index.js

    var intent = Ti.Android.createServiceIntent({
          url: 'alarmservice.js',
                  action: Ti.Android.ACTION_MAIN,
                  flags: Ti.Android.FLAG_ACTIVITY_NEW_TASK | Ti.Android.FLAG_ACTIVITY_SINGLE_TOP | Ti.Android.FLAG_ACTIVITY_CLEAR_TOP
});

intent.addCategory(Ti.Android.CATEGORY_LAUNCHER);
intent.putExtra('interval', 1000);

service = Titanium.Android.createService(intent);
service.start();

------------------------------------------------------------------------------------------------------------------------

alarmservice.js

    var service = Titanium.Android.currentService;
    var intent = service.intent;

    Ti.Android.currentActivity.startActivity(intent);

------------------------------------------------------------------------------------------------------------------------

tiapp.xml

    <activity android:name=".MyAppActivity"
    android:label="MyApp" android:theme="@style/Theme.Titanium"
    android:configChanges="keyboardHidden|orientation">
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />
            <category android:name="android.intent.category.LAUNCHER" />
        </intent-filter>
    </activity>
    <services>
        <service type="interval" url="alarmservice.js"/>
    </services>