Nexus 5X无法通过USB连接的Android开发问题求助

Hey there! Let's break down your problems one by one—first figuring out if it's a hardware or setting issue, then covering wireless development without a wired connection.

1. Is this a hardware failure or a USB mode setting issue? #

Let's start with the easiest fixes first, since setting misconfigurations are way more common than hardware failures:

• Double-check your USB configuration on the Nexus 5X
  Even with USB debugging enabled, if your phone is set to "Charging only" for USB use, adb/Android Studio won't recognize it. Head to Developer Options > Select USB Configuration and make sure you've picked either "MTP (Media Transfer Protocol)" or "PTP (Picture Transfer Protocol)". This is a super common oversight!

• Verify Mac's USB recognition
  On your Mac, click the Apple menu → About This Mac → System Report → USB. Look for "Nexus 5X" (or a device labeled with LG, since Nexus 5X was made by LG) in the list.

  • If you see it: Hardware is fine—this is a software/setup issue. Try restarting your phone, Mac, and restarting the adb service with these commands in Terminal:

    adb kill-server
    adb start-server
    

  • If you don't see it at all: Since you've tried multiple USB-C cables (including ones made for Nexus 5X), this points to a possible hardware issue with your phone's USB-C port. You might want to check for physical damage (like lint blocking the port) or get it inspected.

• Quick sanity checks

  • Restart both your Nexus 5X and Mac—sometimes cached connections cause recognition failures.
  • Ensure your Nexus 5X is running the latest Android 8 update (outdated firmware can cause compatibility issues with adb).

2. Wireless development without a wired connection (Android 8) #

Android 8 doesn't have the built-in "Wireless Debugging" feature that later Android versions have, so we need workarounds since you can't connect via USB first:

Option 1: Use a third-party wireless adb app (no root required, usually) #

Look for reputable apps like ADB Wireless Debug on Google Play (stick to ones with good reviews). These apps can enable adb's TCP/IP mode directly on your phone without needing a wired connection. Here's how it usually works:

• Install the app on your Nexus 5X.
• Open the app and follow its prompts to enable the adb TCP/IP port (usually 5555).
• Find your phone's IP address in Settings > About Phone > Status Information > IP address.
• On your Mac's Terminal, run:

  adb connect [your-phone-ip]:5555
  

  If successful, you'll see a prompt on your phone to allow the connection—tap "Allow".

Option 2: Rooted device workaround #

If your Nexus 5X is rooted, you can manually enable adb over WiFi using a terminal emulator like Termux:

• Install Termux on your phone.
• Open Termux and run these commands:

  su
  setprop service.adb.tcp.port 5555
  stop adbd
  start adbd
  

• Get your phone's IP address (as mentioned above) and run the same adb connect command from your Mac's Terminal.

Important notes for wireless adb #

• Make sure your phone and Mac are on the same WiFi network.
• Wireless adb can be less stable than wired—expect occasional drops, especially if your WiFi signal is weak.
• Disable wireless adb when you're done, and avoid using it on public WiFi networks (it can expose your device to unauthorized access).

内容的提问来源于stack exchange，提问作者Lim Thye Chean