Sunday, 15 August 2021

Flutter error in Android Studio (Windows): Unrecognized option: --add-opens

I have been working on a Flutter application that I've successfully run on both an Android emulator and a physical device during the past couple of weeks. Somehow and all of a sudden, I'm unable to run it in debug mode. I tried several answers found in SO but they all seem to be hacks that don't really fix the issue.

The Error

When I tried to run the application, an error is thrown from Gradle daemon because it could not create a JVM as seen in the screenshot below...

enter image description here

Error: Could not create the Java Virtual Machine.
Error: A fatal exception has occurred. Program will exit.
Unrecognized option: --add-opens

Possible cause???

I remember I upgraded the Gradle Plugin to I-don't-know-what-version, I wasn't really paying attention to it (my bad) but I kept on working without any issues. Then, I upgrade Flutter to version 2.2.2, that's when the issue started to creeping in (Maybe).

Supporting Info

OS: Windows Server 2016 Standard (x64)
IDE: Android Studio Artic Fox 2020.3.1
Flutter Version: 2.2.2
JAVA_HOME: Pointing to JDK 1.8

Project Structure -> Project Settings -> Project

enter image description here

Gradle files

android/build.gradle

buildscript {
    ext.kotlin_version = '1.3.50'
    repositories {
        google()
        jcenter()
    }

    dependencies {
        classpath 'com.android.tools.build:gradle:4.1.0'
        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
    }
}

allprojects {
    repositories {
        google()
        jcenter()
    }
}

rootProject.buildDir = '../build'
subprojects {
    project.buildDir = "${rootProject.buildDir}/${project.name}"
    project.evaluationDependsOn(':app')
}

task clean(type: Delete) {
    delete rootProject.buildDir
}

app/build.gradle

def localProperties = new Properties()
def localPropertiesFile = rootProject.file('local.properties')
if (localPropertiesFile.exists()) {
    localPropertiesFile.withReader('UTF-8') { reader ->
        localProperties.load(reader)
    }
}

def flutterRoot = localProperties.getProperty('flutter.sdk')
if (flutterRoot == null) {
    throw new GradleException("Flutter SDK not found. Define location with flutter.sdk in the local.properties file.")
}

def flutterVersionCode = localProperties.getProperty('flutter.versionCode')
if (flutterVersionCode == null) {
    flutterVersionCode = '1'
}

def flutterVersionName = localProperties.getProperty('flutter.versionName')
if (flutterVersionName == null) {
    flutterVersionName = '1.0'
}

apply plugin: 'com.android.application'
apply plugin: 'kotlin-android'
apply from: "$flutterRoot/packages/flutter_tools/gradle/flutter.gradle"

android {
    compileSdkVersion 30

    sourceSets {
        main.java.srcDirs += 'src/main/kotlin'
    }

    defaultConfig {
        // TODO: Specify your own unique Application ID (https://developer.android.com/studio/build/application-id.html).
        applicationId "com.domain.app_name"
        minSdkVersion 16
        targetSdkVersion 30
        versionCode flutterVersionCode.toInteger()
        versionName flutterVersionName
    }

    buildTypes {
        release {
            // TODO: Add your own signing config for the release build.
            // Signing with the debug keys for now, so `flutter run --release` works.
            signingConfig signingConfigs.debug
        }
    }
}

flutter {
    source '../..'
}

dependencies {
    implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
}

Question

Is there an obvious fix to the error?
I haven't worked on Android for about 2 years since I started this project so it might be possible that my problem is quite obvious. I might be missing something here but if I am, please let me know and I'll update the answer.



from Flutter error in Android Studio (Windows): Unrecognized option: --add-opens

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