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0AlphaAnimation 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

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