Android app does not connect to Firebase

Question

I\'m developing android app using Firebase GMS service.
I tried to follow their tutorials, i made project as they said, downloaded the json files.

But when I

Answer 1

Go to the app build.gradle file. Replace 'compile' with 'api'. Then, sync your project. The warning should go away. This worked fine for me.

Answer 2

In the Gradle file:

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

This helped me.

Answer 3

I had same problem. I solved it by updating the sha-1 code to firebase console and re-importing google-json file from firebase. The main problem I found that after updating the android studio the sha-1 or md5 code has changed.

Answer 4

in my case in my manifest remove node

 <application
        android:name=".controller.AppController"
        android:allowBackup="false"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:usesCleartextTraffic="true"
        android:roundIcon="@mipmap/ic_launcher"
        android:supportsRtl="true"
        tools:node="replace"
        android:theme="@style/AppTheme">

remove this line

 tools:node="replace"

and replace with this

tools:replace="allowBackup"

Answer 5

Watch out if you are using:

android.enableR8 = true

Just remove it for the moment. That was the error for me.

Answer 6

I had some other error in build.gradle file. After commenting out below line, it started working :

dexOptions
            {
                //incremental false
            }