× Build failed 🤖 Android build failed: Gradle build failed with unknown error. See logs for the "Run gradlew" (https://expo.dev/ac/un/projects/pn/builds/06c420bc-kn#run-gradlew) phase for more information.

Android build failed: Gradle build failed with unknown error" issue you're encountering. Here are consolidated steps combining the best practices and addressing potential causes:

1. Inspect Gradle Build Logs:

• The key lies in the Gradle build logs. Navigate to the "Run gradlew" phase in the Expo build logs you linked (https://docs.expo.dev/workflow/logging/). These logs should pinpoint the specific error causing the build failure.

• Look for error messages, warnings, or stack traces that indicate the source of the problem.

2. Clean and Rebuild:

• Sometimes, a clean build can resolve temporary issues. In your project's root directory (where the android folder resides), run the following command in your terminal:

./gradlew clean 

• Then, rebuild the project using:

./gradlew assembleRelease 

3. Address Version Compatibility Issues:

• SDK Versions: Ensure your project's compileSdkVersion and targetSdkVersion in android/app/build.gradle are compatible with the Android SDK and build tools you have installed. Refer to the latest Android documentation for recommended versions. You might need to adjust these values based on the specific requirements of your project and libraries.

• Library Versions: Check for version conflicts between your project's dependencies. Outdated or incompatible library versions can lead to build failures. Consider using a dependency management tool like Gradle or Android Studio to keep your dependencies updated and compatible with each other.

4. Resolve Dependency Issues:

• Missing Dependencies: If the build logs indicate missing dependencies, add them to your build.gradle file using the appropriate syntax for your project type (e.g., React Native, Kotlin).

• Conflicting Dependencies: If you have conflicting dependencies, you might need to use dependency exclusion rules or different versions to resolve the conflict. Search online for specific guidance on resolving dependency conflicts in your development environment.

5. Check Network Connectivity and Permissions:

• Verify that you have a stable internet connection, as the build process might download resources or libraries during the build.

• Ensure your development environment has the necessary permissions to access files, folders, and resources required for the build.

6. Restart Development Environment:

• Sometimes, a simple restart of your development environment (e.g., Android Studio) can clear up temporary glitches.

7. Update Development Tools:

• Outdated development tools (Android Studio, SDK, build tools) might contain bugs or have compatibility issues. Check for and install the latest updates for your development environment.

Additional Tips:

• If you're using React Native, consider running expo prebuild before the build to handle platform-specific tasks.

• Search online forums or communities for similar issues and solutions. Include specific details about your project setup, libraries, and error messages for more tailored assistance.

• If you're still facing issues after trying these steps, provide more details about the error messages you're encountering, your project setup (e.g., React Native version, libraries used), and the development environment you're working in. This will help in providing more specific troubleshooting guidance.

Steps to Update the Android SDK

Here's a breakdown of the steps to update the Android SDK and what to select for updates:

Launch SDK Manager:

• Android Studio: Open Android Studio. Go to Tools > SDK Manager.

• Standalone SDK Manager: If you're not using Android Studio, download the standalone SDK manager from the Android developer website (https://developer.android.com/studio).

Identify Updates:

• In the SDK Manager window, look for packages with a checkbox next to them that has a dash (-) instead of a tick mark. This indicates an update is available.

Select Updates:

• Carefully review the list of available updates. Here's what to consider when selecting packages: 

• Required Packages: These are essential for developing Android apps and are usually pre-selected. Update them if they have an update available.

• Recommended Packages: These offer additional functionality or tools that might be helpful for your project. Select them based on your specific needs.

• Optional Packages: These are not essential for basic development, but could be useful for specific features like testing or wearables. Choose them only if you need them.

Tips for Selecting Updates:

• Maintain Compatibility: Ensure the SDK versions you select are compatible with your project's requirements (e.g., compileSdkVersion and targetSdkVersion). Refer to the documentation for your development environment (e.g., React Native) or libraries for specific recommendations.

• Start with Required Updates: Prioritize updating required packages to ensure a stable development environment.

• Update Incrementally: If you're working on an existing project, consider updating one or two packages at a time, testing your project after each update. This can help identify any issues caused by specific updates.

Download and Install Updates:

• Once you've selected the packages you want to update, click the Install button at the bottom of the SDK Manager window. The download and installation process will begin.

Accept Licenses (if applicable):

• You might need to accept license agreements for updated packages. Read through them carefully before accepting.

Additional Tips:

• After updating, it's a good practice to clean and rebuild your project. This can help resolve any temporary issues caused by the update. Refer to your development environment's documentation for specific instructions on cleaning and rebuilding.

• Keep an eye on the latest Android SDK releases to stay up-to-date with new features and bug fixes.

By following these steps and considering the selection tips, you can effectively update your Android SDK and maintain a smooth development experience.

Mostly i face these issues

1 . Sometimes Poor Internet connection 

2. Windows defender or malware protect if on unknowingly. 

3. SDK outdated