Android Studio No connected devices found; please connect a device, or see flutter.io/setup for get

自己顶起来  学 flutter 好多坑啊！！！

设备未连接

或者时adb 断开了

------------------

adb start-server启动下

上一个坑填完了 又来个坑 谁遇到过 帮看看。

Launching lib\main.dart on Android SDK built for x86 64 in debug mode...
Initializing gradle...
Resolving dependencies...
Finished with error: Please review your Gradle project setup in the android/ folder.
* Error running Gradle:
ProcessException: Process "D:\workspace-an\flutter_one\android\gradlew.bat" exited abnormally:

FAILURE: Build failed with an exception.

* What went wrong:
A problem occurred configuring root project 'android'.
> Could not resolve all artifacts for configuration ':classpath'.
   > Could not resolve com.android.tools.build:gradle:3.2.1.
     Required by:
         project :
      > Could not resolve com.android.tools.build:gradle:3.2.1.
         > Could not get resource 'https://maven.aliyun.com/repository/google/com/android/tools/build/gradle/3.2.1/gradle-3.2.1.pom'.
            > Could not GET 'https://maven.aliyun.com/repository/google/com/android/tools/build/gradle/3.2.1/gradle-3.2.1.pom'.
               > Connect to mirrors.dormforce.net:80 [mirrors.dormforce.net/202.115.22.208] failed: Connection timed out: connect

* 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 23s
  Command: D:\workspace-an\flutter_one\android\gradlew.bat app:properties

我也遇到这个问题了，最后楼主是怎么解决的