blocks|key|151273|text|我知道这是一个古老的问题，但这是我的答案，它为我解决了这个问题。我已经浏览了我能找到的所有文章，并尝试了所有的方法。它不适合我在mac或PC上使用。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|151274|解决方案:使用另一条USB电缆。|151275|我一定是抓到了一条质量不好的不支持文件传输的电缆。我使用了不同的USB电缆，系统立即提示我选择ptp模式并授权进行远程调试。|151276|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|H|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|I|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|J|8|@]|9|@]|A|$]]|$1|F|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|G|$]]

I know this is an old question but here is my answer that solved it for me. I had gone through all of the articles I could find and tried everything. It would not work for me on a mac or PC.

Solution: Use another USB cable. 

I must have grabbed a poor quality cable that did not support file transfers. I used a different USB cable and immediately got prompted for ptp mode and authorization for remote debugging.

blocks|key|4657696|text|ADB必须正在运行。只需转到|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4657697|C:\Users\yourUserName\AppData\Local\Android\Sdk\platform-tools并运行adb+devices，守护程序应启动，然后显示所有连接的设备。|offset|length|style|CODE|4657698|entityMap^0|0|0|1Q|1T|B|0^^$0|@$1|2|3|4|5|6|7|J|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|K|8|@$D|L|E|M|F|G]|$D|N|E|O|F|G]]|9|@]|A|$]]|$1|H|3|-4|5|6|7|P|8|@]|9|@]|A|$]]]|I|$]]

ADB must be running. Just go to

<code>C:\Users\yourUserName\AppData\Local\Android\Sdk\platform-tools</code> and run <code>adb devices</code>, daemon should start and then show all connected devices.

blocks|key|4657933|text|运行adb命令行。像这样|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|4657934|adb+devices|code-block|syntax|javascript|4657935|entityMap^0|2|3|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@$9|N|A|O|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|P|8|@]|D|@]|E|$I|J]]|$1|K|3|-4|5|6|7|Q|8|@]|D|@]|E|$]]]|L|$]]

run <code>adb</code> command line. like this

<pre><code>adb devices
</code></pre>

blocks|key|4657421|text|如果你使用的是windows操作系统，你需要为手机安装驱动程序。你可以让他们使用here。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|4657422|如果它仍然不工作，我已经幸运地通过手动重新启动Android+Debug+Bridge手动连接。更多信息请访问here。|4657423|entityMap|0|LINK|mutability|MUTABLE|url|http://developer.samsung.com/android/tools-sdks/Samsung-Andorid-USB-Driver-for-Windows|1|https://stackoverflow.com/a/9966660/1876861^0|14|4|0|0|1J|4|1|0^^$0|@$1|2|3|4|5|6|7|P|8|@]|9|@$A|Q|B|R|1|S]]|C|$]]|$1|D|3|E|5|6|7|T|8|@]|9|@$A|U|B|V|1|W]]|C|$]]|$1|F|3|-4|5|6|7|X|8|@]|9|@]|C|$]]]|G|$H|$5|I|J|K|C|$L|M]]|N|$5|I|J|K|C|$L|O]]]]

If you're on windows, you need to install the drivers for your phone. You can get them <a href="http://developer.samsung.com/android/tools-sdks/Samsung-Andorid-USB-Driver-for-Windows" rel="nofollow noreferrer">here</a>.

If it still doesn't work, I've had luck connecting by manually restarting the Android Debug Bridge manually. More info is <a href="https://stackoverflow.com/a/9966660/1876861">here</a>.

blocks|key|4657955|text|Chrome似乎在重新协商设备身份验证时出现了错误。您可以尝试禁用USB调试，然后再次启用它。有时您会收到一个弹出窗口，要求您再次信任您的计算机密钥。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4657956|或者你可以去你的Android+SDK并运行adb+devices，这将强制重新协商。|offset|length|style|CODE|4657957|在任一(或两个)之后，Chrome应该会开始工作。|4657958|entityMap^0|0|M|B|0|0^^$0|@$1|2|3|4|5|6|7|L|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|M|8|@$D|N|E|O|F|G]]|9|@]|A|$]]|$1|H|3|I|5|6|7|P|8|@]|9|@]|A|$]]|$1|J|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|K|$]]

Chrome appears to have bug renegotiating the device authentication. You can try disabling USB Debugging and enabling it again. Sometimes you'll get a pop-up asking you to trust your computer key again.

Or you can go to your Android SDK and run <code>adb devices</code> which will force a renegotiation.

After either (or both), Chrome should start working.

blocks|key|151302|text|我尝试@maurice+cruz回答，但无法获得实际的驱动程序。然后我找到了this+post，它为他们的设备下载了全球LG驱动程序(不确定它是否涵盖了所有，但很多)。安装后，然后切换usb调试关闭，然后再打开，我收到RSA接受提示。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|151303|entityMap|0|LINK|mutability|MUTABLE|url|http://www.technobuzz.net/install-lg-g3-lg-drivers-windows-mac-usb-adb/^0|12|9|0|0^^$0|@$1|2|3|4|5|6|7|L|8|@]|9|@$A|M|B|N|1|O]]|C|$]]|$1|D|3|-4|5|6|7|P|8|@]|9|@]|C|$]]]|E|$F|$5|G|H|I|C|$J|K]]]]

I tried @maurice cruz answer and was unable to get the actual drivers. Then I found <a href="http://www.technobuzz.net/install-lg-g3-lg-drivers-windows-mac-usb-adb/" rel="nofollow noreferrer">this post</a> which had a download for global LG driver (not sure if it covers all, but many) for their devices. After installing, then toggling usb debugging off then back on, I was prompted with RSA acceptance.

blocks|key|4657499|text|我是应用程序编程的新手，这是我尝试使用LG+G3设备进行示例程序调试时遇到的第一个问题。上面的详细说明的帖子应该适用于所有人。我正在添加我的经验，以防对其他人有帮助：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4657500|我是按照指示一步一步来做的。也就是说，从我的OEM安装USB驱动程序。我的手机一直在通知调试正在进行(在通知区域)，我可以传输数据和充电。这让我觉得安装了合适的USB驱动程序。但事实并非如此，最后我去LG+site下载了我的LG+G3的驱动程序。在我安装驱动程序并通过电缆将手机重新连接到计算机后，我得到了RSA密钥提示。我的Chrome现在可以检测到它，我也可以通过Android+studio在我的手机上运行我的应用程序。|offset|length|4657501|entityMap|0|LINK|mutability|MUTABLE|url|http://www.lg.com/us/support/software-firmware^0|0|2S|7|0|0^^$0|@$1|2|3|4|5|6|7|N|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|O|8|@]|9|@$D|P|E|Q|1|R]]|A|$]]|$1|F|3|-4|5|6|7|S|8|@]|9|@]|A|$]]]|G|$H|$5|I|J|K|A|$L|M]]]]

I am new to app programming and this was the first problem I ran into when I tried to get a sample program debug using my LG G3 device. The post above with detailed instructions should work for all. I am adding my experience in case it helps other:

I had followed instructions step by step but one. That is, installing the USB driver from my OEM. My phone kept notifying that the debugging is on (in the notification area) and I could transfer data as well as charge. That made me think that appropriate USB drivers are installed. But it wasn't. Finally I went to <a href="http://www.lg.com/us/support/software-firmware" rel="nofollow noreferrer">LG site</a> and downloaded the USB driver for my LG G3. Right after I installed the driver and reconnected the phone to the computer via the cable, I got the RSA key prompt. My Chrome now detects it and I was able to get my app run on my phone via Android studio as well.

blocks|key|151486|text|在我打开和关闭手机上的启用调试功能后，切换“发现USB设备”似乎启动了一些东西。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|151487|另外，另一根电缆可能是问题所在。我的情况可能干扰了数据连接，但不确定。|151488|​|151489|📷|atomic|offset|length|151490|151491|entityMap|0|IMAGE|mutability|IMMUTABLE|imageUrl|https://ask.qcloudimg.com/http-save/yehe-900000/e1965e9af73cdd6b14578434a81c74d6.png|imageAlt^0|0|0|0|0|1|0|0|0^^$0|@$1|2|3|4|5|6|7|U|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|V|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|W|8|@]|9|@]|A|$]]|$1|F|3|G|5|H|7|X|8|@]|9|@$I|Y|J|Z|1|10]]|A|$]]|$1|K|3|E|5|6|7|11|8|@]|9|@]|A|$]]|$1|L|3|-4|5|6|7|12|8|@]|9|@]|A|$]]]|M|$N|$5|O|P|Q|A|$R|S|T|-4]]]]

Toggling 'Discover USB devices' seemed to kickstart something after I'd toggled the enable debugging feature on and off on the phone. 

Also a different cable may have been the issue. My case may have been interfering with the connection for data, but not sure.

<a href="https://i.stack.imgur.com/1i0wI.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/1i0wI.png" alt="enter image description here"></a>

blocks|key|151542|text|使用运行安卓Pie的三星Galaxy+S9。--+2019年5月，答案类似于上面的答案，NickW发布的答案是:一旦你的设备连接上了，就不需要进入设置，而是进入手机的通知栏>+Android系统，然后“点击查看其他USB选项。”在选项下选择MIDI，你就可以开始了！|type|unstyled|depth|inlineStyleRanges|entityRanges|data|151543|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

Using a Samsung Galaxy S9 running Android Pie. -- May 2019
Similar to the answer above, and NickW's post for that answer:
Once your device is connected, instead of going to settings, go to the phone's notification bar > Android System and 'Tap for other USB options.' Select MIDI under the options and you're good to go!

blocks|key|4657602|text|只是在这里添加这个作为参考，我正在尝试连接LG+usb手机，Chrome开发工具无法识别它，直到我下载了LG+G5驱动程序here。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|4657603|祝大家好运！|4657604|entityMap|0|LINK|mutability|MUTABLE|url|https://www.mylgphones.com/lg-android-usb-device-drivers^0|1P|4|0|0|0^^$0|@$1|2|3|4|5|6|7|N|8|@]|9|@$A|O|B|P|1|Q]]|C|$]]|$1|D|3|E|5|6|7|R|8|@]|9|@]|C|$]]|$1|F|3|-4|5|6|7|S|8|@]|9|@]|C|$]]]|G|$H|$5|I|J|K|C|$L|M]]]]

Just adding this here for reference, I was trying to connect an LG G5 Android phone and Chrome dev tools did not recognize it until I downloaded the LG usb driver <a href="https://www.mylgphones.com/lg-android-usb-device-drivers" rel="nofollow noreferrer">here</a>.

Good luck, all!

blocks|key|4657648|text|我使用过六种不同的Android设备和多根电缆，我不得不说调试器的工作不稳定。有时它能看到设备，有时却看不到。有时重启Chrome会有所帮助。这里有一个相关的bug+https://bugs.chromium.org/p/chromium/issues/detail?id=788161，也许你可以为你的证据做出贡献。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|4657649|entityMap|0|LINK|mutability|MUTABLE|url|https://bugs.chromium.org/p/chromium/issues/detail?id=788161^0|2B|1O|0|0^^$0|@$1|2|3|4|5|6|7|L|8|@]|9|@$A|M|B|N|1|O]]|C|$]]|$1|D|3|-4|5|6|7|P|8|@]|9|@]|C|$]]]|E|$F|$5|G|H|I|C|$J|K]]]]

I've worked with six different Android devices and multiple cables and I have to say that debugger works unstably. Sometimes it can see the device, sometimes it doesn't. Sometimes restarting Chrome helps. Here is a related bug <a href="https://bugs.chromium.org/p/chromium/issues/detail?id=788161" rel="nofollow noreferrer">https://bugs.chromium.org/p/chromium/issues/detail?id=788161</a>, may be you can contribute with your evidence.

blocks|key|151436|text|在电话上，确保已打开调试模式。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|151437|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

On the phone make sure that the debugging mode is turned on.

I cannot seem to get the DevTools Devices feature to work on my Samsung Galaxy S4 even after following the steps outlined at <a href="https://developers.google.com/chrome-developer-tools/docs/remote-debugging">https://developers.google.com/chrome-developer-tools/docs/remote-debugging</a>

My device has Chrome v32 and Chrome Beta v33, while my PC has Chrome v33 and Chrome Canary v35.

USB debugging is enabled on my device and device driver has been installed. I have never got the prompt as outline in step 3 from the above link to approve the RSA key fingerprint yet the device does connect to my PC to allow media transfer. I have even revoked all USB debugging authorizations as per the link above.

I don't have any thing extra installed on my PC for Android development which may perhaps be the issue. I wish to utilise this feature to inspect web pages from the devices point of view.

Chrome DevTools Devices does not detect device when plugged in

设备驱动程序

远程调试

身份验证

调试器

Android

我似乎无法在我的三星盖乐世S4上使用DevTools设备功能，即使遵循了中概述的步骤我的设备有Chrome v32和Chrome Beta v33，而我的电脑有Chrome v33和Chrome Canary v35。已在我的设备上启用USB调试，并且已安装设备驱动程序。我从来没有从上面的链接中得到步骤3中的提示符，以批准RSA密钥指纹，但设备确实连接到我的PC以允许媒体传输。我甚至已经根据上面的

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