我尝试使用Flutter开发应用程序(使用Android工作室IDE).在工作室中添加了flutter插件和flutter SDK并且Everything已配置但未列出模拟器/实时设备.它显示错误,如"无法列出设备:无法发现Android设备.请运行"flutter doctor"来诊断潜在问题"
当我尝试运行该应用程序时,我收到此错误 Task 'assembleAarRelease' not found in root project 'flutter_plugin_android_lifecycle'。如何解决这个问题?
在进行 Flutter 小部件测试时,WidgetTester如果我了解树中至少一个小部件,我可以从中获取上下文。Text例如,如果我知道测试小部件树中有一个小部件,我可以
BuildContext context = tester.element(find.byType(Text));
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我怎样才能获得更普遍的背景?例如,我可以获取树的根小部件并获取它的BuildContext吗?
我使用logfromimport 'dart:developer';但当我使用 from 单元测试时它似乎不会打印任何内容。
我应该使用什么来在测试和开发环境中而不是在生产环境中进行日志记录?
谢谢。
我正在尝试运行基本的 flutter 集成测试来调用我的主应用程序小部件,但它失败了。\n我已遵循官方文档 [https://docs.flutter.dev/testing/integration-测试]
\n这是完整的堆栈跟踪:
\nRunning "flutter pub get" in my_app... 2,651ms\nRunning Gradle task \'assembleStagingDebug\'... \nRunning Gradle task \'assembleStagingDebug\'... Done 35.1s\n\xe2\x9c\x93 Built build/app/outputs/flutter-apk/app-staging-debug.apk.\nInstalling build/app/outputs/flutter-apk/app.apk... 10.5s\nVMServiceFlutterDriver: Connecting to Flutter application at http://127.0.0.1:56037/_2tNx8J1Lj8=/\nVMServiceFlutterDriver: Isolate found with number: 4501853398952855\nVMServiceFlutterDriver: Isolate is paused at start.\nVMServiceFlutterDriver: Attempting to resume isolate\nD/EGL_emulation(29263): eglMakeCurrent: 0xa27a1bc0: ver 3 0 (tinfo 0xa2a835b0)\nI/flutter (29263): 00:00 +0: (setUpAll)\nVMServiceFlutterDriver: Connected to Flutter application.\nI/flutter (29263): 00:00 +1: My Tests Basic Home Screen Smoke test\nI/flutter (29263): (The following exception is now available via …Run Code Online (Sandbox Code Playgroud) 我正在为Flutter编写单元和集成测试.是否可以从给定的窗口小部件访问子窗口/父窗口小部件?
我正在尝试使用Flutter中的圆角创建一个警告对话框,如下面的屏幕截图所示.也在这里添加我的代码,但我的输出与预期的完全不同.有人,请帮帮我.

我的代码在这里.
void _showAlert() {
AlertDialog dialog = new AlertDialog(
content: new Container(
width: 260.0,
height: 230.0,
decoration: new BoxDecoration(
shape: BoxShape.rectangle,
color: const Color(0xFFFFFF),
borderRadius: new BorderRadius.all(new Radius.circular(32.0)),
),
child: new Column(
crossAxisAlignment: CrossAxisAlignment.stretch,
children: <Widget>[
// dialog top
new Expanded(
child: new Row(
children: <Widget>[
new Container(
// padding: new EdgeInsets.all(10.0),
decoration: new BoxDecoration(
color: Colors.white,
),
child: new Text(
'Rate',
style: TextStyle(
color: Colors.black,
fontSize: 18.0,
fontFamily: 'helvetica_neue_light',
),
textAlign: TextAlign.center,
),
),
],
),
), …Run Code Online (Sandbox Code Playgroud) I'm facing an issue while doing widget testing on a widget that throws an exception during a Future.
Code to reproduce the problem
Here's a simple testwidget that reproduces the problem in a very simple way (thanks to Remi Rousselet for the simplification of the problem).
testWidgets('This test should pass but fails', (tester) async {
final future = Future<void>.error(42);
await tester.pumpWidget(FutureBuilder(
future: future,
builder: (_, snapshot) {
return Container();
},
));
});
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Expected result
我希望测试能够顺利完成。相反,它失败并显示以下错误:
??? EXCEPTION CAUGHT BY …Run Code Online (Sandbox Code Playgroud) 当我执行颤振运行时,出现错误
找不到目标文件“ lib / main.dart”。
为什么会发生这种情况,我该如何解决?
在 VS 代码中启动“flutter run”并收到以下错误:
2020-05-02 16:23:57.827 xcodebuild[97219:3069326] DTDeviceKit:来自 00008030-000D35311160802E 的 deviceType 为 NULL
关于这意味着什么的任何建议?