Android 如何获取音频流的持续时间并从任意点继续音频流
说明：Android 如何获取音频流的持续时间并从任意点继续音频流,android,audio-streaming,android-mediaplayer,Android,Audio Streaming,Android Mediaplayer,说明： public class MyAudioPlayer extends Activity implements OnClickListener{ MediaPlayer mediaPlayer = null; private boolean isPaused=false; private boolean isStop = true; String filePath = null; String productName = null;
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);
}
}
};
}
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);
}
}
};
}
- 当我从互联网服务器（比如s3 bucket）传输音频文件时 它正确地开始流式处理
- 但是mediaPlayer.getDuration（）和mediaPlayer.getCurrentPosition（） 返回错误的值。在流媒体的开始 getCurrentPosition（）返回5小时
- 由于这个原因，我无法继续从音频流 指定的流持续时间（0到流持续时间）
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);
}
}
};
}
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);
}
}
};
}
第一个大问题是初始化顺序： 在resetAndStartPlayer中实际调用setDataSource之前，先调用getDuration。 没有数据源，MediaPlayer如何知道持续时间 以下是如何正确地做到这一点：
- getDuration在调用prepare后工作
- 准备可能需要更长的时间，应该在其他线程中调用
- 您还可以使用prepareAsync并避免AsyncTask，然后使用setOnPreparedListener回调调用getDuration
- 希望它能解决您的问题
1）音频流的持续时间和进度
我已经查看了你的代码，你在计算时间的代码中有一个重大错误。创建新日期（持续时间单位：百万）。Date添加您的本地性，即GMT+XX小时，这就是为什么您在开始流媒体时获得5小时。您应该使用以下方法来计算当前进度/持续时间
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",
currentMint,currentSec, durationMint,durationSec));
}
}
MediaPlayer允许清除音频流。我已经在我的一个项目中实现了它，但这需要一些时间。从另一个位置恢复音频流需要一些时间。感谢您对解决此问题的兴趣。在mediaPlayer.onPrepared（）中准备好mediaPlayer后，我已将代码修改为getDuration。。。正如我提到的，问题在于音频流，它仍然存在。当我流的音频甚至更小。GetDuration返回给我6小时之类的时间。但是当我从SD卡播放音频时，相同的代码返回正确的持续时间。发布远程流的url示例。@Arif:我正在创建一个mediaplayer，如果您解决了这个问题，您会通过电子邮件将代码发送给我吗？abuhamzah09在gmail.com什么控件是
LTDAudioPlayer