xml - -背景圆

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

    <solid android:color="@color/white" />

    <stroke
        android:width="1dp"
        android:color="@color/white" />

    <size
        android:height="200dp"
        android:width="200dp" />

</shape>