format code

example/lib/main.dart

-import 'package:example/preview.dart';
 import 'package:flutter/cupertino.dart';
 import 'package:flutter/material.dart';
 import 'package:photo/photo.dart';
 import 'package:photo_manager/photo_manager.dart';
 
+import './preview.dart';
+
 void main() => runApp(new MyApp());
 
 class MyApp extends StatelessWidget {

example/lib/preview.dart

-import 'package:example/asset_image.dart';
 import 'package:flutter/material.dart';
 import 'package:photo_manager/photo_manager.dart';
 
+import './asset_image.dart';
+
 class PreviewPage extends StatelessWidget {
   final List<AssetEntity> list;
 

lib/src/ui/page/photo_main_page.dart

   void _onGalleryChange(AssetPathEntity assetPathEntity) {
     _currentPath = assetPathEntity;
 
-    _currentPath.assetList.then((v)async {
+    _currentPath.assetList.then((v) async {
       _sortAssetList(v);
       list.clear();
       list.addAll(v);
     // Not deleted
     _onGalleryChange(this.currentPath);
   }
-
 }