效果圖:

Paste_Image.png

<?xml version="1.0" encoding="utf-8"?>
<!-- android:shape指定形狀 -->
<shape xmlns:android="http://schemas.android.com/apk/res/android"
android:shape="oval">

<!-- padding設置內(nèi)間距 -->    
<padding        
android:bottom="5dp" 
android:left="5dp"
android:right="5dp"
android:top="5dp" />   
 
<!-- size設置形狀的大小 -->    
<size
android:width="120dp"
android:height="120dp" />   

 <!-- gradient設置漸變 -->  
  <gradient
android:endColor="#00FFFFFF" 
android:gradientRadius="100dp"
android:startColor="#abd419"       
android:type="radial" /> 

<stroke        
android:width="10dp"        
android:color="#000000"        />

</shape>

代碼片段