我编写了一个应用程序，使用surfaceview和mediaplayer播放来自Url的视频。当我播放3个视频网址时，下一个视频网址只有没有图像的声音。当我按下后退按钮停止媒体播放器时，声音仍然存在。我通过任务管理器删除了应用程序，但声音仍然存在。 Logcat抛出下面的bug：
11-05 09：55：40.340：E / MediaPlayer（5077）：停止在状态0中调用
11-05 09：55：40.340：E / MediaPlayer（5077）：错误（-38,0）
我的代码：
public class ChannelDetailActivity extends FragmentActivity {
public static final String CHANNEL_ID = "channelid";
private int channel_id;
private TextView ab_title;
private TextView mStartTime;
private TextView mEndTime;
private ImageView mPlayBtn;
// private ProgressBar progress_loading;
public String Urltoken;
public String Urlvideo;
private String userToken;
private Utilities utils;
private ViewPager mViewPager;
private PagerAdapter mPagerAdapter;
private RadioGroup rdgVideoBtn;
private TappableSurfaceView mSurfaceView;
private RelativeLayout mBottomController;
private Animation mAnimFadeOut;
private RelativeLayout comment_container;
private VideoView vd;
private Handler mHandler = new Handler();
/*
* Switch screen between portrait and landscape
*/
private OnClickListener mOnFullScreenBtnListener = new OnClickListener() {
@Override
public void onClick(View v) {
Display display = ((WindowManager)getSystemService(WINDOW_SERVICE))
.getDefaultDisplay();
int orientation = display.getRotation();
switch (orientation) {
case Surface.ROTATION_0:
setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);
break;
case Surface.ROTATION_90:
setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
break;
}
}
};
protected OnErrorListener mOnErrorListener = new OnErrorListener() {
@Override
public boolean onError(MediaPlayer mp, int what, int extra) {
mHandler.removeCallbacksAndMessages(mUpdateTimeTask);
return false;
}
};
/*
* runnerable to display time on video
*/
private Runnable mUpdateTimeTask = new Runnable() {
public void run() {
long totalDuration = mMediaPlayer.getDuration();
long currentDuration = mMediaPlayer.getCurrentPosition();
if (totalDuration == 0 && !mEndTime.getText().equals("LIVE")) {
mEndTime.setText("LIVE");
}
if (currentDuration > 0) {
progress_loading.setVisibility(View.GONE);
}
mStartTime.setText("" + utils.milliSecondsToTimer(currentDuration));
mHandler.postDelayed(this, 100);
}
};
private MediaPlayer.OnPreparedListener mOnPreparedListener = new MediaPlayer.OnPreparedListener() {
@Override
public void onPrepared(MediaPlayer mp) {
mPlayBtn.setOnClickListener(OnPlayBtnListener);
mMediaPlayer.start();
mHandler.postDelayed(mUpdateTimeTask, 100);
}
};
/*
* click to play video
*/
private OnClickListener OnPlayBtnListener = new OnClickListener() {
@Override
public void onClick(View v) {
if (mMediaPlayer == null) {
mPlayBtn.setOnClickListener(null);
playVideo(videoUrl);
return;
}
if (mMediaPlayer.isPlaying()) {
mMediaPlayer.pause();
mPlayBtn.setImageResource(R.drawable.ic_media_play);
} else {
mMediaPlayer.start();
mPlayBtn.setImageResource(android.R.drawable.ic_media_pause);
}
}
};
protected boolean isShowController;
/*
* an hien mediacontroller khi an vao man hinh player
*/
private TapListener onTouchListener = new TapListener() {
@Override
public void onTap(MotionEvent event) {
if (!isShowController) {
mBottomController.setVisibility(View.VISIBLE);
mHandler.postDelayed(mHideMediaController, 3000);
}
}
};
protected MediaPlayer mMediaPlayer;
private Callback mSurfaceHolderCallback = new Callback() {
@Override
public void surfaceChanged(SurfaceHolder surfaceholder, int arg1,
int arg2, int arg3) {
mSurfaceHolder = surfaceholder;
if (mMediaPlayer != null) {
mMediaPlayer.setDisplay(surfaceholder);
}
}
@Override
public void surfaceCreated(SurfaceHolder arg0) {
Log.d("surfaceCreated", "surfaceCreated");
}
@Override
public void surfaceDestroyed(SurfaceHolder arg0) {
Log.d("surfaceDestroyed", "surfaceDestroyed");
}
};
private ProgressBar progress_loading;
private ImageView mFullScreenBtn;
private SurfaceHolder mSurfaceHolder;
private RelativeLayout RLpager;
private int width_pager,height_pager;
@SuppressWarnings("deprecation")
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_channel_detail_fix);
Bundle extras = getIntent().getExtras();
userToken = ((GlobalApp) getApplication()).getUserToken();
utils = new Utilities();
getActionBar().setDisplayOptions(ActionBar.DISPLAY_SHOW_CUSTOM);
getActionBar().setCustomView(R.layout.ab_detail_custom);
RLpager = (RelativeLayout) findViewById(R.id.comment_container);
width_pager = getWindowManager().getDefaultDisplay().getWidth();
height_pager = getWindowManager().getDefaultDisplay().getHeight();
ab_title = (TextView) findViewById(R.id.tv_ab_title);
if (extras != null) {
channel_id = extras.getInt(ChannelDetailActivity.CHANNEL_ID);
}
mViewPager = (ViewPager) findViewById(R.id.vp_channel_detail);
mViewPager.setOnPageChangeListener(mOnViewPagerChangeListener);
List<Fragment> fragments = new Vector<Fragment>();
fragments.add(Fragment.instantiate(this,
EPGByChannelFragment.class.getName(), extras));
fragments.add(Fragment.instantiate(this,
ChannelCommentFragment.class.getName(), extras));
mPagerAdapter = new PagerAdapter(getSupportFragmentManager(), fragments);
mViewPager.setAdapter(mPagerAdapter);
comment_container = (RelativeLayout) findViewById(R.id.comment_container);
rdgVideoBtn = (RadioGroup) findViewById(R.id.rg_video_btn);
rdgVideoBtn.setOnCheckedChangeListener(mRadioGroupVideoListener);
mSurfaceView = (TappableSurfaceView) findViewById(R.id.surface_view);
mSurfaceView.addTapListener(onTouchListener);
mStartTime = (TextView) findViewById(R.id.tv_video_start_time);
mEndTime = (TextView) findViewById(R.id.tv_video_end_time);
mPlayBtn = (ImageView) findViewById(R.id.iv_video_play);
progress_loading = (ProgressBar) findViewById(R.id.player_progress);
mFullScreenBtn = (ImageView) findViewById(R.id.iv_video_small_zoom);
mFullScreenBtn.setOnClickListener(mOnFullScreenBtnListener);
mSurfaceHolder = mSurfaceView.getHolder();
mSurfaceHolder.addCallback(mSurfaceHolderCallback);
mSurfaceHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
mBottomController = (RelativeLayout) findViewById(R.id.bottom_info);
mAnimFadeOut = AnimationUtils.loadAnimation(this,
android.R.anim.fade_out);
}
@Override
protected void onStart() {
super.onStart();
getChannelInfo();
}
protected String videoUrl;
private void getChannelInfo() {
TimeTVApiCaller.getInstance().getChannel(channel_id, this,
new AjaxCallback<ChannelInfo>() {
@Override
public void callback(String url, ChannelInfo object,
AjaxStatus status) {
if (object != null) {
videoUrl = object.getChannelUrls().get(0).getPath();
mPlayBtn.setOnClickListener(OnPlayBtnListener);
ab_title.setText(object.getName());
/*
* Auto play video
*/
playVideo(videoUrl);
}
}
});
}
protected void playVideo(String url) {
mHandler.postDelayed(mHideMediaController, 3000);
mPlayBtn.setImageResource(android.R.drawable.ic_media_pause);
progress_loading.setVisibility(View.VISIBLE);
TimeTVApiCaller.getInstance().getChannelStream(url, this,
new AjaxCallback<String>() {
@Override
public void callback(String url, String object,
AjaxStatus status) {
String path_stream = object.replace("\"", "");
mMediaPlayer = new MediaPlayer();
mMediaPlayer.setOnPreparedListener(mOnPreparedListener);
mMediaPlayer.setOnErrorListener(mOnErrorListener);
mMediaPlayer.setOnCompletionListener(new OnCompletionListener() {
@Override
public void onCompletion(MediaPlayer mp) {
// TODO Auto-generated method stuber
mMediaPlayer.stop();
}
});
try {
mMediaPlayer.setDataSource(path_stream);
mSurfaceView.setDrawingCacheEnabled(true);
mSurfaceView.setDrawingCacheQuality(SurfaceView.DRAWING_CACHE_QUALITY_HIGH);
mSurfaceView.setDrawingCacheBackgroundColor(Color.BLACK);
mSurfaceView.setDuplicateParentStateEnabled(true);
} catch (IllegalArgumentException e) {
e.printStackTrace();
} catch (SecurityException e) {
e.printStackTrace();
} catch (IllegalStateException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
mMediaPlayer.setDisplay(mSurfaceHolder);
mMediaPlayer
.setAudioStreamType(AudioManager.STREAM_MUSIC);
mMediaPlayer.setScreenOnWhilePlaying(true);
mMediaPlayer.prepareAsync();
mMediaPlayer.setOnVideoSizeChangedListener(new OnVideoSizeChangedListener() {
@Override
public void onVideoSizeChanged(MediaPlayer mp, int width, int height) {
// TODO Auto-generated method stub
int width_SurfaceView = mSurfaceView.getWidth();
int height_SurfaceView = mSurfaceView.getHeight();
float boxWidth = width_SurfaceView;
float boxHeight = height_SurfaceView;
float videoWidth = mMediaPlayer.getVideoWidth();
float videoHeight = mMediaPlayer.getVideoHeight();
float wr = boxWidth/videoWidth;
float hr = boxHeight/videoHeight;
float ar = videoWidth/videoHeight;
if(wr > hr) width_SurfaceView = (int) (boxHeight * ar);
else height_SurfaceView = (int) (boxWidth / ar);
if(mMediaPlayer.isPlaying()){
mSurfaceHolder.setFixedSize(width_SurfaceView, height_SurfaceView);
}
}
});
}
});
}
TextView tv;
@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
// TODO Auto-generated method stub
Display display = ((WindowManager) getSystemService(WINDOW_SERVICE)).getDefaultDisplay();
int orientation = display.getRotation();
if((event.getAction()== KeyEvent.ACTION_DOWN)&&(keyCode == KeyEvent.KEYCODE_BACK))
{
if(orientation == Surface.ROTATION_0)
{
if(mMediaPlayer != null && mMediaPlayer.isPlaying())
{
mMediaPlayer.stop();
mMediaPlayer.setVolume(0, 0);
}
finish();
return true;
}
else
{
setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
return false;
}
}
return super.onKeyDown(keyCode, event);
}
/*
* switch to full screen when configuration changed
*
* @see
* android.support.v4.app.FragmentActivity#onConfigurationChanged(android
* .content.res.Configuration)
*/
@Override
public void onConfigurationChanged(Configuration newConfig) {
super.onConfigurationChanged(newConfig);
if (newConfig.orientation == Configuration.ORIENTATION_LANDSCAPE) {
getWindow().addFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN);
getWindow().clearFlags(
WindowManager.LayoutParams.FLAG_FORCE_NOT_FULLSCREEN);
getActionBar().hide();
comment_container.setVisibility(View.GONE);
} else if (newConfig.orientation == Configuration.ORIENTATION_PORTRAIT) {
getWindow().addFlags(
WindowManager.LayoutParams.FLAG_FORCE_NOT_FULLSCREEN);
getWindow().clearFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN);
getActionBar().show();
comment_container.setVisibility(View.VISIBLE);
}
}
private Runnable mHideMediaController = new Runnable() {
@Override
public void run() {
mBottomController.startAnimation(mAnimFadeOut);
mBottomController.setVisibility(View.INVISIBLE);
isShowController = false;
mHandler.removeCallbacks(mHideMediaController);
}
};
@Override
protected void onPause() {
if (mMediaPlayer != null && mMediaPlayer.isPlaying())
mMediaPlayer.pause();
super.onPause();
}
@Override
protected void onStop() {
if(mMediaPlayer != null && mMediaPlayer.isPlaying())
{
mMediaPlayer.setVolume(0, 0);
mMediaPlayer.stop();
mMediaPlayer.setAudioStreamType(RESULT_CANCELED);
}
finish();
super.onStop();
};
@Override
protected void onDestroy() {
// TODO Auto-generated method stub
super.onDestroy();
}
}
你能帮我解决一下吗？
答案 0 :(得分：0)
错误告诉您需要知道的一切。您在MediaPlayer空闲时调用stop（）。
在PC上而不是我的手机上查看您的代码后，我确信问题是您在stop()中致电OnCompletionListener。这完全没必要，因为媒体在进入回调时已经停止了。事实上，调用stop()会导致首先调用回调。
您应该能够使用logcat查明代码中发生错误的确切行。如果您发布该信息并指出错误在将来引用的行，将会很有帮助。