Failed to resolve variable '${animal.sniffer.version}' when migrate to AndroidX

Question

I'm using Android Studio 3.2 Beta5 to migrate my project to AndroidX. When I rebuild my app I got these errors:

ERROR: [TAG] Failed to resolve variable '${animal.sniffer.version}'

ERROR: [TAG] Failed to resolve variable '${junit.version}'

Full clean & rebuild did not work! Anyone know how to fix this?

---

gradle.properties

android.enableJetifier=true
android.useAndroidX=true

build.gradle

buildscript {
    repositories {
        google()
        jcenter()
        mavenCentral()
        maven { url 'https://maven.fabric.io/public' }
        maven { url "https://oss.sonatype.org/content/repositories/snapshots" }
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:3.2.0-beta05'

        classpath 'com.google.gms:google-services:4.0.1'
        classpath "io.realm:realm-gradle-plugin:5.3.1"
        classpath 'io.fabric.tools:gradle:1.25.4'
        classpath 'com.google.firebase:firebase-plugins:1.1.5'
    }
}

allprojects {
    repositories {
        google()
        jcenter()
        mavenCentral()
        maven { url "https://oss.sonatype.org/content/repositories/snapshots" }
    }
}

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

app/build.gradle

apply plugin: 'com.android.application'
apply plugin: 'realm-android'
apply plugin: 'io.fabric'
apply plugin: 'com.google.firebase.firebase-perf'

android {
    compileSdkVersion 28
    buildToolsVersion "28.0.0"
    defaultConfig {
        applicationId "com.iceteaviet.fastfoodfinder"
        minSdkVersion 16
        targetSdkVersion 28
        versionCode 1
        versionName "1.0"
        multiDexEnabled true
    }

    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
        debug {
        }
    }
    aaptOptions {
        cruncherEnabled = false
    }
}

dependencies {
    implementation fileTree(include: ['*.jar'], dir: 'libs')
    testImplementation 'junit:junit:4.12'

    implementation 'com.jakewharton:butterknife:9.0.0-SNAPSHOT'

    implementation 'androidx.appcompat:appcompat:1.0.0-rc01'
    implementation 'com.google.android.material:material:1.0.0-rc01'
    implementation 'androidx.legacy:legacy-support-v4:1.0.0-rc01'
    implementation 'androidx.cardview:cardview:1.0.0-rc01'

    implementation 'com.google.maps.android:android-maps-utils:0.5'
    implementation 'com.google.android.gms:play-services-maps:15.0.1'
    implementation 'com.google.android.gms:play-services-location:15.0.1'
    implementation 'com.google.firebase:firebase-core:16.0.1'
    implementation 'com.google.firebase:firebase-database:16.0.1'
    implementation 'com.google.firebase:firebase-auth:16.0.1'
    implementation 'com.google.android.gms:play-services-auth:15.0.1'

    implementation 'com.github.bumptech.glide:glide:4.7.1'

    implementation 'com.google.code.gson:gson:2.8.5'
    implementation 'com.squareup.retrofit2:retrofit:2.4.0'
    implementation 'com.squareup.retrofit2:converter-gson:2.4.0'

    implementation 'org.greenrobot:eventbus:3.1.1'

    implementation 'de.hdodenhof:circleimageview:2.2.0'

    implementation 'io.realm:realm-android-library:5.3.1'

    implementation 'com.facebook.android:facebook-android-sdk:4.34.0'

    implementation 'io.reactivex.rxjava2:rxandroid:2.0.2'
    implementation 'io.reactivex.rxjava2:rxjava:2.0.2'

    implementation 'androidx.multidex:multidex:2.0.0'

    implementation 'com.crashlytics.sdk.android:crashlytics:2.9.4'
    implementation 'com.google.firebase:firebase-perf:16.0.0'

    implementation 'com.jakewharton.timber:timber:4.7.1'

    annotationProcessor 'com.jakewharton:butterknife-compiler:9.0.0-SNAPSHOT'
    annotationProcessor 'com.github.bumptech.glide:compiler:4.7.1'
}

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

Answer 1

I fix this with two steps

1) File -> Invalidate Caches / restart...

2) Build -> Clean project