Proper process

I need my Android-App to retrieve the configuration from the server once per hour via http-get.

I'm new to Android, I've been fighting for days ... Finally I made it using AlarmManager. With setInexactRepeating (alarm type RTC_WAKEUP) triggers AlarmReceiverTEST (BroadcastReceiver) and it calls MyTestService (IntentService) that makes the GET call through an AsyncTask.

Before I made several attempts. In both the App stopped working after several alarms:

• Call the AsyncTask from the BroadcastReceiver (without using a Service).
• The alarm triggers a Service directly (through PendingIntent.getService) that the AsyncTask calls.

This is the final code. Please, tell me if I'm doing well ...

1. AndroidManifest.xml I define the receiver and the service:

<receiver android:name="AlarmReceiverTEST" android:enabled="true" />
<service android:name=".MyTestService" android:exported="false" />

2. AlarmReceiverTEST.java Process that triggers the alarm. This starts the MyTestService service:

public class AlarmReceiverTEST extends BroadcastReceiver {
    @Override
    public void onReceive(Context context, Intent intent) {
        Intent service1 = new Intent(context, MyTestService.class);
        context.startService(service1);
    }
}

3. MyTestService.java Make the GET call using an AsyncTask:

public class MyTestService extends IntentService {
public MyTestService() {
    super("MyTestService");
}

@Override
protected void onHandleIntent(@Nullable Intent intent) {
    new CallAPI_GET().execute();
}

public final String USER_AGENT = "Mozilla/5.0";
public final String GET_URL = "http://www.miservidor.org/api/getConf.php";
public class CallAPI_GET extends AsyncTask<String, String, String> {

    @Override
    protected String doInBackground(String... strings) {
        String sMessage = "";

        try {
            String sUrl = GET_URL + "?cfgIni=0&idInstala=" + MyApp.iIdInstala;

            URL obj = new URL(sUrl);
            HttpURLConnection con = (HttpURLConnection) obj.openConnection();
            con.setRequestMethod("GET");
            con.setRequestProperty("User-Agent", USER_AGENT);

            int responseCode = con.getResponseCode();           // 200?
            if (responseCode == HttpURLConnection.HTTP_OK) { // success
                // Recuperar missatge del servidor
                BufferedReader in = new BufferedReader(new InputStreamReader(
                        con.getInputStream()));
                String inputLine;
                StringBuffer response = new StringBuffer();
                while ((inputLine = in.readLine()) != null) {
                    response.append(inputLine);
                }
                in.close();
                sMessage = response.toString();
            }

        } catch (ProtocolException e) {
            e.printStackTrace();
        } catch (MalformedURLException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }

        return sMessage;
    }

    @Override
    protected void onPostExecute(String sResult) {
        super.onPostExecute(sResult);

        // Procesar resultado ...
    }
}

4. MainActivity.java Main program; I set an alarm with setInexactRepeating, which triggers AlarmReceiverTEST every hour:

// Construct an intent that will execute the AlarmReceiver
Intent intent = new Intent(getApplicationContext(), AlarmReceiverTEST.class);
// Create a PendingIntent to be triggered when the alarm goes off
final PendingIntent pIntent = PendingIntent.getBroadcast(getApplicationContext(),1,
        intent, PendingIntent.FLAG_UPDATE_CURRENT);
// Setup periodic alarm every every half hour from this point onwards
long firstMillis = System.currentTimeMillis(); // alarm is set right away
AlarmManager alarm = (AlarmManager) getSystemService(Context.ALARM_SERVICE);
// First parameter is the type: ELAPSED_REALTIME, ELAPSED_REALTIME_WAKEUP, RTC_WAKEUP
// Interval can be INTERVAL_FIFTEEN_MINUTES, INTERVAL_HALF_HOUR, INTERVAL_HOUR, INTERVAL_DAY
alarm.setInexactRepeating(AlarmManager.RTC_WAKEUP, firstMillis,
        AlarmManager.INTERVAL_HOUR, pIntent);

Thanks in advance! :)