adb no permissions问题

 Google一番，得知可以通过用root权限启动adb server来解决问题，但是每次用adb不会很麻烦嘛？！

后来发现在SDK的帮助文档里有关于这个问题的说明：

If you’re developing on Ubuntu Linux, you need to add a rules file that contains a USB configuration for each type of device you want to use for development. Each device manufacturer uses a different vendor ID. The example rules files below show how to add an entry for a single vendor ID (the HTC vendor ID). In order to support more devices, you will need additional lines of the same format that provide a different value for the SYSFS{idVendor} property. For other IDs, see the table of USB Vendor IDs, below.

1. Log in as root and create this file: /etc/udev/rules.d/51-android.rules.

   For Gusty/Hardy, edit the file to read:
   SUBSYSTEM=="usb", SYSFS{idVendor}=="0bb4", MODE="0666"

   For Dapper, edit the file to read:
   SUBSYSTEM=="usb_device", SYSFS{idVendor}=="0bb4", MODE="0666"

2. Now execute:
   chmod a+r /etc/udev/rules.d/51-android.rules

只要按照说明，在/etc/udev/rules.d/目录下创建51-android.rules文件，写入自己手机的信息就好了。
什么？你有多个不同品牌的Android手机或平板？每一个都添加自然是可以的，当然也有简便方法啦。
只要在51-android.rules中保留一行

1 SUBSYSTEM=="usb", ENV{DEVTYPE}=="usb_device", MODE="0666"

就好了~
修改以后重新插入你的Android设备，运行adb devices命令看看：

List of devices attached
M1105bfb6840 device

怎么样可以识别了吧~