I had to fix the ugly white page that shows for a bit before the app starts (using B4XPages).
There is this tutorial by Erel in the forum: https://www.b4x.com/android/forum/threads/b4x-b4xpages-splash-screen.120851/
that explains how to do everything, with a beautiful video by...
The question is the following:
I already have the app ready, but when I open it, first a kind of dark screen with the title of the app (before loading the layout) comes out which makes the app not look very good.
Any other App starts immediately and does not show that kind of delay.