Hi everyone,
I've finally put a ng-keyDown directive on my input element to detect when the user presses the "Go" button of its keyboard (keyCode 9). I also, by the way, handled the keyCode 13 ("Enter"). Then I call a method of my controller to trigger the form ng-submit code.
It's working in the emulator, it should be working on my Nexus 5 (to be confirmed).
'Hope it will help .