RotateAnimation旋转动画Demo

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一、在java中实现动画：

package com.jikexueyuan.rotateanimation;import android.app.Activity;import android.os.Bundle;import android.view.View;import android.view.animation.Animation;import android.view.animation.AnimationUtils;import android.view.animation.RotateAnimation;public class MainActivity extends Activity {private RotateAnimation ra;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);                ra = new RotateAnimation(        0 //fromDegrees起始角度        , 360 //toDegrees旋转角度        , Animation.RELATIVE_TO_SELF, 0.5f,//pivotXType 旋转中心的X轴        //RELATIVE_TO_SELF:相对自身        Animation.RELATIVE_TO_SELF, 0.5f//pivotXValue 旋转中心的Y轴        );        ra.setDuration(1000);                findViewById(R.id.btnRotateMe).setOnClickListener(new View.OnClickListener() {@Overridepublic void onClick(View arg0) {arg0.startAnimation(ra);}});    }}

二、在ra.xml中实现动画：

package com.jikexueyuan.rotateanimation;import android.app.Activity;import android.os.Bundle;import android.view.View;import android.view.animation.AnimationUtils;import android.view.animation.RotateAnimation;public class MainActivity extends Activity {private RotateAnimation ra;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);                findViewById(R.id.btnRotateMe).setOnClickListener(new View.OnClickListener() {@Overridepublic void onClick(View arg0) {arg0.startAnimation(AnimationUtils.loadAnimation(MainActivity.this, R.anim.ra));}});    }}

ra.xml:

<?xml version="1.0" encoding="utf-8"?><rotate xmlns:android="http://schemas.android.com/apk/res/android"    android:fromDegrees="0"    android:toDegrees="360"    android:duration="1000"    android:pivotX="50%"    android:pivotY="50%" ></rotate>

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