add hint

Author: CarGuo

analysis_options.yaml

@@ -0,0 +1,11 @@
+include: package:flutter_lints/flutter.yaml
+
+analyzer:
+  errors:
+    mixin_inherits_from_not_object: ignore
+
+linter:
+  rules:
+    library_private_types_in_public_api: false
+    constant_identifier_names: false
+    library_prefixes: false

lib/main.dart

@@ -1,3 +1,4 @@
+import 'package:flutter/foundation.dart';
 import 'package:flutter/material.dart';
 import 'package:gsy_flutter_demo/widget/align_demo_page.dart'
     deferred as align_demo_page;
@@ -213,9 +214,11 @@ import 'package:gsy_flutter_demo/widget/pageview_in_pageview_demo_page.dart'
 
 import 'package:window_location_href/window_location_href.dart';
 
-void main() => runApp(MyApp());
+void main() => runApp(const MyApp());
 
 class MyApp extends StatelessWidget {
+  const MyApp({super.key});
+
   // This widget is the root of your application.
   @override
   Widget build(BuildContext context) {
@@ -224,34 +227,36 @@ class MyApp extends StatelessWidget {
       theme: ThemeData(
         useMaterial3: false,
         primarySwatch: Colors.blue,
-        textButtonTheme: TextButtonThemeData(
+        textButtonTheme: const TextButtonThemeData(
           // 去掉 TextButton 的水波纹效果
           style: ButtonStyle(splashFactory: NoSplash.splashFactory),
         ),
       ),
-      home: MyHomePage(title: 'GSY Flutter Demo'),
+      home: const MyHomePage(title: 'GSY Flutter Demo'),
       routes: routers,
     );
   }
 }
 
 class MyHomePage extends StatefulWidget {
-  MyHomePage({Key? key, this.title}) : super(key: key);
+  const MyHomePage({super.key, this.title});
 
   final String? title;
 
   @override
-  _MyHomePageState createState() => _MyHomePageState();
+  MyHomePageState createState() => MyHomePageState();
 }
 
-class _MyHomePageState extends State<MyHomePage> {
+class MyHomePageState extends State<MyHomePage> {
   @override
   void initState() {
     //loadLibrary();
     super.initState();
-    print("get enum value with 2.15 ${Cat.white.name}");
-    print("get enum value with 2.15 ${Cat.values.byName("black")}");
-    print("get enum value with 2.17 ${Cat.white.value} ${Cat.white}");
+    if (kDebugMode) {
+      print("get enum value with 2.15 ${Cat.white.name}");
+      print("get enum value with 2.15 ${Cat.values.byName("black")}");
+      print("get enum value with 2.17 ${Cat.white.value} ${Cat.white}");
+    }
 
     final href = getHref();
     int? index = href?.indexOf("#");
@@ -276,25 +281,23 @@ class _MyHomePageState extends State<MyHomePage> {
       appBar: AppBar(
         title: Text(widget.title!),
       ),
-      body: new Container(
-        child: new ListView.builder(
-          itemBuilder: (context, index) {
-            return new InkWell(
-              onTap: () {
-                Navigator.of(context).pushNamed(routeLists[index]);
-              },
-              child: new Card(
-                child: new Container(
-                  alignment: Alignment.centerLeft,
-                  margin: EdgeInsets.symmetric(horizontal: 10),
-                  height: 50,
-                  child: new Text(routers.keys.toList()[index]),
-                ),
+      body: ListView.builder(
+        itemBuilder: (context, index) {
+          return InkWell(
+            onTap: () {
+              Navigator.of(context).pushNamed(routeLists[index]);
+            },
+            child: Card(
+              child: Container(
+                alignment: Alignment.centerLeft,
+                margin: const EdgeInsets.symmetric(horizontal: 10),
+                height: 50,
+                child: Text(routers.keys.toList()[index]),
               ),
-            );
-          },
-          itemCount: routers.length,
-        ),
+            ),
+          );
+        },
+        itemCount: routers.length,
       ), // This trailing comma makes auto-formatting nicer for build methods.
     );
   }
@@ -307,7 +310,7 @@ class ContainerAsyncRouterPage extends StatelessWidget {
   ///稍后更新文章到掘金
   final WidgetBuilder child;
 
-  ContainerAsyncRouterPage(this.libraryFuture, this.child);
+  const ContainerAsyncRouterPage(this.libraryFuture, this.child, {super.key});
 
   @override
   Widget build(BuildContext context) {
@@ -322,7 +325,7 @@ class ContainerAsyncRouterPage extends StatelessWidget {
                   alignment: Alignment.center,
                   child: Text(
                     'Error: ${s.error}',
-                    style: TextStyle(color: Colors.red),
+                    style: const TextStyle(color: Colors.red),
                   ),
                 ),
               );
@@ -333,7 +336,7 @@ class ContainerAsyncRouterPage extends StatelessWidget {
             appBar: AppBar(),
             body: Container(
               alignment: Alignment.center,
-              child: CircularProgressIndicator(),
+              child: const CircularProgressIndicator(),
             ),
           );
         });
@@ -940,6 +943,8 @@ extension CatExtension on Cat {
   // }
 
   void talk() {
-    print('meow');
+    if (kDebugMode) {
+      print('meow');
+    }
   }
 }

lib/widget/align_demo_page.dart

@@ -2,22 +2,24 @@ import 'dart:math' as math;
 import 'package:flutter/material.dart';
 
 class AlignDemoPage extends StatefulWidget {
+  const AlignDemoPage({super.key});
+
   @override
-  _AlignDemoPageState createState() => _AlignDemoPageState();
+  AlignDemoPageState createState() => AlignDemoPageState();
 }
 
-class _AlignDemoPageState extends State<AlignDemoPage>
+class AlignDemoPageState extends State<AlignDemoPage>
     with SingleTickerProviderStateMixin {
   getAlign(x) {
     return Align(
-      child: new Container(
+      alignment: Alignment(math.cos(x * math.pi), math.sin(x * math.pi)),
+      child: Container(
         height: 20,
         width: 20,
-        decoration: BoxDecoration(
+        decoration: const BoxDecoration(
             color: Colors.green,
             borderRadius: BorderRadius.all(Radius.circular(10))),
       ),
-      alignment: Alignment(math.cos(x * math.pi), math.sin(x * math.pi)),
     );
   }
 
@@ -26,11 +28,11 @@ class _AlignDemoPageState extends State<AlignDemoPage>
     int size = 20;
     return Scaffold(
       appBar: AppBar(
-        title: new Text("AlignDemoPage"),
+        title: const Text("AlignDemoPage"),
       ),
-      body: new Container(
-        alignment: Alignment(0, 0),
-        child: Container(
+      body: Container(
+        alignment: const Alignment(0, 0),
+        child: SizedBox(
           height: MediaQuery.sizeOf(context).width,
           width: MediaQuery.sizeOf(context).width,
           child: Stack(

lib/widget/anim_bg_demo_page.dart

@@ -6,34 +6,36 @@ import 'package:supercharged/supercharged.dart';
 enum _ColorTween { color1, color2 }
 
 class AnimBgDemoPage extends StatelessWidget {
+  const AnimBgDemoPage({super.key});
+
   @override
   Widget build(BuildContext context) {
     return Scaffold(
       appBar: AppBar(
-        title: new Text("AnimBgDemoPage"),
+        title: const Text("AnimBgDemoPage"),
       ),
       body: Stack(
         children: <Widget>[
-          Positioned.fill(child: AnimatedBackground()),
-          onBottom(AnimatedWave(
+          const Positioned.fill(child: AnimatedBackground()),
+          onBottom(const AnimatedWave(
             height: 180,
             speed: 1.0,
           )),
-          onBottom(AnimatedWave(
+          onBottom(const AnimatedWave(
             height: 120,
             speed: 0.9,
             offset: pi,
           )),
-          onBottom(AnimatedWave(
+          onBottom(const AnimatedWave(
             height: 220,
             speed: 1.2,
             offset: pi / 2,
           )),
-          Positioned.fill(
-              child: new Center(
-            child: new Text(
+          const Positioned.fill(
+              child: Center(
+            child: Text(
               "GSY Flutter Demo",
-              style: new TextStyle(
+              style: TextStyle(
                   fontSize: 30,
                   fontWeight: FontWeight.bold,
                   color: Colors.white),
@@ -57,12 +59,12 @@ class AnimatedWave extends StatelessWidget {
   final double? speed;
   final double offset;
 
-  AnimatedWave({this.height, this.speed, this.offset = 0.0});
+  const AnimatedWave({super.key, this.height, this.speed, this.offset = 0.0});
 
   @override
   Widget build(BuildContext context) {
     return LayoutBuilder(builder: (context, constraints) {
-      return Container(
+      return SizedBox(
         height: height,
         width: constraints.biggest.width,
         child: LoopAnimationBuilder<double>(
@@ -112,17 +114,19 @@ class CurvePainter extends CustomPainter {
 }
 
 class AnimatedBackground extends StatelessWidget {
+  const AnimatedBackground({super.key});
+
   @override
   Widget build(BuildContext context) {
     final tween = MovieTween()
       ..tween(
         _ColorTween.color1,
-        Color(0xffD38312).tweenTo(Colors.lightBlue.shade900),
+        const Color(0xffD38312).tweenTo(Colors.lightBlue.shade900),
         duration: 3.seconds,
       )
       ..tween(
         _ColorTween.color2,
-        Color(0xffA83279).tweenTo(Colors.blue.shade600),
+        const Color(0xffA83279).tweenTo(Colors.blue.shade600),
         duration: 3.seconds,
       );
 

lib/widget/anim_bubble_gum.dart

@@ -9,13 +9,15 @@ import 'package:flutter/material.dart';
 /// https://codepen.io/rx-labz/pen/xxwdGaM?__cf_chl_jschl_tk__=830b2fd03dd1ccb9ac8d7c1fdbdee39e71fc2e7c-1587971334-0-AQ6h_JKRflUPLJcJhlH7eT841oCDgD5EttuC0cq9I50PQHwBtecDMdA9H-_a9FitSk4HQwlPO3dvvYn83act0FI6ufSlRL7MCB-gJVkKQov2i-AVA92X3KFwD93JOfog1LMy9yTdUyNb1zr43ZgC2X-cg0IsMGPr6U54kAb40AQgoK-KbYc9-KYWUIFqFy8pShOZIfn23-0lInSjKlJ3p8rnLXp84p7rhdTNrQU0pWPKNiDkuuthEaqzi9THfk4-iTrZ3CJ6wU0t81T9GyKwIT5VthFlnuPyNqIKseggtyxBxgZJ4W4ec6FmQoFp7bYAQF9rFb3D5L_3juEL-262JH_TP20ojcgjb30pvNnHyTfh
 
 class AnimBubbleGumDemoPage extends StatelessWidget {
+  const AnimBubbleGumDemoPage({super.key});
+
   @override
   Widget build(BuildContext context) {
     return Scaffold(
       appBar: AppBar(
-        title: Text("AnimBubbleGumDemoPage"),
+        title: const Text("AnimBubbleGumDemoPage"),
       ),
-      body: Container(color: Colors.pink[200], child: AnimBubbleGum()),
+      body: Container(color: Colors.pink[200], child: const AnimBubbleGum()),
     );
   }
 }
@@ -40,18 +42,20 @@ class Circle {
 }
 
 class AnimBubbleGum extends StatefulWidget {
+  const AnimBubbleGum({super.key});
+
   @override
-  _AnimBubbleGumState createState() => _AnimBubbleGumState();
+  AnimBubbleGumState createState() => AnimBubbleGumState();
 }
 
-class _AnimBubbleGumState extends State<AnimBubbleGum> {
+class AnimBubbleGumState extends State<AnimBubbleGum> {
   late Timer timer;
 
   final circles = <Circle>[];
 
   late Size size;
 
-  Offset force = Offset(1, 1);
+  Offset force = const Offset(1, 1);
 
   HSLColor hslColor = HSLColor.fromColor(Colors.pink[100]!);
 
@@ -70,7 +74,7 @@ class _AnimBubbleGumState extends State<AnimBubbleGum> {
     timer = Timer.periodic(
       frequency,
       (t) {
-        if (circles.isEmpty)
+        if (circles.isEmpty) {
           _circleStreamer.add(
             circles
               ..add(
@@ -81,6 +85,7 @@ class _AnimBubbleGumState extends State<AnimBubbleGum> {
                 ),
               ),
           );
+        }
         int count = 0;
         while (count < 29) {
           final p = // newPoint
@@ -118,7 +123,7 @@ class _AnimBubbleGumState extends State<AnimBubbleGum> {
   Widget build(BuildContext context) => Stack(
         children: [
           StreamBuilder<List<Circle>>(
-            initialData: [],
+            initialData: const [],
             stream: _circle$.map(
               (event) => event.length > numCircles
                   ? event
@@ -164,11 +169,12 @@ class Painter extends CustomPainter {
               c.offset! - Offset(0, c.radius),
               c.radius,
               [
-                Color(0x53ffffff),
+                const Color(0x53ffffff),
                 Colors.transparent,
               ],
             );
         }
+      // ignore: empty_catches
       } catch (e) {}
       //too heavy for mobile web rendering