如果设备处于MTP模式，则调试时可能不可见。有些设备只在PTP模式下工作(甚至在“仅充电”模式下)。

可以在“设置”中更改>开发人员选项>网络> USB默认配置> PTP。

此外，你会在你的android设备上收到一个通知，要求你确认USB配置设置的变化，并允许它。

注意:您可以通过以下链接打开开发人员选项: 启用开发人员选项

正常情况下，SDB会在**android-sdk-windows\extras\谷歌\usb_driver**路径下下载驱动程序

以下是对我有用的步骤:

打开USB调试开关。 执行到设备管理器，右键单击ADB设备，然后单击更新驱动程序软件。 选择“浏览我的计算机以获取驱动程序软件” 选择“让我从计算机上的设备驱动程序列表中选择” 点击“拥有磁盘”选项。 选择驱动路径**android-sdk-windows\extras\谷歌\usb_driver** (sdk路径) 7.从显示的车手列表中选择第一个车手。

希望它能起作用。

Windows 8无法识别我的Nexus 10设备。通过设备上的设置对话框设置传输模式为摄像机(PTP)修正。

>存储>菜单> USB计算机连接到“相机(PTP)”

启用设备中的开发人员选项。开启开发者模式，设置->关于话机，连续8次轻按“构建号码”选项

进入设置->开发人员选项并打开USB调试

从上面的步骤，它没有工作，尝试这一步，转到设置->安全，并打开允许未知资源

我偶尔还会遇到这种情况，如果我拔掉它，然后把它插回不同的端口，它通常会工作。我用的是Linux，但之前在Windows上也发生了同样的事情。

For the Blu Studio 5.5s ADB drivers, you have to go through this hoop. I am certain it is the same with all Blu phones or maybe for all non-Google mfg phones, I am not sure. First of all if you connect the Blu device with USB cable and USB Debuggin off, you will see that Windows 7 loads a generic driver for you to copy on/off files to the phone and SD storage. This will appear when the USB cable is first plugged in and appears as a device icon under Control Panel, Device Manager, Portable Devices, BLU STUDIO 5.5 S (or the device you are working with). Do not bother getting the hardware ID yet - just observe that this happens (which indicates you are good so far and don't have a bad cable or something).

Go to the phone and switch on USB Debugging in the Developer section of your phone. Notice that an additional item appears as an undefined device now in the device manager list, it will have the yellow exclamation mark and it may have the same name of the phone listed as you saw under Portable Devices. Ignore this item for the moment. Now, without doing anything to the phone (it should be already in USB debug mode) go back to the Portable Devices in Device Manager and right-click the BLU STUDIO 5.5 S or whatever phone you are working with that is listed there without the exclamation mark (listed under Portable Devices). Right click on the icon under Portable Devices, in this example the name that appears is BLU STUDIO 5.5 S. On that icon select Properties, Details, and under the pull down, select Hardware IDs and copy down what you see.

对于BLU STUDIO 5.5 S，我得到:

USB\VID_0BB4&PID_0C02&REV_0216&MI_00
USB\VID_0BB4&PID_0C02&MI_00

(注意，如果你不按顺序这样做，HW ID将与手机USB调试关闭时不同。你想复制的值，它改变时，USB调试是ON)

现在按照上面的说明进行操作，当然要定制添加INF文件的行，使用与您自己的手机相关的行，而不是与Nexus 10相关的行。下面是要定制的内容;当你下载SDK时，你应该有一个从ZIP扩展而来的文件结构，如下所示:

\adt-bundle-windows-x86_64-20140321\sdk\extras\google\usb_driver

找到名为android_winusb的文件。usb_driver文件夹中的Inf 复制它并命名为任何名称，比如myname.inf 编辑myname。Inf和添加行如上所述，只修改为您的特定电话。例如，对于BLU STUDIO 5.5 S，我根据提示在2个位置添加了以下2行。

;BLU STUDIO 5.5 S
%SingleAdbInterface%        = USB_Install, USB\VID_0BB4&PID_0C02&REV_0216&MI_00
%CompositeAdbInterface%     = USB_Install, USB\VID_0BB4&PID_0C02&MI_00

请注意，您将这些行添加到32位和64位部分中，以与教程中的示例相匹配。

Now go back up to the unknown device that appeared in Device Manager when you switched on device USB debugging and right click on this item (has yellow exclamation mark), right click on it and then select Update Driver Software, and then Browse My Computer, Let Me Pick, click on the Have Disk button and browse to find the myname.inf. Continue to agree to all the prompts warning you it might not be the right driver. As the final step, Windows should have identified the device as Android ADB Interface and once that is done, you should be able to go back, open your CMD window and run the command "adb devices" as instructed in this tutorial and now you should see that the phone is now discovered and communicating.

现在您可以开始使用adb命令了。