解决ADB启动问题(Failed to initialize Monitor Thread: Unable to establish loopback connection)

问题

Failed to initialize Monitor Thread: Unable to establish loopback connection
ADB server didn’t ACK
failed to start daemon *

解决办法： dos下进入SDK目录下的tools目录，执行以下命令：

adb kill-server
adb start-server

如果还有这个问题，请关闭你的防火墙，OK！