优化

app/src/main/java/io/legado/app/data/entities/BookSource.kt

@@ -118,18 +118,20 @@ data class BookSource(
 
     fun getContentRule() = ruleContent ?: ContentRule()
 
-    fun addGroup(group: String) {
+    fun addGroup(group: String): BookSource {
         bookSourceGroup?.splitNotBlank(AppPattern.splitGroupRegex)?.toHashSet()?.let {
             it.add(group)
             bookSourceGroup = TextUtils.join(",", it)
         }
+        return this
     }
 
-    fun removeGroup(group: String) {
+    fun removeGroup(group: String): BookSource {
         bookSourceGroup?.splitNotBlank(AppPattern.splitGroupRegex)?.toHashSet()?.let {
             it.remove(group)
             bookSourceGroup = TextUtils.join(",", it)
         }
+        return this
     }
 
     fun equal(source: BookSource) =

app/src/main/java/io/legado/app/ui/book/source/manage/BookSourceViewModel.kt

@@ -3,7 +3,6 @@ package io.legado.app.ui.book.source.manage
 import android.app.Application
 import android.text.TextUtils
 import io.legado.app.base.BaseViewModel
-import io.legado.app.constant.AppPattern
 import io.legado.app.data.appDb
 import io.legado.app.data.entities.BookSource
 import io.legado.app.utils.*
@@ -94,8 +93,7 @@ class BookSourceViewModel(application: Application) : BaseViewModel(application)
         execute {
             val list = arrayListOf<BookSource>()
             sources.forEach { source ->
-                source.addGroup(groups)
-                list.add(source)
+                list.add(source.copy().addGroup(groups))
             }
             appDb.bookSourceDao.update(*list.toTypedArray())
         }
@@ -105,8 +103,7 @@ class BookSourceViewModel(application: Application) : BaseViewModel(application)
         execute {
             val list = arrayListOf<BookSource>()
             sources.forEach { source ->
-                source.removeGroup(groups)
-                list.add(source)
+                list.add(source.copy().removeGroup(groups))
             }
             appDb.bookSourceDao.update(*list.toTypedArray())
         }