AppCompatButton与Button的区别
自定义控件的时候会发现Android studio提示Button已被AppCompatButton取代，AppCompatButton继承自Button，新增加了对动态的背景颜色等功能的支持.
A
Buttonwhich supports compatible features on older version of the platform, including:
- Supports
textAllCapsstyle attribute which works back toEclair MR1.- Allows dynamic tint of it background via the background tint methods in
ViewCompat.- Allows setting of the background tint using
backgroundTintandbackgroundTintMode.This will automatically be used when you use
Buttonin your layouts. You should only need to manually use this class when writing custom views.