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);    
    }

}