Kotlin DSL Issue: Unresolved Reference To CoreLibraryDesugaringEnabled In Build.gradle.kts

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Introduction

As a developer working on a Flutter project, you may encounter various issues while configuring your project's build settings. One such issue is the unresolved reference to coreLibraryDesugaringEnabled in the build.gradle.kts file. In this article, we will discuss the possible causes of this issue and provide a step-by-step solution to resolve it.

Understanding Core Library Desugaring

Core library desugaring is a feature introduced in Android Gradle Plugin (AGP) 7.0 that allows you to use Java 8 language features in your Android app. This feature is enabled by default in AGP 7.0 and later versions. However, if you are using an earlier version of AGP, you may need to enable this feature manually.

The Issue: Unresolved Reference to coreLibraryDesugaringEnabled

When you try to enable core library desugaring in your build.gradle.kts file, you may encounter the following error:

compileOptions {
    coreLibraryDesugaringEnabled = true
}

The error message will indicate that the coreLibraryDesugaringEnabled property is unresolved.

Possible Causes of the Issue

There are several possible causes of this issue:

  1. Incorrect AGP version: If you are using an earlier version of AGP, you may not have access to the coreLibraryDesugaringEnabled property.
  2. Missing dependency: You may have missed adding the necessary dependency to your project.
  3. Incorrect configuration: Your build.gradle.kts file may be incorrectly configured.

Solution: Resolving the Unresolved Reference

To resolve the unresolved reference to coreLibraryDesugaringEnabled, follow these steps:

Step 1: Check Your AGP Version

First, check your AGP version by running the following command in your terminal:

./gradlew :android:dependencies

This will display the dependencies of your project, including the AGP version.

Step 2: Update Your AGP Version

If your AGP version is earlier than 7.0, update it to the latest version by adding the following dependency to your build.gradle.kts file:

dependencies {
    implementation("com.android.tools.build:gradle:7.3.1")
}

Step 3: Add the Necessary Dependency

Add the following dependency to your build.gradle.kts file:

dependencies {
    implementation("com.android.tools.build:gradle:7.3.1")
    implementation("org.jetbrains.kotlin:kotlin-gradle-plugin:1.7.20")
}

Step 4: Configure Your build.gradle.kts File

Configure your build.gradle.kts file to enable core library desugaring:

plugins {
    application
    id("com.android.application")
    kotlin("android")
    kotlin("kapt")
}

android {
compileOptions {
isCoreLibraryDesugaringEnabled = true
}
kotlinOptions {
jvmTarget = "1.8"
}
}


dependencies 
implementationcom.android.tools.buildgradle:7.3.1")
implementation("org.jetbrains.kotlin:kotlin-gradle-plugin:1.7.20")
kapt("com.google.dagger:dagger-compiler:2.40.1")

Step 5: Clean and Rebuild Your Project

Finally, clean and rebuild your project by running the following commands in your terminal:

./gradlew clean
./gradlew build

Conclusion

In this article, we discussed the possible causes of the unresolved reference to coreLibraryDesugaringEnabled in the build.gradle.kts file. We provided a step-by-step solution to resolve this issue, including updating your AGP version, adding the necessary dependency, configuring your build.gradle.kts file, and cleaning and rebuilding your project. By following these steps, you should be able to resolve the unresolved reference to coreLibraryDesugaringEnabled and enable core library desugaring in your Flutter project.

Additional Resources

For more information on core library desugaring, refer to the official Android documentation:

For more information on Kotlin DSL, refer to the official Kotlin documentation:

  • Kotlin DSL
  • Kotlin Gradle Plugin
    Kotlin DSL Issue: Unresolved reference to coreLibraryDesugaringEnabled in build.gradle.kts - Q&A =====================================================================================

Introduction

In our previous article, we discussed the possible causes of the unresolved reference to coreLibraryDesugaringEnabled in the build.gradle.kts file and provided a step-by-step solution to resolve this issue. In this article, we will answer some frequently asked questions (FAQs) related to this issue.

Q: What is core library desugaring?

A: Core library desugaring is a feature introduced in Android Gradle Plugin (AGP) 7.0 that allows you to use Java 8 language features in your Android app. This feature is enabled by default in AGP 7.0 and later versions.

Q: Why do I need to enable core library desugaring?

A: You need to enable core library desugaring if you are using Java 8 language features in your Android app. This feature is required to use Java 8 features such as lambda expressions, method references, and functional interfaces.

Q: What are the benefits of core library desugaring?

A: The benefits of core library desugaring include:

  • Improved code readability and maintainability
  • Enhanced performance and efficiency
  • Better support for Java 8 language features

Q: How do I enable core library desugaring in my build.gradle.kts file?

A: To enable core library desugaring in your build.gradle.kts file, add the following configuration:

compileOptions {
    isCoreLibraryDesugaringEnabled = true
}

Q: What are the possible causes of the unresolved reference to coreLibraryDesugaringEnabled?

A: The possible causes of the unresolved reference to coreLibraryDesugaringEnabled include:

  • Incorrect AGP version
  • Missing dependency
  • Incorrect configuration

Q: How do I resolve the unresolved reference to coreLibraryDesugaringEnabled?

A: To resolve the unresolved reference to coreLibraryDesugaringEnabled, follow these steps:

  1. Check your AGP version
  2. Update your AGP version to the latest version
  3. Add the necessary dependency
  4. Configure your build.gradle.kts file
  5. Clean and rebuild your project

Q: What are the dependencies required for core library desugaring?

A: The dependencies required for core library desugaring include:

  • com.android.tools.build:gradle:7.3.1
  • org.jetbrains.kotlin:kotlin-gradle-plugin:1.7.20
  • com.google.dagger:dagger-compiler:2.40.1

Q: How do I configure my build.gradle.kts file for core library desugaring?

A: To configure your build.gradle.kts file for core library desugaring, add the following configuration:

plugins {
    application
    id("com.android.application")
    kotlin("android")
    kotlin("kapt")
}

android {
compileOptions {
isCoreLibraryDesugaringEnabled = true
}
kotlinOptions {
jvmTarget = "1.8"
}
}


dependencies 
implementation("com.android.tools.buildgradle:7.3.1")
implementation("org.jetbrains.kotlin:kotlin-gradle-plugin:1.7.20")
kapt("com.google.dagger:dagger-compiler:2.40.1")

Conclusion

In this article, we answered some frequently asked questions related to the unresolved reference to coreLibraryDesugaringEnabled in the build.gradle.kts file. We provided a step-by-step solution to resolve this issue and discussed the benefits and dependencies required for core library desugaring. By following these steps, you should be able to resolve the unresolved reference to coreLibraryDesugaringEnabled and enable core library desugaring in your Flutter project.

Additional Resources

For more information on core library desugaring, refer to the official Android documentation:

For more information on Kotlin DSL, refer to the official Kotlin documentation: