1 public static Animator createCircularReveal(View view,int centerX,  int centerY, float startRadius, float endRadius) {
2     return new RevealAnimator(view, centerX, centerY, startRadius, endRadius);
3 }

 1 <?xml version="1.0" encoding="utf-8"?>
 2 <shape
 3     xmlns:android="http://schemas.android.com/apk/res/android"
 4     android:shape="oval"
 5     android:useLevel="false">
 6     <!--oval是 shape的属性之一，意思是 椭圆-->
 7     <!--solid 是shape 的孩子之一，作用是实现填充-->
 8     <solid android:color="#ff49fdfa"/>
 9     <!--size 也是shape 的孩子之一，作用是实现 长宽限制-->
10     <size
11         android:width="300dp"
12         android:height="300dp" />
13 </shape>

 1 <?xml version="1.0" encoding="utf-8"?>
 2 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
 3     android:orientation="vertical"
 4     android:layout_width="match_parent"
 5     android:layout_height="match_parent">
 6
 7     <LinearLayout
 8         android:id="@+id/linearTestScale"
 9         android:orientation="vertical"
10         android:layout_width="10dp"
11         android:background="@drawable/a"
12         android:layout_height="10dp">
13
14         </LinearLayout>
15     <Button
16         android:id="@+id/btnTestScale"
17         android:text="xxx"
18         android:layout_width="wrap_content"
19         android:layout_height="wrap_content"
20         />
21 </LinearLayout>

 1 package com.LGH.ui.activity;
 2
 3 import android.animation.AnimatorSet;
 4 import android.animation.ObjectAnimator;
 5 import android.app.Activity;
 6 import android.os.Bundle;
 7 import android.view.View;
 8 import android.view.animation.LinearInterpolator;
 9 import android.widget.Button;
10 import android.widget.LinearLayout;
11
12 import io.github.froger.instamaterial.R;
13
14 /**
15  * Created by Administrator on 2015/6/29.
16  */
17 public class test extends Activity{
18
19     Button btnTestScale;
20     LinearLayout linearTestScale;
21
22     @Override
23     protected void onCreate(Bundle savedInstanceState) {
24         super.onCreate(savedInstanceState);
25         setContentView(R.layout.test);
26         btnTestScale = (Button) findViewById(R.id.a);
27         linearTestScale = (LinearLayout) findViewById(R.id.aaa);
28         btnTestScale.setOnClickListener(new View.OnClickListener() {
29             @Override
30             public void onClick(View v) {
31                 ObjectAnimator revealAnimator = ObjectAnimator.ofFloat( //缩放X 轴的
32                         linearTestScale, "scaleX", 0, 200);
33                 ObjectAnimator revealAnimator1 = ObjectAnimator.ofFloat(//缩放Y 轴的
34                         linearTestScale, "scaleY", 0, 200);
35                 AnimatorSet set = new AnimatorSet();
36                 set.setDuration(500);//设置播放时间
37                 set.setInterpolator(new LinearInterpolator());//设置播放模式，这里是平常模式
38                 set.playTogether(revealAnimator, revealAnimator1);//设置一起播放
39                 set.start();
40             }
41         });
42     }
43 }