style: 主题色

app/src/main/res/layout/dialog_file_chooser.xml

@@ -16,12 +16,13 @@
         android:layout_height="24dp"
         android:paddingLeft="10dp"
         android:paddingRight="10dp"
-        android:background="@color/background"
+        android:background="@color/background_card"
         android:elevation="5dp" />
 
     <FrameLayout
         android:layout_width="match_parent"
-        android:layout_height="match_parent">
+        android:layout_height="match_parent"
+        android:background="@color/background_card">
 
         <androidx.recyclerview.widget.RecyclerView
             android:id="@+id/rv_file"

app/src/main/res/layout/dialog_recycler_view.xml

@@ -12,6 +12,7 @@
 
     <androidx.recyclerview.widget.RecyclerView
         android:id="@+id/recycler_view"
+        android:background="@color/background_card"
         android:layout_width="match_parent"
         android:layout_height="match_parent" />