Android 4.2.2 USB调试“总是允许从这台计算机”选项导致设备的目标未知？ [英] Android 4.2.2 USB debugging "Always allow from this computer" option result in target unknown for device?

问题描述

我选择了始终允许从这个计算机在4.2.2 USB调试中，它第一次工作正常，但是当我尝试其他时间，我的设备总是显示离线。我尝试使用另一个设备，也是4.2.2和USB调试弹出窗口，当我点击确定（不选择始终允许从这台电脑）设备列表成为在线。

我尝试了以下方法，但它没有起作用。

• adb kill-server / adb start-server / and adb设备


• 安装新的eclipse，android SDK和ADT


• 插拔我的设备千次


• 尝试从这个链接

有一次我会摆脱永远允许从这台电脑选择？

解决方案

如这个问题，如果以root身份首次运行 adb ，可能会发生这种情况。它在您的计算机上创建由root用户拥有的密钥文件，因此您的普通用户帐户无法读取或覆盖它。

要检查是否是这种情况：

  $ ls -l〜/ .android / adbkey 
 -rw ------- 1根根1708 Nov 13 2012 .android / adbkey 
 ^ notice root here 
  

要解决它： / p>

  $ sudo chown $ USER：〜/ .android / adbkey 
 $ ls -l〜/ .android / adbkey 
 $ -rw ------- 1 thomas thomas 1708 Nov 13 2012 /home/thomas/.android/adbkey 
 ^现在显示您的用户名和主组
  

I am having problem connecting my 4.2.2 android device with PC after I select "Always allow from this computer".

I have selected "Always allow from this computer" in 4.2.2 USB debugging and it works fine the first time but when I tried other time my devices always appear offline. I have tried with another device that is also 4.2.2 and the USB debugging popup and when I click ok (without selecting "Always allow from this computer") with device list became online.

I have tried the following method and it didn't work

• adb kill-server/ adb start-server/ and adb devices
• install new eclipse, android SDK, and ADT
• Plug and unplug my device thousand times
• try repeating steps from this link

Are there anyway to get rid of "Always allow from this computer" once I selected?

解决方案

As described in this issue, this can happen if you run adb for the first time as root. It creates a key file on your computer owned by the root user, so your normal user account can't read or overwrite it.

To check if this is the case:

$ ls -l ~/.android/adbkey
-rw------- 1 root root 1708 Nov 13  2012 .android/adbkey
             ^ notice root here

To fix it:

$ sudo chown $USER: ~/.android/adbkey
$ ls -l ~/.android/adbkey
$ -rw------- 1 thomas thomas 1708 Nov 13  2012 /home/thomas/.android/adbkey
               ^ now shows your username and primary group

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