diff --git a/app/src/main/java/io/legado/app/base/adapter/ItemViewDelegate.kt b/app/src/main/java/io/legado/app/base/adapter/ItemViewDelegate.kt
index 2ac1090f2..d5e92e236 100644
--- a/app/src/main/java/io/legado/app/base/adapter/ItemViewDelegate.kt
+++ b/app/src/main/java/io/legado/app/base/adapter/ItemViewDelegate.kt
@@ -9,6 +9,10 @@ import android.content.Context
  */
 abstract class ItemViewDelegate<ITEM>(protected val context: Context, val layoutId: Int) {
 
+    /**
+     * 如果使用了事件回调,回调里不要直接使用item,会出现不更新的问题,
+     * 使用getItem(holder.layoutPosition)来获取item
+     */
     abstract fun convert(holder: ItemViewHolder, item: ITEM, payloads: MutableList<Any>)
 
 }
\ No newline at end of file
diff --git a/app/src/main/java/io/legado/app/base/adapter/SimpleRecyclerAdapter.kt b/app/src/main/java/io/legado/app/base/adapter/SimpleRecyclerAdapter.kt
index c65cfabf4..baf40e487 100644
--- a/app/src/main/java/io/legado/app/base/adapter/SimpleRecyclerAdapter.kt
+++ b/app/src/main/java/io/legado/app/base/adapter/SimpleRecyclerAdapter.kt
@@ -18,5 +18,9 @@ abstract class SimpleRecyclerAdapter<ITEM>(context: Context, private val layoutI
         })
     }
 
+    /**
+     * 如果使用了事件回调,回调里不要直接使用item,会出现不更新的问题,
+     * 使用getItem(holder.layoutPosition)来获取item
+     */
     abstract fun convert(holder: ItemViewHolder, item: ITEM, payloads: MutableList<Any>)
 }
\ No newline at end of file
diff --git a/app/src/main/java/io/legado/app/ui/changesource/ChangeSourceViewModel.kt b/app/src/main/java/io/legado/app/ui/changesource/ChangeSourceViewModel.kt
index 8633021f2..13b145a1e 100644
--- a/app/src/main/java/io/legado/app/ui/changesource/ChangeSourceViewModel.kt
+++ b/app/src/main/java/io/legado/app/ui/changesource/ChangeSourceViewModel.kt
@@ -27,7 +27,7 @@ class ChangeSourceViewModel(application: Application) : BaseViewModel(applicatio
     var author: String = ""
     private var task: Coroutine<*>? = null
     private var screenKey: String = ""
-    private val searchBooks = linkedSetOf<SearchBook>()
+    private val searchBooks = hashSetOf<SearchBook>()
 
     fun initData(arguments: Bundle?) {
         arguments?.let { bundle ->
@@ -50,10 +50,8 @@ class ChangeSourceViewModel(application: Application) : BaseViewModel(applicatio
     }
 
     private fun upAdapter() {
-        execute {
-            val books = searchBooks.toList()
-            searchBooksLiveData.postValue(books.sortedBy { it.originOrder })
-        }
+        val books = searchBooks.toList()
+        searchBooksLiveData.postValue(books.sortedBy { it.originOrder })
     }
 
     private fun searchFinish(searchBook: SearchBook) {