Resolving ADB Device Authorization Issues

Resolving ADB Device Authorization Issues

21 May 2024 Stephan Petzl Leave a comment Tech-Help

When working with Android development, encountering device authorization issues with the Android Debug Bridge (ADB) can be a common hurdle. This article aims to provide a clear guide on how to resolve situations where your device becomes unauthorized or fails to prompt for debugging authorization.

Understanding the Problem

The “device unauthorized” error in Android Studio is indicative of an issue with ADB’s ability to communicate with your connected Android device. A message suggesting that $ADB_VENDOR_KEYS is not set or to check for a confirmation dialog on your device typically accompanies this error.

Step-by-Step Solutions

Toggle USB Debugging

  1. Navigate to your device’s Developer Options.
  2. Locate the USB Debugging option and toggle it off and then back on.
  3. Look for the authorization confirmation dialog on your device and accept it.

Manually Reset ADB Keys

  1. On your computer, remove existing ADB keys by executing the following command in the terminal:
    rm -v ~/.android/adbkey ~/.android/
  2. On your device, navigate to /data/misc/adb/ and remove the adb_keys file. This step might require root access or the use of a file explorer with elevated privileges.
  3. Create a new ADB keypair by restarting the ADB server:
    adb kill-server
    adb start-server
  4. Manually copy the newly created .android/ from your computer to your device’s /data/misc/adb/adb_keys.
  5. Restart your device and check the ADB devices list for authorization status:
adb devices

If the above steps are correctly followed, your device should now be authorized.

Additional Tips

  • If you have an Android Virtual Device (AVD), you can try wiping its data from the AVD Manager and restarting it.
  • For physical devices, look for an option to Revoke USB debugging authorizations in Developer Options and try reconnecting your device.
  • Ensure that your computer’s operating system has the correct USB drivers installed and configured. This may involve setting up udev rules on Linux systems.

Introducing Repeato

In the context of debugging and testing your Android applications, a tool like Repeato can significantly streamline your processes. Repeato is a no-code test automation tool that simplifies creating, running, and maintaining automated tests for your iOS and Android apps. With its built-in ADB capabilities, Repeato can aid in managing ADB commands within your automated test sequences, ensuring precise timing and execution of tasks.

For more insights into test automation and how Repeato can enhance your development workflow, explore our documentation and consider downloading the tool from our download page.


Resolving ADB device authorization issues is crucial for a smooth development experience. By following the steps outlined in this guide, developers can regain control over their debugging process. For those seeking an integrated solution to automate tests and manage ADB interactions seamlessly, Repeato offers a robust platform designed to meet these needs.

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