23
Tôi đang phát triển một ứng dụng video. Sau khi phát lại video đầu tiên được thực hiện, trong "OnCopletion" tôi đang cố gắng để bắt đầu một cái mới. Nhưng nó chỉ dừng lại (không bị treo) và không làm gì cả. Trong nhật ký:java.lang.IllegalStateException có nghĩa là gì?
10-19 09:44:49.056: ERROR/MediaPlayer(4654): setDataSource called in state 128
10-19 09:44:49.056: WARN/System.err(4654): java.lang.IllegalStateException
10-19 09:44:49.056: WARN/System.err(4654): at android.media.MediaPlayer.setDataSource(Native Method)
10-19 09:44:49.056: WARN/System.err(4654): at ru.osiris.BusAdvertising.BusAdvertisingActivity.onCompletion(BusAdvertisingActivity.java:1255)
10-19 09:44:49.056: WARN/System.err(4654): at android.media.MediaPlayer$EventHandler.handleMessage(MediaPlayer.java:1304)
10-19 09:44:49.056: WARN/System.err(4654): at android.os.Handler.dispatchMessage(Handler.java:99)
10-19 09:44:49.056: WARN/System.err(4654): at android.os.Looper.loop(Looper.java:123)
10-19 09:44:49.056: WARN/System.err(4654): at android.app.ActivityThread.main(ActivityThread.java:4627)
10-19 09:44:49.056: WARN/System.err(4654): at java.lang.reflect.Method.invokeNative(Native Method)
10-19 09:44:49.056: WARN/System.err(4654): at java.lang.reflect.Method.invoke(Method.java:521)
10-19 09:44:49.056: WARN/System.err(4654): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
10-19 09:44:49.056: WARN/System.err(4654): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
10-19 09:44:49.056: WARN/System.err(4654): at dalvik.system.NativeStart.main(Native Method)
có nghĩa là gì? Làm thế nào tôi có thể sửa chữa nó? có mã của tôi:
public class BusAdvertisingActivity extends Activity implements LocationListener, OnBufferingUpdateListener, OnCompletionListener,
OnPreparedListener, OnVideoSizeChangedListener, SurfaceHolder.Callback {
...
private MediaPlayer mMediaPlayer;
private SurfaceView mPreview;
private SurfaceHolder holder;
private String path;
private Bundle extras;
@Override
public void onCreate(Bundle icicle) {
mPreview = (SurfaceView) findViewById(R.id.surface);
holder = mPreview.getHolder();
holder.addCallback(this);
holder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
extras = getIntent().getExtras();
}
public void surfaceCreated(SurfaceHolder holder) {
Log.d(TAG, "surfaceCreated called");
playVideo();
}
private void playVideo(Integer Media) {
Log.d(TAG, "playVideo called");
doCleanUp();
try {
File clip=new File(Environment.getExternalStorageDirectory(),
playList[FLcurrentVideo].substring(2, playList[FLcurrentVideo].length()-1)+".mp4");
path = clip.getAbsolutePath();
mMediaPlayer = new MediaPlayer();
mMediaPlayer.setDataSource(path);
mMediaPlayer.setDisplay(holder);
mMediaPlayer.prepare();
mMediaPlayer.setOnBufferingUpdateListener(this);
mMediaPlayer.setOnCompletionListener(this);
mMediaPlayer.setOnPreparedListener(this);
mMediaPlayer.setOnVideoSizeChangedListener(this);
mMediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
} catch (Exception e) {
Log.e(TAG, "error: " + e.getMessage(), e);
}
}
public void onCompletion(MediaPlayer arg0) {
Log.d(TAG, "onCompletion called");
FLcurrentVideo++;
File clip=new File(Environment.getExternalStorageDirectory(),
playList[FLcurrentVideo].substring(2, playList[FLcurrentVideo].length()-1)+".mp4");
path = clip.getAbsolutePath();
try {
Log.d ("111", path);
arg0.setDataSource(clip.getAbsolutePath()); //I got exception here
arg0.setDisplay(holder);
arg0.prepare();
arg0.setOnBufferingUpdateListener(this);
arg0.setOnCompletionListener(this);
arg0.setOnPreparedListener(this);
arg0.setOnVideoSizeChangedListener(this);
arg0.setAudioStreamType(AudioManager.STREAM_MUSIC);
} catch (IllegalArgumentException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IllegalStateException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
Vui lòng trợ giúp tôi.
