This error can occur when code calls setState() from a timer or an animation callback...._framePicList (package:flutter_app/widget/ace_frame_animated.dart:32:5) E/flutter (13298): #3 _ACEFrameAnimatedState... (package:flutter_app/widget/ace_frame_animated.dart:40:43) E/flutter (13298): #4...: #7 _CustomZone.runGuarded (dart:async/zone.dart:925:7) E/flutter (13298): #8 _CustomZone.bindCallbackGuarded... (dart:async-patch/timer_patch.dart:23:15) E/flutter (13298): #13 _Timer.
I/flutter (21935): The context used to push or pop routes from the Navigator must be that of a widget...(package:flutter/src/widgets/navigator.dart:1482:6) I/flutter (21935): #2 Navigator.push (package...(package:flutter/src/gestures/recognizer.dart:182:24) I/flutter (21935): #8 TapGestureRecognizer...(package:flutter/src/gestures/binding.dart:198:22) I/flutter (21935): #15 GestureBinding....:172:5) I/flutter (21935): (elided 3 frames from package dart:async) I/flutter (21935): I/flutter (21935
学习自： Dart Flutter教程_Dart Flutter入门实战视频教程-2019年新出....open file, path = '/storage/emulated/0/Download/timg.jpg' (OS Error: Permission denied, errno I/flutter... (dart:io/file_impl.dart:364:9) I/flutter ( 4794): (elided 13 frames from package...dart:async) I/flutter ( 4794): ......:flutter/material.dart'; import 'package:transparent_image/transparent_image.dart'; void main() => runApp
(package:flutter/src/widgets/navigator.dart:1482:6) I/flutter (21935): #2 Navigator.push (package...(package:flutter/src/gestures/recognizer.dart:182:24) I/flutter (21935): #8 TapGestureRecognizer...(package:flutter/src/gestures/binding.dart:198:22) I/flutter (21935): #15 GestureBinding....:172:5) I/flutter (21935): (elided 3 frames from package dart:async) I/flutter (21935): I/flutter (21935...:flutter/material.dart';包； CupertinoPageRoute：存在于：import 'package:flutter/cupertino.dart';包； 使用： 直接把我们用来
10M的Dart server镜像 这是篇快文。 serverless时代，用什么开发你的后端？Go? NodeJs ? 其实随着Flutter的流行，我们还有个选项 -- Dart。...:shelf/shelf.dart'; import 'package:shelf/shelf_io.dart' as shelf_io; import 'package:shelf_static/shelf_static.dart...:hipo/mysql_utils.dart'; import 'package:shelf_router/shelf_router.dart' as shelf_router; import 'package...import 'package:hipo/mysql_utils.dart'; import 'package:mysql1/mysql1.dart'; final getDb = (Map<String...FROM scratch ARG DART_ENV=production ENV DART_ENV=${DART_ENV} COPY --from=build /runtime/ / COPY --
以网络请求为例，我们在Dart中定义一个MethodChannel对象： import 'dart:async'; import 'package:flutter/services.dart'; const...(package:wm_app/lib/all_category/model/category_model.g.dart:19) #8 new AllCategoryResponse.fromJson...(package:flutter/src/widgets/framework.dart:3642) #13 Element.rebuild (package:flutter/src/widgets..._handleDrawFrame (package:flutter/src/scheduler/binding.dart:842) #20 _rootRun (dart:async/zone.dart...:1126) #21 _CustomZone.run (dart:async/zone.dart:1023) #22 _CustomZone.runGuarded (dart:async
， 这段代码是用来和本地设备交互，然后将交互结果返回供flutter前端调用， 如下所示： package com.cube8.flutter_native_log_plugin; import io.flutter.plugin.common.MethodCall...文件，这段代码是主要用来和native代码交互， 如下所示： import 'dart:async'; import 'package:flutter/services.dart'; class FlutterNativeLogPlugin...在lib/flutter_native_log_plugin.dart 文件中，我们先创建一个新的方法，代码如下： import 'dart:async'; import 'package:flutter.../material.dart'; import 'package:flutter/services.dart'; enum Log { DEBUG, WARNING, ERROR } class FlutterNativeLogPlugin...当开发完了我们的plugin之后，我们需要测试这个新plugin是否可用，于是对example/lib的main.dart文件作如下修改： import 'package:flutter/material.dart
flutter sdk升级遇到的异常： E/flutter (17545): [ERROR:flutter/lib/ui/ui_dart_state.cc(157)] Unhandled Exception.../flutter (17545): #7 getTheme (package:wanandroid_flutter/main.dart:41:50) E/flutter (17545): #8... (dart:ui/hooks.dart:239:25) E/flutter (17545): #10 _rootRun (dart:async/zone.dart...:1126:13) E/flutter (17545): #11 _CustomZone.run (dart:async/zone.dart:1023:19) E/flutter (17545)...: #12 _runZoned (dart:async/zone.dart:1518:10) E/flutter (17545): #13 runZoned (dart:async/zone.dart
import 'package:test/test.dart'; import 'package:my_app/big_numbers.dart'; void main() { test('addBigNumbers...在Dart中，我们可以使用flutter_test包进行集成测试。...例如，我们可以创建一个文件test/app_test.dart来测试我们的整个应用： import 'package:flutter_test/flutter_test.dart'; import 'package...) async { // Build our app and trigger a frame...., findsOneWidget); expect(find.text('1'), findsNothing); // Tap the '+' icon and trigger a frame
要不，我们就看看Flutter Inspector是如何把我们 flutter app的树结构显示到devTools上的把，随着深挖下去，我们在app.dart中找到这样一段代码 /// The routes...entry once flutter_web and flutter are // unified. const inspectorLibraryUriCandidates = [ 'package...:flutter/src/widgets/widget_inspector.dart', 'package:flutter_web/src/widgets/widget_inspector.dart...', ]; 稍微追踪一下代码，就能够发现isWidgetTreeReady，就是去问package:flutter/src/widgets/widget_inspector.dart这个类中的方法...If the /// application is ready, the next Flutter.Frame event may never come as no /// new frames
:flutter/material.dart'; import 'package:flutter_open_camera_photo/submsg/wx_text.dart'; Container addLine...:flutter_easy_permission/constants.dart'; import 'package:flutter_easy_permission/flutter_easy_permission.dart...:dio/dio.dart'; import 'package:flutter_open_camera_photo/base/http/http_manager.dart'; import 'package...:flutter_open_camera_photo/base/model/AbstractModel.dart'; import 'package:flutter_open_camera_photo/...:dio/dio.dart'; import 'package:flutter_open_camera_photo/base/model/IModel.dart'; import 'package:flutter_open_camera_photo
Demo 初始状态 首先我们新建 Flutter 项目，修改 main.dart 代码如下： import 'package:flutter/material.dart'; void main()...其实很简单，有个通用模板，模板为： import 'dart:async'; import 'package:flutter/material.dart'; Future<Null main()...: (error, stackTrace) async { await _reportError(error, stackTrace); }); } Future<Null _reportError...完整例子如下： import 'dart:async'; import 'package:flutter/material.dart'; Future<Null main() async { FlutterError.onError...完整模板 import 'dart:async'; import 'package:flutter/material.dart'; Future<Null main() async { FlutterError.onError
(package:flutter/src/material/ink_well.dart:562:30)I/flutter ( 7457): [2019-02-09..._checkUp (package:flutter/src/gestures/tap.dart:242:9)I/flutter ( 7457): [2019-02-09 12:40:21.534524...ConsoleHandler | INFO] #8 PointerRouter....09 12:40:21.535600 | ConsoleHandler | INFO] #15 _rootRunUnary (dart:async/zone.dart:1136:13)I/flutter...(dart:async/zone.dart:931:7)I/flutter ( 7457): [2019-02-09 12:40:21.536138 | ConsoleHandler | INFO]
_checkUp (package:flutter/src/gestures/tap.dart:242:9) I/flutter ( 7457): [2019-02-09 12:40:21.534524...(package:flutter/src/gestures/recognizer.dart:315:9) I/flutter ( 7457): [2019-02-09 12:40:21.534686...| ConsoleHandler | INFO] #8 PointerRouter....-09 12:40:21.535600 | ConsoleHandler | INFO] #15 _rootRunUnary (dart:async/zone.dart:1136:13) I/flutter...CustomZone.runUnaryGuarded (dart:async/zone.dart:931:7) I/flutter ( 7457): [2019-02-09 12:40:21.536138
）： Error: No pubspec.yaml file found....下面看看我们的示例代码如下： （1）修改examples/hello_world/lib/main.dart代码如下所示： import 'package:flutter_web/material.dart...2.把项目中所有的dart:ui包换成package:flutter_ui/ui.dart包。...import 'package:flutter_web_ui/ui.dart' as ui; // TODO: change `my_app` to refer to your app package...name. import 'package:my_app/main.dart' as app; main() async { await ui.webOnlyInitializePlatform
: OS Error: Connection reset by peer, errno = 104 环境 flutter doctor -v >flutter doctor -v [√] Flutter...(build 1.8.0_202-release-1483-b03) ---- 集成过程 首先来到 flutter package 这个 flutter 相关的库网站，然后搜了下 mqtt，找到 mqtt_client...原示例地址：https://pub.flutter-io.cn/packages/mqtt_client#-example-tab- import 'dart:async'; import 'dart:...主要逻辑如下： import 'dart:async'; import 'dart:io'; import 'package:path/path.dart' as path; import 'package...:mqtt_client/mqtt_client.dart'; Future main() async { ...
(17 hours ago) • 2020-07-02 01:58:01 -0400 Engine • revision 65ac8be350 Tools • Dart 2.9.0 (build 2.9.0...-20.0.dev f8ff12008e) ---[· flutter channel Flutter channels: * master dev beta stable ---...如果上面的main.dart有个×，八成是SDK没有配置好，可以在Settings...-->Languaes &Frameworks-->Flutter面板配置 ?...import 'package:window_size/window_size.dart' as window_size; void main() { // Try to resize and reposition...说一下package和plugin的区别: Flutter对于平台级的包是plugin，比如主要是和平台相关的功能，如path_provider、sqlfilte, 用纯Dart的开发的包是package
(17 hours ago) • 2020-07-02 01:58:01 -0400 Engine • revision 65ac8be350 Tools • Dart 2.9.0 (build 2.9.0...-20.0.dev f8ff12008e) ---[· flutter channel Flutter channels: * master dev beta stable ---...import 'package:window_size/window_size.dart' as window_size; void main() { // Try to resize and reposition...the window to be half the width and height // of its screen, centered horizontally and shifted up from...说一下package和plugin的区别: Flutter对于平台级的包是plugin，比如主要是和平台相关的功能，如path_provider、sqlfilte, 用纯Dart的开发的包是package
Flutter 请求网络的三种方式 flutter 请求网络的方式有三种，分别是 Dart 原生的网络请求 HttpClient、第三方网络请求 http以及 Flutter 中的 Dio。...bean class File from JSON ?...:io'; import 'package:dio/dio.dart'; import 'package:private_tutor/common/SpUtils.dart'; import 'package...:connectivity/connectivity.dart'; import 'dart:collection'; import 'package:private_tutor/common/config.../Config.dart'; import 'package:private_tutor/net/ResultCode.dart'; import 'package:private_tutor/net/
// home_page_games.dart import 'package:flutter/material.dart'; import 'package:flutter_bloc/flutter_bloc.dart...// categories_widget.dart import 'package:flutter/material.dart'; import 'package:flutter_bloc/flutter_bloc.dart...// category_item.dart import 'package:flutter/material.dart'; import 'package:flutter_bloc/flutter_bloc.dart.../flutter_bloc.dart'; import 'package:infogames/ui/widgets/error_widget.dart'; import 'games_by_category_barrel.dart...// all_games_widget.dart import 'package:flutter/material.dart'; import 'package:flutter_bloc/flutter_bloc.dart
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