##利用廣播監聽手機解鎖、鎖屏和亮屏的操作

public class MainActivity extends Activity {
    BroadcastReceiver receiver;
    private static String TAG = "MyLog";
    private ScreenListener MyListener;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        TestBroadReceiver();
        IntentFilter filter = new
 
 IntentFilter();//定義一個意圖攔截
        filter.addAction(Intent.ACTION_SCREEN_ON);//新增要攔截的動作
        filter.addAction(Intent.ACTION_SCREEN_OFF);
        filter.addAction(Intent.ACTION_USER_PRESENT);
        registerReceiver(receiver, filter);//註冊廣播
    }

    public void TestBroadReceiver() {
        receiver = new
 
 BroadcastReceiver() {

            @Override
            public void onReceive(Context context, Intent intent) {
                String action = intent.getAction();
                // TODO Auto-generated method stub
                if (Intent.ACTION_SCREEN_ON.equals(action)) { // 開屏 
                    //攔截事件後可在此操作            
 

                    Log.i(TAG, "開屏");
                } else if (Intent.ACTION_SCREEN_OFF.equals(action)) { // 鎖屏 
                    //攔截事件後可在此操作                    
                    Log.i(TAG, "鎖屏");
                } else if (Intent.ACTION_USER_PRESENT.equals(action)) { // 解鎖
                    //攔截事件後可在此操作    
                    Log.i(TAG, "解鎖");
                }
            }
        };

    }
    @Override
    protected void onDestroy() {
        super.onDestroy();
        unregisterReceiver(receiver);//銷燬頁面時登出廣播
    }
}