android tween动画效果

anim文件夹下

 <?xml version="1.0" encoding="utf-8"?>
 <set xmlns:android="http://schemas.android.com/apk/res/android"
     android:shareInterpolator="false" >

     <alpha
         android:duration="1000"
         android:fromAlpha="1"
         android:repeatCount="infinite"
         android:repeatMode="reverse"
         android:toAlpha="0" />

 </set>

 package com.itheima.tween;

 import android.app.Activity;
 import android.os.Bundle;
 import android.view.View;
 import android.view.animation.Animation;
 import android.view.animation.AnimationUtils;
 import android.widget.ImageView;

 public class MainActivity extends Activity {

     private ImageView imageView;

     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_main);
         imageView = (ImageView) findViewById(R.id.imageView);
     }

     public void alpha(View v) {
         Animation anim = AnimationUtils.loadAnimation(this, R.anim.alpha);    // 加载XML定义动画特效
 //        anim.setFillAfter(true);            // 保持结束时的画面
         imageView.startAnimation(anim);        // 应用动画特效
     }

     public void scale(View v) {
         Animation anim = AnimationUtils.loadAnimation(this, R.anim.scale);
         imageView.startAnimation(anim);
     }

     public void rotate(View v) {
         Animation anim = AnimationUtils.loadAnimation(this, R.anim.rotate);
         imageView.startAnimation(anim);
     }

     public void translate(View v) {
         Animation anim = AnimationUtils.loadAnimation(this, R.anim.translate);
         imageView.startAnimation(anim);
     }

     public void combo(View v) {
         Animation anim = AnimationUtils.loadAnimation(this, R.anim.combo);
         imageView.startAnimation(anim);
     }

 }