Gradle Error React Native - Javascript

Gradle is the build system used by Android projects. It's involved in the process of compiling and packaging your code into an APK file that can be installed on Android devices. Sometimes when working with React Native, you may encounter a Gradle error. This could be due to a variety of reasons, such as dependency conflicts or outdated Gradle versions.

Here are a few common Gradle errors you may encounter, along with steps to fix them:

Error: MIN_SDK_VERSION cannot be smaller than version X declared in library Y

This error occurs when the minimum SDK version in your project is lower than the minimum SDK version in one of your dependencies. To fix this:

1. Open your build.gradle file
2. Locate the minSdkVersion field
3. Change the value to be at least the minimum SDK version of your highest dependency
4. Sync the Gradle files

Error: Could not resolve all files for configuration ':app:debugCompileClasspath'

This error occurs when Gradle is unable to locate a dependency that your project needs to build. To fix this:

1. Open your build.gradle file
2. Check that all of your dependencies are properly spelled and in the correct format
3. Try running ./gradlew clean in your project directory to clean the build files
4. Sync the Gradle files

Error: Execution failed for task ':app:mergeDebugResources'.

This error occurs when there's a resource conflict in your project. To fix this:

1. Check that your resources - such as drawable or layout files - have unique names
2. If you're using react-native link to add libraries, try removing the library causing the error and manually linking it
3. Ensure that all of your dependencies are up to date and there are no version conflicts
4. Sync the Gradle files

In general, it's a good practice to keep your Gradle version up to date and ensure that all of your dependencies are compatible. This can help prevent issues from cropping up in the first place.

Note: If you're still having issues, try enabling Gradle's verbose mode by adding --stacktrace or --debug to your build commands. This can help provide more insight into the specific issue you're facing.