If you removed holder.addCallback(this), then the callback of surfaceCreated in MediaPlayerDemo_Video won't be invoked...
2009/3/5 susanner <[email protected]> > > I have met nearly the same problem, I am implementing the Mediaplayer to my > hardware board. I haven't tried videoview, I just implemented the video > player from API demo.But It can't show video. I guess there is some trick > with this "holder" surface, it is strange that when I delete this sentence, > my emulator will not show video just as the real board, > holder.addCallback(this); > but I added the sentence, although my emulator can successfully play > video, my real hardware still like before. > and I am a little bit curious you didn't use this > "holder.addCallback(this);" > here is my program, I haven't solved my problem yet: > > public class MediaPlayerDemo_Video extends Activity implements > OnBufferingUpdateListener, OnCompletionListener, > MediaPlayer.OnPreparedListener, SurfaceHolder.Callback { > > private static final String TAG = "MediaPlayerDemo"; > private int mVideoWidth; > private int mVideoHeight; > private MediaPlayer mMediaPlayer; > private SurfaceView mPreview; > private SurfaceHolder holder; > private String path; > private Bundle extras; > private static final String MEDIA = "media"; > private static final int LOCAL_AUDIO = 1; > private static final int STREAM_AUDIO = 2; > private static final int RESOURCES_AUDIO = 3; > private static final int LOCAL_VIDEO = 4; > private static final int STREAM_VIDEO = 5; > > /** > * > * Called when the activity is first created. > */ > public void onCreate(Bundle icicle) { > super.onCreate(icicle); > setContentView(R.layout.mediaplayer_2); > mPreview = (SurfaceView) findViewById(R.id.surface); > holder = mPreview.getHolder(); > holder.addCallback(this); > holder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS); > extras = getIntent().getExtras(); > > } > > private void playVideo(Integer Media) { > try { > > switch (Media) { > case LOCAL_VIDEO: > /* > * TODO: Set the path variable to a local media file > path. > */ > path = ""; > /* if (path == "") { > // Tell the user to provide a media file URL. > Toast > .makeText( > MediaPlayerDemo_Video.this, > "Please edit MediaPlayerDemo_Video > Activity, " > + "and set the path > variable to your media file path." > + " Your media file must be > stored on sdcard.", > Toast.LENGTH_LONG).show(); > > }*/ > break; > case STREAM_VIDEO: > /* > * TODO: Set path variable to progressive streamable > mp4 or > * 3gpp format URL. Http protocol should be used. > * Mediaplayer can only play "progressive streamable > * contents" which basically means: 1. the movie atom > has to > * precede all the media data atoms. 2. The clip has to > be > * reasonably interleaved. > * > */ > path = ""; > if (path == "") { > // Tell the user to provide a media file URL. > Toast > .makeText( > MediaPlayerDemo_Video.this, > "Please edit MediaPlayerDemo_Video > Activity," > + " and set the path > variable to your media file URL.", > Toast.LENGTH_LONG).show(); > > } > > break; > > > } > > // Create a new media player and set the listeners > mMediaPlayer = new MediaPlayer(); > AssetFileDescriptor afd = getResources().openRawResourceFd > (R.raw.movie); > Log.v(TAG,afd.toString()); > mMediaPlayer.setDataSource(afd.getFileDescriptor(), > afd.getStartOffset(), afd.getLength()); > > // mMediaPlayer.setDataSource(path); > mMediaPlayer.setDisplay(holder); > mMediaPlayer.prepare(); > mMediaPlayer.setOnBufferingUpdateListener(this); > mMediaPlayer.setOnCompletionListener(this); > > mMediaPlayer.setOnPreparedListener(this); > mMediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC); > Log.d(TAG, "mMediaPlayer.start is to be called"); > mMediaPlayer.start(); > > > } catch (Exception e) { > Log.e(TAG, "error: " + e.getMessage(), e); > } > } > > public void onBufferingUpdate(MediaPlayer arg0, int percent) { > Log.d(TAG, "onBufferingUpdate percent:" + percent); > > } > /** > * you don't call onPrepared() yourself. If you set an > *PreparedListener, its onPrepared() method will be called for you. > */ > public void onCompletion(MediaPlayer arg0) { > Log.d(TAG, "onCompletion called"); > } > > public void onPrepared(MediaPlayer mediaplayer) { > Log.d(TAG, "onPrepared called"); > mVideoWidth = mMediaPlayer.getVideoWidth(); > mVideoHeight = mMediaPlayer.getVideoHeight(); > if (mVideoWidth != 0 && mVideoHeight != 0) { > holder.setFixedSize(mVideoWidth, mVideoHeight); > > } > > } > > 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) { > // TODO Auto-generated method stub > Log.d(TAG, "surfaceCreated called"); > playVideo(extras.getInt(MEDIA)); > > > } > > @Override > protected void onDestroy() { > super.onDestroy(); > // TODO Auto-generated method stub > if (mMediaPlayer != null) { > mMediaPlayer.release(); > mMediaPlayer = null; > } > > } > > } > > > 在2009-03-04，zypsg <[email protected]> 写道： > > > >Hi, A surprising problem occurs when I try to play Video, I can only > >hear the sound part of the video. My code snippet is below: > > > >public class VideoDemo extends Activity { > > > > public static final int MENU_PLAYER=Menu.FIRST; > > public static final int MENU_VIDEO=MENU_PLAYER+1; > > private final static String VIDEOURL="/sdcard/10-58-26.3gp"; > > /** Called when the activity is first created. */ > > @Override > > public void onCreate(Bundle savedInstanceState) { > > super.onCreate(savedInstanceState); > > setContentView(R.layout.main); > > // playVideoByVideoView(VIDEOURL); > > } > > private void playVideoByVideoView(String fileURL){ > >// this.getWindow().setFormat(PixelFormat.TRANSLUCENT); > > setContentView(R.layout.videoview); > > VideoView videoView=(VideoView)findViewById(R.id.surface_view); > > > >// videoView.setVisibility(SurfaceView.VISIBLE); > > videoView.bringToFront(); > > videoView.setVideoPath(fileURL); > > videoView.setMediaController(new MediaController(this)); > > videoView.requestFocus(); > >// videoView.start(); > > } > > private void playVideoByMediaPlayer(String fileURL){ > > MediaPlayer mp = new MediaPlayer(); > > SurfaceView sv =new SurfaceView(this); > > try { > > mp.setDataSource(fileURL); > > mp.setDisplay(sv.getHolder()); > > mp.prepare(); > > mp.start(); > > } catch (IllegalArgumentException e) { > > // TODO Auto-generated catch block > > e.printStackTrace(); > > mp.release(); > > > > } catch (IllegalStateException e) { > > // TODO Auto-generated catch block > > e.printStackTrace(); > > mp.release(); > > } catch (IOException e) { > > // TODO Auto-generated catch block > > e.printStackTrace(); > > mp.release(); > > } > > } > > @Override > > public boolean onCreateOptionsMenu(Menu menu) { > > // TODO Auto-generated method stub > > boolean ret= super.onCreateOptionsMenu(menu); > > menu.add(0, MENU_PLAYER, 0, "MediaPlayer"); > > menu.add(0, MENU_VIDEO, 0, "VideoView"); > > return ret; > > } > > @Override > > public boolean onMenuItemSelected(int featureId, MenuItem item) { > > // TODO Auto-generated method stub > > boolean ret= super.onMenuItemSelected(featureId, item); > > switch(item.getItemId()){ > > case MENU_PLAYER: > > playVideoByMediaPlayer(VIDEOURL); > > > > break; > > case MENU_VIDEO: > > playVideoByVideoView(VIDEOURL); > > break; > > } > > return ret; > > } > >} > > > > > > > >But when I invoke playVideoByVideoView() method in onCreate() ,I can > >see the video part. Can anybody tell me why this problem happen? How > >can I solve this problem. Thanks Very Much! > > > >> > > > > ------------------------------ > 网易邮箱，中国第一大电子邮件服务商 <http://www.yeah.net>> > --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Android Developers" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/android-developers?hl=en -~----------~----~----~----~------~----~------~--~---
