Android Button setting android:background="@drawable/xxx" is invalid, <item android:drawable="@color/purple_200"/> is invalid...

Problem Description:

Android Button setting android:background="@drawable/xxx" is invalid, <item android:drawable="@color/purple_200"/> is invalid

 Solution:

find res/values/themes.xmlthe file, put

parent="Theme.MaterialComponents.DayNight.DarkActionBar"

 changed to

parent="Theme.MaterialComponents.DayNight.NoActionBar.Bridge"

problem solved!

Thanks: https://blog.csdn.net/zz00008888/article/details/120563791