diff --git a/app/src/main/java/io/legado/app/base/BaseDialogFragment.kt b/app/src/main/java/io/legado/app/base/BaseDialogFragment.kt
new file mode 100644
index 000000000..8bb119625
--- /dev/null
+++ b/app/src/main/java/io/legado/app/base/BaseDialogFragment.kt
@@ -0,0 +1,24 @@
+package io.legado.app.base
+
+import android.os.Bundle
+import androidx.fragment.app.DialogFragment
+import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.Job
+import kotlin.coroutines.CoroutineContext
+
+abstract class BaseDialogFragment : DialogFragment(), CoroutineScope {
+    override val coroutineContext: CoroutineContext
+        get() = job + Dispatchers.Main
+    private lateinit var job: Job
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        job = Job()
+    }
+
+    override fun onDestroy() {
+        super.onDestroy()
+        job.cancel()
+    }
+}
\ No newline at end of file
diff --git a/app/src/main/java/io/legado/app/ui/widget/font/FontSelectDialog.kt b/app/src/main/java/io/legado/app/ui/widget/font/FontSelectDialog.kt
index 636aa8a32..8042afbd8 100644
--- a/app/src/main/java/io/legado/app/ui/widget/font/FontSelectDialog.kt
+++ b/app/src/main/java/io/legado/app/ui/widget/font/FontSelectDialog.kt
@@ -12,37 +12,30 @@ import android.view.View
 import android.view.ViewGroup
 import androidx.appcompat.widget.Toolbar
 import androidx.documentfile.provider.DocumentFile
-import androidx.fragment.app.DialogFragment
 import androidx.recyclerview.widget.LinearLayoutManager
 import io.legado.app.App
 import io.legado.app.R
+import io.legado.app.base.BaseDialogFragment
 import io.legado.app.constant.PreferKey
 import io.legado.app.help.permission.Permissions
 import io.legado.app.help.permission.PermissionsCompat
 import io.legado.app.utils.*
 import kotlinx.android.synthetic.main.dialog_font_select.*
-import kotlinx.coroutines.CoroutineScope
 import kotlinx.coroutines.Dispatchers.IO
 import kotlinx.coroutines.Dispatchers.Main
-import kotlinx.coroutines.Job
 import kotlinx.coroutines.launch
 import kotlinx.coroutines.withContext
 import java.io.File
-import kotlin.coroutines.CoroutineContext
 
-class FontSelectDialog : DialogFragment(),
+class FontSelectDialog : BaseDialogFragment(),
     Toolbar.OnMenuItemClickListener,
-    CoroutineScope,
     FontAdapter.CallBack {
-    private lateinit var job: Job
     private val fontFolderRequestCode = 35485
     private val fontFolder =
         App.INSTANCE.filesDir.absolutePath + File.separator + "Fonts" + File.separator
     private val fontCacheFolder by lazy {
         FileUtils.createFolderIfNotExist(App.INSTANCE.cacheDir, "Fonts")
     }
-    override val coroutineContext: CoroutineContext
-        get() = job + Main
     private var adapter: FontAdapter? = null
 
     override fun onStart() {
@@ -57,7 +50,6 @@ class FontSelectDialog : DialogFragment(),
         container: ViewGroup?,
         savedInstanceState: Bundle?
     ): View? {
-        job = Job()
         return inflater.inflate(R.layout.dialog_font_select, container)
     }
 
@@ -101,11 +93,6 @@ class FontSelectDialog : DialogFragment(),
         return true
     }
 
-    override fun onDestroy() {
-        super.onDestroy()
-        job.cancel()
-    }
-
     private fun openFolder() {
         try {
             val intent = Intent(Intent.ACTION_OPEN_DOCUMENT_TREE)
diff --git a/app/src/main/res/layout/dialog_font_select.xml b/app/src/main/res/layout/dialog_font_select.xml
index e4148f763..1e9cf6b42 100644
--- a/app/src/main/res/layout/dialog_font_select.xml
+++ b/app/src/main/res/layout/dialog_font_select.xml
@@ -2,8 +2,7 @@
 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
     android:orientation="vertical"
     android:layout_width="match_parent"
-    android:layout_height="wrap_content"
-    android:padding="16dp">
+    android:layout_height="wrap_content">
 
     <androidx.appcompat.widget.Toolbar
         android:id="@+id/tool_bar"