搜索添加搜索范围可选择单个书源和分组,未完成

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

@@ -36,7 +36,7 @@
     </io.legado.app.ui.widget.dynamiclayout.DynamicFrameLayout>
 
     <LinearLayout
-        android:id="@+id/ll_history"
+        android:id="@+id/ll_input_help"
         android:layout_width="match_parent"
         android:layout_height="0dp"
         android:background="@color/background"
@@ -47,6 +47,31 @@
         app:layout_constraintBottom_toBottomOf="parent"
         app:layout_constraintTop_toBottomOf="@id/title_bar">
 
+        <LinearLayout
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:orientation="horizontal">
+
+            <TextView
+                android:layout_width="0dp"
+                android:layout_height="wrap_content"
+                android:layout_weight="1"
+                android:padding="6dp"
+                android:text="@string/search_scope" />
+
+            <TextView
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:padding="6dp"
+                android:text="@string/toggle_search_scope" />
+
+        </LinearLayout>
+
+        <androidx.recyclerview.widget.RecyclerView
+            android:id="@+id/rv_search_scope"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content" />
+
         <TextView
             android:id="@+id/tv_book_show"
             android:layout_width="match_parent"