adb server is out of date. killing...

From: http://blog.csdn.net/macong01/article/details/11356537

执行 adb 命令时会出现

[html]
view plaincopyprint?

adb server is out of date. killing......
ADB server didn't ACK
* failed to start daemon *
error: unknown host service

adb server is out of date.  killing......
ADB server didn't ACK
* failed to start daemon *
error: unknown host service

可能是adb端口被占用，查看adb用的是哪个端口：adb nodaemon server

[html]
view plaincopyprint?

C:\Users\Administrator>adb nodaemon server
cannot bind 'tcp:5037'

C:\Users\Administrator>adb nodaemon server
cannot bind 'tcp:5037'

查看谁占用了这个端口：netstat -ano | findstr "5037"

[html]
view plaincopyprint?

C:\Users\Administrator>netstat -ano | findstr "5037" TCP 127.0.0.1:5037 0.0.0.0:0 LISTENING 3508

C:\Users\Administrator>netstat -ano | findstr "5037"
TCP    127.0.0.1:5037         0.0.0.0:0              LISTENING       3508

可以打开任务管理器关闭该进程(注：我在任务管理器里面找不到该进程)。所以直接用命令行kill该进程：taskkill /F /PID 3508

[html]
view plaincopyprint?

C:\Users\Administrator>taskkill /F /PID 3508 成功: 已终止 PID 为 3508 的进程。

C:\Users\Administrator>taskkill /F /PID 3508
成功: 已终止 PID 为 3508 的进程。

至此，adb即可正常使用。