从停止的位置Android的媒体播放器搜索栏比赛 [英] Android Media player seekbar play from stopped position
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问题描述
我试图通过使用搜索栏监听器来播放一首歌曲。但是，当我试图拖动进度条，然后将其从歌曲开始播放。它需要从拖动位置播放。
I am trying to play a song by using seek bar listener. But when I try to drag the progress bar then it is playing from beginning of the song. It need to play from that dragged position.
下面是我的code：
public class MainActivity extends Activity {
private TextView prairText;
private AssetFileDescriptor descriptor;
private SeekBar seekBar;
private MediaPlayer mp = new MediaPlayer();
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
// Keep screen active
getWindow().addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);
findViewById(R.id.play_button).setVisibility(View.INVISIBLE);
findViewById(R.id.pauseButton).setVisibility(View.VISIBLE);
init();
// Play prayer
/*if (mp != null) {
mp.start();
}*/
seekBar.setOnSeekBarChangeListener(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 (mp != null && fromUser) {
mp.seekTo(progress * 1000);
}
}
});
findViewById(R.id.play_button).setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
if (mp != null) {
mp.start();
final Handler mHandler = new Handler();
//Make sure you update Seekbar on UI thread
MainActivity.this.runOnUiThread(new Runnable() {
@Override
public void run() {
if(mp != null){
int mCurrentPosition = mp.getCurrentPosition() / 1000;
seekBar.setProgress(mCurrentPosition);
}
mHandler.postDelayed(this, 1000);
}
});
findViewById(R.id.play_button).setVisibility(View.INVISIBLE);
findViewById(R.id.pauseButton).setVisibility(View.VISIBLE);
}
}
});
findViewById(R.id.pauseButton).setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
if (mp != null) {
mp.pause();
findViewById(R.id.pauseButton).setVisibility(View.INVISIBLE);
findViewById(R.id.play_button).setVisibility(View.VISIBLE);
}
mp.pause();
}
});
findViewById(R.id.restart_button).setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
if (mp != null) {
mp.seekTo(0);
mp.start();
findViewById(R.id.play_button).setVisibility(View.INVISIBLE);
findViewById(R.id.pauseButton).setVisibility(View.VISIBLE);
}
}
});
private void init() {
prairText = (TextView) findViewById(R.id.prairText);
seekBar = (SeekBar) findViewById(R.id.seekBar1);
try {
descriptor = getAssets().openFd("mysong.mp3");
mp.setDataSource(descriptor.getFileDescriptor(), descriptor.getStartOffset(), descriptor.getLength());
descriptor.close();
mp.prepare();
} catch (Exception e) {
e.printStackTrace();
}
seekBar.setMax(mp.getDuration());
}
如何解决这个问题。在此先感谢..
How to resolve this issue. Thanks in advance..
推荐答案
下面我做了招数：
-
感动的MediaPlayer实例init（）方法
Moved MediaPlayer instance to init() method
改变了这一行
INT mCurrentPosition = mMediaPlayer.getCurrentPosition（）/ 1000;
int mCurrentPosition = mMediaPlayer.getCurrentPosition() / 1000;
到
INT mCurrentPosition = mp.getCurrentPosition（）;
int mCurrentPosition = mp.getCurrentPosition();
- 改变这一行
mp.seekTo（进度* 1000）;
mp.seekTo(progress * 1000);
到
mp.seekTo（进度）;
mp.seekTo(progress);
最后工作code将是：
Finally working Code will be:
public class MainActivity extends Activity {
private TextView prairText;
private AssetFileDescriptor descriptor;
private SeekBar seekBar;
private MediaPlayer mp;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
// Keep screen active
getWindow().addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);
findViewById(R.id.play_button).setVisibility(View.INVISIBLE);
findViewById(R.id.pauseButton).setVisibility(View.VISIBLE);
init();
// Play song
if (mp != null) {
mp.start();
}
final Handler mHandler = new Handler();
//Make sure you update Seek bar on UI thread
MainActivity.this.runOnUiThread(new Runnable() {
@Override
public void run() {
if(mp != null){
int mCurrentPosition = mp.getCurrentPosition();
seekBar.setProgress(mCurrentPosition);
}
mHandler.postDelayed(this, 1000);
}
});
seekBar.setOnSeekBarChangeListener(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 (mp != null && fromUser) {
mp.seekTo(progress);
mp.start();
findViewById(R.id.play_button).setVisibility(View.INVISIBLE);
findViewById(R.id.pauseButton).setVisibility(View.VISIBLE);
}
}
});
findViewById(R.id.play_button).setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
if (mp != null) {
mp.start();
findViewById(R.id.play_button).setVisibility(View.INVISIBLE);
findViewById(R.id.pauseButton).setVisibility(View.VISIBLE);
}
}
});
findViewById(R.id.pauseButton).setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
if (mp != null) {
mp.pause();
findViewById(R.id.pauseButton).setVisibility(View.INVISIBLE);
findViewById(R.id.play_button).setVisibility(View.VISIBLE);
}
mp.pause();
}
});
findViewById(R.id.restart_button).setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
if (mp != null) {
mp.seekTo(0);
mp.start();
findViewById(R.id.play_button).setVisibility(View.INVISIBLE);
findViewById(R.id.pauseButton).setVisibility(View.VISIBLE);
}
}
});
private void init() {
mp = new MediaPlayer();
mp.reset();
prairText = (TextView) findViewById(R.id.prairText);
seekBar = (SeekBar) findViewById(R.id.seekBar1);
try {
descriptor = getAssets().openFd("mysong.mp3");
mp.setDataSource(descriptor.getFileDescriptor(), descriptor.getStartOffset(), descriptor.getLength());
descriptor.close();
mp.prepare();
} catch (Exception e) {
e.printStackTrace();
}
int duration = mp.getDuration();
seekBar.setMax(duration);
}
}
注意：不要忘了把mysong.mp3在资产文件夹
Note: Don't forget to put mysong.mp3 in assets folder
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