iboss-mini-android-bjmnls/res/drawable/rounded_corners_grey.xml

<?xml version="1.0" encoding="utf-8"?>  
<shape xmlns:android="http://schemas.android.com/apk/res/android">  
    <gradient android:startColor="#c0000000"  android:endColor="#c0000000" android:angle="90" /><!--背景颜色渐变 angle为渐变角度-->  
    <solid android:color="#00ffffff" /><!-- 背景填充颜色 -->  
    <stroke android:width="1dp" android:color="@color/darkgray" /><!-- 描边，边框宽度、颜色 -->  
    <corners android:radius="4dp" /><!-- 边角圆弧的半径 -->  
    <padding android:left="3dp" android:top="3dp" android:right="3dp" android:bottom="3dp" /><!-- 四周留出来的空白 -->  
</shape>