Trouble with ion-nav-view and Android

Hello,
I am new to Ionic and I can’t manage to make ‘simple’ apps using ion-nav-view work on Android.

I have tried the code from the ion-nav-view example (see http://ionicframework.com/docs/api/directive/ionNavView/). The app seems to work just fine on my computer browser, yet when I try to launch it on my Android emulator or device, it only shows a blank screen.

If it can help, I am working on a VM running Ubuntu 14.0.3, the Android emulator uses API 21, and my Android device is a Nexus 7.

Many thanks for your help !