First steps troubles

Hello, I just began implementing drupalgap on a test website since some weeks. I've red the tutorial on drupalgap.org and installed all the needed components:
drupalgap module for drupal 7, version 7.x-1.10+5-dev, on a separated virtual machine
nodejs v0.10.36
cordova 4.2.0
latest android sdk for linux
openjdk-8
optionally latest eclipse ide

Then I've created a cordova project, added android platform, run the quick test on an android emulator and it worked as expectet, showing the "device connected" banner
Then I've added to the same project the cordova plugins as shown in the howto, and overwritten the www folder with the one downloaded from my drupal website; set drupal.settings.mode=phonegap in settings.js (also pointed the url to the IP of my virtual machine where drupal is hosted), used cordova.index.html as index.html (but even using the original index.html doesn't change the result), issued the commands cordova build, cordova prepare & cordova run android. Well what I get is just the blue logo of drupalgap... I get the sam result by using DrupalGap-7.x-1.0-rc5 instead of the www folder of my drupal installation.
If I use instead drupal.settings.mode=web-app, use default.index.html, rebuild & run emulator, I get the right view, with menus, login button etc, I can create and edit content on my website...
The same results appear if I load the apk on mi asus mini pad instead of the android emulator.

In the first case it looks like no javascript is loaded, or maybe a wrong version of some package, or maybe I should edit some file, but I really don't know what's wrong, maybe I've missed something obvious which is not like that for me. I want to point out that I'm completely noob about js & creating apps in general but I'm slowly trying to learn, while I know drupal. Thank you.