 通过通知的Sound设置为voip_c…flutter开发实战-实现音效soundpool播放音频
最近开发过程中遇到低配置设备时候在Media播放音频时候出现音轨限制问题。所以将部分音频采用音效sound来播放。
一、音效类似iOS中的Sound
在iOS中使用sound来播放mp3音频示例如下
// 通过通知的Sound设置为voip_call.caf这里播放一段空白音频音频结束后结束震动NSString *path [[NSBundle mainBundle] pathForResource:blank_call.mp3 ofType:nil];AudioServicesCreateSystemSoundID((__bridge CFURLRef)[NSURL fileURLWithPath:path], soundID);AudioServicesAddSystemSoundCompletion(soundID, NULL, NULL, soundCompleteCallback, NULL);AudioServicesAddSystemSoundCompletion(kSystemSoundID_Vibrate, NULL, NULL, soundCompleteCallback, NULL);
[self startShakeSound];/// 开始播放与震动
- (void)startShakeSound {// 声音AudioServicesPlaySystemSound(soundID);// 震动AudioServicesPlaySystemSound(kSystemSoundID_Vibrate);
}/// 结束播放与震动
- (void)stopShakeSound {AudioServicesDisposeSystemSoundID(soundID);AudioServicesRemoveSystemSoundCompletion(soundID);
}//AudioServicesAddSystemSoundCompletion的回调函数
void soundCompleteCallback(SystemSoundID sound,void * clientData) {if (sound kSystemSoundID_Vibrate) {AudioServicesPlayAlertSound(sound);//重复响铃震动} else {// 移除AudioServicesDisposeSystemSoundID(sound);AudioServicesRemoveSystemSoundCompletion(sound);AudioServicesDisposeSystemSoundID(kSystemSoundID_Vibrate);AudioServicesRemoveSystemSoundCompletion(kSystemSoundID_Vibrate);}
}在iOS中通过soundID可以控制播放与暂停当然iOS中sound播放完成有通知回调callback。soundpool暂时没找到播放完成回调callback。
二、使用soundpool播放音频
2.1、引入soundpool
在pubspec.yaml中引入
soundpool: ^2.3.02.2、使用soundpool来播放音频
Soundpool的初始化要用到SoundpoolOptions
SoundpoolOptions soundpoolOptions SoundpoolOptions();
_soundpool Soundpool.fromOptions(options: soundpoolOptions);
_soundId await _soundpool!.loadUri(url);播放控制需要使用AudioStreamControl比如播放、暂停、停止、设置音量等控制操作
播放
_audioStreamControl await _soundpool!.playWithControls(_soundId!);暂停
await _audioStreamControl!.pause();停止
await _audioStreamControl!.stop();设置音量
await _audioStreamControl!.setVolume(volume: volume);2.3、通过播放时长控制是否可以再次播放
由于soundpool没有播放音频完成回调这里采用通过Media将音频时长获取到之后判断时间。判断当前播放时间与上次播放的时间间隔是否超过了音频时长Duration。
if (lastPlayMilliseconds null) {lastPlayMilliseconds TimeUtil.currentTimeMillis();_audioStreamControl await _soundpool!.playWithControls(_soundId!);} else {int nowMilliseconds TimeUtil.currentTimeMillis();bool shouldPlay true;if (audioDurationInMilliseconds ! null) {if (nowMilliseconds - lastPlayMilliseconds! audioDurationInMilliseconds!) {shouldPlay false;}}if (shouldPlay) {// 如果上次没有播放完成不进行播放// 通过判断播放时长_audioStreamControl await _soundpool!.playWithControls(_soundId!);lastPlayMilliseconds nowMilliseconds;}}整体使用soundpool播放音频的相关代码如下
import package:soundpool/soundpool.dart;// 使用SoundPool
class SoundPlayer implements BaseAudioPlayer {// AudioStreamControl// SoundpoolSoundpool? _soundpool;String? audioUrl;// 上次播放时长的毫秒数int? lastPlayMilliseconds;// 时长int? audioDurationInMilliseconds;// 优先级late AudioConfig __audioConfig;late bool _playing false; // 是否正在播放int? _soundId;AudioStreamControl? _audioStreamControl;SoundPlayer(this.__audioConfig, {Duration? duration}) {if (duration ! null) {audioDurationInMilliseconds duration!.inMilliseconds;}print(SoundPlayer audioDurationInMilliseconds:${audioDurationInMilliseconds});SoundpoolOptions soundpoolOptions SoundpoolOptions();_soundpool Soundpool.fromOptions(options: soundpoolOptions);setAudioUrl(__audioConfig.audioUrl);}Futurevoid setAudioUrl(String url) async {if (_soundpool ! null) {_soundId await _soundpool!.loadUri(url);}}AudioConfig get_audioConfig() {return __audioConfig;}overridevoid play() async {// Usually you dont want to wait for playback to finish.if (__audioConfig.audioUrl ! null __audioConfig.audioUrl.isNotEmpty _soundId ! null _soundpool ! null) {if (lastPlayMilliseconds null) {lastPlayMilliseconds TimeUtil.currentTimeMillis();_audioStreamControl await _soundpool!.playWithControls(_soundId!);} else {int nowMilliseconds TimeUtil.currentTimeMillis();bool shouldPlay true;if (audioDurationInMilliseconds ! null) {if (nowMilliseconds - lastPlayMilliseconds! audioDurationInMilliseconds!) {shouldPlay false;}}if (shouldPlay) {// 如果上次没有播放完成不进行播放// 通过判断播放时长_audioStreamControl await _soundpool!.playWithControls(_soundId!);lastPlayMilliseconds nowMilliseconds;}}}}overridevoid pause() async {if (__audioConfig.audioUrl ! null __audioConfig.audioUrl.isNotEmpty _audioStreamControl ! null) {try {await _audioStreamControl!.pause();} catch(e) {print(audioStreamControl pause e:${e.toString()});}}}overridevoid stop() async {if (__audioConfig.audioUrl ! null __audioConfig.audioUrl.isNotEmpty _audioStreamControl ! null) {try {await _audioStreamControl!.stop();} catch(e) {print(audioStreamControl stop e:${e.toString()});}}}overridevoid setVolume(double volume) async {if (__audioConfig.audioUrl ! null __audioConfig.audioUrl.isNotEmpty _audioStreamControl ! null) {try {await _audioStreamControl!.setVolume(volume: volume);} catch(e) {print(audioStreamControl setVolume e:${e.toString()});}}}// 不需要该播放器则需要调用该方法overridevoid dispose() {if (_soundpool ! null) {_soundpool!.dispose();}}
}三、小结
flutter开发实战-实现音效soundpool播放音频及控制播放、暂停、停止、设置音量等控制操作。
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