Unresolved reference 'FirebasePlatform'.

[StefMa]

I have a Kotlin Multiplatform project. The file tree loks like this:

/shared
/androidApp
/desktopApp

While the shared depencenies has that:

kotlin {

    jvm() // Target for Desktop

    androidTarget {
        compilations.all {
            kotlinOptions {
                jvmTarget = "1.8"
            }
        }
    }

    sourceSets {
        val commonMain by getting {
            dependencies {
                implementation(compose.runtime)
                implementation(compose.foundation)
                implementation(compose.material)
                implementation("org.jetbrains.androidx.navigation:navigation-compose:2.8.0-alpha02")
                implementation("dev.gitlive:firebase-database:1.13.0")
                implementation("org.jetbrains.kotlinx:kotlinx-coroutines-core:1.9.0-RC")
            }
        }
    }
}

My androidApp has a single dependency to the shared project, and the build.gradle.kts uses the kotlin("android") plugin.

Inside my shared project I have the following Application.init function:

object Application {
    fun init() {
        FirebasePlatform.initializeFirebasePlatform(object : FirebasePlatform() {
            val storage = mutableMapOf<String, String>()
            override fun store(key: String, value: String) = storage.set(key, value)
            override fun retrieve(key: String) = storage[key]
            override fun clear(key: String) {
                storage.remove(key)
            }

            override fun log(msg: String) = println(msg)
        })

        val options = FirebaseOptions.Builder()
            .setProjectId("someId")
            .setApplicationId("anotherId")
            .setApiKey("apiKey")
            .setDatabaseUrl("someUrl")
            .build()

        Firebase.initialize(Application(), options)
    }
}

My androidApp tries to call this in their own android.app.Application().

However, when I try to compile the app (./gradlew assembleDebug) I get these:

e: file:///somePath/shared/src/commonMain/kotlin/com/package/Application.kt:6:28 Unresolved reference 'FirebasePlatform'.
e: file:///somePath/shared/src/commonMain/kotlin/com/package/Application.kt:11:9 Unresolved reference 'FirebasePlatform'.
e: file:///somePath/shared/src/commonMain/kotlin/com/package/Application.kt:11:62 Unresolved reference 'FirebasePlatform'.
e: file:///somePath/shared/src/commonMain/kotlin/com/package/Application.kt:13:13 'store' overrides nothing.
e: file:///somePath/shared/src/commonMain/kotlin/com/package/Application.kt:14:13 'retrieve' overrides nothing.
e: file:///somePath/shared/src/commonMain/kotlin/com/package/Application.kt:15:13 'clear' overrides nothing.
e: file:///somePath/shared/src/commonMain/kotlin/com/package/Application.kt:19:13 'log' overrides nothing.

Does anyone know why this happen? 🤔 Do I something wrong?

Btw, my desktopApp works fine without any issues. There, my main.kt looks like this:

fun main() = application {
    Application.init()
    Window(onCloseRequest = ::exitApplication) {
        App()
    }
}

Everything compiles and runs correctly. But for the Android target something is missing for whatever reasons.

[nbransby]

        FirebasePlatform.initializeFirebasePlatform(object : FirebasePlatform() {
            val storage = mutableMapOf<String, String>()
            override fun store(key: String, value: String) = storage.set(key, value)
            override fun retrieve(key: String) = storage[key]
            override fun clear(key: String) {
                storage.remove(key)
            }

            override fun log(msg: String) = println(msg)
        })

this part should only be in desktopApp

[nbransby]

        Firebase.initialize(Application(), options)

also this part needs to pass the android context on android instead of Application(), or you can put all of this in desktopApp and use the Firebase configuration file on Android

[StefMa]

Thank you for the quick response! That makes sense. I will give it a try and report back if it works 👌

[StefMa]

Nice, it works. Thanks again!

I guess it make sense to adjust the docs in the java-sdk repo 😉