的Android MediaPlayer.getCurrentPosition（）返回不正確的值

我正在寫短音頻持續時間（通常爲1-5秒）音頻播放器如下的Android MediaPlayer.getCurrentPosition（）返回不正確的值

//start media player 
mediaPlayer = new MediaPlayer(); 
mediaPlayer.setDataSource(context, Uri.fromFile(audioCache)); 
mediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC); 
mediaPlayer.setOnCompletionListener(new   MediaPlayer.OnCompletionListener() { 
    @Override 
    public void onCompletion(MediaPlayer mediaPlayer) { 
     stopPlaying(true); 
    } 
}); 
mediaPlayer.setOnPreparedListener(new MediaPlayer.OnPreparedListener() { 
    @Override 
    public void onPrepared(MediaPlayer mp) { 
     mediaPlayer.start(); 
     startPlayingTimer(); 
    } 
}); 
mediaPlayer.prepareAsync(); 


int UI_UPDATE_FREQ = 1000/ 60 + 1; 

private void startPlayingTimer() { 
    playerRunnable = new Runnable() { 
     @Override 
     public void run() { 
      uiHandler.post(updateWaveRunnable); 
      handler.postDelayed(this, UI_UPDATE_FREQ); 
     } 
    }; 
    handler.postDelayed(playerRunnable, UI_UPDATE_FREQ); 

} 

Runnable updateWaveRunnable = new Runnable() { 
    @Override 
    public void run() { 
      int position = mediaPlayer.getCurrentPosition(); 
      updateDurationLabel(position); 
     } 

    } 
};

的問題是，mediaPlayer.getCurrentPosition（）返回閃光值

curPos/total: 1/1003 /(AudioView.java:323) 
curPos/total: 13/1003 /(AudioView.java:323) 
curPos/total: 34/1003 /(AudioView.java:323) 
curPos/total: 55/1003 /(AudioView.java:323) 
curPos/total: 76/1003 /(AudioView.java:323) 
curPos/total: 97/1003 /(AudioView.java:323) 
curPos/total: 117/1003 /(AudioView.java:323) 
curPos/total: 139/1003 /(AudioView.java:323) 
curPos/total: 159/1003 /(AudioView.java:323) 
curPos/total: 179/1003 /(AudioView.java:323) 
curPos/total: 199/1003 /(AudioView.java:323) 
curPos/total: 226/1003 /(AudioView.java:323) 
curPos/total: 246/1003 /(AudioView.java:323) 
-> values jump back to smaller one 
curPos/total: 162/1003 /(AudioView.java:323) 
curPos/total: 185/1003 /(AudioView.java:323) 
curPos/total: 203/1003 /(AudioView.java:323) 
curPos/total: 223/1003 /(AudioView.java:323) 
curPos/total: 242/1003 /(AudioView.java:323) 
curPos/total: 263/1003 /(AudioView.java:323) 
curPos/total: 290/1003 /(AudioView.java:323) 
curPos/total: 312/1003 /(AudioView.java:323) 
curPos/total: 332/1003 /(AudioView.java:323) 
curPos/total: 352/1003 /(AudioView.java:323) 
curPos/total: 372/1003 /(AudioView.java:323) 
curPos/total: 392/1003 /(AudioView.java:323) 
curPos/total: 412/1003 /(AudioView.java:323) 
curPos/total: 431/1003 /(AudioView.java:323) 
curPos/total: 452/1003 /(AudioView.java:323) 
curPos/total: 472/1003 /(AudioView.java:323) 
curPos/total: 492/1003 /(AudioView.java:323) 
curPos/total: 512/1003 /(AudioView.java:323) 
curPos/total: 534/1003 /(AudioView.java:323) 
curPos/total: 554/1003 /(AudioView.java:323) 
curPos/total: 574/1003 /(AudioView.java:323) 
curPos/total: 595/1003 /(AudioView.java:323) 
curPos/total: 615/1003 /(AudioView.java:323) 
curPos/total: 635/1003 /(AudioView.java:323) 
curPos/total: 655/1003 /(AudioView.java:323) 
curPos/total: 675/1003 /(AudioView.java:323) 
curPos/total: 697/1003 /(AudioView.java:323) 
curPos/total: 716/1003 /(AudioView.java:323) 
curPos/total: 736/1003 /(AudioView.java:323) 
curPos/total: 756/1003 /(AudioView.java:323) 
curPos/total: 776/1003 /(AudioView.java:323) 
curPos/total: 796/1003 /(AudioView.java:323) 
curPos/total: 821/1003 /(AudioView.java:323) 
curPos/total: 837/1003 /(AudioView.java:323) 
curPos/total: 857/1003 /(AudioView.java:323) 
curPos/total: 877/1003 /(AudioView.java:323) 
curPos/total: 897/1003 /(AudioView.java:323) 
curPos/total: 917/1003 /(AudioView.java:323) 
curPos/total: 938/1003 /(AudioView.java:323) 
curPos/total: 958/1003 /(AudioView.java:323) 
curPos/total: 978/1003 /(AudioView.java:323) 
curPos/total: 981/1003 /(AudioView.java:323)

這會導致UI滯後/錯誤。我看到有關Android問題的報告，但沒有給出解決方案：https://code.google.com/p/android/issues/detail?id=2559。

任何幫助？

來源

2017-04-03 Bao Le

如果將UI_UPDATE_FREQ設置爲500ms，是否會發生同樣的問題。顯然這是一個衆所周知的錯誤。嘗試更改音頻文件採樣率。 –

增加UI_UPDATE_FREQ = 80後問題消失。如果我改變錄製採樣率，UI_UPDATE_FREQ也會改變（取決於採樣率的上升或下降）以避免問題 –

ExoPlayer是MediaPlayer的一個很好的選擇。它至少解決了我的問題。

來源

2017-04-04 14:44:40

的Android MediaPlayer.getCurrentPosition（）返回不正確的值

回答

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