优化

app/src/main/java/io/legado/app/ui/book/changesource/ChangeBookSourceDialog.kt

@@ -80,7 +80,7 @@ class ChangeBookSourceDialog() : BaseDialogFragment(R.layout.dialog_book_change_
             val searchGroup = AppConfig.searchGroup
             if (searchGroup.isNotEmpty()) {
                 lifecycleScope.launch {
-                    alert("搜索结果为空") {
+                    context?.alert("搜索结果为空") {
                         setMessage("${searchGroup}分组搜索结果为空,是否切换到全部分组")
                         cancelButton()
                         okButton {
@@ -112,6 +112,11 @@ class ChangeBookSourceDialog() : BaseDialogFragment(R.layout.dialog_book_change_
         viewModel.searchFinishCallback = searchFinishCallback
     }
 
+    override fun onDestroy() {
+        super.onDestroy()
+        viewModel.searchFinishCallback = null
+    }
+
     private fun showTitle() {
         binding.toolBar.title = viewModel.name
         binding.toolBar.subtitle = viewModel.author

app/src/main/java/io/legado/app/ui/book/changesource/ChangeBookSourceViewModel.kt

@@ -31,6 +31,7 @@ import kotlinx.coroutines.Job
 import kotlinx.coroutines.asCoroutineDispatcher
 import kotlinx.coroutines.channels.awaitClose
 import kotlinx.coroutines.coroutineScope
+import kotlinx.coroutines.ensureActive
 import kotlinx.coroutines.flow.callbackFlow
 import kotlinx.coroutines.flow.catch
 import kotlinx.coroutines.flow.collect
@@ -214,6 +215,7 @@ open class ChangeBookSourceViewModel(application: Application) : BaseViewModel(a
                 }
             }.onCompletion {
                 searchStateData.postValue(false)
+                ensureActive()
                 searchFinishCallback?.invoke(searchBooks.isEmpty())
             }.catch {
                 AppLog.put("换源搜索出错\n${it.localizedMessage}", it)

app/src/main/java/io/legado/app/ui/book/changesource/ChangeChapterSourceDialog.kt

@@ -89,7 +89,7 @@ class ChangeChapterSourceDialog() : BaseDialogFragment(R.layout.dialog_chapter_c
             val searchGroup = AppConfig.searchGroup
             if (searchGroup.isNotEmpty()) {
                 lifecycleScope.launch {
-                    alert("搜索结果为空") {
+                    context?.alert("搜索结果为空") {
                         setMessage("${searchGroup}分组搜索结果为空,是否切换到全部分组")
                         noButton()
                         yesButton {
@@ -128,6 +128,11 @@ class ChangeChapterSourceDialog() : BaseDialogFragment(R.layout.dialog_chapter_c
         }
     }
 
+    override fun onDestroy() {
+        super.onDestroy()
+        viewModel.searchFinishCallback = null
+    }
+
     private fun showTitle() {
         binding.toolBar.title = viewModel.chapterTitle
     }