Android Studio-设备已连接但“离线” [英] Android Studio - Device is connected but 'offline'

问题描述

这是一个非常普遍的问题，但是没有一种解决方案适合我。第一次问问，如果我对约定的理解不对，则深表歉意。

This is quite a common question, but none of the solutions appear to work for me. First time asker, so apologies if I get the conventions wrong.

我正在尝试将Galaxy S5连接到运行Ubuntu 14.04的计算机，以便进行一些Android开发。我最近下载并安装了Android Studio和SDK，并且通过USB连接设备时可以检测到我的设备，但是该设备显示为未经授权或离线。我知道我应该期待RSA密钥提示，但是永远不会出现。

I am trying to connect my Galaxy S5 to my computer running Ubuntu 14.04 so I can do some android development. I have recently downloaded and installed Android Studio and the SDK and my device is detected when it's connected via USB but the device either appears as 'unauthorized' or 'offline'. I know I should be expecting the RSA key prompt but this never appears.

我已经尝试过：

• 已启用调试检查


• 运行adb杀毒服务器和adb设备


• 重新启动（设备，开发人员选项，计算机）


• 简单地拔出并重新插入USB电缆


• 检查我的adb版本（1.0.31）


• 尝试不同的USB端口


• 取消USB调试授权


• 在Android Studio中切换启用ADB集成


• 作为PTP设备和MTP设备连接

• Checking debugging was enabled
• Running adb kill-server and adb devices
• Restarting (the device, developer options, the machine)
• Simple unplugging and replugging the USB cable
• Checking my adb version (it is 1.0.31)
• Trying different USB ports
• Revoking USB debugging authorizations
• Toggling enabling ADB Integration from within Android Studio
• Connecting as PTP device and MTP device

我已经在运行fedora的另一台计算机上尝试过，并且工作正常，没有任何问题，提示立即出现。因此，我想这不是USB电缆出现故障。

I have tried it on a separate machine that runs fedora and this works fine with no issues, the promopt appears right away. Therefore I imagine it is not the USB cable that is faulty.

有什么想法吗？

推荐答案

尝试以下操作：

• 拔出并重新插入USB电缆。


• 如果仍然不起作用，请拔下USB电缆，禁用然后在设备设置中启用USB调试。


• 如果以上两种方法均失败，请重新启动设备。


• 如果重新启动设备也失败，也重新启动Android Studio。


• 如果重新启动Android Studio仍然失败，请尝试 adb kill-server 然后 adb启动服务器

• Unplug and replug the USB cable.
• If it still doesn't work, unplug the USB cable, disable then enable USB debugging in the device settings.
• If the above two methods fail, reboot the device.
• If rebooting the device also fails, reboot Android Studio too.
• If reboot Android Studio still fail, try adb kill-server then adb start-server

希望这会有所帮助。

这篇关于Android Studio-设备已连接但“离线”的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！