Android Multiple dex files define Lcom/google/android/gms/common/api/zza

Question

Building project and deploying app to the emulator with API level 22 or 25 goes ok, but when i try to build APK or deploy app to my real device with API level 16 i get the f

Answer 1

Although I had the same error but the above solution did not work for me. I managed to solve the error by downgrading my firebase-ui library version from 2.0.0 to 1.2.0 and added the following to Project level build.gradle file:

allprojects {
    repositories {
        jcenter()

        // Add the following
        maven {
            url 'https://maven.fabric.io/public'
        }
    }
}

Answer 2

This probably doesn't apply to the original question, but in case it helps someone else. I ran into this error with my ionic v1 project. I don't use firebase, but I did fix it with this answer (easy fix for me - standardize all google service versions to be the same in android/project.properties)

Answer 3

for me, I just update firebase library to the newest version and it just worked

Answer 4

Move this:

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

to the bottom of your app/build.gradle file.