Implement Google Analytics for Android in Qt

[Attila]

I'm trying to implement Google Analytics for Android into the native Android part of a Qt project. I'm following these instructions for Google Analytics v4.

The instructions talk about editing the project-level and the app-level build.gradle files. My first problem is here - there is only an app-level build.gradle that I can edit in Qt. I tried anyway and put all the lines into that build.gradle file (I have to admit I had little idea of what I was doing then).

I also generated the necessary configuration file (google-services.json), and put it into the root folder of the exported Android files.

I also set the gradle version in gradle-wrapper.properties to gradle-2.10.

Now when I compile, I get this error:

Dex: Error converting bytecode to dex:
Cause: com.android.dex.DexException: Multiple dex files define Landroid/support/annotation/AnimRes;
    UNEXPECTED TOP-LEVEL EXCEPTION:
com.android.dex.DexException: Multiple dex files define Landroid/support/annotation/AnimRes;
(...)

The app used to work properly so far. I'm using Qt 5.6.
Have you had any experiences with implementing Google Analytics v4 or this issue?

[Attila]

Managed to solve this.
The problem was that android-support-v4.jar was in the libs folder, and it was also listed as a dependency in the build.gradle, thus creating a conflict.
Deleting the .jar file solved this error.

Google Analytics is working now. My build.gradle looks like this:

buildscript {
    repositories {
        jcenter()
    }

    dependencies {
        classpath 'com.android.tools.build:gradle:1.5.0'
        classpath 'com.google.gms:google-services:2.0.0-beta6'
    }
}

allprojects {
    repositories {
        jcenter()
    }
}

apply plugin: 'com.android.application'

dependencies {
    compile fileTree(dir: 'libs', include: ['*.jar'])
    compile 'com.android.support:appcompat-v7:23.2.0'
    compile 'com.android.support:support-v4:23.2.0'

    compile 'com.google.android.gms:play-services-analytics:8.4.0'
}

android {
    /*******************************************************
     * The following variables:
     * - androidBuildToolsVersion,
     * - androidCompileSdkVersion
     * - qt5AndroidDir - holds the path to qt android files
     *                   needed to build any Qt application
     *                   on Android.
     *
     * are defined in gradle.properties file. This file is
     * updated by QtCreator and androiddeployqt tools.
     * Changing them manually might break the compilation!
     *******************************************************/

    compileSdkVersion androidCompileSdkVersion.toInteger()

    buildToolsVersion androidBuildToolsVersion

    sourceSets {
        main {
            manifest.srcFile 'AndroidManifest.xml'
            java.srcDirs = [qt5AndroidDir + '/src', 'src', 'java']
            aidl.srcDirs = [qt5AndroidDir + '/src', 'src', 'aidl']
            res.srcDirs = [qt5AndroidDir + '/res', 'res']
            resources.srcDirs = ['src']
            renderscript.srcDirs = ['src']
            assets.srcDirs = ['assets']
            jniLibs.srcDirs = ['libs']
       }
    }

    lintOptions {
        abortOnError false
    }
}

apply plugin: 'com.google.gms.google-services'