so I tried android:selectAllOnFocus and of course I'm using android:hint.
The app loads, requestFocus triggers and the full text is selected. 

The problem is that when I click in the EditText the selection is lost. 

I've already read:
[Select all text inside EditText when it gets focus](https://stackoverflow.com/questions/4669464/select-all-text-inside-edittext-when-it-gets-focus)