adb server version (31) doesn't match this client (40); killing...

问题： adb server version (31) doesn't match this client (40); killing...     解决： 1.查看当前android-sdk的adb版本号，cmd打开输入adb version adb version   2、下载版本 覆盖 原有的adb.exe，即可 3、再次执行:  

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