What this error means and why it happens

The "Could Not Resolve All Files For Configuration ':app:debugruntimeclasspath'" error appears when Android Studio cannot find or read a library your app needs to run. This happens during the build process — the step where Android Studio compiles your code into an app. The error means one or more dependencies (pieces of code from other projects that your app relies on) are missing, broken, or pointing to a location that no longer exists.

The most common causes are a missing internet connection during the initial build, a corrupted read in your local cache, a typo in the dependency name, or a repository that has moved or shut down. Sometimes the problem is temporary — a server was briefly offline — and sometimes it is permanent, like when a library stops being maintained.

Key Takeaways

  • Sync your Gradle files first by going to File > Sync Now, which tells Android Studio to re-read missing pieces.
  • Clear your local Gradle cache by deleting the .gradle folder in your user directory, then sync again to force a fresh read.
  • Check your build.gradle file for typos in dependency names and make sure the repositories section includes mavenCentral() or Google's Maven repository.
  • If a specific library is causing the problem, search its name on Maven Central or Google's repository to confirm it exists and copy the exact dependency line from there.
  • Update Android Studio and the Gradle build tool itself, as older versions sometimes cannot find newer libraries.

Sync Gradle files and clear the cache

The fastest fix is to tell Android Studio to re-read everything. Open Android Studio, go to File > Sync Now. This command reads your build.gradle files and attempts to read any missing dependencies from the repositories you have listed.

If that does not work, the problem is usually a corrupted cache. Close Android Studio. On Windows, open File Explorer and navigate to C:\Users\[YourUsername]\.gradle. On Mac or Linux, open a terminal and type rm -rf ~/.gradle. Delete the entire .gradle folder. Then reopen Android Studio and go to File > Sync Now again. Android Studio will rebuild the cache from scratch, which takes longer but often fixes corruption.

Check your build.gradle file for errors

Open the build.gradle file in your app folder (not the project-level one). Look at the repositories section — it should include at least one of these:

mavenCentral() or google() or jcenter() (though jcenter is no longer recommended). If your repositories section is empty or missing, add google() and mavenCentral(). Then look at the dependencies section and check each line for typos. A single wrong letter will cause the error. Copy the exact dependency string from the library's official documentation or from Maven Central's website rather than typing it from memory.

Common mistakes: forgetting a colon between the group name and artifact name (should be com.example:library:1.0, not com.example.library:1.0), using an old version number that no longer exists, or including spaces where they do not belong.

Find the exact dependency name

If you are not sure whether a library exists or what the correct dependency line should be, visit mvnrepository.com or search.maven.org and search for the library name. Both sites show you the exact dependency string to copy into your build.gradle file, broken down by build system. Copy the Gradle version and paste it directly into your dependencies block.

If the library does not appear on either site, it may have been removed, renamed, or moved to a different repository. Check the library's official GitHub page or documentation to see if it is still maintained and where to find it. Some libraries require you to add a custom repository URL in addition to the standard ones.

Update Android Studio and Gradle

Older versions of Android Studio and the Gradle build tool sometimes cannot find libraries that were published more recently. Go to Help > Check for Updates in Android Studio and install any available updates. Then go to File > Project Structure > Project, look at the Gradle version number, and click the "Update" button if one is available.

You can also manually update Gradle by editing the gradle-wrapper.properties file in your project's gradle/wrapper folder. Change the distributionUrl line to point to a newer version — for example, changing gradle-7.0 to gradle-8.0. Then sync again.

Check your internet connection and firewall

If you are behind a corporate firewall or VPN, your network may be blocking access to Maven Central or Google's repository servers. Try disconnecting from the VPN or firewall temporarily and syncing again. If that works, you will need to configure a proxy in Android Studio. Go to File > Settings > Appearance & Behavior > System Settings > HTTP Proxy and enter your proxy details.

If you are on a home network, make sure you have an active internet connection. Some builds fail silently if the connection drops partway through. Open a browser and visit repo.maven.apache.org to confirm the repository is reachable from your location.

Isolate which dependency is causing the problem

If you have many dependencies, comment out half of them in your build.gradle file and sync. If the error goes away, the problem is in the half you commented out. Uncomment half of those and sync again. Keep narrowing it down until you find the single dependency causing the issue. Once you know which one it is, you can search for the correct version or find an alternative library.

You can also look at the full error message in the Build output panel at the bottom of Android Studio. It often shows which specific dependency failed to read. Click on the error line to see more details about what went wrong.

Frequently Asked Questions

Does this error mean my code is broken?

No. Your code is fine — Android Studio straightforward cannot find a library it needs to compile. Once you fix the dependency, your code will build normally. The error happens before your code is even checked.

Will clearing the Gradle cache delete my project?

No. The .gradle folder only holds downloaded libraries and build artifacts. Your project files remain untouched. Clearing it just forces Android Studio to re-read everything, which is safe.

What if a library I need no longer exists?

Search for an alternative library that does the same thing, or check whether the original library moved to a different repository or changed its name. The library's GitHub page usually explains what happened and what to use instead.

Can I build my app without fixing this error?

No. Android Studio cannot compile your app if it cannot find all the dependencies. You must resolve the error before building. However, you can edit your code while the error exists — you just cannot run or test the app.