diff --git a/app/src/main/java/io/legado/app/base/BaseDialogFragment.kt b/app/src/main/java/io/legado/app/base/BaseDialogFragment.kt
index fd69e79a0..27e5beaad 100644
--- a/app/src/main/java/io/legado/app/base/BaseDialogFragment.kt
+++ b/app/src/main/java/io/legado/app/base/BaseDialogFragment.kt
@@ -39,6 +39,7 @@ abstract class BaseDialogFragment(
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
         if (Build.VERSION.SDK_INT < Build.VERSION_CODES.N) {
+            //不加这个android 5.0顶部对话框顶部会有空白
             setStyle(STYLE_NO_TITLE, 0)
         }
     }