android studio how to change button color code example

Example 1: cant change button color when app run android studio

replace <Button with <androidx.appcompat.widget.AppCompatButton

Example 2: android studio change button color programmatically

// If you're in an activity:
Button11.setBackgroundColor(getResources().getColor(R.color.red));
// OR, if you're not: 
Button11.setBackgroundColor(Button11.getContext().getResources().getColor(R.color.red));