1、首先检查一下你的SDK 是否安装了，如果没有安装SDK，请先安装!如果安装SDK之后用系统管理员的身份打开SDK Manager 看下是否安装了Google USB Driver

2、如果安装了Google USB Driver，还不能解决问题，则继续，右键我的电脑，选择到设备管理器，右键更新驱动，如图

3、选择 Browse my computer for driver software

4、选择Let me pick from a list of device drivers on my computer.

5、选择Show All Devices.

6、点击 Have Disk按钮.

7、Enter the path to the Google USB driver. Normally it is located in the following directory:

8、选择 Android ADB interface from the list of device types.

9、等安装完之后 回到 android studio 运行，就可以解决问题了