java.lang.NoClassDefFoundError: Failed resolution of: Landroid/support/v4/util/ArrayMap

Question

My app works perfectly when you run it on API 23 - 25, but on API 21 & 22 it crashes with the following error:

12-12 15:01:18.436 2         


        

Answer 1

I was having this same issue and solved it by adding these dependencies to the android/app/build.gradle file:

dependencies {
    implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
    testImplementation 'junit:junit:4.12'
    androidTestImplementation 'com.android.support.test:runner:1.0.2'
    androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.2'
    implementation 'com.google.firebase:firebase-analytics:17.2.0'
    // I had to add the following to fix this error.
    implementation 'com.google.firebase:firebase-auth:19.0.0'
    implementation 'com.google.firebase:firebase-firestore:21.1.1'
}