【发布时间】：2021-05-07 09:18:47
【问题描述】：
在将工作项目升级到 Flutter_2 并运行它时，出现以下错误。
As per answer to similar question ,Avd Data(Pixel_3a) 一直是wiped。
如何解决这个问题？
错误
Can't find service: package / Can't find service: activity
完全错误
Launching lib\forms\validateForm1.dart on sdk gphone x86 arm in debug mode...
Running Gradle task 'assembleDebug'...
√ Built build\app\outputs\flutter-apk\app-debug.apk.
cmd: Can't find service: activity
Installing build\app\outputs\flutter-apk\app.apk...
Error: ADB exited with exit code 1
Performing Streamed Install
adb: failed to install F:\Script\Flutter\myapp\build\app\outputs\flutter-apk\app.apk: cmd: Can't find service: package
Error launching application on sdk gphone x86 arm.
颤振医生
Doctor summary (to see all details, run flutter doctor -v):
[√] Flutter (Channel dev, 2.1.0-10.0.pre, on Microsoft Windows [Version 10.0.18363.1379], locale en-US)
[√] Android toolchain - develop for Android devices (Android SDK version 30.0.3)
[X] Chrome - develop for the web (Cannot find Chrome executable at .\Google\Chrome\Application\chrome.exe)
! Cannot find Chrome. Try setting CHROME_EXECUTABLE to a Chrome executable.
[√] Visual Studio - develop for Windows (Visual Studio Community 2019 16.8.3)
[√] Android Studio (version 4.1.0)
[√] VS Code (version 1.54.1)
[√] Connected device (2 available)
【问题讨论】：
-
Class
two的构造函数采用（可选）命名参数，而不是位置参数。从其构造函数的参数列表中删除花括号（{和}）以使其具有位置性，或者将其构造函数调用为two(a: 4, b: 5, c: 6)。
标签： flutter dart flutter-dependencies