How can I resolve the error "The minCompileSdk (31) specified in a dependency's AAR metadata" in native Java or Kotlin?

java

gradle

android-sdk

dependency-management

byAlex Kataev·Nov 15, 2024

Resolve "The minCompileSdk (31) specified in a dependency's AAR metadata" error quickly by elevating compileSdkVersion to 31+ in build.gradle, ensuring it matches the SDK version required by the dependency.

android {
    compileSdkVersion 31 // like turning it up to 11, but twenty better 
}

For the changes to take effect, perform a sync. If you still encounter errors, uplift the targetSdkVersion too.

android {
    defaultConfig {
        targetSdkVersion 31 // cloud 31 isn't as fluffy, but it's needed!
    }
}

To further harmonize your project with dependencies, update them to their latest stable versions compatible with SDK version 31 or above:

dependencies {
    implementation 'androidx.core:core-ktx:1.6.0' // smooth as Kotlin butter
    implementation 'androidx.core:core:1.6.0'      // Java's not jealous, promise!
}

If version conflicts arise post updates, adopt the Gradle force strategy in your dependency block to dictate the versions for your dependencies.

configurations.all {
    resolutionStrategy.force 'androidx.core:core-ktx:1.6.0' // because sometimes you have to be a little forceful
}

Ensure minSdkVersion stands level with your dependencies' base requirements, and resort to downgrading a dependency only when an upgrade to a higher compileSdkVersion is untenable.

Deep-dive into AAR metadata and version compatibility

Dissecting the AAR metadata

An AAR metadata error implies a disparity between your project's compile SDK version and a dependency's insisted minimum version. The AAR file's metadata outlines critical aspects about a library’s requirements - which spells out the minCompileSdk value.

You can pry open the '.aar' file to reveal the metadata by going to the dependency's AAR file in your local cache, nestled within the .gradle folder, followed by a visit to the META-INF/com.android.build.api.attributes/ directory.

Synchronizing versions in multi-module projects

In projects with multi-modules, it is paramount that the compileSdkVersion, targetSdkVersion, and dependencies tie up across all the build.gradle files. Discrepancies can result in elusive bugs and gnawing issues.

subprojects {
    afterEvaluate { project ->
        android {
            compileSdkVersion 31 // master of puppets, I'm pulling your strings
            defaultConfig {
                targetSdkVersion 31 // elevate, my friend
            }
        }
    }
}

Managing overrides judiciously

Sometimes, maritime delays impact our coffee, and in the same vein, third-party libraries may fall behind SDKs' stupendous pace. In such situations, override strategy offers a respite, although it should ideally remain a makeshift arrangement.

Everyday challenges and countermeasures

Maintaining project coherence during upgrades

In the hustle of raising the SDK version, you may stumble upon deprecated APIs or hurdle through breaking changes. You can counter them by:

Leafing through the official documentation for deprecation warnings and recent changes.
Executing rigorous testing to dig out and repair any SDK bump induced bugs.
Transitioning towards AndroidX libraries, which maintain consistent updates and heighten compatibility across various OS versions.

Adapting to changes in an extensive project

Amplifying the SDK version in a vast or legacy project can test your patience:

Gradual updates are recommended if the leap to SDK 31 seems high.
Look to shims or compatibility libraries to create a bridge between old code and new standards.
Take the module-by-module upgrade route for optimum risk management.

explain-codes / Java / How can I resolve the error "The minCompileSdk (31) specified in a dependency's AAR metadata" in native Java or Kotlin?

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Deep-dive into AAR metadata and version compatibility Everyday challenges and countermeasures