add lint rules

analysis_options.yaml

@@ -0,0 +1,8 @@
+include: package:flutter_lints/flutter.yaml
+
+linter:
+  rules:
+    avoid_print: false
+    unnecessary_this: false
+    file_names: false
+    constant_identifier_names: false

ios/Runner.xcodeproj/project.pbxproj

@@ -360,7 +360,7 @@
 				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
 				CLANG_ENABLE_MODULES = YES;
 				CURRENT_PROJECT_VERSION = "$(FLUTTER_BUILD_NUMBER)";
-				DEVELOPMENT_TEAM = 5BU82VSTV4;
+				DEVELOPMENT_TEAM = "";
 				ENABLE_BITCODE = NO;
 				INFOPLIST_FILE = Runner/Info.plist;
 				IPHONEOS_DEPLOYMENT_TARGET = 11.0;
@@ -492,7 +492,7 @@
 				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
 				CLANG_ENABLE_MODULES = YES;
 				CURRENT_PROJECT_VERSION = "$(FLUTTER_BUILD_NUMBER)";
-				DEVELOPMENT_TEAM = 5BU82VSTV4;
+				DEVELOPMENT_TEAM = "";
 				ENABLE_BITCODE = NO;
 				INFOPLIST_FILE = Runner/Info.plist;
 				IPHONEOS_DEPLOYMENT_TARGET = 11.0;
@@ -516,7 +516,7 @@
 				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
 				CLANG_ENABLE_MODULES = YES;
 				CURRENT_PROJECT_VERSION = "$(FLUTTER_BUILD_NUMBER)";
-				DEVELOPMENT_TEAM = 5BU82VSTV4;
+				DEVELOPMENT_TEAM = "";
 				ENABLE_BITCODE = NO;
 				INFOPLIST_FILE = Runner/Info.plist;
 				IPHONEOS_DEPLOYMENT_TARGET = 11.0;

lib/basic/Channels.dart

@@ -7,7 +7,7 @@ import 'package:flutter/services.dart';
 // 由于Flutter的EventChannel只能订阅一次, 且为了和golang的的通信, 这里实现了多次订阅的分发和平铺
 // 根据eventName订阅和取消订阅
 
-var _eventChannel = EventChannel("flatEvent");
+var _eventChannel = const EventChannel("flatEvent");
 StreamSubscription? _eventChannelListen;
 
 Map<void Function(String args), String> _eventMap = {};
@@ -28,7 +28,7 @@ void unregisterEvent(void Function(String args) eventHandler) {
     throw 'no register';
   }
   _eventMap.remove(eventHandler);
-  if (_eventMap.length == 0) {
+  if (_eventMap.isEmpty) {
     _eventChannelListen?.cancel();
   }
 }

lib/basic/Common.dart

@@ -19,8 +19,8 @@ void defaultToast(BuildContext context, String title) {
     position: StyledToastPosition.center,
     animation: StyledToastAnimation.scale,
     reverseAnimation: StyledToastAnimation.fade,
-    duration: Duration(seconds: 4),
-    animDuration: Duration(seconds: 1),
+    duration: const Duration(seconds: 4),
+    animDuration: const Duration(seconds: 1),
     curve: Curves.elasticOut,
     reverseCurve: Curves.linear,
   );
@@ -33,22 +33,20 @@ Future<bool> confirmDialog(
           context: context,
           builder: (context) => AlertDialog(
                 title: Text(title),
-                content: new SingleChildScrollView(
-                  child: new ListBody(
-                    children: <Widget>[
-                      new Text(content),
-                    ],
+                content: SingleChildScrollView(
+                  child: ListBody(
+                    children: <Widget>[Text(content)],
                   ),
                 ),
                 actions: <Widget>[
-                  new MaterialButton(
-                    child: new Text('取消'),
+                  MaterialButton(
+                    child: const Text('取消'),
                     onPressed: () {
                       Navigator.of(context).pop(false);
                     },
                   ),
-                  new MaterialButton(
-                    child: new Text('确定'),
+                  MaterialButton(
+                    child: const Text('确定'),
                     onPressed: () {
                       Navigator.of(context).pop(true);
                     },
@@ -61,35 +59,36 @@ Future<bool> confirmDialog(
 /// 显示一个消息提示框
 Future alertDialog(BuildContext context, String title, String content) {
   return showDialog(
-      context: context,
-      builder: (context) => AlertDialog(
-            title: Text(title),
-            content: new SingleChildScrollView(
-              child: new ListBody(
-                children: <Widget>[
-                  new Text(content),
-                ],
-              ),
-            ),
-            actions: <Widget>[
-              new MaterialButton(
-                child: new Text('确定'),
-                onPressed: () {
-                  Navigator.of(context).pop();
-                },
-              ),
-            ],
-          ));
+    context: context,
+    builder: (context) => AlertDialog(
+      title: Text(title),
+      content: SingleChildScrollView(
+        child: ListBody(
+          children: <Widget>[
+            Text(content),
+          ],
+        ),
+      ),
+      actions: <Widget>[
+        MaterialButton(
+          child: const Text('确定'),
+          onPressed: () {
+            Navigator.of(context).pop();
+          },
+        ),
+      ],
+    ),
+  );
 }
 
 /// stream-filter的替代方法
 List<T> filteredList<T>(List<T> list, bool Function(T) filter) {
   List<T> result = [];
-  list.forEach((element) {
+  for (var element in list) {
     if (filter(element)) {
       result.add(element);
     }
-  });
+  }
   return result;
 }
 
@@ -197,7 +196,7 @@ Future<String?> displayTextInputDialog(BuildContext context,
             },
           ),
           MaterialButton(
-            child: Text('确认'),
+            child: const Text('确认'),
             onPressed: () {
               Navigator.of(context).pop(_controller.text);
             },
@@ -258,12 +257,10 @@ Future<String?> inputString(BuildContext context, String title,
             child: ListBody(
               children: [
                 Text(title),
-                Container(
-                  child: TextField(
-                    controller: _textEditController,
-                    decoration: new InputDecoration(
-                      labelText: "$hint",
-                    ),
+                TextField(
+                  controller: _textEditController,
+                  decoration:  InputDecoration(
+                    labelText: hint,
                   ),
                 ),
               ],
@@ -275,13 +272,13 @@ Future<String?> inputString(BuildContext context, String title,
             onPressed: () {
               Navigator.pop(context);
             },
-            child: Text('取消'),
+            child: const Text('取消'),
           ),
           MaterialButton(
             onPressed: () {
               Navigator.pop(context, _textEditController.text);
             },
-            child: Text('确定'),
+            child: const Text('确定'),
           ),
         ],
       );

lib/basic/Method.dart

@@ -13,7 +13,7 @@ class Method {
   Method._();
 
   /// channel
-  MethodChannel _channel = MethodChannel("method");
+  final MethodChannel _channel = const MethodChannel("method");
 
   /// 平铺调用, 为了直接与golang进行通信
   Future<dynamic> _flatInvoke(String method, dynamic params) {

lib/basic/config/AndroidDisplayMode.dart

@@ -29,7 +29,7 @@ Future<void> _chooseAndroidDisplayMode(BuildContext context) async {
     list.addAll(_modes);
     String? result = await chooseListDialog<String>(context, "安卓屏幕刷新率", list);
     if (result != null) {
-      await method.saveProperty(_propertyName, "$result");
+      await method.saveProperty(_propertyName, result);
       _androidDisplayMode = result;
       await _changeMode();
     }

lib/basic/config/DownloadAndExportPath.dart

@@ -2,7 +2,6 @@
 
 import 'dart:io';
 
-import 'package:flutter/cupertino.dart';
 import 'package:flutter/material.dart';
 import 'package:pikapika/basic/Common.dart';
 import 'package:pikapika/basic/Cross.dart';

lib/basic/config/DownloadThreadCount.dart

@@ -1,6 +1,5 @@
 /// 多线程下载并发数
 
-import 'package:flutter/cupertino.dart';
 import 'package:flutter/material.dart';
 import 'package:pikapika/basic/Common.dart';
 import 'package:pikapika/basic/Method.dart';

lib/basic/config/FullScreenUI.dart

@@ -67,6 +67,8 @@ void switchFullScreenUI() {
     case FullScreenUI.ALL:
       list.clear();
       break;
+    case FullScreenUI.NO:
+      break;
   }
   if (Platform.isAndroid || Platform.isIOS) {
     SystemChrome.setEnabledSystemUIOverlays(list);
@@ -78,7 +80,7 @@ Widget fullScreenUISetting() {
     return StatefulBuilder(
       builder: (BuildContext context, void Function(void Function()) setState) {
         return ListTile(
-          title: Text("全屏UI"),
+          title: const Text("全屏UI"),
           subtitle: Text(currentFullScreenUIName()),
           onTap: () async {
             await chooseFullScreenUI(context);

lib/basic/config/GalleryPreloadCount.dart

@@ -1,12 +1,4 @@
 /// 相册模式下预加载图片数量
 
-import 'dart:convert';
-import 'dart:io';
-
-import 'package:flutter/material.dart';
-import 'package:pikapika/basic/Method.dart';
-
-import '../Common.dart';
-
 const galleryPrePreloadCount = 1;
 const galleryPreloadCount = 2;

lib/basic/config/ImageAddress.dart

@@ -1,4 +1,3 @@
-import 'package:flutter/cupertino.dart';
 import 'package:flutter/material.dart';
 
 import '../Method.dart';

lib/basic/config/NoAnimation.dart

@@ -1,5 +1,3 @@
-import 'dart:io';
-
 import 'package:flutter/material.dart';
 
 import '../Common.dart';

lib/basic/config/Proxy.dart

@@ -9,6 +9,7 @@ late String _currentProxy;
 
 Future<String?> initProxy() async {
   _currentProxy = await method.getProxy();
+  return null;
 }
 
 String currentProxyName() {

lib/basic/config/ShadowCategories.dart

@@ -3,7 +3,6 @@
 import 'dart:convert';
 
 import 'package:flutter/material.dart';
-import 'package:multi_select_flutter/dialog/mult_select_dialog.dart';
 import 'package:multi_select_flutter/multi_select_flutter.dart';
 
 import '../Method.dart';
@@ -33,11 +32,11 @@ Future<void> _chooseShadowCategories(BuildContext context) async {
     context: context,
     builder: (ctx) {
       var initialValue = <String>[];
-      shadowCategories.forEach((element) {
+      for (var element in shadowCategories) {
         if (shadowCategories.contains(element)) {
           initialValue.add(element);
         }
-      });
+      }
       return MultiSelectDialog<String>(
         title: Text('封印'),
         searchHint: '搜索',

lib/basic/config/Themes.dart

@@ -380,7 +380,7 @@ Future<dynamic> chooseTheme(BuildContext buildContext) async {
                 )
             ));
             return SimpleDialog(
-              title: Text("选择主题"),
+              title: const Text("选择主题"),
               children: list,
             );
           })

lib/basic/config/TimeOffsetHour.dart

@@ -31,7 +31,7 @@ Future<void> _chooseTimeZone(BuildContext context) async {
       result = result.substring(1);
     }
     _timeOffsetHour = int.parse(result);
-    await method.saveProperty(_propertyName, "$result");
+    await method.saveProperty(_propertyName, result);
   }
 }
 

lib/screens/AboutScreen.dart

@@ -9,6 +9,8 @@ const _releasesUrl = "https://github.com/niuhuan/pikapika/releases";
 
 // 关于
 class AboutScreen extends StatefulWidget {
+  const AboutScreen({Key? key}) : super(key: key);
+
   @override
   State<StatefulWidget> createState() => _AboutScreenState();
 }
@@ -40,11 +42,11 @@ class _AboutScreenState extends State<AboutScreen> {
     var _dirty = dirtyVersion();
     return Scaffold(
       appBar: AppBar(
-        title: Text('关于'),
+        title: const Text('关于'),
       ),
       body: ListView(
         children: [
-          Container(
+          SizedBox(
             width: min / 2,
             height: min / 2,
             child: Center(

lib/screens/AccountScreen.dart

@@ -13,6 +13,8 @@ import 'components/ContentLoading.dart';
 
 // 账户设置
 class AccountScreen extends StatefulWidget {
+  const AccountScreen({Key? key}) : super(key: key);
+
   @override
   _AccountScreenState createState() => _AccountScreenState();
 }

lib/screens/AppScreen.dart

@@ -31,8 +31,8 @@ class _AppScreenState extends State<AppScreen> {
   }
 
   static const List<Widget> _widgetOptions = <Widget>[
-    const CategoriesScreen(),
-    const SpaceScreen(),
+    CategoriesScreen(),
+    SpaceScreen(),
   ];
 
   late int _selectedIndex = 0;

lib/screens/CategoriesScreen.dart

@@ -18,7 +18,7 @@ import 'components/Images.dart';
 
 // 分类
 class CategoriesScreen extends StatefulWidget {
-  const CategoriesScreen();
+  const CategoriesScreen({Key? key}) : super(key: key);
 
   @override
   State<StatefulWidget> createState() => _CategoriesScreenState();
@@ -41,7 +41,7 @@ class _CategoriesScreenState extends State<CategoriesScreen> {
     },
     buildDefaultAppBar: (BuildContext context) {
       return AppBar(
-        title: new Text('分类'),
+        title: Text('分类'),
         actions: [
           shadowCategoriesActionButton(context),
           _searchBar.getSearchAction(context),
@@ -55,11 +55,11 @@ class _CategoriesScreenState extends State<CategoriesScreen> {
   Future<List<Category>> _fetch() async {
     List<Category> categories = await method.categories();
     storedCategories = [];
-    categories.forEach((element) {
+    for (var element in categories) {
       if (!element.isWeb) {
         storedCategories.add(element.title);
       }
-    });
+    }
     return categories;
   }
 
@@ -151,7 +151,7 @@ class _CategoriesScreenState extends State<CategoriesScreen> {
       list.add(
         GestureDetector(
           onTap: onTap,
-          child: Container(
+          child: SizedBox(
             width: blockSize,
             child: Column(
               children: [
@@ -221,7 +221,7 @@ class _CategoriesScreenState extends State<CategoriesScreen> {
       list.add(
         GestureDetector(
           onTap: onTap,
-          child: Container(
+          child: SizedBox(
             width: blockSize,
             child: Column(
               children: [

lib/screens/CleanScreen.dart

@@ -8,6 +8,8 @@ import 'components/ContentLoading.dart';
 
 // 清理
 class CleanScreen extends StatefulWidget {
+  const CleanScreen({Key? key}) : super(key: key);
+
   @override
   State<StatefulWidget> createState() => _CleanScreenState();
 }
@@ -44,15 +46,15 @@ class _CleanScreenState extends State<CleanScreen> {
     }
     return Scaffold(
       appBar: AppBar(
-        title: Text('清理'),
+        title: const Text('清理'),
       ),
       body: ListView(
         children: [
           Container(
-            padding: EdgeInsets.all(8),
+            padding: const EdgeInsets.all(8),
             child: _cleanResult != "" ? Text(_cleanResult) : Container(),
           ),
-          Container(
+          SizedBox(
             height: 50,
             child: FitButton(
               text: '清理网络缓存',
@@ -61,7 +63,7 @@ class _CleanScreenState extends State<CleanScreen> {
               },
             ),
           ),
-          Container(
+          SizedBox(
             height: 50,
             child: FitButton(
               text: '清理图片缓存',
@@ -70,7 +72,7 @@ class _CleanScreenState extends State<CleanScreen> {
               },
             ),
           ),
-          Container(
+          SizedBox(
             height: 50,
             child: FitButton(
               text: '清理全部缓存',

lib/screens/ComicInfoScreen.dart

@@ -151,19 +151,19 @@ class _ComicInfoScreenState extends State<ComicInfoScreen> with RouteAware {
                               onLongPress: () {
                                 confirmCopy(
                                   context,
-                                  "${_comicInfo.creator.name}",
+                                  _comicInfo.creator.name,
                                 );
                               },
                               child: Text(
-                                "${_comicInfo.creator.name}",
-                                style: TextStyle(
+                                _comicInfo.creator.name,
+                                style: const TextStyle(
                                   fontSize: 14,
                                   color: Colors.grey,
                                 ),
                               ),
                             ),
                           ),
-                          TextSpan(
+                          const TextSpan(
                             text: "  ",
                             style: TextStyle(
                               fontSize: 14,
@@ -195,8 +195,8 @@ class _ComicInfoScreenState extends State<ComicInfoScreen> with RouteAware {
                           confirmCopy(context, _comicInfo.chineseTeam);
                         },
                         child: Text(
-                          "${_comicInfo.chineseTeam}",
-                          style: TextStyle(
+                          _comicInfo.chineseTeam,
+                          style: const TextStyle(
                             fontSize: 13,
                             color: Colors.grey,
                           ),
@@ -300,15 +300,13 @@ class _ComicInfoScreenState extends State<ComicInfoScreen> with RouteAware {
               alignment: WrapAlignment.spaceAround,
               children: [
                 ..._epList.map((e) {
-                  return Container(
-                    child: MaterialButton(
-                      onPressed: () {
-                        _push(_comicInfo, _epList, e.order, null);
-                      },
-                      color: Colors.white,
-                      child:
-                          Text(e.title, style: TextStyle(color: Colors.black)),
-                    ),
+                  return MaterialButton(
+                    onPressed: () {
+                      _push(_comicInfo, _epList, e.order, null);
+                    },
+                    color: Colors.white,
+                    child:
+                        Text(e.title, style: TextStyle(color: Colors.black)),
                   );
                 }),
               ],

lib/screens/ComicReaderScreen.dart

@@ -3,7 +3,6 @@ import 'dart:io';
 
 import 'package:flutter/material.dart';
 import 'package:flutter/services.dart';
-import 'package:pikapika/basic/Common.dart';
 import 'package:pikapika/basic/Entities.dart';
 import 'package:pikapika/basic/Method.dart';
 import 'package:pikapika/basic/config/AutoFullScreen.dart';
@@ -76,10 +75,10 @@ class _ComicReaderScreenState extends State<ComicReaderScreen> {
   }
 
   FutureOr<dynamic> _onChangeEp(int epOrder) {
-    var orderMap = Map<int, Ep>();
-    widget.epList.forEach((element) {
+    var orderMap = <int, Ep>{};
+    for (var element in widget.epList) {
       orderMap[element.order] = element;
-    });
+    }
     if (orderMap.containsKey(epOrder)) {
       _replacement = true;
       Navigator.of(context).pushReplacement(
@@ -124,11 +123,11 @@ class _ComicReaderScreenState extends State<ComicReaderScreen> {
   @override
   void initState() {
     // EP
-    widget.epList.forEach((element) {
+    for (var element in widget.epList) {
       if (element.order == widget.currentEpOrder) {
         _ep = element;
       }
-    });
+    }
     // INIT
     _future = _load();
     super.initState();
@@ -177,13 +176,13 @@ class _ComicReaderScreenState extends State<ComicReaderScreen> {
                 : AppBar(
                     title: Text("${_ep.title} - ${widget.comicInfo.title}"),
                   ),
-            body: ContentLoading(label: '加载中'),
+            body: const ContentLoading(label: '加载中'),
           );
         }
-        var epNameMap = Map<int, String>();
-        widget.epList.forEach((element) {
+        var epNameMap = <int, String>{};
+        for (var element in widget.epList) {
           epNameMap[element.order] = element.title;
-        });
+        }
         return Scaffold(
           body: ImageReader(
             ImageReaderStruct(

lib/screens/ComicsScreen.dart

@@ -32,7 +32,7 @@ class ComicsScreen extends StatefulWidget {
 }
 
 class _ComicsScreenState extends State<ComicsScreen> {
-  late SearchBar _categorySearchBar = SearchBar(
+  late final SearchBar _categorySearchBar = SearchBar(
     hintText: '搜索分类 - ${categoryTitle(widget.category)}',
     inBar: false,
     setState: setState,
@@ -49,7 +49,7 @@ class _ComicsScreenState extends State<ComicsScreen> {
     },
     buildDefaultAppBar: (BuildContext context) {
       return AppBar(
-        title: new Text(categoryTitle(widget.category)),
+        title: Text(categoryTitle(widget.category)),
         actions: [
           shadowCategoriesActionButton(context),
           chooseLayoutActionButton(context),

lib/screens/CommentScreen.dart

@@ -28,7 +28,8 @@ class CommentScreen extends StatefulWidget {
   final String mainId;
   final CommentBase comment;
 
-  const CommentScreen(this.mainType, this.mainId, this.comment);
+  const CommentScreen(this.mainType, this.mainId, this.comment, {Key? key})
+      : super(key: key);
 
   @override
   State<StatefulWidget> createState() => _CommentScreenState();

lib/screens/DownloadConfirmScreen.dart

@@ -25,8 +25,8 @@ class DownloadConfirmScreen extends StatefulWidget {
 
 class _DownloadConfirmScreenState extends State<DownloadConfirmScreen> {
   DownloadComic? _task; // 之前的下载任务
-  List<int> _taskedEps = []; // 已经下载的EP
-  List<int> _selectedEps = []; // 选中的EP
+  final List<int> _taskedEps = []; // 已经下载的EP
+  final List<int> _selectedEps = []; // 选中的EP
   late Future f = _load();
 
   Future<dynamic> _load() async {
@@ -41,11 +41,11 @@ class _DownloadConfirmScreenState extends State<DownloadConfirmScreen> {
   void _selectAll() {
     setState(() {
       _selectedEps.clear();
-      widget.epList.forEach((element) {
+      for (var element in widget.epList) {
         if (!_taskedEps.contains(element.order)) {
           _selectedEps.add(element.order);
         }
-      });
+      }
     });
   }
 
@@ -75,7 +75,7 @@ class _DownloadConfirmScreenState extends State<DownloadConfirmScreen> {
     };
     // 下载EP列表
     List<Map<String, dynamic>> list = [];
-    widget.epList.forEach((element) {
+    for (var element in widget.epList) {
       if (_selectedEps.contains(element.order)) {
         list.add({
           "comicId": widget.comicInfo.id,
@@ -85,7 +85,7 @@ class _DownloadConfirmScreenState extends State<DownloadConfirmScreen> {
           "title": element.title,
         });
       }
-    });
+    }
     // 如果之前下载过就将EP加入下载
     // 如果之前没有下载过就创建下载
     if (_task != null) {

lib/screens/DownloadExportToFileScreen.dart

@@ -20,10 +20,11 @@ class DownloadExportToFileScreen extends StatefulWidget {
   final String comicId;
   final String comicTitle;
 
-  DownloadExportToFileScreen({
+  const DownloadExportToFileScreen({
     required this.comicId,
     required this.comicTitle,
-  });
+    Key? key,
+  }) : super(key: key);
 
   @override
   State<StatefulWidget> createState() => _DownloadExportToFileScreenState();
@@ -233,7 +234,7 @@ class _DownloadExportToFileScreenState
             return;
           }
           if (!(await Permission.storage.request()).isGranted) {
-            return null;
+            return;
           }
           try {
             setState(() {

lib/screens/DownloadExportToSocketScreen.dart

@@ -15,11 +15,12 @@ class DownloadExportToSocketScreen extends StatefulWidget {
   final String comicId;
   final String comicTitle;
 
-  DownloadExportToSocketScreen({
+  const DownloadExportToSocketScreen({
     required this.task,
     required this.comicId,
     required this.comicTitle,
-  });
+    Key? key,
+  }) : super(key: key);
 
   @override
   State<StatefulWidget> createState() => _DownloadExportToSocketScreenState();
@@ -28,7 +29,7 @@ class DownloadExportToSocketScreen extends StatefulWidget {
 class _DownloadExportToSocketScreenState
     extends State<DownloadExportToSocketScreen> {
   late Future<int> _future = method.exportComicUsingSocket(widget.comicId);
-  late Future<String> _ipFuture = method.clientIpSet();
+  late final Future<String> _ipFuture = method.clientIpSet();
 
   late String exportMessage = "";
 
@@ -89,16 +90,16 @@ class _DownloadExportToSocketScreenState
                       builder: (BuildContext context,
                           AsyncSnapshot<String> snapshot) {
                         if (snapshot.hasError) {
-                          return Text('获取IP失败');
+                          return const Text('获取IP失败');
                         }
                         if (snapshot.connectionState != ConnectionState.done) {
-                          return Text('正在获取IP');
+                          return const Text('正在获取IP');
                         }
                         return Text('${snapshot.data}');
                       },
                     ),
                     Text('端口号:${snapshot.data}'),
-                    Text('$exportMessage'),
+                    Text(exportMessage),
                   ],
                 ),
               ),

lib/screens/DownloadImportScreen.dart

@@ -1,9 +1,7 @@
-import 'dart:async';
 import 'dart:io';
 
 import 'package:filesystem_picker/filesystem_picker.dart';
 import 'package:flutter/material.dart';
-import 'package:permission_handler/permission_handler.dart';
 import 'package:pikapika/basic/Channels.dart';
 import 'package:pikapika/basic/Common.dart';
 import 'package:pikapika/basic/Method.dart';
@@ -13,6 +11,8 @@ import 'components/ContentLoading.dart';
 
 // 导入
 class DownloadImportScreen extends StatefulWidget {
+  const DownloadImportScreen({Key? key}) : super(key: key);
+
   @override
   State<StatefulWidget> createState() => _DownloadImportScreenState();
 }

lib/screens/DownloadInfoScreen.dart

@@ -19,10 +19,11 @@ class DownloadInfoScreen extends StatefulWidget {
   final String comicId;
   final String comicTitle;
 
-  DownloadInfoScreen({
+  const DownloadInfoScreen({
     required this.comicId,
     required this.comicTitle,
-  });
+    Key? key,
+  }) : super(key: key);
 
   @override
   State<StatefulWidget> createState() => _DownloadInfoScreenState();
@@ -143,15 +144,13 @@ class _DownloadInfoScreenState extends State<DownloadInfoScreen>
                     },
                   ),
                   ..._epList.map((e) {
-                    return Container(
-                      child: MaterialButton(
-                        onPressed: () {
-                          _push(_task, _epList, e.epOrder, null);
-                        },
-                        color: Colors.white,
-                        child: Text(e.title,
-                            style: TextStyle(color: Colors.black)),
-                      ),
+                    return MaterialButton(
+                      onPressed: () {
+                        _push(_task, _epList, e.epOrder, null);
+                      },
+                      color: Colors.white,
+                      child: Text(e.title,
+                          style: const TextStyle(color: Colors.black)),
                     );
                   }),
                 ],

lib/screens/DownloadListScreen.dart

@@ -13,6 +13,8 @@ import 'components/DownloadInfoCard.dart';
 
 // 下载列表
 class DownloadListScreen extends StatefulWidget {
+  const DownloadListScreen({Key? key}) : super(key: key);
+
   @override
   State<StatefulWidget> createState() => _DownloadListScreenState();
 }
@@ -25,15 +27,13 @@ class _DownloadListScreenState extends State<DownloadListScreen> {
   void _onMessageChange(String event) {
     print("EVENT");
     print(event);
-    if (event is String) {
-      try {
-        setState(() {
-          _downloading = DownloadComic.fromJson(json.decode(event));
-        });
-      } catch (e, s) {
-        print(e);
-        print(s);
-      }
+    try {
+      setState(() {
+        _downloading = DownloadComic.fromJson(json.decode(event));
+      });
+    } catch (e, s) {
+      print(e);
+      print(s);
     }
   }
 

lib/screens/DownloadReaderScreen.dart

@@ -76,10 +76,10 @@ class _DownloadReaderScreenState extends State<DownloadReaderScreen> {
   }
 
   FutureOr<dynamic> _onChangeEp(int epOrder) {
-    var orderMap = Map<int, DownloadEp>();
-    widget.epList.forEach((element) {
+    var orderMap = <int, DownloadEp>{};
+    for (var element in widget.epList) {
       orderMap[element.epOrder] = element;
-    });
+    }
     if (orderMap.containsKey(epOrder)) {
       _replacement = true;
       Navigator.of(context).pushReplacement(
@@ -114,11 +114,11 @@ class _DownloadReaderScreenState extends State<DownloadReaderScreen> {
   @override
   void initState() {
     // EP
-    widget.epList.forEach((element) {
+    for (var element in widget.epList) {
       if (element.epOrder == widget.currentEpOrder) {
         _ep = element;
       }
-    });
+    }
     // INIT
     _future = _load();
     super.initState();
@@ -169,10 +169,10 @@ class _DownloadReaderScreenState extends State<DownloadReaderScreen> {
             body: ContentLoading(label: '加载中'),
           );
         }
-        var epNameMap = Map<int, String>();
-        widget.epList.forEach((element) {
+        var epNameMap = <int, String>{};
+        for (var element in widget.epList) {
           epNameMap[element.epOrder] = element.title;
-        });
+        }
         return Scaffold(
           body: ImageReader(
             ImageReaderStruct(

lib/screens/FavouritePaperScreen.dart

@@ -5,6 +5,8 @@ import 'components/ComicPager.dart';
 
 // 收藏的漫画
 class FavouritePaperScreen extends StatefulWidget {
+  const FavouritePaperScreen({Key? key}) : super(key: key);
+
   @override
   State<StatefulWidget> createState() => _FavouritePaperScreen();
 }

lib/screens/FilePhotoViewScreen.dart

@@ -8,7 +8,7 @@ import 'package:pikapika/screens/components/Images.dart';
 class FilePhotoViewScreen extends StatelessWidget {
   final String filePath;
 
-  FilePhotoViewScreen(this.filePath);
+  const FilePhotoViewScreen(this.filePath, {Key? key}) : super(key: key);
 
   @override
   Widget build(BuildContext context) => Scaffold(

lib/screens/GameDownloadScreen.dart

@@ -18,7 +18,7 @@ class GameDownloadScreen extends StatefulWidget {
 
 class _GameDownloadScreenState extends State<GameDownloadScreen> {
   late Future<List<String>> _future =
-      method.downloadGame("${widget.info.androidLinks[0]}");
+      method.downloadGame(widget.info.androidLinks[0]);
 
   @override
   Widget build(BuildContext context) {
@@ -34,21 +34,19 @@ class _GameDownloadScreenState extends State<GameDownloadScreen> {
             onRefresh: () async  {
               setState(() {
                 _future =
-                    method.downloadGame("${widget.info.androidLinks[0]}");
+                    method.downloadGame(widget.info.androidLinks[0]);
               });
             },
             successBuilder:
                 (BuildContext context, AsyncSnapshot<List<String>> snapshot) {
-              return Container(
-                child: Column(
-                  children: [
-                    Container(
-                      padding: EdgeInsets.all(30),
-                      child: Text('获取到下载链接, 您只需要选择其中一个'),
-                    ),
-                    ...snapshot.data!.map((e) => _copyCard(e)),
-                  ],
-                ),
+              return Column(
+                children: [
+                  Container(
+                    padding: const EdgeInsets.all(30),
+                    child: const Text('获取到下载链接, 您只需要选择其中一个'),
+                  ),
+                  ...snapshot.data!.map((e) => _copyCard(e)),
+                ],
               );
             },
           ),

lib/screens/GameInfoScreen.dart

@@ -14,7 +14,7 @@ import 'components/GameTitleCard.dart';
 class GameInfoScreen extends StatefulWidget {
   final String gameId;
 
-  const GameInfoScreen(this.gameId);
+  const GameInfoScreen(this.gameId,{Key? key}):super(key: key);
 
   @override
   State<StatefulWidget> createState() => _GameInfoScreenState();
@@ -127,33 +127,31 @@ class _GameInfoScreenState extends State<GameInfoScreen> {
                       ),
                     ),
                     Container(height: 20),
-                    Container(
-                      child: Column(
-                        children: [
-                          Container(
-                            height: 40,
-                            color: Theme.of(context)
-                                .colorScheme
-                                .secondary
-                                .withOpacity(.025),
-                            child: TabBar(
-                              tabs: <Widget>[
-                                Tab(text: '详情 '),
-                                Tab(text: '评论 (${info.commentsCount})'),
-                              ],
-                              indicatorColor:
-                                  Theme.of(context).colorScheme.secondary,
-                              labelColor:
-                                  Theme.of(context).colorScheme.secondary,
-                              onTap: (val) async {
-                                setState(() {
-                                  _tabIndex = val;
-                                });
-                              },
-                            ),
+                    Column(
+                      children: [
+                        Container(
+                          height: 40,
+                          color: Theme.of(context)
+                              .colorScheme
+                              .secondary
+                              .withOpacity(.025),
+                          child: TabBar(
+                            tabs: <Widget>[
+                              Tab(text: '详情 '),
+                              Tab(text: '评论 (${info.commentsCount})'),
+                            ],
+                            indicatorColor:
+                                Theme.of(context).colorScheme.secondary,
+                            labelColor:
+                                Theme.of(context).colorScheme.secondary,
+                            onTap: (val) async {
+                              setState(() {
+                                _tabIndex = val;
+                              });
+                            },
                           ),
-                        ],
-                      ),
+                        ),
+                      ],
                     ),
                     _tabIndex == 0
                         ? Container(

lib/screens/GamesScreen.dart

@@ -9,6 +9,8 @@ import 'components/Images.dart';
 
 // 游戏列表
 class GamesScreen extends StatefulWidget {
+  const GamesScreen({Key? key}) : super(key: key);
+
   @override
   State<StatefulWidget> createState() => _GamesScreenState();
 }
@@ -43,7 +45,7 @@ class _GamesScreenState extends State<GamesScreen> {
 
           List<Wrap> wraps = [];
           GameCard? gameCard;
-          page.docs.forEach((element) {
+          for (var element in page.docs) {
             if (gameCard == null) {
               gameCard = GameCard(element);
             } else {
@@ -53,7 +55,7 @@ class _GamesScreenState extends State<GamesScreen> {
               ));
               gameCard = null;
             }
-          });
+          }
           if (gameCard != null) {
             wraps.add(Wrap(
               children: [gameCard!],
@@ -85,18 +87,16 @@ class _GamesScreenState extends State<GamesScreen> {
                           builder: (context) {
                             return AlertDialog(
                               content: Card(
-                                child: Container(
-                                  child: TextField(
-                                    controller: _textEditController,
-                                    decoration: new InputDecoration(
-                                      labelText: "请输入页数：",
-                                    ),
-                                    keyboardType: TextInputType.number,
-                                    inputFormatters: <TextInputFormatter>[
-                                      FilteringTextInputFormatter.allow(
-                                          RegExp(r'\d+')),
-                                    ],
+                                child: TextField(
+                                  controller: _textEditController,
+                                  decoration: const InputDecoration(
+                                    labelText: "请输入页数：",
                                   ),
+                                  keyboardType: TextInputType.number,
+                                  inputFormatters: <TextInputFormatter>[
+                                    FilteringTextInputFormatter.allow(
+                                        RegExp(r'\d+')),
+                                  ],
                                 ),
                               ),
                               actions: <Widget>[
@@ -104,13 +104,13 @@ class _GamesScreenState extends State<GamesScreen> {
                                   onPressed: () {
                                     Navigator.pop(context);
                                   },
-                                  child: Text('取消'),
+                                  child: const Text('取消'),
                                 ),
                                 MaterialButton(
                                   onPressed: () {
                                     Navigator.pop(context);
                                     var text = _textEditController.text;
-                                    if (text.length == 0 || text.length > 5) {
+                                    if (text.isEmpty || text.length > 5) {
                                       return;
                                     }
                                     var num = int.parse(text);
@@ -119,7 +119,7 @@ class _GamesScreenState extends State<GamesScreen> {
                                     }
                                     _onPageChange(num);
                                   },
-                                  child: Text('确定'),
+                                  child: const Text('确定'),
                                 ),
                               ],
                             );
@@ -186,7 +186,7 @@ class _GamesScreenState extends State<GamesScreen> {
 class GameCard extends StatelessWidget {
   final GameSimple info;
 
-  GameCard(this.info);
+  const GameCard(this.info, {Key? key}) : super(key: key);
 
   @override
   Widget build(BuildContext context) {
@@ -215,8 +215,8 @@ class GameCard extends StatelessWidget {
               );
             },
             child: Container(
-              padding: EdgeInsets.all(10),
-              child: Container(
+              padding: const EdgeInsets.all(10),
+              child: SizedBox(
                 width: imageWidth,
                 child: Column(
                   children: [

lib/screens/InitScreen.dart

@@ -36,6 +36,8 @@ import 'AppScreen.dart';
 
 // 初始化界面
 class InitScreen extends StatefulWidget {
+  const InitScreen({Key? key}) : super(key: key);
+
   @override
   State<StatefulWidget> createState() => _InitScreenState();
 }
@@ -104,7 +106,7 @@ class _InitScreenState extends State<InitScreen> {
       backgroundColor: Color(0xfffffced),
       body: ConstrainedBox(
         constraints: BoxConstraints.expand(),
-        child: new Image.asset(
+        child: Image.asset(
           "lib/assets/init.jpg",
           fit: BoxFit.contain,
         ),

lib/screens/MigrateScreen.dart

@@ -8,12 +8,14 @@ import 'package:pikapika/screens/components/ContentLoading.dart';
 
 // 数据迁移页面
 class MigrateScreen extends StatefulWidget {
+  const MigrateScreen({Key? key}) : super(key: key);
+
   @override
   State<StatefulWidget> createState() => _MigrateScreenState();
 }
 
 class _MigrateScreenState extends State<MigrateScreen> {
-  late Future _future = _load();
+  late final Future _future = _load();
   late String _current;
   late List<String> paths;
   String _message = "";

lib/screens/RegisterScreen.dart

@@ -89,14 +89,14 @@ class _RegisterScreenState extends State<RegisterScreen> {
     if (_registerOver) {
       return Scaffold(
         appBar: AppBar(
-          title: Text('注册成功'),
+          title: const Text('注册成功'),
         ),
         body: Center(
           child: Container(
             child: Column(
               children: [
                 Expanded(child: Container()),
-                Text('您已经注册成功, 请返回登录'),
+                const Text('您已经注册成功, 请返回登录'),
                 Text('账号 : $_email'),
                 Text('昵称 : $_name'),
                 Expanded(child: Container()),

lib/screens/SearchScreen.dart

@@ -24,9 +24,9 @@ class SearchScreen extends StatefulWidget {
 }
 
 class _SearchScreenState extends State<SearchScreen> {
-  late TextEditingController _textEditController =
+  late final TextEditingController _textEditController =
       TextEditingController(text: widget.keyword);
-  late SearchBar _searchBar = SearchBar(
+  late final SearchBar _searchBar = SearchBar(
     hintText: '搜索 ${categoryTitle(widget.category)}',
     controller: _textEditController,
     inBar: false,

lib/screens/SettingsScreen.dart

@@ -34,12 +34,14 @@ import 'MigrateScreen.dart';
 import 'ModifyPasswordScreen.dart';
 
 class SettingsScreen extends StatelessWidget {
+  const SettingsScreen({Key? key}) : super(key: key);
+
   @override
   Widget build(BuildContext context) => Scaffold(
-        appBar: AppBar(title: Text('设置')),
+        appBar: AppBar(title: const Text('设置')),
         body: ListView(
           children: [
-            Divider(),
+            const Divider(),
             ListTile(
               onTap: () async {
                 Navigator.push(
@@ -48,11 +50,11 @@ class SettingsScreen extends StatelessWidget {
                       builder: (context) => ModifyPasswordScreen()),
                 );
               },
-              title: Text('修改密码'),
+              title: const Text('修改密码'),
             ),
-            Divider(),
-            NetworkSetting(),
-            Divider(),
+            const Divider(),
+            const NetworkSetting(),
+            const Divider(),
             qualitySetting(),
             convertToPNGSetting(),
             readerTypeSetting(),
@@ -63,7 +65,7 @@ class SettingsScreen extends StatelessWidget {
             volumeControllerSetting(),
             keyboardControllerSetting(),
             noAnimationSetting(),
-            Divider(),
+            const Divider(),
             shadowCategoriesModeSetting(),
             shadowCategoriesSetting(),
             pagerActionSetting(),

lib/screens/SpaceScreen.dart

@@ -15,7 +15,8 @@ import 'components/UserProfileCard.dart';
 
 // 个人空间页面
 class SpaceScreen extends StatefulWidget {
-  const SpaceScreen();
+  const SpaceScreen({Key? key}) : super(key: key);
+
 
   @override
   State<StatefulWidget> createState() => _SpaceScreenState();
@@ -58,17 +59,17 @@ class _SpaceScreenState extends State<SpaceScreen> {
                 );
               }
             },
-            icon: Icon(Icons.exit_to_app),
+            icon: const Icon(Icons.exit_to_app),
           ),
           IconButton(
             onPressed: () {
               Navigator.push(
                 context,
-                MaterialPageRoute(builder: (context) => AboutScreen()),
+                MaterialPageRoute(builder: (context) => const AboutScreen()),
               );
             },
             icon: Badged(
-              child: Icon(Icons.info_outline),
+              child: const Icon(Icons.info_outline),
               badge: latestVersion() == null ? null : "1",
             ),
           ),
@@ -76,18 +77,18 @@ class _SpaceScreenState extends State<SpaceScreen> {
             onPressed: () {
               Navigator.push(
                 context,
-                MaterialPageRoute(builder: (context) => SettingsScreen()),
+                MaterialPageRoute(builder: (context) => const SettingsScreen()),
               );
             },
-            icon: Icon(Icons.settings),
+            icon: const Icon(Icons.settings),
           ),
         ],
       ),
       body: ListView(
         children: [
-          Divider(),
-          UserProfileCard(),
-          Divider(),
+          const Divider(),
+          const UserProfileCard(),
+          const Divider(),
           ListTile(
             onTap: () async {
               await chooseTheme(context);
@@ -96,7 +97,7 @@ class _SpaceScreenState extends State<SpaceScreen> {
             title: Text('主题'),
             subtitle: Text(currentThemeName()),
           ),
-          Divider(),
+          const Divider(),
           ListTile(
             onTap: () {
               Navigator.push(
@@ -106,7 +107,7 @@ class _SpaceScreenState extends State<SpaceScreen> {
             },
             title: Text('我的收藏'),
           ),
-          Divider(),
+          const Divider(),
           ListTile(
             onTap: () {
               Navigator.push(
@@ -116,17 +117,17 @@ class _SpaceScreenState extends State<SpaceScreen> {
             },
             title: Text('浏览记录'),
           ),
-          Divider(),
+          const Divider(),
           ListTile(
             onTap: () {
               Navigator.push(
                 context,
-                MaterialPageRoute(builder: (context) => DownloadListScreen()),
+                MaterialPageRoute(builder: (context) => const DownloadListScreen()),
               );
             },
-            title: Text('我的下载'),
+            title: const Text('我的下载'),
           ),
-          Divider(),
+          const Divider(),
         ],
       ),
     );

lib/screens/ViewLogsScreen.dart

@@ -7,7 +7,7 @@ import 'components/Images.dart';
 
 // 浏览记录
 class ViewLogsScreen extends StatefulWidget {
-  const ViewLogsScreen();
+  const ViewLogsScreen({Key? key}) : super(key: key);
 
   @override
   State<StatefulWidget> createState() => _ViewLogsScreenState();
@@ -175,7 +175,7 @@ class ViewLogWrap extends StatelessWidget {
           onDelete(e.id);
         },
         child: Card(
-          child: Container(
+          child: SizedBox(
             width: width,
             child: Column(
               children: [
@@ -200,7 +200,7 @@ class ViewLogWrap extends StatelessWidget {
       );
     });
 
-    Map<int, List<Widget>> map = Map();
+    Map<int, List<Widget>> map = {};
     for (var i = 0; i < entries.length; i++) {
       late List<Widget> list;
       if (i % 4 == 0) {

lib/screens/components/Avatar.dart

@@ -10,7 +10,7 @@ class Avatar extends StatelessWidget {
   final RemoteImageInfo avatarImage;
   final double size;
 
-  const Avatar(this.avatarImage, {this.size = 50});
+  const Avatar(this.avatarImage, {this.size = 50, Key? key}) : super(key: key);
 
   @override
   Widget build(BuildContext context) {

lib/screens/components/Badge.dart

@@ -15,21 +15,21 @@ class Badged extends StatelessWidget {
     return Stack(
       children: [
         child,
-        new Positioned(
+        Positioned(
           right: 0,
-          child: new Container(
-            padding: EdgeInsets.all(1),
-            decoration: new BoxDecoration(
+          child: Container(
+            padding: const EdgeInsets.all(1),
+            decoration: BoxDecoration(
               color: Colors.red,
               borderRadius: BorderRadius.circular(6),
             ),
-            constraints: BoxConstraints(
+            constraints: const BoxConstraints(
               minWidth: 12,
               minHeight: 12,
             ),
-            child: new Text(
+            child: Text(
               badge!,
-              style: new TextStyle(
+              style: const TextStyle(
                 color: Colors.white,
                 fontSize: 8,
               ),

lib/screens/components/ComicDescriptionCard.dart

@@ -4,13 +4,14 @@ import 'package:flutter/material.dart';
 class ComicDescriptionCard extends StatelessWidget {
   final String description;
 
-  ComicDescriptionCard({Key? key, required this.description}) : super(key: key);
+  const ComicDescriptionCard({Key? key, required this.description})
+      : super(key: key);
 
   @override
   Widget build(BuildContext context) {
     var theme = Theme.of(context);
     return Container(
-      padding: EdgeInsets.only(
+      padding: const EdgeInsets.only(
         top: 5,
         bottom: 5,
         left: 10,

lib/screens/components/ComicInfoCard.dart

@@ -168,7 +168,7 @@ class _ComicInfoCard extends State<ComicInfoCard> {
                     ],
                   ),
                 ),
-                Container(
+                SizedBox(
                   height: imageHeight,
                   child: Column(
                     mainAxisAlignment: MainAxisAlignment.start,
@@ -180,7 +180,7 @@ class _ComicInfoCard extends State<ComicInfoCard> {
                           ? []
                           : [
                               Container(height: 10),
-                              Container(
+                              SizedBox(
                                 height: 26,
                                 child: _likeLoading
                                     ? IconButton(
@@ -205,7 +205,7 @@ class _ComicInfoCard extends State<ComicInfoCard> {
                           ? []
                           : [
                               Container(height: 10),
-                              Container(
+                              SizedBox(
                                 height: 26,
                                 child: _favouriteLoading
                                     ? IconButton(

lib/screens/components/ComicList.dart

@@ -18,7 +18,9 @@ class ComicList extends StatefulWidget {
   final List<ComicSimple> comicList;
   final ScrollController? controller;
 
-  const ComicList(this.comicList, {this.appendWidget, this.controller});
+  const ComicList(this.comicList,
+      {this.appendWidget, this.controller, Key? key})
+      : super(key: key);
 
   @override
   State<StatefulWidget> createState() => _ComicListState();
@@ -112,7 +114,7 @@ class _ComicListState extends State<ComicList> {
         }).toList(),
         ...widget.appendWidget != null
             ? [
-                Container(
+                SizedBox(
                   height: 80,
                   child: widget.appendWidget,
                 ),
@@ -132,7 +134,7 @@ class _ComicListState extends State<ComicList> {
     var height = width * coverHeight / coverWidth;
     List<Widget> wraps = [];
     List<Widget> tmp = [];
-    widget.comicList.forEach((e) {
+    for (var e in widget.comicList) {
       var shadow = e.categories.map(
         (c) {
           switch (currentShadowCategoriesMode()) {
@@ -193,12 +195,13 @@ class _ComicListState extends State<ComicList> {
         ));
         tmp = [];
       }
-    });
+    }
     // 追加特殊按钮
     if (widget.appendWidget != null) {
       tmp.add(Container(
-        color: (Theme.of(context).textTheme.bodyText1?.color ?? Color(0))
-            .withOpacity(.1),
+        color:
+            (Theme.of(context).textTheme.bodyText1?.color ?? Colors.transparent)
+                .withOpacity(.1),
         margin: EdgeInsets.only(
           left: (rowCap - tmp.length) * gap,
           right: (rowCap - tmp.length) * gap,
@@ -211,7 +214,7 @@ class _ComicListState extends State<ComicList> {
       ));
     }
     // 最后一页没有下一页所有有可能为空
-    if (tmp.length > 0) {
+    if (tmp.isNotEmpty) {
       wraps.add(Row(
         crossAxisAlignment: CrossAxisAlignment.start,
         mainAxisAlignment: MainAxisAlignment.spaceAround,
@@ -240,7 +243,7 @@ class _ComicListState extends State<ComicList> {
     double shadowFontSize = max(width / 9, 12);
     List<Widget> wraps = [];
     List<Widget> tmp = [];
-    widget.comicList.forEach((e) {
+    for (var e in widget.comicList) {
       var shadow = e.categories.map(
         (c) {
           switch (currentShadowCategoriesMode()) {
@@ -330,12 +333,13 @@ class _ComicListState extends State<ComicList> {
         ));
         tmp = [];
       }
-    });
+    }
     // 追加特殊按钮
     if (widget.appendWidget != null) {
       tmp.add(Container(
-        color: (Theme.of(context).textTheme.bodyText1?.color ?? Color(0))
-            .withOpacity(.1),
+        color:
+            (Theme.of(context).textTheme.bodyText1?.color ?? Colors.transparent)
+                .withOpacity(.1),
         margin: EdgeInsets.only(
           left: (rowCap - tmp.length) * gap,
           right: (rowCap - tmp.length) * gap,
@@ -348,7 +352,7 @@ class _ComicListState extends State<ComicList> {
       ));
     }
     // 最后一页没有下一页所有有可能为空
-    if (tmp.length > 0) {
+    if (tmp.isNotEmpty) {
       wraps.add(Row(
         crossAxisAlignment: CrossAxisAlignment.start,
         mainAxisAlignment: MainAxisAlignment.spaceAround,

lib/screens/components/ComicListBuilder.dart

@@ -10,7 +10,8 @@ class ComicListBuilder extends StatefulWidget {
   final Future<List<ComicSimple>> future;
   final Future Function() reload;
 
-  ComicListBuilder(this.future, this.reload);
+  const ComicListBuilder(this.future, this.reload, {Key? key})
+      : super(key: key);
 
   @override
   State<StatefulWidget> createState() => _ComicListBuilderState();

lib/screens/components/ComicPager.dart

@@ -153,17 +153,15 @@ class _ControllerComicPagerState extends State<ControllerComicPager> {
                   builder: (context) {
                     return AlertDialog(
                       content: Card(
-                        child: Container(
-                          child: TextField(
-                            controller: _textEditController,
-                            decoration: new InputDecoration(
-                              labelText: "请输入页数：",
-                            ),
-                            keyboardType: TextInputType.number,
-                            inputFormatters: <TextInputFormatter>[
-                              FilteringTextInputFormatter.allow(RegExp(r'\d+')),
-                            ],
+                        child: TextField(
+                          controller: _textEditController,
+                          decoration: const InputDecoration(
+                            labelText: "请输入页数：",
                           ),
+                          keyboardType: TextInputType.number,
+                          inputFormatters: <TextInputFormatter>[
+                            FilteringTextInputFormatter.allow(RegExp(r'\d+')),
+                          ],
                         ),
                       ),
                       actions: <Widget>[
@@ -177,7 +175,7 @@ class _ControllerComicPagerState extends State<ControllerComicPager> {
                           onPressed: () {
                             Navigator.pop(context);
                             var text = _textEditController.text;
-                            if (text.length == 0 || text.length > 5) {
+                            if (text.isEmpty || text.length > 5) {
                               return;
                             }
                             var num = int.parse(text);
@@ -240,6 +238,7 @@ class _ControllerComicPagerState extends State<ControllerComicPager> {
         text: '下一页',
       );
     }
+    return null;
   }
 }
 
@@ -391,5 +390,6 @@ class _StreamComicPagerState extends State<StreamComicPager> {
     if (_loading) {
       return FitButton(onPressed: () {}, text: '加载中');
     }
+    return null;
   }
 }

lib/screens/components/CommentItem.dart

@@ -11,7 +11,8 @@ class ComicCommentItem extends StatefulWidget {
   final String mainId;
   final CommentBase comment;
 
-  const ComicCommentItem(this.mainType, this.mainId, this.comment);
+  const ComicCommentItem(this.mainType, this.mainId, this.comment, {Key? key})
+      : super(key: key);
 
   @override
   State<StatefulWidget> createState() => _ComicCommentItemState();
@@ -24,7 +25,7 @@ class _ComicCommentItemState extends State<ComicCommentItem> {
   Widget build(BuildContext context) {
     var comment = widget.comment;
     var theme = Theme.of(context);
-    var nameStyle = TextStyle(fontWeight: FontWeight.bold);
+    var nameStyle = const TextStyle(fontWeight: FontWeight.bold);
     var levelStyle = TextStyle(
         fontSize: 12, color: theme.colorScheme.secondary.withOpacity(.8));
     var connectStyle =
@@ -32,7 +33,7 @@ class _ComicCommentItemState extends State<ComicCommentItem> {
     var datetimeStyle = TextStyle(
         color: theme.textTheme.bodyText1?.color?.withOpacity(.6), fontSize: 12);
     return Container(
-      padding: EdgeInsets.all(5),
+      padding: const EdgeInsets.all(5),
       decoration: BoxDecoration(
         border: Border(
           top: BorderSide(
@@ -58,7 +59,7 @@ class _ComicCommentItemState extends State<ComicCommentItem> {
               children: [
                 LayoutBuilder(
                   builder: (BuildContext context, BoxConstraints constraints) {
-                    return Container(
+                    return SizedBox(
                       width: constraints.maxWidth,
                       child: Wrap(
                         crossAxisAlignment: WrapCrossAlignment.center,
@@ -77,7 +78,7 @@ class _ComicCommentItemState extends State<ComicCommentItem> {
                 Container(height: 3),
                 LayoutBuilder(
                   builder: (BuildContext context, BoxConstraints constraints) {
-                    return Container(
+                    return SizedBox(
                       width: constraints.maxWidth,
                       child: Wrap(
                         crossAxisAlignment: WrapCrossAlignment.center,
@@ -103,7 +104,7 @@ class _ComicCommentItemState extends State<ComicCommentItem> {
                                         text: '${comment.commentsCount}',
                                       ),
                                     ])
-                                  : TextSpan(),
+                                  : const TextSpan(),
                               WidgetSpan(child: Container(width: 12)),
                               WidgetSpan(
                                   child: GestureDetector(
@@ -136,6 +137,7 @@ class _ComicCommentItemState extends State<ComicCommentItem> {
                                       }
                                     });
                                   } catch (e, s) {
+                                    print("$e\n$s");
                                     defaultToast(context, "点赞失败");
                                   } finally {
                                     setState(() {

lib/screens/components/ContentError.dart

@@ -1,6 +1,5 @@
 import 'package:flutter/material.dart';
 import 'package:pikapika/basic/config/ContentFailedReloadAction.dart';
-import 'dart:ui';
 
 import 'package:pikapika/basic/enum/ErrorTypes.dart';
 
@@ -60,21 +59,19 @@ class ContentError extends StatelessWidget {
             onTap: onRefresh,
             child: ListView(
               children: [
-                Container(
+                SizedBox(
                   height: height,
                   child: Column(
                     children: [
                       Expanded(child: Container()),
-                      Container(
-                        child: Icon(
-                          iconData,
-                          size: iconSize,
-                          color: Colors.grey.shade600,
-                        ),
+                      Icon(
+                        iconData,
+                        size: iconSize,
+                        color: Colors.grey.shade600,
                       ),
                       Container(height: min / 10),
                       Container(
-                        padding: EdgeInsets.only(
+                        padding: const EdgeInsets.only(
                           left: 30,
                           right: 30,
                         ),
@@ -99,21 +96,19 @@ class ContentError extends StatelessWidget {
           onRefresh: onRefresh,
           child: ListView(
             children: [
-              Container(
+              SizedBox(
                 height: height,
                 child: Column(
                   children: [
                     Expanded(child: Container()),
-                    Container(
-                      child: Icon(
-                        iconData,
-                        size: iconSize,
-                        color: Colors.grey.shade600,
-                      ),
+                    Icon(
+                      iconData,
+                      size: iconSize,
+                      color: Colors.grey.shade600,
                     ),
                     Container(height: min / 10),
                     Container(
-                      padding: EdgeInsets.only(
+                      padding: const EdgeInsets.only(
                         left: 30,
                         right: 30,
                       ),

lib/screens/components/DownloadInfoCard.dart

@@ -115,53 +115,43 @@ class DownloadInfoCard extends StatelessWidget {
                           ),
                           Container(width: 20),
                           task.deleting
-                              ? Container(
-                                  child: Text('删除中',
+                              ? Text('删除中',
+                                  style: TextStyle(
+                                      color: Color.alphaBlend(
+                                          textColor.withAlpha(0x33),
+                                          Colors.red.shade500)))
+                              : task.downloadFailed
+                                  ? Text('下载失败',
                                       style: TextStyle(
                                           color: Color.alphaBlend(
                                               textColor.withAlpha(0x33),
-                                              Colors.red.shade500))),
-                                )
-                              : task.downloadFailed
-                                  ? Container(
-                                      child: Text('下载失败',
+                                              Colors.red.shade500)))
+                                  : task.downloadFinished
+                                      ? Text('下载完成',
                                           style: TextStyle(
                                               color: Color.alphaBlend(
-                                                  textColor.withAlpha(0x33),
-                                                  Colors.red.shade500))),
-                                    )
-                                  : task.downloadFinished
-                                      ? Container(
-                                          child: Text('下载完成',
+                                                  textColorAlpha,
+                                                  Colors.green.shade500)))
+                                      : downloading // downloader.downloadingTask() == task.id
+                                          ? Text('下载中',
                                               style: TextStyle(
                                                   color: Color.alphaBlend(
                                                       textColorAlpha,
-                                                      Colors.green.shade500))),
-                                        )
-                                      : downloading // downloader.downloadingTask() == task.id
-                                          ? Container(
-                                              child: Text('下载中',
-                                                  style: TextStyle(
-                                                      color: Color.alphaBlend(
-                                                          textColorAlpha,
-                                                          Colors
-                                                              .blue.shade500))),
-                                            )
-                                          : Container(
-                                              child: Text('队列中',
-                                                  style: TextStyle(
-                                                      color: Color.alphaBlend(
-                                                          textColorAlpha,
-                                                          Colors.lightBlue
-                                                              .shade500))),
-                                            ),
+                                                      Colors
+                                                          .blue.shade500)))
+                                          : Text('队列中',
+                                              style: TextStyle(
+                                                  color: Color.alphaBlend(
+                                                      textColorAlpha,
+                                                      Colors.lightBlue
+                                                          .shade500))),
                         ],
                       ),
                     ],
                   ),
                 ),
                 Container(
-                  padding: EdgeInsets.only(left: 8),
+                  padding: const EdgeInsets.only(left: 8),
                   height: imageHeight,
                   child: Column(
                     mainAxisAlignment: MainAxisAlignment.start,

lib/screens/components/FitButton.dart

@@ -15,13 +15,11 @@ class FitButton extends StatelessWidget {
           width: constraints.maxWidth,
           height: constraints.maxHeight,
           child: Container(
-            padding: EdgeInsets.all(10),
+            padding: const EdgeInsets.all(10),
             child: MaterialButton(
               onPressed: onPressed,
-              child: Container(
-                child: Center(
-                  child: Text(text),
-                ),
+              child: Center(
+                child: Text(text),
               ),
             ),
           ),

lib/screens/components/GameTitleCard.dart

@@ -9,21 +9,20 @@ import 'Images.dart';
 class GameTitleCard extends StatelessWidget {
   final GameInfo info;
 
-  const GameTitleCard(this.info);
+  const GameTitleCard(this.info, {Key? key}) : super(key: key);
 
   @override
   Widget build(BuildContext context) {
     double iconMargin = 20;
     double iconSize = 60;
-    BorderRadius iconRadius = BorderRadius.all(Radius.circular(6));
-    TextStyle titleStyle = TextStyle(fontSize: 16, fontWeight: FontWeight.bold);
+    BorderRadius iconRadius = const BorderRadius.all(Radius.circular(6));
+    TextStyle titleStyle =
+        const TextStyle(fontSize: 16, fontWeight: FontWeight.bold);
     TextStyle publisherStyle = TextStyle(
       color: Theme.of(context).colorScheme.secondary,
       fontSize: 12.5,
     );
-    TextStyle versionStyle = TextStyle(
-      fontSize: 12.5,
-    );
+    TextStyle versionStyle = const TextStyle(fontSize: 12.5);
     double platformMargin = 10;
     double platformSize = 25;
     return Row(

lib/screens/components/ImageReader.dart

@@ -139,7 +139,7 @@ class ImageReaderStruct {
 class ImageReader extends StatefulWidget {
   final ImageReaderStruct struct;
 
-  const ImageReader(this.struct);
+  const ImageReader(this.struct, {Key? key}) : super(key: key);
 
   @override
   State<StatefulWidget> createState() => _ImageReaderState();
@@ -153,9 +153,9 @@ class _ImageReaderState extends State<ImageReader> {
   final ReaderType _pagerType = currentReaderType();
 
   // 记录了控制器
-  late FullScreenAction _fullScreenAction = currentFullScreenAction();
+  late final FullScreenAction _fullScreenAction = currentFullScreenAction();
 
-  late ReaderSliderPosition _readerSliderPosition =
+  late final ReaderSliderPosition _readerSliderPosition =
       currentReaderSliderPosition();
 
   @override
@@ -245,7 +245,7 @@ abstract class _ImageReaderContentState extends State<_ImageReaderContent> {
   void _onPageControl(_ReaderControllerEventArgs? args) {
     if (args != null) {
       var event = args.key;
-      switch ("$event") {
+      switch (event) {
         case "UP":
           if (_current > 0) {
             _needJumpTo(_current - 1, true);
@@ -369,7 +369,6 @@ abstract class _ImageReaderContentState extends State<_ImageReaderContent> {
           ],
         );
     }
-    return Container();
   }
 
   Widget _buildAppBar() => widget.struct.fullScreen
@@ -393,7 +392,7 @@ abstract class _ImageReaderContentState extends State<_ImageReaderContent> {
     return Column(
       children: [
         Expanded(child: Container()),
-        Container(
+        SizedBox(
           height: 25,
           child: _buildSliderWidget(Axis.horizontal),
         ),
@@ -407,7 +406,7 @@ abstract class _ImageReaderContentState extends State<_ImageReaderContent> {
       : Align(
           alignment: Alignment.centerLeft,
           child: Material(
-            color: Color(0x0),
+            color: Colors.transparent,
             child: Container(
               width: 35,
               height: 300,
@@ -431,7 +430,7 @@ abstract class _ImageReaderContentState extends State<_ImageReaderContent> {
       : Align(
           alignment: Alignment.centerRight,
           child: Material(
-            color: Color(0x0),
+            color: Colors.transparent,
             child: Container(
               width: 35,
               height: 300,
@@ -525,7 +524,7 @@ abstract class _ImageReaderContentState extends State<_ImageReaderContent> {
     return Align(
       alignment: Alignment.bottomLeft,
       child: Material(
-        color: Color(0x0),
+        color: Colors.transparent,
         child: Container(
           padding: EdgeInsets.only(left: 10, right: 10, top: 4, bottom: 4),
           margin: EdgeInsets.only(bottom: 10),
@@ -577,8 +576,7 @@ abstract class _ImageReaderContentState extends State<_ImageReaderContent> {
     return GestureDetector(
       behavior: HitTestBehavior.translucent,
       onTap: () {
-        _readerControllerEvent
-            .broadcast(_ReaderControllerEventArgs("DOWN"));
+        _readerControllerEvent.broadcast(_ReaderControllerEventArgs("DOWN"));
       },
       onDoubleTap: () {
         widget.struct.onFullScreenChange(!widget.struct.fullScreen);
@@ -656,7 +654,7 @@ abstract class _ImageReaderContentState extends State<_ImageReaderContent> {
       context: context,
       backgroundColor: Color(0xAA000000),
       builder: (context) {
-        return Container(
+        return SizedBox(
           height: MediaQuery.of(context).size.height * (.45),
           child: _EpChooser(
             widget.struct.epNameMap,
@@ -677,7 +675,7 @@ abstract class _ImageReaderContentState extends State<_ImageReaderContent> {
       context: context,
       backgroundColor: Color(0xAA000000),
       builder: (context) {
-        return Container(
+        return SizedBox(
           height: MediaQuery.of(context).size.height * (.45),
           child: _SettingPanel(
             widget.struct.onReloadEp,
@@ -749,11 +747,11 @@ class _EpChooserState extends State<_EpChooser> {
       Container(height: 20),
       ...entries.map((e) {
         return Container(
-          margin: EdgeInsets.only(left: 15, right: 15, top: 5, bottom: 5),
+          margin: const EdgeInsets.only(left: 15, right: 15, top: 5, bottom: 5),
           decoration: BoxDecoration(
             color: widget.epOrder == e.key ? Colors.grey.withAlpha(100) : null,
             border: Border.all(
-              color: Color(0xff484c60),
+              color: const Color(0xff484c60),
               style: BorderStyle.solid,
               width: .5,
             ),
@@ -764,7 +762,7 @@ class _EpChooserState extends State<_EpChooser> {
               widget.onChangeEp(e.key);
             },
             textColor: Colors.white,
-            child: Text('${e.value}'),
+            child: Text(e.value),
           ),
         );
       })
@@ -792,78 +790,74 @@ class _SettingPanelState extends State<_SettingPanel> {
   Widget build(BuildContext context) {
     return ListView(
       children: [
-        Container(
-          child: Row(
-            children: [
-              _bottomIcon(
-                icon: Icons.crop_sharp,
-                title: gReaderDirectionName(),
-                onPressed: () async {
-                  await choosePagerDirection(context);
-                  setState(() {});
-                },
-              ),
-              _bottomIcon(
-                icon: Icons.view_day_outlined,
-                title: currentReaderTypeName(),
-                onPressed: () async {
-                  await choosePagerType(context);
-                  setState(() {});
-                },
-              ),
-              _bottomIcon(
-                icon: Icons.image_aspect_ratio_outlined,
-                title: currentQualityName(),
-                onPressed: () async {
-                  await chooseQuality(context);
-                  setState(() {});
-                },
-              ),
-              _bottomIcon(
-                icon: Icons.control_camera_outlined,
-                title: currentFullScreenActionName(),
-                onPressed: () async {
-                  await chooseFullScreenAction(context);
-                  setState(() {});
-                },
-              ),
-            ],
-          ),
+        Row(
+          children: [
+            _bottomIcon(
+              icon: Icons.crop_sharp,
+              title: gReaderDirectionName(),
+              onPressed: () async {
+                await choosePagerDirection(context);
+                setState(() {});
+              },
+            ),
+            _bottomIcon(
+              icon: Icons.view_day_outlined,
+              title: currentReaderTypeName(),
+              onPressed: () async {
+                await choosePagerType(context);
+                setState(() {});
+              },
+            ),
+            _bottomIcon(
+              icon: Icons.image_aspect_ratio_outlined,
+              title: currentQualityName(),
+              onPressed: () async {
+                await chooseQuality(context);
+                setState(() {});
+              },
+            ),
+            _bottomIcon(
+              icon: Icons.control_camera_outlined,
+              title: currentFullScreenActionName(),
+              onPressed: () async {
+                await chooseFullScreenAction(context);
+                setState(() {});
+              },
+            ),
+          ],
         ),
-        Container(
-          child: Row(
-            children: [
-              _bottomIcon(
-                icon: Icons.shuffle,
-                title: currentAddressName(),
-                onPressed: () async {
-                  await chooseAddress(context);
-                  setState(() {});
-                },
-              ),
-              _bottomIcon(
-                icon: Icons.repeat_one,
-                title: currentImageAddressName(),
-                onPressed: () async {
-                  await chooseImageAddress(context);
-                  setState(() {});
-                },
-              ),
-              _bottomIcon(
-                icon: Icons.refresh,
-                title: "重载页面",
-                onPressed: () {
-                  Navigator.of(context).pop();
-                  widget.onReloadEp();
-                },
-              ),
-              _bottomIcon(
-                icon: Icons.file_download,
-                title: "下载本作",
-                onPressed: widget.onDownload,
-              ),
-            ],
-          ),
+        Row(
+          children: [
+            _bottomIcon(
+              icon: Icons.shuffle,
+              title: currentAddressName(),
+              onPressed: () async {
+                await chooseAddress(context);
+                setState(() {});
+              },
+            ),
+            _bottomIcon(
+              icon: Icons.repeat_one,
+              title: currentImageAddressName(),
+              onPressed: () async {
+                await chooseImageAddress(context);
+                setState(() {});
+              },
+            ),
+            _bottomIcon(
+              icon: Icons.refresh,
+              title: "重载页面",
+              onPressed: () {
+                Navigator.of(context).pop();
+                widget.onReloadEp();
+              },
+            ),
+            _bottomIcon(
+              icon: Icons.file_download,
+              title: "下载本作",
+              onPressed: widget.onDownload,
+            ),
+          ],
         ),
       ],
     );
@@ -917,13 +911,13 @@ class _WebToonReaderState extends _ImageReaderContentState {
 
   @override
   void initState() {
-    widget.struct.images.forEach((e) {
+    for (var e in widget.struct.images) {
       if (e.downloadLocalPath != null) {
         _trueSizes.add(Size(e.width!.toDouble(), e.height!.toDouble()));
       } else {
         _trueSizes.add(null);
       }
-    });
+    }
     _itemScrollController = ItemScrollController();
     _itemPositionsListener = ItemPositionsListener.create();
     _itemPositionsListener.itemPositions.addListener(_onListCurrentChange);
@@ -1077,7 +1071,7 @@ class _WebToonReaderState extends _ImageReaderContentState {
     }
     return Container(
       color: Colors.transparent,
-      padding: EdgeInsets.all(20),
+      padding: const EdgeInsets.all(20),
       child: MaterialButton(
         onPressed: () {
           if (super._hasNextEp()) {
@@ -1238,18 +1232,18 @@ class _ListViewReaderState extends _ImageReaderContentState
   late TapDownDetails _doubleTapDetails;
   late final _animationController = AnimationController(
     vsync: this,
-    duration: Duration(milliseconds: 100),
+    duration: const Duration(milliseconds: 100),
   );
 
   @override
   void initState() {
-    widget.struct.images.forEach((e) {
+    for (var e in widget.struct.images) {
       if (e.downloadLocalPath != null) {
         _trueSizes.add(Size(e.width!.toDouble(), e.height!.toDouble()));
       } else {
         _trueSizes.add(null);
       }
-    });
+    }
     super.initState();
   }
 
@@ -1467,6 +1461,7 @@ class _GalleryReaderState extends _ImageReaderContentState {
     }
   }
 
+  @override
   Widget _buildViewer() {
     Widget gallery = PhotoViewGallery.builder(
       scrollDirection: widget.pagerDirection == ReaderDirection.TOP_TO_BOTTOM
@@ -1574,7 +1569,7 @@ class _GalleryReaderState extends _ImageReaderContentState {
     return Align(
       alignment: Alignment.bottomRight,
       child: Material(
-        color: Color(0x0),
+        color: Colors.transparent,
         child: Container(
           margin: EdgeInsets.only(bottom: 10),
           padding: EdgeInsets.only(left: 10, right: 10, top: 4, bottom: 4),

lib/screens/components/Images.dart

@@ -181,7 +181,7 @@ class DownloadImage extends StatefulWidget {
 }
 
 class _DownloadImageState extends State<DownloadImage> {
-  late Future<String> _future = method.downloadImagePath(widget.path);
+  late final Future<String> _future = method.downloadImagePath(widget.path);
 
   @override
   Widget build(BuildContext context) {
@@ -276,7 +276,7 @@ Widget buildSvg(String source, double? width, double? height,
   var widget = Container(
     width: width,
     height: height,
-    padding: margin != null ? EdgeInsets.all(10) : null,
+    padding: margin != null ? const EdgeInsets.all(10) : null,
     child: Center(
       child: SvgPicture.asset(
         source,
@@ -319,7 +319,7 @@ Widget buildLoading(double? width, double? height) {
   if (width != null && height != null) {
     size = width < height ? width : height;
   }
-  return Container(
+  return SizedBox(
     width: width,
     height: height,
     child: Center(

lib/screens/components/ItemBuilder.dart

@@ -31,7 +31,7 @@ class ItemBuilder<T> extends StatelessWidget {
                 print("${snapshot.stackTrace}");
                 return InkWell(
                   onTap: onRefresh,
-                  child: Container(
+                  child: SizedBox(
                     width: _maxWidth,
                     height: _loadingHeight,
                     child: Center(
@@ -42,7 +42,7 @@ class ItemBuilder<T> extends StatelessWidget {
                 );
               }
               if (snapshot.connectionState != ConnectionState.done) {
-                return Container(
+                return SizedBox(
                   width: _maxWidth,
                   height: _loadingHeight,
                   child: Center(
@@ -50,7 +50,7 @@ class ItemBuilder<T> extends StatelessWidget {
                   ),
                 );
               }
-              return Container(
+              return SizedBox(
                 width: _maxWidth,
                 height: height,
                 child: successBuilder(context, snapshot),

lib/screens/components/LinkToComicInfo.dart

@@ -10,7 +10,8 @@ class LinkToComicInfo extends StatelessWidget {
   const LinkToComicInfo({
     required this.comicId,
     required this.child,
-  });
+    Key? key,
+  }):super(key: key);
 
   @override
   Widget build(BuildContext context) => InkWell(

lib/screens/components/NetworkSetting.dart

@@ -5,16 +5,16 @@ import 'package:pikapika/basic/config/Proxy.dart';
 
 // 网络设置
 class NetworkSetting extends StatelessWidget {
+  const NetworkSetting({Key? key}) : super(key: key);
+
   @override
   Widget build(BuildContext context) {
-    return Container(
-      child: Column(
-        children: [
-          switchAddressSetting(),
-          imageSwitchAddressSetting(),
-          proxySetting(),
-        ],
-      ),
+    return Column(
+      children: [
+        switchAddressSetting(),
+        imageSwitchAddressSetting(),
+        proxySetting(),
+      ],
     );
   }
 }

lib/screens/components/Recommendation.dart

@@ -44,7 +44,7 @@ class _RecommendationState extends State<Recommendation> {
                           (route) => i++ < 10);
                     },
                     child: Card(
-                      child: Container(
+                      child: SizedBox(
                         width: width,
                         child: Column(
                           children: [
@@ -60,8 +60,8 @@ class _RecommendationState extends State<Recommendation> {
                               e.title + '\n',
                               maxLines: 2,
                               overflow: TextOverflow.ellipsis,
-                              style: TextStyle(height: 1.4),
-                              strutStyle: StrutStyle(height: 1.4),
+                              style: const TextStyle(height: 1.4),
+                              strutStyle: const StrutStyle(height: 1.4),
                             ),
                           ],
                         ),

lib/screens/components/UserProfileCard.dart

@@ -16,6 +16,8 @@ const double _cardHeight = 180;
 
 // 用户信息卡
 class UserProfileCard extends StatefulWidget {
+  const UserProfileCard({Key? key}) : super(key: key);
+
   @override
   State<StatefulWidget> createState() => _UserProfileCardState();
 }
@@ -46,11 +48,11 @@ class _UserProfileCardState extends State<UserProfileCard> {
   @override
   Widget build(BuildContext context) {
     var theme = Theme.of(context);
-    var nameStyle = TextStyle(
+    var nameStyle = const TextStyle(
       fontSize: 14,
       fontWeight: FontWeight.bold,
     );
-    var nameStrutStyle = StrutStyle(
+    var nameStrutStyle = const StrutStyle(
       fontSize: 14,
       forceStrutHeight: true,
       fontWeight: FontWeight.bold,
@@ -60,7 +62,7 @@ class _UserProfileCardState extends State<UserProfileCard> {
       color: theme.colorScheme.secondary.withOpacity(.9),
       fontWeight: FontWeight.bold,
     );
-    var levelStrutStyle = StrutStyle(
+    var levelStrutStyle = const StrutStyle(
       fontSize: 12,
       forceStrutHeight: true,
       fontWeight: FontWeight.bold,
@@ -69,7 +71,7 @@ class _UserProfileCardState extends State<UserProfileCard> {
       fontSize: 10,
       color: theme.textTheme.bodyText1?.color?.withOpacity(.5),
     );
-    var sloganStrutStyle = StrutStyle(
+    var sloganStrutStyle = const StrutStyle(
       fontSize: 10,
       forceStrutHeight: true,
     );
@@ -84,34 +86,32 @@ class _UserProfileCardState extends State<UserProfileCard> {
         UserProfile profile = snapshot.data!;
         return Stack(
           children: [
-            Container(
-              child: Stack(
-                children: [
-                  Opacity(
-                    opacity: .25, //
-                    child: LayoutBuilder(
-                      builder:
-                          (BuildContext context, BoxConstraints constraints) {
-                        return RemoteImage(
-                          path: profile.avatar.path,
-                          fileServer: profile.avatar.fileServer,
-                          width: constraints.maxWidth,
-                          height: _cardHeight,
-                        );
-                      },
-                    ),
+            Stack(
+              children: [
+                Opacity(
+                  opacity: .25, //
+                  child: LayoutBuilder(
+                    builder:
+                        (BuildContext context, BoxConstraints constraints) {
+                      return RemoteImage(
+                        path: profile.avatar.path,
+                        fileServer: profile.avatar.fileServer,
+                        width: constraints.maxWidth,
+                        height: _cardHeight,
+                      );
+                    },
                   ),
-                  Positioned.fromRect(
-                    rect: Rect.largest,
-                    child: BackdropFilter(
-                      filter: ImageFilter.blur(sigmaX: 30, sigmaY: 30),
-                      child: Container(),
-                    ),
+                ),
+                Positioned.fromRect(
+                  rect: Rect.largest,
+                  child: BackdropFilter(
+                    filter: ImageFilter.blur(sigmaX: 30, sigmaY: 30),
+                    child: Container(),
                   ),
-                ],
-              ),
+                ),
+              ],
             ),
-            Container(
+            SizedBox(
               height: _cardHeight,
               child: Column(
                 children: [
@@ -177,7 +177,7 @@ class _UserProfileCardState extends State<UserProfileCard> {
         aspectRatioPresets: [
           CropAspectRatioPreset.square,
         ],
-        aspectRatio: CropAspectRatio(ratioX: 200, ratioY: 200),
+        aspectRatio: const CropAspectRatio(ratioX: 200, ratioY: 200),
         maxWidth: 200,
         maxHeight: 200,
         androidUiSettings: AndroidUiSettings(
@@ -187,7 +187,7 @@ class _UserProfileCardState extends State<UserProfileCard> {
           initAspectRatio: CropAspectRatioPreset.original,
           lockAspectRatio: true,
         ),
-        iosUiSettings: IOSUiSettings(
+        iosUiSettings: const IOSUiSettings(
           resetAspectRatioEnabled: true,
           aspectRatioLockEnabled: true,
           title: "修改头像",

lib/screens/components/gesture_zoom_box.dart

@@ -36,7 +36,7 @@ class _GestureZoomBoxState extends State<GestureZoomBox>
   bool _isScaling = false;
   bool _isDragging = false;
 
-  double _maxDragOver = 100; // 拖动超出边界的最大值
+  final double _maxDragOver = 100; // 拖动超出边界的最大值
 
   @override
   void initState() {

pubspec.lock

@@ -104,6 +104,13 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "1.5.1"
+  flutter_lints:
+    dependency: "direct dev"
+    description:
+      name: flutter_lints
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.0.4"
   flutter_localizations:
     dependency: transitive
     description: flutter
@@ -174,7 +181,7 @@ packages:
       name: image_picker
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.8.4+9"
+    version: "0.8.4+11"
   image_picker_for_web:
     dependency: transitive
     description:
@@ -210,6 +217,13 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "0.6.3"
+  lints:
+    dependency: transitive
+    description:
+      name: lints
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.0.1"
   matcher:
     dependency: transitive
     description:
@@ -237,14 +251,14 @@ packages:
       name: modal_bottom_sheet
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.0.0"
+    version: "2.0.1"
   multi_select_flutter:
     dependency: "direct main"
     description:
       name: multi_select_flutter
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "4.0.0"
+    version: "4.1.2"
   path:
     dependency: transitive
     description:
@@ -417,7 +431,7 @@ packages:
       name: url_launcher_web
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.0.8"
+    version: "2.0.9"
   url_launcher_windows:
     dependency: transitive
     description:

pubspec.yaml

@@ -49,6 +49,7 @@ dependencies:
 dev_dependencies:
   flutter_test:
     sdk: flutter
+  flutter_lints: ^1.0.0
 
 # For information on the generic Dart part of this file, see the
 # following page: https://dart.dev/tools/pub/pubspec

test/widget_test.dart

@@ -13,7 +13,7 @@ import 'package:pikapika/main.dart';
 void main() {
   testWidgets('Counter increments smoke test', (WidgetTester tester) async {
     // Build our app and trigger a frame.
-    await tester.pumpWidget(PikapikaApp());
+    await tester.pumpWidget(const PikapikaApp());
 
     // Verify that our counter starts at 0.
     expect(find.text('0'), findsOneWidget);