feat: 优化代码

app/src/main/java/io/legado/app/ui/main/bookshelf/BookshelfFragment.kt

@@ -110,7 +110,9 @@ class BookshelfFragment : VMBaseFragment<BookshelfViewModel>(R.layout.fragment_b
                 }
                 var noGroupSize = 0
                 withContext(IO) {
-                    noGroupSize = App.db.bookDao().noGroupSize
+                    if (AppConfig.bookGroupNoneShow) {
+                        noGroupSize = App.db.bookDao().noGroupSize
+                    }
                 }
                 synchronized(this@BookshelfFragment) {
                     bookGroups.clear()
@@ -162,7 +164,9 @@ class BookshelfFragment : VMBaseFragment<BookshelfViewModel>(R.layout.fragment_b
         launch {
             var noGroupSize = 0
             withContext(IO) {
-                noGroupSize = App.db.bookDao().noGroupSize
+                if (AppConfig.bookGroupNoneShow) {
+                    noGroupSize = App.db.bookDao().noGroupSize
+                }
             }
             synchronized(this@BookshelfFragment) {
                 bookGroups.remove(AppConst.bookGroupAll)

app/src/main/res/menu/book_group_manage.xml

@@ -10,32 +10,36 @@
         app:showAsAction="always"
         tools:ignore="AlwaysShowAction" />
 
-    <item
-        android:id="@+id/menu_group_all"
-        android:title="@string/all"
-        android:checkable="true"
-        android:checked="true"
-        app:showAsAction="never" />
+    <group android:id="@+id/menu_groups">
 
-    <item
-        android:id="@+id/menu_group_local"
-        android:title="@string/local"
-        android:checkable="true"
-        android:checked="true"
-        app:showAsAction="never" />
+        <item
+            android:id="@+id/menu_group_all"
+            android:title="@string/all"
+            android:checkable="true"
+            android:checked="true"
+            app:showAsAction="never" />
 
-    <item
-        android:id="@+id/menu_group_audio"
-        android:title="@string/audio"
-        android:checkable="true"
-        android:checked="true"
-        app:showAsAction="never" />
+        <item
+            android:id="@+id/menu_group_local"
+            android:title="@string/local"
+            android:checkable="true"
+            android:checked="false"
+            app:showAsAction="never" />
 
-    <item
-        android:id="@+id/menu_group_none"
-        android:title="@string/no_group"
-        android:checkable="true"
-        android:checked="true"
-        app:showAsAction="never" />
+        <item
+            android:id="@+id/menu_group_audio"
+            android:title="@string/audio"
+            android:checkable="true"
+            android:checked="false"
+            app:showAsAction="never" />
+
+        <item
+            android:id="@+id/menu_group_none"
+            android:title="@string/no_group"
+            android:checkable="true"
+            android:checked="false"
+            app:showAsAction="never" />
+
+    </group>
 
 </menu>