Issue with Hilt Application Class: Gradle Dependency Conflict

Question

I'm working on an Android project that runs fine without the following Hilt application class:

package com.app.bestride

import android.app.Application
import dagger.hilt.android.HiltAndroidApp

@HiltAndroidApp
class BestRideApplication : Application() {
    // Empty for now
}

However, whenever I add this class, I encounter the following error:

Unable to find method ''java.lang.String com.squareup.javapoet.ClassName.canonicalName()''
'java.lang.String com.squareup.javapoet.ClassName.canonicalName()'

Gradle's dependency cache may be corrupt (this sometimes occurs after a network connection timeout.)

Re-download dependencies and sync project (requires network)
The state of a Gradle build process (daemon) may be corrupt. Stopping all Gradle daemons may solve this problem.

Stop Gradle build processes (requires restart)
Your project may be using a third-party plugin which is not compatible with the other plugins in the project or the version of Gradle requested by the project.

In the case of corrupt Gradle processes, you can also try closing the IDE and then killing all Java processes.

Here's build.gradle file

plugins {
    alias(libs.plugins.androidApplication)
    alias(libs.plugins.jetbrainsKotlinAndroid)
    alias(libs.plugins.daggerHilt)
    kotlin("kapt")
}

android {
    namespace = "com.app.bestride"
    compileSdk = 34

    defaultConfig {
        applicationId = "com.app.bestride"
        minSdk = 24
        targetSdk = 34
        versionCode = 1
        versionName = "1.0"

        testInstrumentationRunner = "androidx.test.runner.AndroidJUnitRunner"
        vectorDrawables {
            useSupportLibrary = true
        }
    }

    buildTypes {
        release {
            isMinifyEnabled = false
            proguardFiles(
                getDefaultProguardFile("proguard-android-optimize.txt"),
                "proguard-rules.pro"
            )
        }
    }
    compileOptions {
        sourceCompatibility = JavaVersion.VERSION_1_8
        targetCompatibility = JavaVersion.VERSION_1_8
    }
    kotlinOptions {
        jvmTarget = "1.8"
    }
    buildFeatures {
        compose = true
    }
    composeOptions {
        kotlinCompilerExtensionVersion = "1.5.1"
    }
    packaging {
        resources {
            excludes += "/META-INF/{AL2.0,LGPL2.1}"
        }
    }
}

dependencies {

    implementation(libs.androidx.core.ktx)
    implementation(libs.androidx.lifecycle.runtime.ktx)
    implementation(libs.androidx.activity.compose)
    implementation(platform(libs.androidx.compose.bom))

    implementation(libs.androidx.ui)
    implementation(libs.androidx.ui.graphics)
    implementation(libs.androidx.ui.tooling.preview)
    implementation(libs.androidx.navigation.compose)
    implementation(libs.androidx.material3.android)
    implementation(libs.play.services.maps)
    implementation(libs.maps.compose)
    implementation(libs.hilt.android)
    implementation(libs.firebase.auth.ktx)
    kapt(libs.hilt.android.compiler)
    implementation(libs.androidx.hilt.navigation.compose)

    testImplementation(libs.junit)
    androidTestImplementation(libs.androidx.junit)
    androidTestImplementation(libs.androidx.espresso.core)
    androidTestImplementation(platform(libs.androidx.compose.bom))
    androidTestImplementation(libs.androidx.ui.test.junit4)
    debugImplementation(libs.androidx.ui.tooling)
    debugImplementation(libs.androidx.ui.test.manifest)
}

// Ensure kapt settings are included
kapt {
    correctErrorTypes = true
}

Here's toml file

    [versions]
agp = "8.3.0"
hiltAndroid = "2.44"
hiltNavigationCompose = "1.2.0"
javapoet = "1.13.0"
kotlin = "1.9.0"
coreKtx = "1.12.0"
junit = "4.13.2"
junitVersion = "1.1.5"
espressoCore = "3.5.1"
lifecycleRuntimeKtx = "2.7.0"
activityCompose = "1.8.2"
composeBom = "2023.08.00"
mapsCompose = "4.3.3"
material3Android = "1.2.1"
navigationCompose = "2.7.7"
playServicesMaps = "19.0.0"
firebaseAuthKtx = "23.0.0"

[libraries]
androidx-core-ktx = { group = "androidx.core", name = "core-ktx", version.ref = "coreKtx" }
androidx-hilt-navigation-compose = { module = "androidx.hilt:hilt-navigation-compose", version.ref = "hiltNavigationCompose" }
hilt-android = { module = "com.google.dagger:hilt-android", version.ref = "hiltAndroid" }
hilt-android-compiler = { module = "com.google.dagger:hilt-android-compiler", version.ref = "hiltAndroid" }
javapoet = { module = "com.squareup:javapoet", version.ref = "javapoet" }
junit = { group = "junit", name = "junit", version.ref = "junit" }
androidx-junit = { group = "androidx.test.ext", name = "junit", version.ref = "junitVersion" }
androidx-espresso-core = { group = "androidx.test.espresso", name = "espresso-core", version.ref = "espressoCore" }
androidx-lifecycle-runtime-ktx = { group = "androidx.lifecycle", name = "lifecycle-runtime-ktx", version.ref = "lifecycleRuntimeKtx" }
androidx-activity-compose = { group = "androidx.activity", name = "activity-compose", version.ref = "activityCompose" }
androidx-compose-bom = { group = "androidx.compose", name = "compose-bom", version.ref = "composeBom" }
androidx-ui = { group = "androidx.compose.ui", name = "ui" }
androidx-ui-graphics = { group = "androidx.compose.ui", name = "ui-graphics" }
androidx-ui-tooling = { group = "androidx.compose.ui", name = "ui-tooling" }
androidx-ui-tooling-preview = { group = "androidx.compose.ui", name = "ui-tooling-preview" }
androidx-ui-test-manifest = { group = "androidx.compose.ui", name = "ui-test-manifest" }
androidx-ui-test-junit4 = { group = "androidx.compose.ui", name = "ui-test-junit4" }
androidx-material3 = { group = "androidx.compose.material3", name = "material3" }
androidx-material3-android = { group = "androidx.compose.material3", name = "material3-android", version.ref = "material3Android" }
androidx-navigation-compose = { group = "androidx.navigation", name = "navigation-compose", version.ref = "navigationCompose" }
maps-compose = { module = "com.google.maps.android:maps-compose", version.ref = "mapsCompose" }
play-services-maps = { group = "com.google.android.gms", name = "play-services-maps", version.ref = "playServicesMaps" }
firebase-auth-ktx = { group = "com.google.firebase", name = "firebase-auth-ktx", version.ref = "firebaseAuthKtx" }

[plugins]
androidApplication = { id = "com.android.application", version.ref = "agp" }
jetbrainsKotlinAndroid = { id = "org.jetbrains.kotlin.android", version.ref = "kotlin" }
daggerHilt = { id = "com.google.dagger.hilt.android", version.ref = "hiltAndroid" }

Steps I've tried:

• Cleaning and rebuilding the project.
• Invalidating caches and restarting Android Studio.
• Re-downloading dependencies and syncing the project.
• Stopping and restarting Gradle build processes. None of these steps have resolved the issue. The project works perfectly without the BestRideApplication class, but adding it causes the above error.

How can I fix this issue?

Answer 1

what he means is simply putting it on the build gradle kts file that is at module level example

plugins {
    alias(libs.plugins.android.application)
    alias(libs.plugins.kotlin.android)
    alias(libs.plugins.hilt)
    id("kotlin-kapt")
}
hilt {
    enableAggregatingTask = false
}

Answer 2

I had the same issue.

Tried apply false .... well It didn't applied the plugin. I obviously need that plugin for dependency injection to work.

I updated kotlin version to 2.0.21 (currently newest), newest ksp, newest hilt dagger plugin, dependencies - same result.

I also noticed that > Task :app:hiltAggregateDepsDebug FAILED So by googling that issue i stumbled upon This issue.

Provided answer worked for me.

In short

Add this to all modules that uses hilt.

hilt {
    enableAggregatingTask = false
}

p.s. In case it makes a difference i used ksp instead of kapt