feat: 优化代码

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

@@ -110,8 +110,10 @@ class BookshelfFragment : VMBaseFragment<BookshelfViewModel>(R.layout.fragment_b
                 }
                 var noGroupSize = 0
                 withContext(IO) {
+                    if (AppConfig.bookGroupNoneShow) {
                         noGroupSize = App.db.bookDao().noGroupSize
                     }
+                }
                 synchronized(this@BookshelfFragment) {
                     bookGroups.clear()
                     if (AppConfig.bookGroupAllShow) {
@@ -162,8 +164,10 @@ class BookshelfFragment : VMBaseFragment<BookshelfViewModel>(R.layout.fragment_b
         launch {
             var noGroupSize = 0
             withContext(IO) {
+                if (AppConfig.bookGroupNoneShow) {
                     noGroupSize = App.db.bookDao().noGroupSize
                 }
+            }
             synchronized(this@BookshelfFragment) {
                 bookGroups.remove(AppConst.bookGroupAll)
                 bookGroups.remove(AppConst.bookGroupLocal)

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

@@ -10,6 +10,8 @@
         app:showAsAction="always"
         tools:ignore="AlwaysShowAction" />
 
+    <group android:id="@+id/menu_groups">
+
         <item
             android:id="@+id/menu_group_all"
             android:title="@string/all"
@@ -21,21 +23,23 @@
             android:id="@+id/menu_group_local"
             android:title="@string/local"
             android:checkable="true"
-        android:checked="true"
+            android:checked="false"
             app:showAsAction="never" />
 
         <item
             android:id="@+id/menu_group_audio"
             android:title="@string/audio"
             android:checkable="true"
-        android:checked="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"
+            android:checked="false"
             app:showAsAction="never" />
 
+    </group>
+
 </menu>