优化排序号相同导致的排序问题

app/src/main/java/io/legado/app/base/adapter/RecyclerAdapter.kt

@@ -321,7 +321,7 @@ abstract class RecyclerAdapter<ITEM, VB : ViewBinding>(protected val context: Co
 
     fun getItemByLayoutPosition(position: Int) = items.getOrNull(getActualPosition(position))
 
-    fun getItems(): List<ITEM> = items
+    fun getItems(): List<ITEM> = items.toList()
 
     protected open fun getItemViewType(item: ITEM, position: Int) = 0
 

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

@@ -158,9 +158,6 @@ interface BookSourceDao {
     @get:Query("select max(customOrder) from book_sources")
     val maxOrder: Int
 
-    @Query("select count(*) from (select customOrder, count(customOrder) from book_sources group by customOrder having count(customOrder) > 1)")
-    fun sameSortNumberSize(): Int
-
     private fun dealGroups(list: List<String>): List<String> {
         val groups = linkedSetOf<String>()
         list.forEach {

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

@@ -596,8 +596,8 @@ class BookSourceActivity : VMBaseActivity<ActivityBookSourceBinding, BookSourceV
         }
     }
 
-    override fun upOrder() {
-        viewModel.upOrder()
+    override fun upOrder(items: List<BookSource>) {
+        viewModel.upOrder(items)
     }
 
     override fun toTop(bookSource: BookSource) {

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

@@ -263,15 +263,11 @@ class BookSourceAdapter(context: Context, val callBack: CallBack) :
         val srcItem = getItem(srcPosition)
         val targetItem = getItem(targetPosition)
         if (srcItem != null && targetItem != null) {
-            if (srcItem.customOrder == targetItem.customOrder) {
-                callBack.upOrder()
-            } else {
-                val srcOrder = srcItem.customOrder
-                srcItem.customOrder = targetItem.customOrder
-                targetItem.customOrder = srcOrder
-                movedItems.add(srcItem)
-                movedItems.add(targetItem)
-            }
+            val srcOrder = srcItem.customOrder
+            srcItem.customOrder = targetItem.customOrder
+            targetItem.customOrder = srcOrder
+            movedItems.add(srcItem)
+            movedItems.add(targetItem)
         }
         swapItem(srcPosition, targetPosition)
         return true
@@ -281,7 +277,15 @@ class BookSourceAdapter(context: Context, val callBack: CallBack) :
 
     override fun onClearView(recyclerView: RecyclerView, viewHolder: RecyclerView.ViewHolder) {
         if (movedItems.isNotEmpty()) {
-            callBack.update(*movedItems.toTypedArray())
+            val sortNumberSet = hashSetOf<Int>()
+            movedItems.forEach {
+                sortNumberSet.add(it.customOrder)
+            }
+            if (movedItems.size > sortNumberSet.size) {
+                callBack.upOrder(getItems())
+            } else {
+                callBack.update(*movedItems.toTypedArray())
+            }
             movedItems.clear()
         }
     }
@@ -319,7 +323,7 @@ class BookSourceAdapter(context: Context, val callBack: CallBack) :
         fun toBottom(bookSource: BookSource)
         fun searchBook(bookSource: BookSource)
         fun debug(bookSource: BookSource)
-        fun upOrder()
+        fun upOrder(items: List<BookSource>)
         fun upCountView()
     }
 }

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

@@ -16,19 +16,6 @@ import java.io.FileOutputStream
  */
 class BookSourceViewModel(application: Application) : BaseViewModel(application) {
 
-    init {
-        execute {
-            val sameSortNumberSize = appDb.bookSourceDao.sameSortNumberSize()
-            if (sameSortNumberSize > 0) {
-                val sources = appDb.bookSourceDao.all
-                sources.forEachIndexed { index, bookSource ->
-                    bookSource.customOrder = index
-                    appDb.bookSourceDao.update(bookSource)
-                }
-            }
-        }
-    }
-
     fun topSource(vararg sources: BookSource) {
         execute {
             sources.sortBy { it.customOrder }
@@ -64,13 +51,14 @@ class BookSourceViewModel(application: Application) : BaseViewModel(application)
         execute { appDb.bookSourceDao.update(*bookSource) }
     }
 
-    fun upOrder() {
+    fun upOrder(items: List<BookSource>) {
+        if (items.isEmpty()) return
         execute {
-            val sources = appDb.bookSourceDao.all
-            for ((index: Int, source: BookSource) in sources.withIndex()) {
-                source.customOrder = index + 1
+            val firstSortNumber = items[0].customOrder
+            items.forEachIndexed { index, bookSource ->
+                bookSource.customOrder = firstSortNumber + index
+                appDb.bookSourceDao.update(bookSource)
             }
-            appDb.bookSourceDao.update(*sources.toTypedArray())
         }
     }