diff --git a/app/src/main/java/io/legado/app/ui/book/info/BookInfoActivity.kt b/app/src/main/java/io/legado/app/ui/book/info/BookInfoActivity.kt
index b9bb67838..eca15ba9c 100644
--- a/app/src/main/java/io/legado/app/ui/book/info/BookInfoActivity.kt
+++ b/app/src/main/java/io/legado/app/ui/book/info/BookInfoActivity.kt
@@ -32,7 +32,6 @@ class BookInfoActivity : VMBaseActivity<BookInfoViewModel>(R.layout.activity_boo
     override val viewModel: BookInfoViewModel
         get() = getViewModel(BookInfoViewModel::class.java)
 
-    private var changeSourceDialog: ChangeSourceDialog? = null
     private lateinit var adapter: ChapterListAdapter
 
     override fun onActivityCreated(savedInstanceState: Bundle?) {
@@ -49,10 +48,6 @@ class BookInfoActivity : VMBaseActivity<BookInfoViewModel>(R.layout.activity_boo
             }
         } ?: viewModel.loadBook(intent)
         initOnClick()
-        savedInstanceState?.let {
-            changeSourceDialog =
-                supportFragmentManager.findFragmentByTag(ChangeSourceDialog.tag) as? ChangeSourceDialog
-        }
     }
 
     override fun onCompatCreateOptionsMenu(menu: Menu): Boolean {
@@ -194,13 +189,9 @@ class BookInfoActivity : VMBaseActivity<BookInfoViewModel>(R.layout.activity_boo
             }
         }
         tv_change_source.onClick {
-            if (changeSourceDialog == null) {
-                viewModel.bookData.value?.let {
-                    changeSourceDialog = ChangeSourceDialog
-                        .newInstance(it.name, it.author)
-                }
+            viewModel.bookData.value?.let {
+                ChangeSourceDialog.show(supportFragmentManager, it.name, it.author)
             }
-            changeSourceDialog?.show(supportFragmentManager, ChangeSourceDialog.tag)
         }
         tv_current_chapter_info.onClick {
             viewModel.bookData.value?.let {
diff --git a/app/src/main/java/io/legado/app/ui/book/read/ReadBookActivity.kt b/app/src/main/java/io/legado/app/ui/book/read/ReadBookActivity.kt
index 4dc9d14b2..d42299fe5 100644
--- a/app/src/main/java/io/legado/app/ui/book/read/ReadBookActivity.kt
+++ b/app/src/main/java/io/legado/app/ui/book/read/ReadBookActivity.kt
@@ -67,7 +67,6 @@ class ReadBookActivity : VMBaseActivity<ReadBookViewModel>(R.layout.activity_boo
         get() = getViewModel(ReadBookViewModel::class.java)
 
     private val requestCodeEditSource = 111
-    private var changeSourceDialog: ChangeSourceDialog? = null
     private var timeElectricityReceiver: TimeElectricityReceiver? = null
     override var readAloudStatus = Status.STOP
 
@@ -83,10 +82,6 @@ class ReadBookActivity : VMBaseActivity<ReadBookViewModel>(R.layout.activity_boo
         viewModel.bookData.observe(this, Observer { title_bar.title = it.name })
         viewModel.chapterListFinish.observe(this, Observer { loadContent() })
         viewModel.initData(intent)
-        savedInstanceState?.let {
-            changeSourceDialog =
-                supportFragmentManager.findFragmentByTag(ChangeSourceDialog.tag) as? ChangeSourceDialog
-        }
     }
 
     override fun onWindowFocusChanged(hasFocus: Boolean) {
@@ -152,13 +147,9 @@ class ReadBookActivity : VMBaseActivity<ReadBookViewModel>(R.layout.activity_boo
         when (item.itemId) {
             R.id.menu_change_source -> {
                 read_menu.runMenuOut()
-                if (changeSourceDialog == null) {
-                    viewModel.bookData.value?.let {
-                        changeSourceDialog = ChangeSourceDialog
-                            .newInstance(it.name, it.author)
-                    }
+                viewModel.bookData.value?.let {
+                    ChangeSourceDialog.show(supportFragmentManager, it.name, it.author)
                 }
-                changeSourceDialog?.show(supportFragmentManager, ChangeSourceDialog.tag)
             }
             R.id.menu_refresh -> {
                 viewModel.bookData.value?.let {
diff --git a/app/src/main/java/io/legado/app/ui/changesource/ChangeSourceDialog.kt b/app/src/main/java/io/legado/app/ui/changesource/ChangeSourceDialog.kt
index 674db46c1..038311a37 100644
--- a/app/src/main/java/io/legado/app/ui/changesource/ChangeSourceDialog.kt
+++ b/app/src/main/java/io/legado/app/ui/changesource/ChangeSourceDialog.kt
@@ -8,6 +8,7 @@ import android.view.ViewGroup
 import android.widget.LinearLayout
 import androidx.appcompat.widget.SearchView
 import androidx.fragment.app.DialogFragment
+import androidx.fragment.app.FragmentManager
 import androidx.lifecycle.Observer
 import androidx.recyclerview.widget.DividerItemDecoration
 import androidx.recyclerview.widget.LinearLayoutManager
@@ -25,13 +26,15 @@ class ChangeSourceDialog : DialogFragment(),
     companion object {
         const val tag = "changeSourceDialog"
 
-        fun newInstance(name: String, author: String): ChangeSourceDialog {
-            return ChangeSourceDialog().apply {
-                val bundle = Bundle()
-                bundle.putString("name", name)
-                bundle.putString("author", author)
-                arguments = bundle
-            }
+        fun show(manager: FragmentManager, name: String, author: String) {
+            val fragment = (manager.findFragmentByTag(tag) as? ChangeSourceDialog)
+                ?: ChangeSourceDialog().apply {
+                    val bundle = Bundle()
+                    bundle.putString("name", name)
+                    bundle.putString("author", author)
+                    arguments = bundle
+                }
+            fragment.show(manager, tag)
         }
     }
 
diff --git a/app/src/main/java/io/legado/app/ui/filechooser/FileChooserDialog.kt b/app/src/main/java/io/legado/app/ui/filechooser/FileChooserDialog.kt
index 6c1fc6fbd..f3fce06f9 100644
--- a/app/src/main/java/io/legado/app/ui/filechooser/FileChooserDialog.kt
+++ b/app/src/main/java/io/legado/app/ui/filechooser/FileChooserDialog.kt
@@ -1,5 +1,9 @@
 package io.legado.app.ui.filechooser
 
+import android.os.Bundle
+import android.view.LayoutInflater
+import android.view.View
+import android.view.ViewGroup
 import androidx.fragment.app.DialogFragment
 import androidx.fragment.app.FragmentManager
 
@@ -17,4 +21,12 @@ class FileChooserDialog : DialogFragment() {
     }
 
 
+    override fun onCreateView(
+        inflater: LayoutInflater,
+        container: ViewGroup?,
+        savedInstanceState: Bundle?
+    ): View? {
+        return super.onCreateView(inflater, container, savedInstanceState)
+    }
+
 }
\ No newline at end of file