重写主题系统

app/src/main/res/drawable/popup_background.xml

@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="utf-8"?>
+<shape xmlns:android="http://schemas.android.com/apk/res/android">
+    <solid android:color="?attr/colorSurfaceContainerLow" />
+    <corners android:radius="12dp" />
+    <padding
+        android:bottom="8dp"
+        android:top="8dp" />
+</shape>