Cant add firebase to android app

Question

I want to add firebase to my app for push notifications. I have followed the firebase docs and have done this:

root/app/build.gradle :

dependencies {
    compile fileTree(dir: 'libs', include: ['*.jar'])
    testCompile 'junit:junit:4.12'
    compile 'com.android.support:appcompat-v7:23.1.1'
    compile 'com.google.firebase:firebase-core:9.0.2'
}

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

root/build.gradle :

dependencies {
        classpath 'com.android.tools.build:gradle:1.5.0'
        classpath 'com.google.gms:google-services:3.0.0'
    }

I have also added the google-services.json in root/app dir. On trying to sync the project, there is an error :

Error:(25, 13) Failed to resolve: com.google.firebase:firebase-core:9.0.2

I dont understand why this error is present. How can I resolve it?

Answer 1

1. Go to Tools->Android->SDK Manager.
   
2. In SDK Tools tab update 'Google Play services' and 'Google Repository' to minimum 30 and 28 respectively.
3. Sync project with Gradle files.

Answer 2

Update following SDK tools packages from SDK manager will solve your problem

See Video How To Fix

Answer 3

update to 9.0.2 it will resolve all the problems.

Also update Google Repository and Google Play Services.