动画的使用—View Animation

ScaleAnimation(float fromX, float toX, float fromY, float toY, float pivotX, float pivotY)

TranslateAnimation(float fromXDelta, float toXDelta, float fromYDelta, float toYDelta)

RotateAnimation(float fromDegrees, float toDegrees, float pivotX, float pivotY)

AlphaAnimation(float fromAlpha, float toAlpha)

package com.whathecode.viewanimation;

import android.os.Bundle;
import android.support.v7.app.ActionBarActivity;
import android.view.View;
import android.view.animation.AlphaAnimation;
import android.view.animation.AnimationSet;
import android.view.animation.CycleInterpolator;
import android.view.animation.RotateAnimation;
import android.view.animation.ScaleAnimation;
import android.view.animation.TranslateAnimation;
import android.widget.ImageView;

public class MainActivity extends ActionBarActivity {
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
    }

    public void onclickMove(View view) {
        ImageView img = (ImageView) findViewById(R.id.image);

        TranslateAnimation ta = new TranslateAnimation(0, 10, 0, 0);
        ta.setInterpolator(new CycleInterpolator(7f));
        ta.setDuration(1000);
        img.startAnimation(ta);
    }

    public void onclickScale(View view) {
        ImageView img = (ImageView) findViewById(R.id.image);

        /**
         * 设置缩放中心的值
         */
        int pivotX = img.getWidth() / 2;
        int pivotY = img.getHeight() / 2;
        
        //初始化缩放对象
        ScaleAnimation sa = new ScaleAnimation(1f, 0.5f, 1f, 0.5f, pivotX,
                pivotY);
        //设置插值器，用于控制动画的行为，这里是控制动画的重复次数3
        sa.setInterpolator(new CycleInterpolator(3f));
        //动画的速率
        sa.setDuration(1500);
        img.startAnimation(sa);
    }

    public void onclickRotate(View view)
    {
        ImageView img = (ImageView) findViewById(R.id.image);
        
        int pivotX = img.getWidth() / 2;
        int pivotY = img.getHeight() / 2;
        RotateAnimation ra = new RotateAnimation(0, 360f, pivotX, pivotY);
        ra.setDuration(1000);
        img.startAnimation(ra);
    }
    
    public void onclickAlpha(View view)
    {
        ImageView img = (ImageView) findViewById(R.id.image);
        
        AlphaAnimation aa = new AlphaAnimation(1f, 0.5f);
        aa.setDuration(1500);
        img.startAnimation(aa);
    }
    
    public void startAnimSet(View view)
    {
        ImageView img = (ImageView) findViewById(R.id.image);
        
        int pivotX = img.getWidth() / 2;
        int pivotY = img.getHeight() / 2;
        RotateAnimation ra = new RotateAnimation(0, 360f, pivotX, pivotY);
        ra.setDuration(1000);
        
        AlphaAnimation aa = new AlphaAnimation(1f, 0.5f);
        aa.setDuration(1500);
        
        //初始化一个空的动画集合
        AnimationSet as = new AnimationSet(false);
        
        //向集合中添加动画
        as.addAnimation(ra);
        as.addAnimation(aa);
        img.startAnimation(as);
    }
}

<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android"
    android:interpolator="@[package:]anim/interpolator_resource"
    android:shareInterpolator=["true" | "false"] >
    <alpha
        android:fromAlpha="float"
        android:toAlpha="float" />
    <scale
        android:fromXScale="float"
        android:toXScale="float"
        android:fromYScale="float"
        android:toYScale="float"
        android:pivotX="float"
        android:pivotY="float" />
    <translate
        android:fromXDelta="float"
        android:toXDelta="float"
        android:fromYDelta="float"
        android:toYDelta="float" />
    <rotate
        android:fromDegrees="float"
        android:toDegrees="float"
        android:pivotX="float"
        android:pivotY="float" />
    <set>
        ...
    </set>
</set>

<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android"
    android:shareInterpolator="false">
    <translate 
        android:fromXDelta="0"
        android:toXDelta="200"
        android:duration="1500"/>    

    <alpha 
        android:fromAlpha="1"
        android:toAlpha="0.5"
        android:duration="1500"
        />
</set>

public void loadAnimRes(View view)
    {
        //使用loadAnimationUtils类加载动画资源
        AnimationSet as = (AnimationSet) AnimationUtils.loadAnimation(this, R.anim.animset);
        img.startAnimation(as);
    }