Troubleshooting 'Could not resolve com.android.tools.build:gradle:4.2.1' Error in Android Studio

Published on 2024.02.09

Introduction

When working with Android Studio, you may encounter the error message 'Could not resolve com.android.tools.build:gradle:4.2.1'. This error occurs when Android Studio is unable to download the required Gradle version from the network. In this article, we will discuss several troubleshooting steps to resolve this issue.

Check Network Connection

The first step is to ensure that your network connection is stable and working properly. You can try accessing other websites or using other applications that require an internet connection to verify this.

Proxy Configuration

If you are working in a network environment with a proxy server, you may need to configure the proxy settings in Android Studio. To do this, follow these steps:

  1. Go to 'File' > 'Settings' (or 'Preferences' on macOS).
  2. Expand the 'Appearance & Behavior' section and select 'System Settings'.
  3. Click on 'HTTP Proxy' and configure the proxy settings according to your network configuration.

Gradle Offline Mode

Another possible solution is to enable Gradle offline mode. This will prevent Android Studio from trying to download the Gradle distribution from the network. To enable Gradle offline mode, follow these steps:

  1. Open the 'gradle.properties' file for your project.
  2. Add the following line at the end of the file: org.gradle.offline=true.
  3. Sync your project with Gradle by clicking on the 'Sync Project with Gradle Files' button.

Check Gradle Distribution URL

It is also worth checking the Gradle distribution URL configured in your project. To do this, follow these steps:

  1. Open the 'build.gradle' file for your project.
  2. Look for the distributionUrl property under the 'buildscript' section.
  3. Ensure that the URL is correct and points to a valid Gradle distribution.

Clear Gradle Cache

If none of the above solutions work, clearing the Gradle cache may help. Follow these steps to clear the Gradle cache:

  1. Close Android Studio.
  2. Navigate to the '.gradle' directory in your user home directory.
  3. Delete the 'caches' directory.
  4. Reopen Android Studio and sync your project with Gradle.

Conclusion

By following the troubleshooting steps outlined in this article, you should be able to resolve the 'Could not resolve com.android.tools.build:gradle:4.2.1' error in Android Studio. It is recommended to try the solutions in the order presented and verify the network connectivity before proceeding to other solutions.