feat: 优化代码

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

@@ -32,6 +32,7 @@ class ArrangeBookActivity : VMBaseActivity<ArrangeBookViewModel>(R.layout.activi
         get() = getViewModel(ArrangeBookViewModel::class.java)
     override val groupList: ArrayList<BookGroup> = arrayListOf()
     private val groupRequestCode = 22
+    private val addToGroupRequestCode = 34
     private lateinit var adapter: ArrangeBookAdapter
     private var groupLiveData: LiveData<List<BookGroup>>? = null
     private var booksLiveData: LiveData<List<Book>>? = null
@@ -151,6 +152,7 @@ class ArrangeBookActivity : VMBaseActivity<ArrangeBookViewModel>(R.layout.activi
                 viewModel.upCanUpdate(adapter.selectedBooks.toTypedArray(), true)
             R.id.menu_update_disable ->
                 viewModel.upCanUpdate(adapter.selectedBooks.toTypedArray(), true)
+            R.id.menu_add_to_group -> selectGroup(0, addToGroupRequestCode)
         }
         return false
     }
@@ -182,6 +184,13 @@ class ArrangeBookActivity : VMBaseActivity<ArrangeBookViewModel>(R.layout.activi
                     viewModel.updateBook(it.copy(group = groupId))
                 }
             }
+            addToGroupRequestCode -> {
+                val books = arrayListOf<Book>()
+                adapter.selectedBooks.forEach {
+                    books.add(it.copy(group = it.group or groupId))
+                }
+                viewModel.updateBook(*books.toTypedArray())
+            }
         }
     }
 

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

@@ -1,6 +1,10 @@
 <?xml version="1.0" encoding="utf-8"?>
 <menu xmlns:android="http://schemas.android.com/apk/res/android">
 
+    <item
+        android:id="@+id/menu_del_selection"
+        android:title="@string/delete" />
+
     <item
         android:id="@+id/menu_update_enable"
         android:title="@string/allow_update" />
@@ -10,7 +14,7 @@
         android:title="@string/disable_update" />
 
     <item
-        android:id="@+id/menu_del_selection"
-        android:title="@string/delete" />
+        android:id="@+id/menu_add_to_group"
+        android:title="@string/add_to_group" />
 
 </menu>

app/src/main/res/values/strings.xml

@@ -638,4 +638,5 @@
     <string name="title_left">靠左</string>
     <string name="title_center">居中</string>
     <string name="title_hide">隐藏</string>
+    <string name="add_to_group">加入分组</string>
 </resources>