feat: 优化代码

app/src/main/java/io/legado/app/data/dao/BookDao.kt

@@ -64,4 +64,7 @@ interface BookDao {
 
     @Query("update books set durChapterPos = :pos where bookUrl = :bookUrl")
     fun upProgress(bookUrl: String, pos: Int)
+
+    @Query("update books set `group` = :newGroupId where `group` = :oldGroupId")
+    fun upGroup(oldGroupId: Int, newGroupId: Int)
 }

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

@@ -103,6 +103,7 @@ class BookshelfFragment : VMBaseFragment<BookshelfViewModel>(R.layout.fragment_b
         bookGroupLiveData?.removeObservers(viewLifecycleOwner)
         bookGroupLiveData = App.db.bookGroupDao().liveDataAll()
         bookGroupLiveData?.observe(viewLifecycleOwner, Observer {
+            viewModel.checkGroup(it)
             synchronized(this) {
                 tab_layout.removeOnTabSelectedListener(this)
                 bookGroups.clear()

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

@@ -5,6 +5,7 @@ import io.legado.app.App
 import io.legado.app.R
 import io.legado.app.base.BaseViewModel
 import io.legado.app.data.entities.Book
+import io.legado.app.data.entities.BookGroup
 import io.legado.app.data.entities.BookSource
 import io.legado.app.model.WebBook
 import io.legado.app.utils.NetworkUtils
@@ -62,4 +63,21 @@ class BookshelfViewModel(application: Application) : BaseViewModel(application)
         }
     }
 
+    fun checkGroup(groups: List<BookGroup>) {
+        execute {
+            groups.forEach { group ->
+                if (group.groupId and (group.groupId - 1) != 0) {
+                    var id = 1
+                    val idsSum = App.db.bookGroupDao().idsSum
+                    while (id and idsSum != 0) {
+                        id = id.shl(1)
+                    }
+                    App.db.bookGroupDao().delete(group)
+                    App.db.bookGroupDao().insert(group.copy(groupId = id))
+                    App.db.bookDao().upGroup(group.groupId, id)
+                }
+            }
+        }
+    }
+
 }