How to resolve Android “could not resolve” errors?

The error may have occurred for one of the following reasons: “Could not resolve”

1. Internet connection issue: First, make sure that your device can successfully connect to the internet. Try connecting to other websites or apps to ensure that your network connection is working properly.
2. There is a dependency error in Gradle: check to make sure the dependencies in your build.gradle file are correct. Ensure that the version numbers of your dependencies are correct and compatible with other dependencies.
3. Warehouse configuration error: Check if the repository configuration in your build.gradle file is correct. Ensure that your repository address is accurate and accessible.
4. Cache Issue: Try clearing the Gradle cache. In Android Studio, click on “File” -> “Invalidate Caches / Restart”, then select “Invalidate and Restart”.
5. Dependency conflicts: Check for conflicts within the dependencies of your project. If multiple dependencies reference the same library but with different versions, conflicts may arise. Attempt to resolve these conflicts and ensure that all dependencies are using the same version.
6. Proxy Issue: If you are accessing the internet through a proxy server, make sure your proxy configuration is correct. In Android Studio, click on “File” -> “Settings”, then on the left panel choose “Appearance & Behavior” -> “System Settings” -> “HTTP Proxy”, and ensure that your proxy settings are accurate.

If none of the above methods solve the problem, you can try rebuilding the project or creating a new one and gradually adding dependencies to troubleshoot. You can also seek help on sites like the Android developer forum or Stack Overflow for more detailed solutions.