Android之SurfaceView实现视频播放

最新推荐文章于 2022-05-26 17:24:27 发布

劲草疾风

最新推荐文章于 2022-05-26 17:24:27 发布

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分类专栏： Android 文章标签： android layout button exception encoding class

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布局文件：

<?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" android:weightSum="1">
    <SurfaceView android:layout_height="220dip" android:layout_gravity="center" android:id="@+id/surface" android:layout_weight="0.25" android:layout_width="320dip"></SurfaceView>
    <LinearLayout android:id="@+id/linearLayout1" android:layout_height="wrap_content" android:layout_width="fill_parent">
        <Button android:text="播放" android:id="@+id/button1" android:layout_width="wrap_content" android:layout_height="wrap_content"></Button>
        <Button android:text="暂停" android:id="@+id/button2" android:layout_width="wrap_content" android:layout_height="wrap_content"></Button>
        <Button android:text="停止" android:id="@+id/button3" android:layout_width="wrap_content" android:layout_height="wrap_content"></Button>
    </LinearLayout>
</LinearLayout>

主程序：

public class SurfaceActivity extends Activity implements SurfaceHolder.Callback {
    /** Called when the activity is first created. */
    MediaPlayer player;
    SurfaceView surface;
    SurfaceHolder surfaceHolder;
    Button play,pause,stop;
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        play=(Button)findViewById(R.id.button1);
        pause=(Button)findViewById(R.id.button2);
        stop=(Button)findViewById(R.id.button3);
        surface=(SurfaceView)findViewById(R.id.surface);
 
        surfaceHolder=surface.getHolder();　　//SurfaceHolder是SurfaceView的控制接口
        surfaceHolder.addCallback(this); 　　//因为这个类实现了SurfaceHolder.Callback接口，所以回调参数直接this
        surfaceHolder.setFixedSize(320, 220);　　//显示的分辨率,不设置为视频默认
        surfaceHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);　　//Surface类型
 
        play.setOnClickListener(new OnClickListener(){
             @Override
            public void onClick(View v) {
                player.start();
            }});

        pause.setOnClickListener(new OnClickListener(){
            @Override
            public void onClick(View v) {
                player.pause();
            }});

        stop.setOnClickListener(new OnClickListener(){
             @Override
            public void onClick(View v) {
                player.stop();
            }});
    }
 
    @Override
    public void surfaceChanged(SurfaceHolder arg0, int arg1, int arg2, int arg3) {
    }
 
    @Override
    public void surfaceCreated(SurfaceHolder arg0) {
//必须在surface创建后才能初始化MediaPlayer,否则不会显示图像
        player=new MediaPlayer();
        player.setAudioStreamType(AudioManager.STREAM_MUSIC);
        player.setDisplay(surfaceHolder);
        //设置显示视频显示在SurfaceView上
            try {
                player.setDataSource("/sdcard/3.mp4");
                player.prepare();
            } catch (Exception e) {
                e.printStackTrace();
            }
    }
 
    @Override
    public void surfaceDestroyed(SurfaceHolder arg0) {
        // TODO Auto-generated method stub
 
    }
 
    @Override
    protected void onDestroy() {
        // TODO Auto-generated method stub
        super.onDestroy();
        if(player.isPlaying()){
        player.stop();
        }
        player.release();
        //Activity销毁时停止播放，释放资源。不做这个操作，即使退出还是能听到视频播放的声音
    }
}