adb shell提示device offline

adb 在已经连接上的情况下提示设备离线：

C:\Users\Administrator>adb connect 192.168.0.208already connected to 192.168.0.208:5555C:\Users\Administrator>adb shell error: device offline

这时可以先断开连接再连，可能就好了

C:\Users\Administrator>adb disconnect 192.168.0.208disconnected 192.168.0.208C:\Users\Administrator>adb connect 192.168.0.208connected to 192.168.0.208:5555C:\Users\Administrator>adb shellshell@p212:/ $ suroot@p212:/ #