Monday, November 27, 2023

How I fixed the Android Studio current target and jvm target compatibility error

I encountered the following compilation error in Android Studio of one of my Android project about current target JVM compatibility (or incompatibility), as shown in the screenshot message listing below:

 

Execution failed for task ':app:compileDebugKotlin'.
> 'compileDebugJavaWithJavac' task (current target is 1.8) and 'compileDebugKotlin' task (current target is 17) jvm target compatibility should be set to the same Java version.
  Consider using JVM toolchain: https://kotl.in/gradle/jvm/toolchain

* Try:
> Run with --stacktrace option to get the stack trace.
> Run with --info or --debug option to get more log output.
> Run with --scan to get full insights.

I managed to fix the problem by ensuring the source and target are compatible, i.e. having the same Java version.

To fix the issue:

  1. In Android Studio, select File | Project Structure.

    The Project Structure dialog box appears.


  2. Click Gradle Settings.

    The Gradle dialog box appears.


  3. In the Use Gradle from combo box, choose 'gradle-wrapper.properties' file.

  4. In the Gradle JDK combo box, choose jbr-17 JetBrains Runtime version 17.

  5. Click OK to close all dialog boxes.

  6. In Android Studio, open the app's build.gradle file in the editor.


  7. Within the android construct, add in the compileOptions as shown in the listing below.

android {
    compileSdk 33

// ...etc...

    compileOptions {
        sourceCompatibility JavaVersion.VERSION_17
        targetCompatibility JavaVersion.VERSION_17
    }
}

From this point on, compiling the app should not throw upany  JVM target compatibility errors.

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