SurfaceView
- 使用双缓冲技术
- 是个重量级的组件
- 只要不可见，就不会创建，可见时，才会创建
- 只要不可见，就会销毁
SurfaceView一旦不可见，就会被销毁，一旦可见，就会被创建，销毁时停止播放，再次创建时再开始播放
1 import android.app.Activity; 2 import android.media.MediaPlayer; 3 import android.os.Bundle; 4 import android.view.SurfaceHolder; 5 import android.view.SurfaceHolder.Callback; 6 import android.view.SurfaceView; 7 8 public class MainActivity extends Activity { 9 private MediaPlayer player;10 static int currentPosition;11 12 @Override13 protected void onCreate(Bundle savedInstanceState) {14 super.onCreate(savedInstanceState);15 setContentView(R.layout.activity_main);16 17 SurfaceView sv = (SurfaceView) findViewById(R.id.sv);18 // 拿到surfaceview的控制器19 final SurfaceHolder sh = sv.getHolder();20 //给SurfaceHolder设置CallBack，类似于侦听，可以知道SurfaceView的状态21 sh.addCallback(new Callback() {22 // surfaceView销毁时调用23 @Override24 public void surfaceDestroyed(SurfaceHolder holder) {25 // 每次surfaceview销毁时，同时停止播放视频26 if (player != null) {27 currentPosition = player.getCurrentPosition();28 player.stop();29 player.release();30 player = null;31 }32 }33 34 // surfaceView创建时调用35 @Override36 public void surfaceCreated(SurfaceHolder holder) {37 // 每次surfaceView创建时才去播放视频38 if (player == null) {39 player = new MediaPlayer();40 player.reset();41 try {42 player.setDataSource("sdcard/2.3gp");43 player.setDisplay(sh);44 player.prepare();45 player.start();46 player.seekTo(currentPosition);47 } catch (Exception e) {48 e.printStackTrace();49 }50 }51 52 }53 54 // surfaceView结构改变时调用55 @Override56 public void surfaceChanged(SurfaceHolder holder, int format,57 int width, int height) {58 }59 });60 }61 }