How to prevent an application that runs in the background from being stopped by the user?

Question

For example an application that needs the strings of the apparatus every 30 seconds and that runs in the background and, the user can not force its stop manually.

Answer 1

From what I understand you want to develop a service "zombie" that will work independent of the application. I do not advise, you have to think about battery life, even more using GPS. If it is not an internal use application of a company, you have a chance to have a high level of user rejection.

But...

For that you’ll need a Broadcastreceiver:

In the manifest:

<receiver
            android:name=".services.ReceiverCall"
            android:enabled="true"
            android:exported="false" >

            <intent-filter>
                <action android:name="SEU PACOTE.service.broadcast" />
                <action android:name="android.intent.action.BOOT_COMPLETED" />
            </intent-filter>

        </receiver>

The broadcast:

public class Receivercall extends Broadcastreceiver { public receivercall() { }

    @Override
    public void onReceive(Context context, Intent intent) {
            context.startService(new Intent(context, SEU_SERVICE.class));
    }
}

Answer 2

The way would be to create a kind of "service run period" with an Alarmmanager and Schedule. There is no way to prevent the user from stopping a service, as there are several ways to stop a service. You better work on how to re-run your service.

With the onStartCommand(), the service returns an integer that sets the reset behavior, in case the service is terminated by the Android platform.

With these constants you can "control" your service processes and return your standards:

• Service.START_STICKY
• Service.START_NOT_STICKY
• Service.START_REDELIVER_INTENT

READ MORE HERE

Answer 3

I actually solved my problem using Services, putting my application to have administrator access level and starting a new service when the user deletes the application in the service onDestroy method.