优化

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

@@ -1,8 +1,11 @@
 <?xml version="1.0" encoding="utf-8"?>
 <androidx.recyclerview.widget.RecyclerView xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
     android:id="@+id/recycler_view"
     android:layout_width="match_parent"
     android:layout_height="wrap_content"
     android:layout_gravity="center"
     android:background="@color/background_card"
-    android:padding="5dp" />
+    android:orientation="horizontal"
+    android:padding="5dp"
+    app:layoutManager="androidx.recyclerview.widget.LinearLayoutManager" />