三星S8在开发者模式下连接VS2017时意外断开连接问题求助

Hey John, let's work through this frustrating USB disconnect problem you're facing with your Samsung S8 and Xamarin setup. I’ve helped troubleshoot similar issues with Samsung devices before, so here are some targeted fixes to try:

Common Troubleshooting Steps #

• Check your USB cable and port first
  A lot of "disconnect" issues boil down to a faulty cable or port. Swap out your current cable for a genuine Samsung USB data cable (some cheap cables only handle charging, not data transfer). Also, try plugging into a different USB port on your PC—preferably a USB 2.0 port, as USB 3.0 can sometimes cause compatibility hiccups with older Android devices.

• Tweak Samsung-specific developer settings
  Samsung adds extra layers to USB debugging that can cause disconnects:

  1. Open your S8’s Developer Options, enable USB debugging (Security settings) (this allows apps to debug even when the screen is locked).
  2. Set Default USB configuration to either Transferring files (MTP) or Transferring images (PTP), and make sure Stay awake is enabled to prevent the phone from sleeping and dropping the connection.
  3. If you never saw the "Allow USB debugging from this computer" prompt, go to Revoke USB debugging authorizations in Developer Options, then reconnect your phone to trigger the prompt again—be sure to check "Always allow from this computer".

• Update drivers and SDK components
  Even though you have the Google USB driver installed, Samsung’s official USB driver often works better with their devices. Install the Samsung Galaxy S8 USB driver to replace or supplement the Google driver. Also, open Visual Studio and go to Tools > Android > Android SDK Manager to update your SDK Build Tools, Platform Tools, and Xamarin components to the latest versions compatible with Android 8 (API 26).

• Restart the ADB server
  Sometimes the Android Debug Bridge (ADB) process gets stuck. Open an elevated Command Prompt (Run as Administrator) and run these commands:

  adb kill-server
  adb start-server
  

  You can also restart ADB directly from Visual Studio: go to Tools > Android > Restart ADB Server.

• Disable Windows Fast Startup
  Fast Startup can interfere with USB device detection. Here’s how to turn it off:

  1. Open Control Panel > Power Options > Choose what the power buttons do.
  2. Click Change settings that are currently unavailable.
  3. Uncheck "Turn on fast startup (recommended)" and save changes. Restart your PC afterward.

• Try wireless debugging as a workaround
  If USB issues persist, switch to wireless debugging to bypass the hardware connection:

  1. Enable Wireless debugging in your S8’s Developer Options.
  2. On your PC, open Command Prompt and run adb connect [your-phone-IP-address]:5555 (find your phone’s IP in Settings > About Phone > Status).
  3. Visual Studio should detect the wireless connection, and you can deploy/debug without a USB cable.

Start with the cable and port checks—those are the quickest wins. If none of these steps resolve the disconnect, we can dig into logcat logs to pinpoint exactly what’s causing the drop.

内容的提问来源于stack exchange，提问作者JohnKoz