我试图注册一个广播接收器, 这样当屏幕打开时, 飞机模式也打开了。 只要我留在我注册的活动中, 它就起作用了, 但是一旦我离开活动, 它就停止工作。 Android 宣言是静态的, 所以我不能使用它。 此外, Android 宣言方法不允许你使用 SCREEN ON, 因为当屏幕醒来时, Android不希望你运行一堆事情, 所以它必须使用 Receiver AFAIK 注册系统来完成。

我的活动:

public class WakeActivity extends Activity {

IntentFilter screenon = new IntentFilter("android.intent.action.SCREEN_ON");

//Skipped a bunch of code here to keep it relevant. Remember, the broadcast receiver
//does in fact work while I m in the activity, so the problem isn t with
//the missing code here. Still, let me know if I m missing something.

//The following method is called within onCreate()

protected void airplane(int i) {
    Screen_On screenon_airplane = new Screen_On();
    if (i == 0) {
        screenon_airplane.airplanei = 0;
        registerReceiver(screenon_airplane, screenon);
    } else if (i == 1) {
        screenon_airplane.airplanei = 1;
        registerReceiver(screenon_airplane, screenon);
    } else if (i == -1) {
        unregisterReceiver(screenon_airplane);
    }
}
}

我的广播接收器:

public class Screen_On extends BroadcastReceiver {

public int airplanei;

@Override
public void onReceive(final Context context, Intent intent) {
    boolean isEnabled = Settings.System.getInt(
            context.getContentResolver(), Settings.System.AIRPLANE_MODE_ON,
            0) == 1;
    if (airplanei == 0) {
        if (isEnabled != false) {
            Settings.System.putInt(context.getContentResolver(),
                    Settings.System.AIRPLANE_MODE_ON, 0);
            Intent turnplaneoff = new Intent(
                    Intent.ACTION_AIRPLANE_MODE_CHANGED);
            turnplaneoff.putExtra("state", 0);
            context.sendBroadcast(turnplaneoff);
        }
    } else if (airplanei == 1) {
        if (isEnabled == false) {
            Settings.System.putInt(context.getContentResolver(),
                    Settings.System.AIRPLANE_MODE_ON, 1);
            Intent turnplaneon = new Intent(
                    Intent.ACTION_AIRPLANE_MODE_CHANGED);
            turnplaneon.putExtra("state", 1);
            context.sendBroadcast(turnplaneon);
        }
    }
}
}

logCat 错误:-

05-17 23:44:24.886: E/ActivityThread(2435): Activity com.dragonheart.autodroid.ActionActivities.WakeActivity has leaked IntentReceiver com.dragonheart.autodroid.BroadCastRecievers.Screen_On@414271b0 that was originally registered here. Are you missing a call to unregisterReceiver()?

错误是否与不告诉广播接收器在Pause () 或Destroy () 上写些什么有关?... 虽然我以为它注册后会一直工作到未登记为止,