描述：
我有一个音频播放器的以下代码.我可以通过点击进度栏(0到to-mediaplayer.getDuration())之间的任何时间段继续音频播放.它对于音频播放工作正常.
音频流中的问题：
>当我从互联网服务器(比如s3-bucket)流式传输音频文件时
它开始流正确.
>但是mediaPlayer.getDuration()和mediaPlayer.getCurrentPosition()
返回错误的值.在流媒体开始
mediaPlayer.getCurrentPosition()返回5小时.
>由于这个原因,我无法继续音频流
流(0到流持续时间)的指定持续时间.
问题：
>如何获取音频流的持续时间
>如何从指定的持续时间继续音频流.对于
例如,为10分钟的文件,我想从6开始流式传输
分钟.
码：
public class MyAudioPlayer extends Activity implements OnClickListener{ MediaPlayer mediaPlayer = null; private boolean isPaused=false; private boolean isStop = true; String filePath = null; String productName = null; ImageButton btnPlay = null; ImageButton btnPause = null; ImageButton btnReset = null; ImageButton btnStop = null; AudioManager audioManager = null; SeekBar volControl = null; SeekBar progressControl = null; TextView progressText = null; long durationInMillis = -1; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.ltd_audio_player); volControl = (SeekBar)findViewById(R.id.player_volume); progressControl = (SeekBar)findViewById(R.id.player_seekbar); progressText = (TextView) findViewById(R.id.player_progress_text); btnPlay = (ImageButton) findViewById(R.id.ic_player_play); btnPause = (ImageButton) findViewById(R.id.ic_player_pause); btnReset = (ImageButton) findViewById(R.id.ic_player_reset); btnStop = (ImageButton) findViewById(R.id.ic_player_stop); btnPlay.setOnClickListener(this); btnPause.setOnClickListener(this); btnReset.setOnClickListener(this); btnStop.setOnClickListener(this); filePath = getIntent().getExtras().getString("localPath"); this.setPlayer(); this.resetAndStartPlayer(); } @Override protected void onResume() { super.onResume(); isPaused=false; progressText.postDelayed(onEverySecond,1000); } @Override protected void onPause() { super.onPause(); isPaused=true; } private void setProgressControl() { int maxVolume = mediaPlayer.getDuration(); int curVolume = mediaPlayer.getCurrentPosition(); progressControl.setMax(maxVolume); progressControl.setProgress(curVolume); progressControl.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() { @Override public void onProgressChanged(SeekBar seekbar,int progress,boolean fromUser) { mediaPlayer.seekTo(progress); } @Override public void onStartTrackingTouch(SeekBar seekBar) { // TODO Auto-generated method stub } @Override public void onStopTrackingTouch(SeekBar seekBar) { // TODO Auto-generated method stub } }); } @Override public void onClick(View v) { switch(v.getId()){ case R.id.ic_player_play: if(isStop==true){ try { mediaPlayer.prepareAsync(); } catch (Exception e) { e.printStackTrace(); } }else{ mediaPlayer.start(); isStop = true; } break; case R.id.ic_player_pause: mediaPlayer.pause(); break; case R.id.ic_player_reset: mediaPlayer.seekTo(0); break; case R.id.ic_player_stop: isStop = true; progressControl.setProgress(0); mediaPlayer.stop(); break; } } private void resetAndStartPlayer(){ try { if(filePath!=null){ mediaPlayer.setDataSource(filePath); mediaPlayer.prepareAsync(); } } catch (Exception e) { e.printStackTrace(); } } private void setPlayer(){ getWindow().setFormat(PixelFormat.UNKNOWN); mediaPlayer = new MediaPlayer(); mediaPlayer.setOnBufferingUpdateListener(new OnBufferingUpdateListener() { @Override public void onBufferingUpdate(MediaPlayer mp,int percent) { progressControl.setSecondaryProgress((progressControl.getMax()/100)*percent); } }); mediaPlayer.setOnPreparedListener(new OnPreparedListener() { @Override public void onPrepared(MediaPlayer mp) { mediaPlayer.start(); isStop=false; durationInMillis = mediaPlayer.getDuration(); MyAudioPlayer.this.setProgressControl(); } }); mediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC); } @Override protected void onDestroy() { // TODO Auto-generated method stub mediaPlayer.release(); super.onDestroy(); } protected void setProgressText() { durationInMillis = mediaPlayer.getDuration(); int curVolume = mediaPlayer.getCurrentPosition(); long HOUR = 60*60*1000; if(progressText!=null){ if(durationInMillis>HOUR){ progressText.setText(String.format("%1$tH:%1$tM:%1$tS",new Date(curVolume)) +" / "+String.format("%1$tH:%1$tM:%1$tS",new Date(durationInMillis))); }else{ progressText.setText(String.format("%1$tM:%1$tS",new Date(curVolume)) +" / "+String.format("%1$tM:%1$tS",new Date(durationInMillis))); } } } private Runnable onEverySecond=new Runnable() { public void run() { if (mediaPlayer!=null) { progressControl.setProgress(mediaPlayer.getCurrentPosition()); MyAudioPlayer.this.setProgressText(); } if (!isPaused) { progressText.postDelayed(onEverySecond,1000); } } }; }
时间显示在进度条上方.
时间：’当前持续时间’/’总持续时间’
解决方法
希望它可以解决你的问题.
1)音频流的持续时间和进度
我已经查看了你的代码,你的代码中有一个重大错误来计算时间.您创建新的Date(durationInMillis).日期增加您的地点,即GMT XX小时,这就是为什么您在开始流式传播时间达到5个小时.您应该使用以下方法来计算currentProgress / duration.
protected void setProgressText() {
final int HOUR = 60*60*1000;
final int MINUTE = 60*1000;
final int SECOND = 1000;
int durationInMillis = mediaPlayer.getDuration();
int curVolume = mediaPlayer.getCurrentPosition();
int durationHour = durationInMillis/HOUR;
int durationMint = (durationInMillis%HOUR)/MINUTE;
int durationSec = (durationInMillis%MINUTE)/SECOND;
int currentHour = curVolume/HOUR;
int currentMint = (curVolume%HOUR)/MINUTE;
int currentSec = (curVolume%MINUTE)/SECOND;
if(durationHour>0){
System.out.println(" 1 = "+String.format("%02d:%02d:%02d/%02d:%02d:%02d",currentHour,currentMint,currentSec,durationHour,durationMint,durationSec));
}else{
System.out.println(" 1 = "+String.format("%02d:%02d/%02d:%02d",durationSec));
}
}
2)擦洗流.
MediaPlayer允许擦除音频流.我已经在我的一个项目中实施了它,但需要一些时间.从另一个位置恢复音频流需要一些时间.
