android中动画效果的运用

package cn.edu.animtest;import android.app.Activity;import android.os.Bundle;import android.view.animation.Animation;import android.view.animation.AnimationUtils;import android.widget.ImageView;public class AnimTestActivity extends Activity {    /** Called when the activity is first created. */    @Override    public void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.main);       Animation myAnimation= AnimationUtils.loadAnimation(this,R.anim.anim);//加载动画       ImageView myImageView = (ImageView) this.findViewById(R.id.myImageView);//得到ImageView的引用        myImageView.startAnimation(myAnimation);//启动动画    }}

在res文件夹下，新建anim.xml文件

<?xml version="1.0" encoding="utf-8"?><set xmlns:android="http://schemas.android.com/apk/res/android">   <alphaandroid:fromAlpha="0.1" android:toAlpha="1.0" android:duration="8000"   /> <!-- 透明度的变换 -->  <scaleandroid:interpolator= "@android:anim/accelerate_decelerate_interpolator" android:fromXScale="0.0" android:toXScale="1.4" android:fromYScale="0.0" android:toYScale="1.4" android:pivotX="50%" android:pivotY="50%"android:fillAfter="false" android:duration="10000"  /> <!-- 尺寸的变换 -->  <translateandroid:fromXDelta="30" android:toXDelta="0" android:fromYDelta="30"android:toYDelta="50" android:duration="10000"   /> <!-- 尺位置的变换 -->  <rotateandroid:interpolator="@android:anim/accelerate_decelerate_interpolator" android:fromDegrees="0" android:toDegrees="+350" android:pivotX="50%" android:pivotY="50%"android:duration="10000"  /> <!-- 旋转变换 --></set>

再布局文件中，增加ImageView

<ImageView android:id="@+id/myImageView"android:layout_width="fill_parent"android:layout_height="fill_parent"android:src="@drawable/icon"/>

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