优化

app/src/main/java/io/legado/app/ui/book/arrange/ArrangeBookActivity.kt

@@ -37,6 +37,8 @@ class ArrangeBookActivity : VMBaseActivity<ArrangeBookViewModel>(R.layout.activi
     private var groupId: Int = -1
 
     override fun onActivityCreated(savedInstanceState: Bundle?) {
+        groupId = intent.getIntExtra("groupId", -1)
+        title_bar.subtitle = intent.getStringExtra("groupName") ?: getString(R.string.all)
         initView()
         initGroupData()
         initBookData()

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

@@ -66,7 +66,10 @@ class BookshelfFragment : VMBaseFragment<BookshelfViewModel>(R.layout.fragment_b
                 .show(childFragmentManager, "groupManageDialog")
             R.id.menu_add_local -> startActivity<ImportBookActivity>()
             R.id.menu_add_url -> addBookByUrl()
-            R.id.menu_arrange_bookshelf -> startActivity<ArrangeBookActivity>()
+            R.id.menu_arrange_bookshelf -> startActivity<ArrangeBookActivity>(
+                Pair("groupId", selectedGroup.groupId),
+                Pair("groupName", selectedGroup.groupName)
+            )
             R.id.menu_download -> startActivity<DownloadActivity>()
         }
     }
@@ -78,6 +81,9 @@ class BookshelfFragment : VMBaseFragment<BookshelfViewModel>(R.layout.fragment_b
         return bookGroups[position]
     }
 
+    val selectedGroup: BookGroup
+        get() = bookGroups[view_pager_bookshelf.currentItem]
+
     private fun initRecyclerView() {
         tab_layout.isTabIndicatorFullWidth = false
         tab_layout.tabMode = TabLayout.MODE_SCROLLABLE