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我正在使用媒体播放器来传输视频。它只播放音频而不播放视频。谁能帮忙？我的代码如下。安卓媒体播放器显示音频，但没有视频
public class VideoViewApplication extends Application {
@Override
public void onCreate() {
}
@Override
public void onTerminate() {
}
}
public class VideoViewDemo extends Activity implements
OnErrorListener,OnBufferingUpdateListener, OnCompletionListener,
MediaPlayer.OnPreparedListener, SurfaceHolder.Callback {
private static final String TAG = "VideoViewDemo";
private MediaPlayer mp;
private EditText mPath;
private SurfaceHolder holder;
private ImageButton mPlay;
private ImageButton mPause;
private ImageButton mReset;
private ImageButton mStop;
private String current;
private SurfaceView mPreview;
@Override
public void onCreate(Bundle icicle) {
super.onCreate(icicle);
setContentView(R.layout.main);
mPreview = (SurfaceView) findViewById(R.id.surface);
mPath = (EditText) findViewById(R.id.path);
mPath.setText("rtsp://video2.americafree.tv/AFTVHorrorH26496.sdp");
mPlay = (ImageButton) findViewById(R.id.play);
mPause = (ImageButton) findViewById(R.id.pause);
mReset = (ImageButton) findViewById(R.id.reset);
mStop = (ImageButton) findViewById(R.id.stop);
mPlay.setOnClickListener(new OnClickListener() {
public void onClick(View view) {
playVideo();
}
});
mPause.setOnClickListener(new OnClickListener() {
public void onClick(View view) {
if (mp != null) {
mp.pause();
}
}
});
mReset.setOnClickListener(new OnClickListener() {
public void onClick(View view) {
if (mp != null) {
mp.seekTo(0);
}
}
});
mStop.setOnClickListener(new OnClickListener() {
public void onClick(View view) {
if (mp != null) {
current = null;
mp.stop();
mp.release();
}
}
});
// getWindow().setFormat(PixelFormat.TRANSPARENT);
holder = mPreview.getHolder();
holder.addCallback(this);
holder.setFixedSize(100, 100);
runOnUiThread(new Runnable(){
public void run(){
playVideo();
}
});
}
private void playVideo() {
try {
final String path = mPath.getText().toString();
Log.v(TAG, "path: " + path);
if (path.equals(current) && mp != null) {
mp.start();
return;
}
current = path;
mp = new MediaPlayer();
mp.setOnErrorListener(this);
mp.setOnBufferingUpdateListener(this);
mp.setOnCompletionListener(this);
mp.setOnPreparedListener(this);
mp.setAudioStreamType(AudioManager.STREAM_MUSIC);
mp.setScreenOnWhilePlaying(true);
mp.setDisplay(mPreview.getHolder());
mp.setDataSource(path);
mp.prepare();
Log.v(TAG, "Duration: ===>" + mp.getDuration());
mp.start();
} catch (Exception e) {
Log.e(TAG, "error: "+ e.getMessage(), e);
if (mp != null) {
mp.stop();
mp.release();
}
}
}
public void surfaceChanged(SurfaceHolder arg0, int arg1, int arg2, int arg3) {
Log.d(TAG, "surfaceChanged called");
}
public void surfaceCreated(SurfaceHolder arg0) {
Log.d(TAG, "surfaceCreated called");
}
public void surfaceDestroyed(SurfaceHolder arg0) {
Log.d(TAG, "surfaceDestroyed called");
}
public void onPrepared(MediaPlayer arg0) {
Log.d(TAG, "onPrepared called");
}
public void onCompletion(MediaPlayer arg0) {
Log.d(TAG, "onCompletion called");
}
public void onBufferingUpdate(MediaPlayer mediaPlayer, int percent) {
Log.d(TAG, "onBufferingUpdate called ---> percent:" + percent);
}
public boolean onError(MediaPlayer mediaPlayer, int what, int extra) {
Log.e(TAG, "onError---> what:"+what+" extra:"+extra);
if (mediaPlayer != null) {
mediaPlayer.stop();
mediaPlayer.release();
}
return true;
}
}
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
>
<EditText android:id="@+id/path"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
/>
<SurfaceView
android:id="@+id/surface"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
</SurfaceView>
<LinearLayout
android:orientation="horizontal"
android:layout_height="wrap_content"
android:layout_width="fill_parent"
>
<ImageButton android:id="@+id/play"
android:layout_height="wrap_content"
android:layout_width="wrap_content"
android:src="@drawable/play"/>
<ImageButton android:id="@+id/pause"
android:layout_height="wrap_content"
android:layout_width="wrap_content"
android:src="@drawable/pause"/>
<ImageButton android:id="@+id/reset"
android:layout_height="wrap_content"
android:layout_width="wrap_content"
android:src="@drawable/reset"/>
<ImageButton android:id="@+id/stop"
android:layout_height="wrap_content"
android:layout_width="wrap_content"
android:src="@drawable/stop"/>
</LinearLayout>
</LinearLayout>
如果您试图在模拟器上运行这个，这是正常的行为。仿真器无法在大多数开发机器上渲染视频。对于测试视频应用程序，你真的需要一个设备。 – CommonsWare 2011-04-01 00:06:41
我在三星银河标签上运行它。我怀疑这与布局xml和持有者大小有关。 – Vicky 2011-04-01 00:08:18
如果设备无法完全处理视频的编码细节，有时会发生这种情况。作为测试，拍摄一小段主题视频，将其加载到设备上，然后用播放器播放。 – 2011-04-29 04:59:48