【案例】rotate
anim/rotate.xml

<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android"><rotateandroid:fromDegrees="0"android:toDegrees="360"android:pivotX="50%"android:pivotY="50%"android:duration="2000"android:repeatCount="infinite"android:repeatMode="restart"android:toAlpha="1.0"/></set>

java:

package com.example.myapplication;import android.os.Bundle;
import android.view.animation.Animation;
import android.view.animation.AnimationUtils;
import android.widget.ImageView;import androidx.appcompat.app.AppCompatActivity;public class MainActivity3 extends AppCompatActivity {private ImageView iv;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main2);iv  = findViewById(R.id.iv);Animation animation = AnimationUtils.loadAnimation(this,R.anim.rotate);iv.setAnimation(animation);}
}

效果：


么么叽么么叽么么哒

（3）缩放动画（scale）
（4）平移动画（translate）
后面再发！