int main(int argc, char *argv[]) {
    QAndroidService app(argc, argv);
    new QCMainFormService();
    return app.exec();
}

The app and the service works perfectly (they are in a different process).
If I minimize the app, after a while, the service will be killed.
This is the logcat output

07-28 17:00:15.546  5502  5520 F libc    : Fatal signal 11 (SIGSEGV), code 1, fault addr 0x25 in tid 5520 (QtThread), pid 5502 (lock:qt_service)
07-28 17:00:15.569   389  3546 I ActivityManager: Process it.denisgottardello.LocalClock:qt_service (pid 5502) has died: fore SVC 
07-28 17:00:15.566   389   389 I ActivityManager: type=1400 audit(0.0:205): avc: denied { getpgid } for scontext=u:r:system_server:s0 tcontext=u:r:crash_dump:s0:c512,c768 tclass=process permissive=1
07-28 17:00:15.571   389   406 W system_server: kill(-5502, 9) failed: No such process

How can I do in order to have my service working no stop?