FirebaseInstanceId.getInstance() returns null

Question

I am integrating Firebase Cloud messaging in android

app build.gradle looks like this

implementation 'com.google.firebase:firebase-auth:16.0.3'
implementation 'com.google.firebase:firebase-messaging:17.3.3'
implementation 'com.google.android.gms:play-services-auth:16.0.0'


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

class path in apllication level build.gradle is

dependencies {
        classpath 'com.android.tools.build:gradle:3.2.0'
        classpath 'com.google.gms:google-services:4.0.1'
    }

and my manifest is something like that

<service android:name=".firebase.MyFirebaseMessagingService">
       <intent-filter>
          <action android:name="com.google.firebase.MESSAGING_EVENT" />
       </intent-filter>
  </service>
       <meta-data
        android:name="com.google.firebase.messaging.default_notification_icon"
        android:resource="@drawable/ic_artize_a" />

    <meta-data
        android:name="com.google.firebase.messaging.default_notification_color"
        android:resource="@color/colorAccent" />

    <meta-data
        android:name="com.google.firebase.messaging.default_notification_channel_id"
        android:value="@string/default_notification_channel_id" />

My problem is that When I try to get FirebaseInstanceId.getInstance() it returns null. so I am unable to get Token.

Even onNewToken of MyFirebaseMessagingService is not fired a single time in app.

Can Some one tell me why i am getting FirebaseInstanceId.getInstance() null here thanks in advance.

Here i am trying to get firebase token

private void getFirebaseToken(){
        FirebaseInstanceId firebaseInstanceId = FirebaseInstanceId.getInstance();
        if(firebaseInstanceId == null){
            return;
        }


        firebaseInstanceId.getInstanceId().addOnCompleteListener(new OnCompleteListener<InstanceIdResult>() {
            @Override
            public void onComplete(@NonNull Task<InstanceIdResult> task) {
                if (!task.isSuccessful()) {
                    return;
                }

                // Get new Instance ID token
                String token = task.getResult().getToken();

            }
        });
    }

Show where in your code you're calling FirebaseInstanceId.getInstance() — m0skit0
– m0skit0, Commented Oct 3, 2018 at 13:16
May be If you are calling FirebaseInstanceId.getInstance() on UIThread it is giving you null. Try to execute it on separate thread. — Mahavir Jain
– Mahavir Jain, Commented Oct 3, 2018 at 13:19
I am calling FirebaseInstanceId.getInstance() in OnCreate method of an activity — Navin Gupta
– Navin Gupta, Commented Oct 3, 2018 at 13:21
@m0skit0 I have tries two ways.First time i called this method in AsyncTask's doInBackground it doesn't work then i make a thread and call this method it also not worked............... — Navin Gupta
– Navin Gupta, Commented Oct 4, 2018 at 5:09
@NavinGupta I am having the same issue , did you find any solution ? — alphaguy
– alphaguy, Commented Dec 26, 2018 at 9:15

creativecoder · Accepted Answer · 2019-07-17 05:08:15Z

7

After Long research, I found that tools:node="replace" in the manifest file is making FCM to not work.

Change tools:node="replace" to tools:node="merge"

go through this link

https://github.com/firebase/quickstart-android/issues/477

answered Jul 17, 2019 at 5:08

creativecoder

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Vinoth M · Accepted Answer · 2019-07-16 17:54:50Z

3

try to replace in your Android Manifest application tag with the below attributes

android:allowBackup="false" tools:node="merge" tools:replace="android:label,android:allowBackup"

answered Jul 16, 2019 at 17:54

Vinoth M

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2 Comments

JerabekJakub Over a year ago

Thank you Vinoth! Do you know what causing this?

Vinoth M Over a year ago

@JerabekJakub when you build the apk file, gradle not include content provider ( FirebaseInitProvider class) in android manifest file

Brennan Sebastian · Accepted Answer · 2018-10-12 09:36:42Z

Having FirebaseInstanceId.getInstance(); on the UI thread shouldn't be a problem. I have the following in the onCreate method of the MainActivity and it works perfectly (probably not recommended by google and others):

FirebaseInstanceId.getInstance().getInstanceId().addOnCompleteListener(instance_id_completion_listener);

Try the following steps:

Add implementation 'com.google.firebase:firebase-core:16.0.1' to the app build.gradle file.
Remove, but back it up, all manifest entries related to Firebase. I don't have any in my manifest file however I am only using Firebase to get an instance id.
If one hasn't done so already go to https://firebase.google.com/docs/android/setup and add Firebase to Your Android Project.

One could also try the following:

private void getFirebaseToken(){

    FirebaseInstanceId.getInstance().getInstanceId().addOnCompleteListener(new OnCompleteListener<InstanceIdResult>() {
        @Override
        public void onComplete(@NonNull Task<InstanceIdResult> task) {
            if (!task.isSuccessful()) {
                return;
            }

            Log.d("getFirebaseToken", "Successful");

            // Get new Instance ID token
            String token = task.getResult().getToken();

        }
    });
}

For testing purposes only as this is not a good idea on the UI thread, try the following:

private void getFirebaseToken(){
    FirebaseInstanceId firebaseInstanceId = FirebaseInstanceId.getInstance();

    try
    {
        Thread.sleep(2000);
    } 
    catch (InterruptedException e)
    {
        e.printStackTrace();
    }

    if(firebaseInstanceId == null){
        return;
    }


    firebaseInstanceId.getInstanceId().addOnCompleteListener(new OnCompleteListener<InstanceIdResult>() {
        @Override
        public void onComplete(@NonNull Task<InstanceIdResult> task) {
            if (!task.isSuccessful()) {
                return;
            }

            // Get new Instance ID token
            String token = task.getResult().getToken();

        }
    });
}

triad · Accepted Answer · 2019-03-16 05:08:44Z

0

For me there was a missing declaration in the AndroidManifest.xml

<application ... >

    <meta-data
        android:name="com.google.android.gms.version"
        android:value="@integer/google_play_services_version" />

After adding it, the issue was resolved.

answered Mar 16, 2019 at 5:08

triad

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