Two animation writing methods commonly used in Android

There are two animations commonly used in Android, one is Tween Animation and the other is Frame Animation. The tween animation is realized by using a picture; the definition gives two key frames, and the given attribute value is gradually changed between the two key frames within a given time by some algorithms, which is a frame animation. Generally, the two animations are written as follows :

1. Tween Animation

Mainly divided into: gradient alpha
rotate rotate
translate translate
zoom scale

res/anim/XXXX.xml ---> root node <set>

three elements: start state, end state, animation duration

General writing:

1. Realize by using xml document + Java code