第一次运行flutter_app的

1.运行报错

第一次运行会卡在 Resovle ...中很长时间，然后就会报错

Launching lib\main.dart on Android SDK built for x86 64 in debug mode...
Initializing gradle...
Resolving dependencies...
* Error running Gradle:
ProcessException: Process "C:\Codes\kakaCode\Android\flutter_app\android\gradlew.bat" exited abnormally:
 
> Configure project :app
 
Project evaluation failed including an error in afterEvaluate {}. Run with --stacktrace for details of the afterEvaluate {} error.
 
FAILURE: Build failed with an exception.
 
* Where:
Build file 'C:\Codes\kakaCode\Android\flutter_app\android\app\build.gradle' line: 24
 
* What went wrong:
A problem occurred evaluating project ':app'.
> Could not resolve all artifacts for configuration 'classpath'.
   > Could not find aapt2-proto.jar (com.android.tools.build:aapt2-proto:0.3.1).
     Searched in the following locations:
         https://jcenter.bintray.com/com/android/tools/build/aapt2-proto/0.3.1/aapt2-proto-0.3.1.jar
 
* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run with --scan to get full insights.
 
* Get more help at https://help.gradle.org
 
BUILD FAILED in 0s
  Command: C:\Codes\kakaCode\Android\flutter_app\android\gradlew.bat app:properties
 
Finished with error: Please review your Gradle project setup in the android/ folder。

重点在于

ProcessException: Process "C:\Codes\kakaCode\Android\flutter_app\android\gradlew.bat" exited abnormally:

原因：

flutter 需要梯子在jcenter和google库里下载依赖，但是又因为有厚厚的墙访问不到，她就会在哪里憋着不动。

解决方法：

1.需要再你app 里的build.gradle 加阿里云的镜像

2.需要在你flutter sdk 的如下路径下的 flutter.gradle 也同样添加镜像。

E:\MspSoftwares\flutter\packages\flutter_tools\gradle

添加的内容：
maven{ url 'https://maven.aliyun.com/repository/google' }
maven{ url 'https://maven.aliyun.com/repository/jcenter' }
maven{url 'http://maven.aliyun.com/nexus/content/groups/public'}

此问题这两步，可以得到解决！

如果还有其他问题，还会更新。

第一次运行flutter_app的

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