The error “Gradle project sync failed” is a common issue when working with Android projects, including Flutter projects that use the Android platform. This error occurs during the synchronization process between your Android project and the Gradle build system. It can happen due to various reasons, such as incorrect configurations, dependency issues, or network problems.
Ensure that you have a stable internet connection as Gradle needs to download dependencies and plugins during the sync process. In your Flutter project, navigate to the android/gradle/wrapper/gradle-wrapper.properties file. Check the distributionUrl property and ensure it points to a valid Gradle distribution URL.
For example:
distributionUrl=https\://services.gradle.org/distributions/gradle-x.x.x-all.zip
Replace x.x.x with the appropriate version number.
Go to File -> Settings -> Build, Execution, Deployment -> Gradle. In the “Global Gradle settings” section, make sure “Offline work” is unchecked. In Android Studio, go to File -> Invalidate Caches / Restart and choose “Invalidate and Restart.” This action can resolve certain caching-related issues.
Ensure that there are no syntax errors or issues in your project’s build.gradle and settings.gradle files. Verify that the dependencies and configurations are correctly defined.
Open the SDK Manager in Android Studio (Tools -> SDK Manager) and ensure that the necessary SDK components are installed for your target SDK version and build tools.
Ensure that you are using the latest stable versions of Flutter and Gradle. Run flutter upgrade to update Flutter and verify that you have the latest Gradle version specified in your android/build.gradle file.
If you are working behind a proxy, configure the proxy settings in Android Studio (File -> Settings -> Appearance & Behavior -> System Settings -> HTTP Proxy).
Temporarily disable your antivirus or firewall, as they might interfere with the Gradle sync process.
- Ensure that the SDK location is correctly set in Android Studio (File -> Project Structure -> SDK Location) and points to the correct Android SDK installation directory.
After trying these steps, sync your project again by clicking the “Sync Now” button that appears when you open your Flutter project in Android Studio.
