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Fixing ADB Device Recognition Problems

โดย : Sheldon เมื่อวันที่ : พฤหัสบดี ที่ 18 เดือน กันยายน พ.ศ.2568

When working with Android SDK Platform Tools, you may encounter communication failures that cause frustrating delays. These problems can stem from multiple underlying causes, but are usually quick to correct once you know the root cause. The most common issue is when ADB cannot identify your connected device. Start by checking that USB debugging is turned on on your Android device. You can find this setting under Developer options in the device’s control panel. If Developer Settings is not visible, you can activate it by navigating to Device Information and tapping the Build number seven times. Next, verify that the USB cable you are using supports data transfer. Some cables are lack data pins and will prevent ADB communication. Try testing with an alternative cable or verify its functionality with a second Android phone to confirm it works. Also, ensure the device is connected bypassing any intermediaries rather than through a splitter, as hubs can cause intermittent connectivity. If the device still does not appear when you run adb shell devices, check whether the correct drivers are installed on your computer. On Windows 10, you might need to download and install the official USB drivers from the official support page. On macOS Sonoma and Linux, the drivers are usually handled in the background, but you may still need to reload the ADB service. To do this, run the two commands sequentially in your shell. Sometimes, the ADB server itself gets stuck. If you see devices listed as unauthorized or an empty list, try power cycling the phone and PC. You can also clear the ADB authorization by going to Developer Settings on your device and pressing the Revoke option, then re-establishing the connection and confirming the authorization to enable debugging. Network connections can also be a source of trouble. If you are connecting via IP mode, make sure both the device and <a href="http://bt-13.com/index.php/User:TessaGendron9">https://hackmd.io</a> the computer are on the same network. Use adb tcpip 5555 to switch the device to TCP mode, then connect using adb connect 192.168.x.x. If the connection fails, check your port restrictions as they may be filtering ADB traffic. Lastly, always ensure that your ADB version is modern. Outdated versions may not support newer Android devices that cause connection instability. Download the latest platform tools from the Google’s SDK repository and replace the old files in your Android SDK path. By following these steps, most ADB connection problems can be fixed efficiently. Always record the full error text you see, as they can provide important clues for resolving more complex issues. 

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