上节课我们讲了安卓MP3播放，现在我们学习视频播放，遗憾的是目前MediaPlayer只能播放3gp的视频格式，其他需要相应解码器。
视频中的渲染需要一个我们还没有学习过的组件SurfaceView，以及android.view.SurfaceHolder;对其实时渲染
先看主配置文件.xml
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/LinearLayout1"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
tools:context=".MediaDemo" >
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content" >
<ImageButton
android:id="@+id/start"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:onClick="start"
android:src="@drawable/start" />
<ImageButton
android:id="@+id/stop"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:onClick="stop"
android:src="@drawable/stop" />
</LinearLayout>
<SurfaceView
android:id="@+id/surfaceView"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
</LinearLayout>
主Activity代码：
public class MediaDemo extends Activity {
MediaPlayer mediaplayer;
SurfaceView surfaceview;
SurfaceHolder surfaceviewholder;
Context context;
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_media_demo);
surfaceview=(SurfaceView)super.findViewById(R.id.surfaceView);
this.context=MediaDemo.this;
this.surfaceviewholder=surfaceview.getHolder();
this.surfaceviewholder.setType(surfaceviewholder.SURFACE_TYPE_PUSH_BUFFERS);
this.mediaplayer=new MediaPlayer();
try {
this.mediaplayer.setDataSource("/sdcard/ee.3gp");
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
public void start(View v){
this.mediaplayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
this.mediaplayer.setDisplay(surfaceviewholder);
try {
this.mediaplayer.prepare();
this.mediaplayer.start();
} catch (IllegalStateException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
public void stop(View v){
this.mediaplayer.stop();
}
}
实现效果如下：
