android Tween Animations（动画效果-代码实现）的使用

程序功能：

程序中有四个按钮（Alpha, Scale, Rotate, Translate）和一个图片：

分别点击四个按钮，则图片和对应的按钮分别执行：淡入淡出、缩放、旋转、移动动画效果。

代码如下：

AppMain.java

package lxy.litsoft;

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

public class AppMain extends Activity {
	
	//声明对象
	private ImageView imageView;
	private Button btAlpha;
	private Button btScale;
	private Button btRotate;
	private Button btTranslate;
	
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        
        //实例化对象
        imageView = (ImageView)findViewById(R.id.imageView01);
        
        btAlpha = (Button)findViewById(R.id.button01);
        btAlpha.setOnClickListener(new ButtonListener());
        
        btScale = (Button)findViewById(R.id.button02);
        btScale.setOnClickListener(new ButtonListener());
        
        btRotate = (Button)findViewById(R.id.button03);
        btRotate.setOnClickListener(new ButtonListener());
        
        btTranslate = (Button)findViewById(R.id.button04);
        btTranslate.setOnClickListener(new ButtonListener());
    }
    
    class ButtonListener implements OnClickListener{

		public void onClick(View v) {
			if(v.getId() == R.id.button01){	//Alpha:淡入淡出效果
				//创建AnimationSet对象
				AnimationSet animationSet = new AnimationSet(true);	
				//从透明度1，到透明度0
				AlphaAnimation alphaAnimation = new AlphaAnimation(0,1);
				//动画执行时间
				alphaAnimation.setDuration(1000);	
				//把动画添加到动画集中
				animationSet.addAnimation(alphaAnimation);	
				//把动画绑定控件
				imageView.startAnimation(animationSet);					
				btAlpha.startAnimation(animationSet);
				
			} else if(v.getId() == R.id.button02){	//Scale:缩放效果
				AnimationSet animationSet = new AnimationSet(true);
				ScaleAnimation scaleAnimation = new ScaleAnimation(1,1,0,1,
						Animation.RELATIVE_TO_SELF,0.5f,
						Animation.RELATIVE_TO_SELF,0.5f);
				scaleAnimation.setDuration(1000);
				animationSet.addAnimation(scaleAnimation);
				imageView.startAnimation(animationSet);
				btScale.startAnimation(animationSet);
				
			} else if(v.getId() == R.id.button03){	//Rotate:旋转效果
				AnimationSet animationSet = new AnimationSet(true);
				RotateAnimation rotateAnimation = new RotateAnimation(0f,360f,//旋转角度的变化范围
						Animation.RELATIVE_TO_SELF, 0.5f,		//旋转中心X的位置确定
						Animation.RELATIVE_TO_SELF,0.5f);		//旋转中心Y的位置确定
				rotateAnimation.setDuration(1000);
				animationSet.addAnimation(rotateAnimation);
//				imageView.startAnimation(animationSet);
				btRotate.startAnimation(animationSet);
			}else if(v.getId() == R.id.button04){	//Translate:移动效果
				AnimationSet animationSet = new AnimationSet(true);
				TranslateAnimation translateAnimation = new TranslateAnimation(
						Animation.RELATIVE_TO_SELF, 1,
						Animation.RELATIVE_TO_SELF,0,
						Animation.RELATIVE_TO_SELF,1,
						Animation.RELATIVE_TO_SELF,0);
				translateAnimation.setDuration(1000);
				animationSet.addAnimation(translateAnimation);
				imageView.startAnimation(animationSet);
				btTranslate.startAnimation(animationSet);
			}
		}
    }
}

main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    >
	<TextView  
	    android:layout_width="fill_parent" 
	    android:layout_height="wrap_content" 
	    android:text="@string/hello" />
	 
	<LinearLayout
	    android:orientation="vertical"
	    android:layout_weight="1"
	    android:layout_width="fill_parent"
	    android:layout_height="fill_parent" >
	    <ImageView
	    	android:id="@+id/imageView01"
	    	android:layout_width="wrap_content"
	    	android:layout_height="wrap_content"
	    	android:layout_marginTop="150dip"
	    	android:layout_marginLeft="200dip"
	    	android:src="@drawable/icon"></ImageView>
	    
    </LinearLayout>   
    <LinearLayout
	    android:orientation="vertical"
	    android:layout_weight="1"
	    android:layout_width="fill_parent"
	    android:layout_height="fill_parent" >
	    <Button
		    android:id="@+id/button01"
		    android:layout_width="fill_parent"
		    android:layout_height="wrap_content"
		    android:text="Alpha"></Button>
		<Button
		    android:id="@+id/button02"
		    android:layout_width="fill_parent"
		    android:layout_height="wrap_content"
		    android:text="Scale"></Button>
		<Button
		    android:id="@+id/button03"
		    android:layout_width="fill_parent"
		    android:layout_height="wrap_content"
		    android:text="Rotate"></Button>
		<Button
		    android:id="@+id/button04"
		    android:layout_width="fill_parent"
		    android:layout_height="wrap_content"
		    android:text="Translate"></Button>
    </LinearLayout>
</LinearLayout>

另外：

Tween Animations的通用属性
1.setDuration(long durationMills);//设置动画执行事件（单位：毫秒）
2.setFillAfter(boolean fillAfter);//如果fillAfter的值为true,则动画执行后，
控件将停留在执行结果的状态
3.setFillBefore(boolen fillBefore);//如果fillBefore的值为true,则动画执行后，
控件将回到动画执行之前的状态
4.setStartOffSet(long startOffSet);//设置动画执行之前的等待时间
5.setRepeatCount(int repeatCount);//设置动画重复执行的次数