how can i make sure that android app i create using android studio is going to work on all android devices(I am testing app on android 10 to 14) [closed]

Closed 5 hours ago.

how can i make sure that android app i create using android studio is going to work on all android devices(I am testing app on android 10 to 14) [closed]

Closed 5 hours ago.

Android TextView.setText(R.string.text_from_string.xml_file); does not show font colors predefined in string.xml file

I put some strings in string.xml file as follows.

I can’t open app after installing it Android

I’m working on my first Android app for work time tracking.

White Space Under the bottom navbar

I don’t know I have tried changing the icon, changing the layout almost everything but cannot get rid of the white space under the bottom navbar.