Flutter真机不识别No connected devices

Flutter 真机测试时，点击run 运行项目提示错误：

No connected devices found; please connect a device, or see flutter.io/setup for getting started ins

解决方案：

进入到Flutter sdk 的路径下 开启命令行运行
flutter config --android-sdk 自己环境的android sdk路径
如图所示操作