I googled and found several options for how this can be done, but none of them suited me ... I think the whole thing is that with the advent of the new facebook library, previous methods now do not work ...
The last thing I tried and did without errors is just to ask
style="@style/FacebookLoginButton" And in the style I just indicate the background I need ...
This is the only thing that works for me without errors, but in this case, the standard image of this button is superimposed over my background, which I set in styles ...
Who recently customized this button tell me how to do it right?
LogInwas written on the button and nothing else ... - Aleksey Timoshchenko