我的Dart代码中的错误以及android studio的其他错误 [英] Errors in my dart code and other errors with android studio
问题描述
注意:我是扑镖的初学者，所以请使答案易于理解
Note: I am a beginner in flutter and dart so please make the answers understandable
- 当我打开avd管理器并运行电话时，屏幕上显示无法找到adb".然后打开电话.
- (加载时间很长)
- 当我在android studio中运行程序时，出现了以下错误:(在flutter控制台中也出现了相同的错误)
C:\Flutter SDK\flutter\bin\cache\dart-sdk\bin\dart.exe" --enable-asserts --enable-vm-service:58163 C:\Users\user\my_app\lib\main.dart
lib/main.dart: Warning: Interpreting this as package URI, 'package:my_app/main.dart'.
Observatory listening on http://127.0.0.1:58163/ozLrsFGRARk=/
/C:/Flutter%20SDK/flutter/packages/flutter/lib/src/material/animated_icons.dart:9:8: Error: Not found: 'dart:ui'
import 'dart:ui' as ui show Paint, Path, Canvas;
^
/C:/Flutter%20SDK/flutter/packages/flutter/lib/src/material/animated_icons.dart:10:8: Error: Not found: 'dart:ui'
import 'dart:ui' show lerpDouble;
^
/C:/Flutter%20SDK/flutter/packages/flutter/lib/src/material/app.dart:5:8: Error: Not found: 'dart:ui'
import 'dart:ui' as ui;
^
/C:/Flutter%20SDK/flutter/packages/flutter/lib/src/material/app_bar_theme.dart:5:8: Error: Not found: 'dart:ui'
import 'dart:ui' show lerpDouble;
^
/C:/Flutter%20SDK/flutter/packages/flutter/lib/src/material/arc.dart:6:8: Error: Not found: 'dart:ui'
import 'dart:ui' show lerpDouble;
^
/C:/Flutter%20SDK/flutter/packages/flutter/lib/src/material/bottom_app_bar_theme.dart:5:8: Error: Not found: 'dart:ui'
import 'dart:ui' show lerpDouble;
^
/C:/Flutter%20SDK/flutter/packages/flutter/lib/src/material/bottom_sheet.dart:6:8: Error: Not found: 'dart:ui'
import 'dart:ui' show lerpDouble;
^
/C:/Flutter%20SDK/flutter/packages/flutter/lib/src/material/bottom_sheet_theme.dart:5:8: Error: Not found: 'dart:ui'
import 'dart:ui' show lerpDouble;
^
/C:/Flutter%20SDK/flutter/packages/flutter/lib/src/material/button_bar_theme.dart:5:8: Error: Not found: 'dart:ui'
import 'dart:ui' show lerpDouble;
^
/C:/Flutter%20SDK/flutter/packages/flutter/lib/src/material/card_theme.dart:5:8: Error: Not found: 'dart:ui'
import 'dart:ui' show lerpDouble;
^
Process finished with exit code 254
- 系统UI没有响应".手机何时加载
Flutter医生没有给我任何错误
Flutter doctor gave me no errors
手机什么都没出现
似乎找不到"dart:ui"?
It seems it can't find "dart:ui"?
我什至不知道那是什么，我正在按照本书中的步骤进行操作:
I don't even know what that is, im following the steps in this book:
还请注意:我是stackoverflow的新手，这是我的第一个问题
Also note: I'm new to stackoverflow, this is my first question
我正在使用颤动创建样本
Im using the flutter create sample
还有一件事，如何连接我的iphone并在其上运行示例?
One more thing, how can I connect my iphone and run the sample on it?
谢谢.
推荐答案
欢迎使用StackOverflow！这些是很多问题.希望我能为您解决问题.
Welcome to StackOverflow! These are quite a lot of questions. I hope that I can help you with your problems.
-
我个人建议您尽可能在物理设备上测试您的应用.虚拟设备在我的系统上的运行速度也很慢.
I personally recommend that you test your app on a physical device whenever possible. Virtual devices are also running pretty slow on my system.
dart:ui 是一个包含许多重要内容的dart库.如果打开了flutter项目，则需要在控制台中运行 flutter pub get ，以将所有使用的库加载到项目中.
dart:ui is a dart library that contains lots of important stuff.
If you opened a flutter project, you need to run flutter pub get in your console to load all the used libraries into your project.
系统UI没有响应".设备运行缓慢并因此而在此挂起时，偶尔会在Android中显示该消息.我怀疑这是由于您的PC上的虚拟Android设备的性能不佳造成的.
"System UI is not responding" is occasionally displayed in Android when the device is running slowly and therefore hangs here and there. I suspect that this is due to the poor performance of the virtual Android device on your PC.
手机什么都没出现
Nothing appears in the phone
由于错误，您的项目无法编译并下载到手机.因此，显示屏上什么也没出现.
Your project could not be compiled and downloaded to the mobile phone due to the errors. Therefore nothing appeared on the display.
请按照本书中的步骤
im following the steps in this book
您还可以在flutter网站上查看在线示例.我发现它们描述得非常好，即使对于初学者也很有趣.看看:编写您的第一个Flutter应用
You can also have a look at the online examples on the flutter website. I find them very well described and interesting even for beginners. Have a look at: Write your first Flutter app
还有一件事，如何连接我的iphone并在其上运行示例?
One more thing, how can I connect my iphone and run the sample on it?
要在iPhone上运行项目，您需要Macbook或iMac.我建议您阅读Flutter在线文档中的这篇文章: macOS安装(本文的进一步内容:部署到iOS设备).
To run your project on your iPhone, you need a Macbook or iMac. I recommend you to work along this article of the flutter online documentation: macOS install (further in this article: Deploy to iOS devices).
祝你好运！
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