在android中播放mp3文件时更新进度条
我所拥有的： 我有一个媒体播放器的代码，缓冲的歌曲完美的链接下面 链接：在android中播放mp3文件时更新进度条,android,android-mediaplayer,Android,Android Mediaplayer,我所拥有的： 我有一个媒体播放器的代码，缓冲的歌曲完美的链接下面 链接：这是一首由谷歌硬盘托管的歌曲 SingleSongBuffering.java public class SingleSongBuffering extends Activity implements OnClickListener, OnTouchListener, OnCompletionListener, OnBufferingUpdateListener{ private ImageButton button
这是一首由谷歌硬盘托管的歌曲public class SingleSongBuffering extends Activity implements OnClickListener, OnTouchListener, OnCompletionListener, OnBufferingUpdateListener{
private ImageButton buttonPlayPause;
private SeekBar seekBarProgress;
public EditText editTextSongURL;
private MediaPlayer mediaPlayer;
private int mediaFileLengthInMilliseconds; // this value contains the song duration in milliseconds. Look at getDuration() method in MediaPlayer class
private final Handler handler = new Handler();
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.single_song_buffering);
initView();
}
/** This method initialise all the views in project*/
private void initView() {
buttonPlayPause = (ImageButton)findViewById(R.id.ButtonTestPlayPause);
buttonPlayPause.setOnClickListener(this);
seekBarProgress = (SeekBar)findViewById(R.id.SeekBarTestPlay);
seekBarProgress.setMax(99); // It means 100% .0-99
seekBarProgress.setOnTouchListener(this);
editTextSongURL = (EditText)findViewById(R.id.EditTextSongURL);
editTextSongURL.setText(R.string.testsong_20_sec);
mediaPlayer = new MediaPlayer();
mediaPlayer.setOnBufferingUpdateListener(this);
mediaPlayer.setOnCompletionListener(this);
}
/** Method which updates the SeekBar primary progress by current song playing position*/
private void primarySeekBarProgressUpdater() {
seekBarProgress.setProgress((int)(((float)mediaPlayer.getCurrentPosition()/mediaFileLengthInMilliseconds)*100)); // This math construction give a percentage of "was playing"/"song length"
if (mediaPlayer.isPlaying()) {
Runnable notification = new Runnable() {
public void run() {
primarySeekBarProgressUpdater();
}
};
handler.postDelayed(notification,1000);
}
}
@Override
public void onClick(View v) {
if(v.getId() == R.id.ButtonTestPlayPause){
/** ImageButton onClick event handler. Method which start/pause mediaplayer playing */
try {
mediaPlayer.setDataSource(editTextSongURL.getText().toString()); // setup song from http://www.hrupin.com/wp-content/uploads/mp3/testsong_20_sec.mp3 URL to mediaplayer data source
mediaPlayer.prepare(); // you must call this method after setup the datasource in setDataSource method. After calling prepare() the instance of MediaPlayer starts load data from URL to internal buffer.
} catch (Exception e) {
e.printStackTrace();
}
mediaFileLengthInMilliseconds = mediaPlayer.getDuration(); // gets the song length in milliseconds from URL
if(!mediaPlayer.isPlaying()){
mediaPlayer.start();
buttonPlayPause.setImageResource(R.drawable.button_pause);
}else {
mediaPlayer.pause();
buttonPlayPause.setImageResource(R.drawable.button_play);
}
primarySeekBarProgressUpdater();
}
}
@Override
public boolean onTouch(View v, MotionEvent event) {
if(v.getId() == R.id.SeekBarTestPlay){
/** Seekbar onTouch event handler. Method which seeks MediaPlayer to seekBar primary progress position*/
if(mediaPlayer.isPlaying()){
SeekBar sb = (SeekBar)v;
int playPositionInMillisecconds = (mediaFileLengthInMilliseconds / 100) * sb.getProgress();
mediaPlayer.seekTo(playPositionInMillisecconds);
}
}
return false;
}
@Override
public void onCompletion(MediaPlayer mp) {
/** MediaPlayer onCompletion event handler. OMethod which calls then song playing is complete*/
buttonPlayPause.setImageResource(R.drawable.button_play);
}
@Override
public void onBufferingUpdate(MediaPlayer mp, int percent) {
/** Method which updates the SeekBar secondary progress by current song loading from URL position*/
seekBarProgress.setSecondaryProgress(percent);
}
}
什么在起作用： 我能够播放歌曲并播放/暂停歌曲 什么不起作用： 进度条部分不工作！ 1.进度条不会从一开始就更新其在进度行末尾的位置 我想要什么： 进度条部分工作，以便我可以拖动进度，以便从该点播放歌曲 如何解决此问题？
进度条部分不工作！1.进度条未更新其 从一开始就在进度线的末尾 **在测试2到3个URL之后 如果分配给MediaPlayer数据源的曲目（url）没有提供曲目信息，则Buffer listner不会给出百分比 您可以像这样进行测试：在为流媒体设置数据源（url）后，一旦mediaplyer开始付费，检查mediaplayer trackDuration（mPlayer.getDuration）是否给出了该曲目的正确持续时间 因为如果轨道持续时间不正确，thn缓冲级别也将不正确 因此，问题可能来自轨迹b，而不是进度条 在下面的代码中，一个url带有曲目详细信息，在播放器准备好并启动后提供曲目持续时间（签入
onPrepared（MediaPlayer mp） private MediaPlayer mPlayer;
private void playMusic() {
try {
mPlayer = new MediaPlayer();
// For testing purpose added below url
/**
* Its not like mp3 or particular coded url will return duration and track info.
* streaming url should also provide details.
*
* mPlayer.setDataSource("http://50.117.115.210/");
*
* Url which is not providing track details and other information,so
* here we are not getting track duration and bcz of that buffering
* update will not be correct.
*
* */
/**
* mPlayer.setDataSource("http://www.samisite.com/sound/cropShadesofGrayMonkees.mp3");
* This is providing correct details of the track which is going to play.
*
*/
mPlayer.setDataSource("http://www.samisite.com/sound/cropShadesofGrayMonkees.mp3");
mPlayer.prepareAsync();
mPlayer.setOnPreparedListener(new OnPreparedListener() {
public void onPrepared(MediaPlayer mp) {
mPlayer.start();
}
});
mPlayer.setOnBufferingUpdateListener(new OnBufferingUpdateListener() {
public void onBufferingUpdate(MediaPlayer mp, int percent) {
// Media player will required Track's information to give
// you buffering percentage. So once check after starting
// player are you getting track duration from
// MediaPlayer.getDuration()
Log.e("onBufferingUpdate", "" + percent);
seekBar.setSecondaryProgress(percent);
// *****
// Buffering update will be correct if mp.getDuration() > 0
// double ratio = percent / 100.0;
// int bufferingpercent = (int) (mp.getDuration() * ratio);
}
});
} catch (Exception e) {
e.printStackTrace();
}
}
private OnSeekBarChangeListener seekbarListner = new OnSeekBarChangeListener() {
@Override
public void onStopTrackingTouch(SeekBar seekBar) {
}
@Override
public void onStartTrackingTouch(SeekBar seekBar) {
}
@Override
public void onProgressChanged(SeekBar seekBar, int progress,
boolean fromUser) {
if (fromUser) {
if (mPlayer != null) {
if (progress <= seekBar.getSecondaryProgress()) {
} else {
seekBar.setProgress(progress);
}
}
}
}
};
私有媒体播放器mPlayer；
私人音乐{
试一试{
mPlayer=新媒体播放器（）；
//为了测试目的，在url下面添加了
/**
*它不像mp3或特定编码的url会返回持续时间和曲目信息。
*流式url还应提供详细信息。
*
*mPlayer.setDataSource（“http://50.117.115.210/");
*
*Url，它不提供跟踪详细信息和其他信息，所以
*这里我们没有得到缓冲区的跟踪持续时间和bcz
*更新将不正确。
*
* */
/**
*mPlayer.setDataSource（“http://www.samisite.com/sound/cropShadesofGrayMonkees.mp3");
*这提供了将要播放的曲目的正确细节。
*
*/
mPlayer.setDataSource（“http://www.samisite.com/sound/cropShadesofGrayMonkees.mp3");
mPlayer.prepareAsync（）；
mPlayer.setOnPreparedListener（新的OnPreparedListener（）{
已准备好公开作废（MediaPlayer mp）{
mPlayer.start（）；
}
});
mPlayer.setOnBufferingUpdateListener（新的OnBufferingUpdateListener（）{
public void onBufferingUpdate（MediaPlayer mp，整数百分比）{
//媒体播放器需要提供曲目的信息
//您需要检查缓冲百分比。因此，启动后请检查一次
//你是从哪个玩家那里获得曲目持续时间的
//MediaPlayer.getDuration（）
Log.e（“onBufferingUpdate”，即“+百分比”）；
seekBar.setSecondaryProgress（百分比）；
// *****
//如果mp.getDuration（）大于0，则缓冲更新将是正确的
//双倍比率=百分比/100.0；
//int bufferingpercent=（int）（mp.getDuration（）*比率）；
}
});
}捕获（例外e）{
e、 printStackTrace（）；
}
}
private onseekbarchaneglistener seekbarListner=new onseekbarchaneglistener（）{
@凌驾
TopTrackingTouch（SeekBar SeekBar）上的公共无效{
}
@凌驾
开始跟踪触摸时的公共无效（SeekBar SeekBar）{
}
@凌驾
更改了公共进程无效（SeekBar SeekBar，int progress，
布尔值（用户）{
如果（来自用户）{
if（mPlayer！=null）{
如果（你正在使用的进度发布url。。。