運行將接收SCREEN_ON服務廣播

Question

我建立應接收Android的android.intent.action.SCREEN_ON廣播的和做的背景是什麼應用程序。

（即廣播保護，不能被添加到清單中的IntentFilter部分，則需要可通過編程registerReceiver()註冊）

我知道如何啓動服務。我知道如何讓獨立啓動它的活動的（因此它不會與它死了）。真正的問題是：

如何在服務中註冊SCREEN_ON廣播接收器，即使服務由於系統發送廣播而導致RAM數量低而被設備暫時中止，它也會被服務接收到？

Answer 1

public class OnBootService extends Service { 

    private static final String TAG = OnBootService.class.getSimpleName(); 
    private PowerButtonReceiver mPowerButtonReceiver = null; 

    @Override 
    public IBinder onBind(Intent intent) { 
     return null; 
    } 

    @Override 
    public int onStartCommand(final Intent intent, final int flags, final int startId) { 

    if (mPowerButtonReceiver==null) { 
     mPowerButtonReceiver = new PowerButtonReceiver(); 
     registerReceiver(mPowerButtonReceiver, new IntentFilter(Intent.ACTION_SCREEN_ON)); 
    } 
    return Service.START_NOT_STICKY; 
} 

@Override 
public void onCreate() { 
    super.onCreate(); 

    Log.i(TAG,"onCreate()"); 
} 

    // unregister the Receiver when the Service gets stopped (destroyed) 
@Override 
public void onDestroy() { 
    super.onDestroy(); 

    unregisterReceiver(mPowerButtonReceiver); 

    Log.i(TAG, ""+TAG+" stopped: "+ new Date().toString()); 
    } 
} 

編輯：我添加了powerButtonReceiver太：

public class PowerButtonReceiver extends BroadcastReceiver { 

    private static final String TAG = "PowerButtonReceiver"; 

    private int mPowerClickCounter = 0; 
    private boolean inTime = true; 

    @Override 
    public void onReceive(Context context, Intent intent) { 
     SharedPreferences sharedPref = context.getSharedPreferences("MyPrefs", Context.MODE_PRIVATE); 

     Boolean bCheck = sharedPref.getBoolean("PowerButtonReceiverState", false); 

     // check if screen is on 
     PowerManager pm = (PowerManager) context.getSystemService(Context.POWER_SERVICE); 
     Boolean screenOn = pm.isScreenOn(); 
     Log.i(TAG, "Screen is on: " + screenOn.toString()); 
}}