bg_dialog_shape.xml

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
       android:shape="rectangle">
    <!-- 填充颜色 -->
    <solid android:color="@color/white"/>
    <!-- 矩形的圆角半径 -->
    <corners android:radius="5dp"/>
</shape>