I am using FCM to provide notifications in my app. Everything worked well, but the FCM TOKEN is not working. Please how do i go about this? may be i have made some errors.

                        public void onSuccess(QuerySnapshot queryDocumentSnapshots) {
                            User obj=new User();
                            for(QueryDocumentSnapshot doc:queryDocumentSnapshots)
                                obj=doc.toObject(User.class);


                            db.document("User/" firebaseAuth.getCurrentUser().getEmail()).update("fcmToken",SharedPref.getInstance(getApplicationContext()).getToken())
                                    .addOnCompleteListener(new OnCompleteListener<Void>() {```


And 

```<action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>

        <service android:name="com.Falcon.DigitalLibrary.MyFirebaseMessagingService"
            android:exported="false">
            <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_stat_notification" />
        <meta-data
            android:name="com.google.firebase.messaging.default_notification_color"
            android:resource="@color/colorAccent" />```

CodePudding user response：

Use these permissions in gradle file

//Firebase
    implementation platform('com.google.firebase:firebase-bom:28.2.1')
    implementation 'com.google.firebase:firebase-core'
    implementation 'com.google.firebase:firebase-auth'
    implementation 'com.google.firebase:firebase-messaging'
    implementation 'com.google.android.gms:play-services-basement:17.6.0'
    implementation 'com.google.firebase:firebase-database:19.7.0'

Plese use these code to get Fcm tokem from firebase

 FirebaseMessaging.getInstance().getToken().addOnCompleteListener(new OnCompleteListener<String>() {
            @Override
            public void onComplete(@NonNull com.google.android.gms.tasks.Task<String> task) {
           try {
               String token = task.getResult();
               Log.e("DeviceToken = ",token);
              
           }catch (Exception e){
               e.printStackTrace();
           }

            }
        });

CodePudding user response：

Step 1 : Add this snippet to your AndroidManifest.xml File.

<service
   android:name=".firebase.MyFirebaseMessagingService/*Path of your firebase class*/"
   android:exported="true"
   android:stopWithTask="false">
       <intent-filter>
            <action android:name="com.google.firebase.MESSAGING_EVENT" />
            <action android:name="com.google.firebase.INSTANCE_ID_EVENT" />
       </intent-filter>
</service>

Step 2: In your firebase class (Either you can override onNewToken Method) or go to step 3.

public class MyFirebaseMessagingService extends FirebaseMessagingService {

    @Override
    public void onNewToken(@NotNull String token) {
        super.onNewToken(token);
        getSharedPreferences("_", MODE_PRIVATE).edit().putString("FcmId", token).apply();
        FirebaseMessaging.getInstance().subscribeToTopic("global");
    }
}

Step 3 : Create this function. and call it in onCreate Method.

private void getFirebaseTokenId() {
            try {
                FirebaseMessaging.getInstance()
                        .getToken()
                        .addOnSuccessListener(token -> {
                            fcmId = token;
                        })
                        .addOnFailureListener(e -> {
                            if (getActivity() != null && !getActivity().isDestroyed() && !getActivity().isFinishing()) {
                                if (TextUtils.isEmpty(fcmId)) {
                                    fcmId = MyFirebaseMessagingService.getToken(getActivity());
                                }
                            }
                        });
            } catch (Exception e) {
                e.printStackTrace();
                if (getActivity() != null && !getActivity().isDestroyed() && !getActivity().isFinishing()) {
                    Toast.makeText(getActivity(), e.getLocalizedMessage(), Toast.LENGTH_SHORT).show();
                }
            }
    }