Android开发自个儿的锁屏壁纸

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

       <service android:name=".LockService" >             <intent-filter>                <category android:name="android.intent.category.default" />            </intent-filter>        </service>

        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;                }                           }         }    };

4.点亮屏幕，禁用锁屏

            KeyguardManager mKeyguardManager = (KeyguardManager)getSystemService(Context.KEYGUARD_SERVICE);            KeyguardLock mKeyguardLock = mKeyguardManager.newKeyguardLock("");            mKeyguardLock.disableKeyguard();//解锁屏幕，也就是 关闭 屏幕 锁定 功能                        PowerManager pm = (PowerManager)getSystemService(POWER_SERVICE);            PowerManager.WakeLock mWakeLock = pm.newWakeLock(                PowerManager.ACQUIRE_CAUSES_WAKEUP |                PowerManager.SCREEN_DIM_WAKE_LOCK |                PowerManager.ON_AFTER_RELEASE, "SimpleTimer");            mWakeLock.acquire();            //释放屏幕常亮锁            if(null != mWakeLock) {              //可以灭屏了             //   mWakeLock.release();            }

5.WallPaperSurfaceView MediaPlayer  SurfaceHolder 播放视频

public class WallPaperSurfaceView extends SurfaceView implements Callback {		private SurfaceHolder mSurfaceHolder;	public MediaPlayer mediaPlayer;	String tag = "BackgroundSurfaceView";	private HelloActivity helloActivity;	@Override    protected void onWindowVisibilityChanged(int visibility) {        // TODO Auto-generated method stub        super.onWindowVisibilityChanged(visibility);    }    @Override    public boolean onTouchEvent(MotionEvent event) {        helloActivity.finish();        HelloActivity.isScreenOff = false;        return super.onTouchEvent(event);    }    public WallPaperSurfaceView(Context context, AttributeSet attrs) {		super(context, attrs);				helloActivity = (HelloActivity) context;		mSurfaceHolder = getHolder();		//设置SurfaceView自己不管理的缓冲区		mSurfaceHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);		mSurfaceHolder.addCallback(this);	}	@Override	public void surfaceChanged(SurfaceHolder holder, int format, int width,			int height) {	}	@Override	public void surfaceCreated(SurfaceHolder holder) {	    Log.d("yzy","surfaceCreated.....");	    mediaPlayer=new MediaPlayer();		play();			}	@Override	public void surfaceDestroyed(SurfaceHolder holder) {		holder.removeCallback(this);		if(mediaPlayer!=null ) {			mediaPlayer.release();			mediaPlayer = null;		}	}			private void play() {		try {		    if(mediaPlayer ==  null) {		        mediaPlayer = new MediaPlayer();		    }		    			mediaPlayer.reset();			mediaPlayer			.setAudioStreamType(AudioManager.STREAM_MUSIC);			mediaPlayer.setScreenOnWhilePlaying(true);			//设置需要播放的视频		    mediaPlayer.setDataSource("/mnt/sdcard/sun.mp4");						mediaPlayer.setDisplay(mSurfaceHolder);			mediaPlayer.prepare();			mediaPlayer.setLooping(true);			//播放			mediaPlayer.start();		} catch (Exception e) {			Log.e(tag, "kc" , e);		}	}}