Tween补间动画

主AC包含各类API:

package com.example.tween;

import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
import android.view.View;
import android.view.animation.AlphaAnimation;
import android.view.animation.Animation;
import android.view.animation.AnimationSet;
import android.view.animation.AnimationUtils;
import android.view.animation.RotateAnimation;
import android.view.animation.ScaleAnimation;
import android.view.animation.TranslateAnimation;
import android.widget.ImageView;

public class MainActivity extends Activity {

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

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
	// Inflate the menu; this adds items to the action bar if it is present.
	getMenuInflater().inflate(R.menu.main, menu);
	return true;
    }

    /**
     * 透明度
     * @param v
     */
    public void click1(View v)
    {
	AlphaAnimation animation=new AlphaAnimation(0.0f,1.0f);
	//动画播放时间
	animation.setDuration(2000);
	//重复几回 一个3次
	animation.setRepeatCount(2);
	animation.setRepeatMode(AlphaAnimation.REVERSE);
	iv.startAnimation(animation);
    }
    
    /**
     * 缩放
     * @param v
     */
    public void click2(View v)
    {
        //参数含义很简单 开始x比例 最终x比例 开始Y比例……缩放中心的类型，缩放中心位置（比例）
	ScaleAnimation animation=new ScaleAnimation(0.2f, 2.0f, 0.2f, 2.0f, Animation.RELATIVE_TO_SELF, 0.5f, Animation.RELATIVE_TO_SELF, 0.5f);
	
	//动画播放时间
	animation.setDuration(2000);
	//重复几回 一个3次
	animation.setRepeatCount(2);
	animation.setRepeatMode(Animation.REVERSE);
	iv.startAnimation(animation);
    }
    
    /**
     * 旋转
     * @param v
     */
    public void click3(View v)
    {
	RotateAnimation animation=new RotateAnimation(0, 360, Animation.RELATIVE_TO_SELF, 0.5f, Animation.RELATIVE_TO_SELF, 0.5f);
	//动画播放时间
	animation.setDuration(2000);
	//重复几回 一个3次
	animation.setRepeatCount(2);
	animation.setRepeatMode(Animation.REVERSE);
	iv.startAnimation(animation);
    }
    
    /**
     * 平移
     * @param v
     */
    public void click4(View v)
    {
	TranslateAnimation animation=
		new TranslateAnimation
		(Animation.RELATIVE_TO_PARENT, 0.2f, Animation.RELATIVE_TO_PARENT, 1.0f, Animation.RELATIVE_TO_PARENT, 0.2f, Animation.RELATIVE_TO_PARENT, 1.0f);
	//动画播放时间
	animation.setDuration(2000);
	//重复几回 一个3次
	animation.setRepeatCount(2);
	animation.setRepeatMode(Animation.REVERSE);
	iv.startAnimation(animation);
    }
    
    /**
     * 组合
     * @param v
     */
    public void click5(View v)
    {
	AnimationSet animationSet=new AnimationSet(false);
	
	RotateAnimation ra=new RotateAnimation(0, 360, Animation.RELATIVE_TO_SELF, 0.5f, Animation.RELATIVE_TO_SELF, 0.5f);
	//动画播放时间
		ra.setDuration(2000);
		//重复几回 一个3次
		ra.setRepeatCount(2);
		ra.setRepeatMode(Animation.REVERSE);
	TranslateAnimation ta=
		new TranslateAnimation
		(Animation.RELATIVE_TO_PARENT, 0.2f, Animation.RELATIVE_TO_PARENT, 0.5f, Animation.RELATIVE_TO_PARENT, 0.2f, Animation.RELATIVE_TO_PARENT, 0.5f);
	//动画播放时间
		ta.setDuration(2000);
		//重复几回 一个3次
		ta.setRepeatCount(2);
		ta.setRepeatMode(Animation.REVERSE);
	ScaleAnimation sa=new ScaleAnimation(0.2f, 2.0f, 0.2f, 2.0f, Animation.RELATIVE_TO_SELF, 0.5f, Animation.RELATIVE_TO_SELF, 0.5f);
	//动画播放时间
		sa.setDuration(2000);
		//重复几回 一个3次
		sa.setRepeatCount(2);
		sa.setRepeatMode(Animation.REVERSE);
		animationSet.addAnimation(ra);
		animationSet.addAnimation(ta);
		animationSet.addAnimation(sa);
	iv.startAnimation(animationSet);
    }
    
    /**
     * XMl文件指定动画
     * @param v
     */
    public void click6(View v)
    {
	iv.startAnimation(AnimationUtils.loadAnimation(this, R.anim.alpha_anim));
	
    }
}

也可以使用XMl文件定义：其中有p的表示parent

很简单