Android SDK:媒体播放器 - 从HTTP网址加载视频流

时间:2012-07-10 09:58:36

标签: android android-mediaplayer android-video-player

我有一个MediaPlayerActivity,代码如下: 此代码基本上尝试从http url获取视频流并加载它但由于某种原因它会一直崩溃。

public class MediaPlayerActivity extends Activity {

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        this.setContentView(R.layout.video_player);
        SurfaceView v = (SurfaceView) findViewById(R.id.surface_video); 
        SurfaceHolder holder = v.getHolder(); 
        holder.setFixedSize(400,300); 

        MediaPlayer mp = MediaPlayer.create(this, Uri.parse("http://stream-url.com/playlist.m3u8")); 
        mp.setDisplay(holder);
        //mp.setAudioStreamType(2); 
        try {
            //mp.prepare();
            mp.start();
        } catch (IllegalStateException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }


    }

}

video_player.xml:

<?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" 
> 
<SurfaceView android:id="@+id/surface_video" 
android:layout_width="250px" 
android:layout_height="250px"> 
</SurfaceView> 
<LinearLayout 
android:orientation="horizontal" 
android:layout_height="wrap_content" 
android:layout_width="fill_parent" 
android:padding="10dip" 
> 
</LinearLayout> 
</LinearLayout> 

当我使用以下代码进行此活动时,它会崩溃:

Intent myIntent = new Intent(HomeActivity.this, MediaPlayerActivity.class);
                    HomeActivity.this.startActivity(myIntent);

我做错了什么?

1 个答案:

答案 0 :(得分:4)

没有日志,有两条建议:

  1. 尝试实施SurfaceHolder.Callback.surfaceCreated()
  2. 尝试使用接受MediaPlayer.create()
  3. SurfaceHolder

    (1)

    的详情

    拨打start()时,可能还没有创建表面。您应该使用MediaPlayer.setDisplay()MediaPlayer.start() only after surface is created. To do this, you should add override SurfaceHolder.Callback.surfaceCreated()`。例如,您的代码可能如下所示。

    public class MediaPlayerActivity extends Activity implements SurfaceHolder.Callback {
        MediaPlayer mp; 
    
        @Override
        public void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
    
            this.setContentView(R.layout.video_player);
            SurfaceView v = (SurfaceView) findViewById(R.id.surface_video); 
            SurfaceHolder holder = v.getHolder(); 
            holder.setFixedSize(400,300);
            holder.addCallback(this). 
    
            mp = MediaPlayer.create(this, Uri.parse("http://stream-url.com/playlist.m3u8")); 
    
        @Override
        public void surfaceCreated(SurfaceHolder holder) {
    
            mp.setDisplay(holder); 
            try {
                mp.start();
            } catch (IllegalStateException e) {
                e.printStackTrace();
            }
        }
    }
    

    (2)

    的详情

    似乎有其他MediaPlayer.create()接受SurfaceHolder作为其中一个参数 - 您可以尝试:http://developer.android.com/reference/android/media/MediaPlayer.html#create(android.content.Context, android.net.Uri, android.view.SurfaceHolder)