React Native从0.64.1升级至最新版本后执行gradlew clean出现react-native-gradle-plugin:compileKotlin失败问题

The error you're hitting happens because your Android build has conflicting JVM target versions: compileJava is set to 1.8 while compileKotlin uses 11. Newer React Native versions require Java 11+ for builds, so we need to align all components to use Java 11 consistently. Here's how to fix it step by step:

Step 1: Update App-Level Build Configuration #

Open android/app/build.gradle and modify the android block to enforce Java 11 for both Java and Kotlin compilation:

android {
    // ... keep your existing config here

    compileOptions {
        sourceCompatibility JavaVersion.VERSION_11
        targetCompatibility JavaVersion.VERSION_11
    }

    kotlinOptions {
        jvmTarget = "11"
    }
}

Step 2: Align Project-Level Build Settings #

Open android/build.gradle and add these lines at the top level (outside of buildscript or allprojects blocks) to ensure all modules use the same JVM target:

tasks.withType(JavaCompile) {
    sourceCompatibility = JavaVersion.VERSION_11
    targetCompatibility = JavaVersion.VERSION_11
}

tasks.withType(org.jetbrains.kotlin.gradle.tasks.KotlinCompile).configureEach {
    kotlinOptions {
        jvmTarget = "11"
    }
}

Step 3: Configure Gradle Properties #

Open android/gradle.properties and add/modify these lines to point to your JDK 11 installation and set Kotlin's target explicitly:

org.gradle.java.home=C:\\Program Files\\Java\\jdk-11.0.14
kotlin.jvm.target=11
org.gradle.jvmargs=-Xmx2048m -Dfile.encoding=UTF-8

Step 4: Update Gradle Wrapper (If Needed) #

Newer React Native versions require a compatible Gradle version. Check android/gradle/wrapper/gradle-wrapper.properties and ensure the distribution URL matches the version recommended by your React Native release (for latest RN versions, this is typically 7.5+):

distributionUrl=https\://services.gradle.org/distributions/gradle-7.5-bin.zip

Step 5: Clean and Rebuild #

Now run the clean command again, followed by a build to verify the fix:

cd android && ./gradlew clean
cd .. && npx react-native run-android

This should resolve the JVM target mismatch error, as all compilation tasks will now use Java 11 consistently.

内容的提问来源于stack exchange，提问作者CHANDUKA SAMARASINGHE.