SurfaceView  SurfaceHolder  MediaPlayer    Service      BroadcastReceiver    KeyguardManager    PowerManager

思路：启动一个服务，监听灭屏广播，当收到广播的时候，点亮屏幕，禁用锁屏，调用使用SurfaceView播放视频。

1.启动一个服务

Intent intent = new Intent();

intent.setClass(this,LockService.class);

startService(intent);

2.LockService onCreate中注册监听ACTION_SCREEN_OFF

final IntentFilter filter = new IntentFilter();

filter.addAction(Intent.ACTION_SCREEN_OFF);

registerReceiver(mReceiver, filter);

3.LockService 的内部监听类

private final BroadcastReceiver mReceiver = new BroadcastReceiver() {

@Override

public void onReceive(Context context, Intent intent) {

final String action = intent.getAction();

if (Intent.ACTION_SCREEN_OFF.equals(action)) {

Log.d("yzy","screen_off...");

if(HelloActivity.isScreenOff == false){

wakeUpScreen();

Intent intent1  = new Intent();

intent1.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);

intent1.setClass(LockService.this, HelloActivity.class);//启动屏保界面

startActivity(intent1);

HelloActivity.isScreenOff = true;

}

}

}

    };