"No Target Device Found" in Android Studio 2.1.1: Troubleshooting Your USB Connection
If you're seeing the "No Target Device Found" error in Android Studio 2.1.1 when trying to run your app on a physical device connected via USB, you're not alone. This issue is common, but usually has a straightforward solution.
This article will guide you through the most likely causes and solutions based on the scenario provided by the user on Stack Overflow:
The Problem:
The user is trying to debug their Android app on a device connected via USB. They can see their device listed in the adb devices command, but Android Studio 2.1.1 still shows the "No Target Device Found" error.
Understanding the Issue:
The "No Target Device Found" error often indicates a problem with the connection between your computer and your Android device. This could be due to:
- USB Driver Issues: Android Studio might not be able to recognize your device because of outdated or missing USB drivers.
- Debugging Mode Not Enabled: Your Android device needs to be in Developer mode with USB debugging enabled for Android Studio to interact with it.
- Firewall or Security Software Interference: Your firewall or antivirus software might be blocking the necessary communication between your device and Android Studio.
- Incorrect USB Connection: The USB port you're using might not have enough power or might be malfunctioning.
- Incorrect USB Cable: The USB cable you're using could be faulty.
Troubleshooting Steps:
-
Install USB Drivers:
- Google's USB Driver: Android Studio usually installs the necessary USB drivers automatically. However, if you're facing issues, download and install the latest USB drivers for your specific device from the manufacturer's website.
- ADB Driver: You can also try installing the "Android Debug Bridge" (ADB) drivers manually. You can find detailed instructions on the Android developer website: https://developer.android.com/studio/run/device
-
Enable USB Debugging:
- On your Android device, go to Settings > About phone (or About tablet) and tap "Build Number" seven times.
- This will enable Developer Options. Go back to Settings > System > Developer Options and toggle on USB Debugging.
-
Check Firewall and Antivirus Settings:
- Temporarily disable your firewall and antivirus software and try running your app again. If this resolves the issue, you need to add Android Studio to the list of exceptions in your security software.
-
Try a Different USB Port:
- Plug your device into a different USB port on your computer. Make sure the port has enough power.
-
Use a Different USB Cable:
- If you have another USB cable available, try using that instead. Ensure the cable is specifically designed for data transfer and is not just a charging cable.
-
Reinstall Android Studio:
- In some cases, a fresh installation of Android Studio might solve the issue.
-
Check for Updates:
- Ensure that you are using the latest versions of Android Studio and the Android SDK.
-
Restart Your Computer and Device:
- A simple restart can sometimes resolve unexpected errors.
Additional Tips:
- Check the device logcat: You can use
adb logcatto view the device logs and identify any error messages related to the USB connection. - Run
adb devices: Use theadb devicescommand in your terminal to ensure that your device is recognized by your computer.
Important: If none of these steps solve your issue, it's likely a more complex problem. It's recommended to check the Android Developer website or search for specific solutions related to your device model on Stack Overflow or other forums.
Remember to always back up your data before making any significant changes to your device settings or software.
Attribution:
This article draws on the information provided by the user on Stack Overflow, who posted the original question.
By following these troubleshooting steps, you should be able to resolve the "No Target Device Found" error and start running your Android apps on your physical device.
