Activity代碼中添加getWindow().setBackgroundDrawableResource(android.R.color.transparent);
創建背景shape文件
<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android" >
<corners android:radius="10dp" />
<solid android:color="@color/background" />
</shape>
佈局XML文件添加
android:background="@drawable/corner_dialog"