Unfortunately setting mSF to null had no influence. Some additional
info on what's happening:
If I leave <SurfaceView> in my main.xml, the surface won't show the
video, but will contain the info what was displayed on it in the
subactivity. If I use <VideoView> in main.xml, the subactivity info is
erased, but the surface remains black.
There are some rare occasions when a video is playing, but when I
return to the subactivty, and select the same file again, it no longer
plays in the main activity.
I also tried with VideoView (in main.xml and Java code), with this:
VideoView mVideoView = (VideoView)findViewById(R.id.preview);
mVideoView.setVideoURI(Uri.parse("file://" + data));
mVideoView.setMediaController(new MediaController(this));
mVideoView.requestFocus();
But, I experience the same thing, and additionally sometimes the app
crashes.
Any other ideas to try out?
Thanks,
Robert
On Apr 12, 4:41 am, "Megha Joshi" <[EMAIL PROTECTED]> wrote:
> Hi Robert,
>
> What if you set mSF to null in surfaceDestroyed() call... Does that help?
>
> Thanks,
> Megha
>
> On Fri, Apr 11, 2008 at 2:27 PM, Robert <[EMAIL PROTECTED]> wrote:
>
> > Hi Megha,
>
> > I am successfully using your classes to capture and view video files.
> > But, can't seem to reliable reuse the same surface when returning from
> > a subactivity. I tried playing a video file in onActivityResult(), and
> > although managed to play it on rare occasions, most of the time the
> > video is not shown. Since I've been running the same code over and
> > over again (and only sometimes successfully), I am assuming that the
> > surface is not ready to receive the video sequence. How can I make
> > sure surfaceCreated() has already done its job? Should I add something
> > to onResume() or onRestart() in my main activity?
>
> > The relevant code:
>
> > public class mediaclass extends Activity implements
> > SurfaceHolder.Callback {
> > private SurfaceView mSF;
> > private SurfaceHolder mHolder = null;
> > private boolean mHasSurface;
> > private MediaPlayer myPlayer;
>
> > @Override public void onCreate(Bundle icicle) {
> > super.onCreate(icicle);
> > setContentView(R.layout.main);
> > mSF = (SurfaceView) findViewById(R.id.preview);
> > mSF.getHolder().addCallback(this);
> > mHasSurface = false;
> > }
>
> > public void surfaceCreated(SurfaceHolder holder) {
> > mHolder = holder;
> > mHasSurface = true;
> > }
>
> > public void surfaceDestroyed(SurfaceHolder holder) {
> > mHolder = null;
> > mHasSurface = false;
> > }
>
> > @Override protected void onActivityResult(int requestCode, int
> > resultCode, String data, Bundle extras) {
> > super.onActivityResult(requestCode, resultCode, data, extras);
>
> > myPlayer = new MediaPlayer();
> > if (mHasSurface == true){
> > myPlayer.setDisplay(mHolder.getSurface());
> > }
> > try {
> > myPlayer.setDataSource(data); // data contains the full
> > path/
> > filename (from SD card)
> > myPlayer.prepare();
> > } catch (IOException e) {
> > Log.e(TAG, e.getMessage(), e);
> > }
> > myPlayer.start();
> > }
>
> > As you can see, I am checking mHasSurface, before attaching to the
> > surface. I even tried waiting for mHasSurface to become true in an
> > "infinite" loop, but no luck with that either :( What else can I try?
>
> > This is how the surface is defined in main.xml:
> > <SurfaceView
> > android:id="@+id/preview"
> > android:layout_width="176dip"
> > android:layout_height="144dip"
> > android:layout_alignParentTop="true"
> > android:layout_marginLeft="4px"
> > />
>
> > Also can you suggest a way to display a PNG image from SD card on a
> > SurfaceView? Seems that MediaPlayer was not designed for this.
>
> > Thanks and regards
> > Robert
>
> > On Apr 8, 1:19 am, "Megha Joshi" <[EMAIL PROTECTED]> wrote:
> > > Hi,
>
> > > This is because the surface is not yet ready for the mediaplayer, please
> > > call the mediaPlayer initialization code in or after OnSurfaceCreate()
> > > callback..
>
> > > Thanks,
> > > Megha
>
> > > On Mon, Apr 7, 2008 at 9:45 AM, fubin <[EMAIL PROTECTED]> wrote:
>
> > > > In Sample given by google There is a button to invoke a file.
> > > > private void playVideo(Integer Media) {
> > > > try {
> > > > // If the path has not changed, just start the media
> > > > player
> > > > path = "/data/room.mp4";
>
> > > > // Create a new media player and set the listeners
> > > > mp = new MediaPlayer();
> > > > mp.setDataSource(path);
> > > > mp.setDisplay(holder.getSurface());
> > > > mp.prepare();
> > > > mp.setOnBufferingUpdateListener(this);
> > > > mp.setOnCompletionListener(this);
> > > > mp.setOnPreparedListener(this);
> > > > mp.setAudioStreamType(AudioSystem.STREAM_MUSIC);
> > > > Log.d("\n\nCREATE", "mediaplayer");
> > > > mp.start();
> > > > } catch (Exception e) {
> > > > Log.e(TAG, "error: " + e.getMessage(), e);
> > > > }
> > > > }
>
> > > > private OnClickListener mPlayListener = new OnClickListener() {
> > > > public void onClick(View v) {
> > > > playVideo(extras.getInt(MEDIA));
>
> > > > }
> > > > };
>
> > > > When I copy the code directly to onCreate like the following program
> > > > creshed...:
>
> > > > public void onCreate(Bundle icicle) {
> > > > super.onCreate(icicle);
> > > > setContentView(R.layout.mediaplayer);
> > > > mPreview = (SurfaceView) findViewById(R.id.surface);
>
> > > > // Set the transparency
> > > > getWindow().setFormat(PixelFormat.TRANSPARENT);
> > > > // Set a size for the video screen
> > > > holder = mPreview.getHolder();
> > > > holder.addCallback(this);
> > > > try {
> > > > // If the path has not changed, just start the media
> > > > player
> > > > path = "/data/room.mp4";
>
> > > > // Create a new media player and set the listeners
> > > > mp = new MediaPlayer();
> > > > mp.setDataSource(path);
> > > > mp.setDisplay(holder.getSurface());
> > > > mp.prepare();
> > > > mp.setOnBufferingUpdateListener(this);
>
> > > > mp.setOnCompletionListener(this);
> > > > mp.setOnPreparedListener(this);
> > > > mp.setAudioStreamType(AudioSystem.STREAM_MUSIC);
> > > > Log.d("\n\nCREATE", "mediaplayer");
> > > > mp.start();
> > > > } catch (Exception e) {
> > > > Log.e(TAG, "error: " + e.getMessage(), e);
> > > > }
> > > > }
>
> > > > There is no error information for debug.
> > > > Anyone have the same problem?
> > > > Thanks in advance.
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