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我正在開發基於android的應用程序，即播放視頻。當我播放任何視頻時，它會啓動它，然後我按後退按鈕並返回屏幕以選擇另一個播放（停止第一個視頻）（當我選擇第二個視頻時，第一個視頻（已播放））凍結和第二個視頻開始在這第一個視頻背後，我可以聽第二個視頻的音樂等，任何一個可以幫助如何停止和刪除媒體播放器的視頻，以便用戶可以觀看新視頻 這是我的活動Android媒體播放器視頻問題（當我玩第二個時，第一個視頻會被凍結）
public class TrailVideoActivity extends Activity implements
OnBufferingUpdateListener, OnCompletionListener,
OnPreparedListener, OnVideoSizeChangedListener, SurfaceHolder.Callback{
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_NO_TITLE);
getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN);
setVolumeControlStream(AudioManager.STREAM_MUSIC);
PowerManager powerManager = (PowerManager) getSystemService(Context.POWER_SERVICE);
wakeLock = powerManager.newWakeLock(PowerManager.FULL_WAKE_LOCK, "MyMediaPlayer");
//setContentView(R.layout.main);
setContentView(LayoutInflater.from(getParent()).inflate(R.layout.trial_video_player, null));
mPreview = (SurfaceView) findViewById(R.id.surface_view);
holder = mPreview.getHolder();
holder.addCallback(this);
holder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
}
private void playMediaPlayerVideo() {
Log.d(TAG, "playMediaPlayerVideo called");
doCleanUp();
try {
if (videoURL == "") {
// Tell the user to provide a media file URL.
Toast.makeText(this,"Please edit MediaPlayerDemo_Video Activity,"
+ " and set the path variable to your media file URL.",
Toast.LENGTH_LONG).show();
}
Log.d("TrailVideoActivity", videoURL);
// Create a new media player and set the listeners
mMediaPlayer = new MediaPlayer();
mMediaPlayer.setDataSource(videoURL);
mMediaPlayer.setDisplay(holder);
mMediaPlayer.prepareAsync();
mMediaPlayer.setOnBufferingUpdateListener(this);
mMediaPlayer.setOnCompletionListener(this);
mMediaPlayer.setOnPreparedListener(this);
mMediaPlayer.setOnVideoSizeChangedListener(this);
//mMediaPlayer.setVideoQuality(MediaPlayer.VIDEOQUALITY_HIGH);
//mMediaPlayer.setScreenOnWhilePlaying(true);
//mMediaPlayer.setLooping(true);
mMediaPlayer.setAudioStreamType(2);
} catch (Exception e) {
Log.e(TAG, "error: " + e.getMessage(), e);
}
}
public void onBufferingUpdate(MediaPlayer arg0, int percent) {
Log.d(TAG, "onBufferingUpdate percent:" + percent);
}
public void onCompletion(MediaPlayer arg0) {
Log.d(TAG, "onCompletion called");
}
public void onVideoSizeChanged(MediaPlayer mp, int width, int height) {
Log.v(TAG, "onVideoSizeChanged called");
if (width == 0 || height == 0) {
Log.e(TAG, "invalid video width(" + width + ") or height(" + height + ")");
return;
}
mIsVideoSizeKnown = true;
mVideoWidth = width;
mVideoHeight = height;
if (mIsVideoReadyToBePlayed && mIsVideoSizeKnown) {
startVideoPlayback();
}
}
public void onPrepared(MediaPlayer mediaplayer) {
Log.d(TAG, "onPrepared called");
mIsVideoReadyToBePlayed = true;
if (mIsVideoReadyToBePlayed && mIsVideoSizeKnown) {
startVideoPlayback();
}
}
public void surfaceChanged(SurfaceHolder surfaceholder, int i, int j, int k) {
Log.d(TAG, "surfaceChanged called");
}
public void surfaceDestroyed(SurfaceHolder surfaceholder) {
Log.d(TAG, "surfaceDestroyed called");
}
public void surfaceCreated(SurfaceHolder holder) {
Log.d(TAG, "surfaceCreated called");
playMediaPlayerVideo();
}
@Override
protected void onPause() {
Log.d(TAG, "onPause called");
super.onPause();
releaseMediaPlayer();
doCleanUp();
}
@Override
protected void onDestroy() {
Log.d(TAG, "onDestroy called");
super.onDestroy();
releaseMediaPlayer();
doCleanUp();
}
private void releaseMediaPlayer() {
Log.d(TAG, "releaseMediaPlayer called");
if (mMediaPlayer != null) {
mMediaPlayer.release();
mMediaPlayer = null;
}
}
private void doCleanUp() {
Log.d(TAG, "doCleanUp called");
mVideoWidth = 0;
mVideoHeight = 0;
mIsVideoReadyToBePlayed = false;
mIsVideoSizeKnown = false;
}
private void startVideoPlayback() {
Log.v(TAG, "startVideoPlayback");
holder.setFixedSize(mVideoWidth, mVideoHeight);
/*holder.setKeepScreenOn(false);
holder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);*/
mMediaPlayer.start();
app.dismissDialog();
}
}
在此先感謝。