Firebase FCM how to get token

Question

It s my first time using FCM  I download a sample from firebase quickstart-android and I install the FCM Quickstart  But I can t get any token from the log even hit the LOG TOKEN button in the app  Then I try to send a message with Firebase console and set to target my app package name  I got incoming messages  I want to know can FCM be used GCM everything is ok  Solution  Because I am not an Android developer  just a backend developer  So it takes me some time to solve it  In my opinion  there re some bugs in the sample app   Code  RegistrationIntentService java public class RegistrationIntentService extends IntentService        private static final String TAG    quot RegIntentService quot         public RegistrationIntentService             super TAG               Override     protected void onHandleIntent Intent intent            String token   FirebaseInstanceId getInstance   getToken            Log i TAG   quot FCM Registration Token   quot    token            MyFirebaseInstanceIDService java public class MyFirebaseInstanceIDService extends FirebaseInstanceIdService        private static final String TAG    quot MyFirebaseIIDService quot                   Called if InstanceID token is updated  This may occur if the security of        the previous token had been compromised  Note that this is called when the InstanceID token        is initially generated so this is where you would retrieve the token                  START refresh token       Override     public void onTokenRefresh                Get updated InstanceID token            String refreshedToken   FirebaseInstanceId getInstance   getToken              Log d TAG   quot Refreshed token   quot    refreshedToken                   TODO  Implement this method to send any registration to your app s servers            sendRegistrationToServer refreshedToken              Intent intent   new Intent this  RegistrationIntentService class           startService intent                 END refresh token                  Persist token to third-party servers          lt p gt         Modify this method to associate the user s FCM InstanceID token with any server-side account        maintained by your application                 param token The new token              private void sendRegistrationToServer String token               Add custom implementation  as needed           Add this in the MainActivity java   Intent intent   new Intent this  RegistrationIntentService class           startService intent    After do above you get the Token in Logcat  But finally  I find a convenient way to get it Just use debug mode to install the sample app and you can get the token when you first time to install it  But I don t know why it can t print the log when I install it  Maybe be related to the mobile system  And then why I can t get the Notification  FirebaseMessagingService onMessageReceived did not call sendNotification

User · Answer

This line should get you the firebase FCM token.

String token = FirebaseInstanceId.getInstance().getToken();
Log.d("MYTAG", "This is your Firebase token" + token);

Do Log.d to print it out to the android monitor.

User · Answer

UPDATE 11-12-2020  When you use  com google firebase firebase-messaging 21 0 0  is FirebaseInstanceIdis depreacted now Now we need to use FirebaseInstallations getInstance   getToken   and FirebaseMessaging getInstance   token SAMPLE CODE FirebaseInstallations getInstance   getToken true  addOnCompleteListener               firebaseToken   it result   token               OR  FirebaseMessaging getInstance   token addOnCompleteListener               if it isComplete                   firebaseToken   it result toString                   Util printLog firebaseToken

User · Answer

According to doc  Migrate a GCM client app to FCM   onTokenRefresh        only Called if InstanceID token is updated   So it will call only at first time when you install an app to your device   So I suggest please uninstall your app manually and try to run again   definitely you will get TOKEN

User · Answer

FirebaseInstanceId getInstance   getInstanceId   deprecated  Now get user FCM token  FirebaseMessaging getInstance   getToken                addOnCompleteListener new OnCompleteListener lt String gt                       Override                 public void onComplete  NonNull Task lt String gt  task                        if   task isSuccessful                              System out println  quot -------------------------- quot                            System out println  quot   quot    task getException                             System out println  quot -------------------------- quot                            return                                                Get new FCM registration token                     String token   task getResult                            Log                      String msg    quot GET TOKEN  quot    token                      System out println  quot -------------------------- quot                        System out println  quot   quot    msg                       System out println  quot -------------------------- quot

User · Answer

The team behind Firebase Android SDK change API a little bit  I ve implemented  quot Token to Server quot  logic like this  In my instance of FirebaseMessagingService  public class FirebaseCloudMessagingService extends FirebaseMessagingService                  Override     public void onNewToken String token               sending token to server here                    Keep in mind that token is per device  and it can be updated by Firebase regardless of your login logic  So  if you have Login and Logout functionality  you have to consider extra cases   When a new user logs in  you need to bind token to the new user  send it to the server   Because token might be updated during the session of old user and server doesn t know token of the new user  When the user logs out  you need to unbind token  Because user should not receive notifications messages anymore   Using new API  you can get token like this  FirebaseInstanceId getInstance   getInstanceId   addOnSuccessListener new OnSuccessListener lt InstanceIdResult gt               Override         public void onSuccess InstanceIdResult instanceIdResult                String token   instanceIdResult getToken                   send it to server                     Good luck

User · Answer

FASTEST AND GOOD FOR PROTOTYPE The quick solution is to store it in sharedPrefs and add this logic to onCreate method in your MainActivity or class which is extending Application  FirebaseInstanceId getInstance   getInstanceId   addOnSuccessListener this  instanceIdResult - gt        String newToken   instanceIdResult getToken        Log e  quot newToken quot   newToken       getActivity   getPreferences Context MODE PRIVATE  edit   putString  quot fb quot   newToken  apply         Log d  quot newToken quot   getActivity   getPreferences Context MODE PRIVATE  getString  quot fb quot    quot empty    quot      CLEANER WAY A better option is to create a service and keep inside a similar logic  Firstly create new Service public class MyFirebaseMessagingService extends FirebaseMessagingService         Override     public void onNewToken String s            super onNewToken s           Log e  quot newToken quot   s           getSharedPreferences  quot   quot   MODE PRIVATE  edit   putString  quot fb quot   s  apply                Override     public void onMessageReceived RemoteMessage remoteMessage            super onMessageReceived remoteMessage              public static String getToken Context context            return context getSharedPreferences  quot   quot   MODE PRIVATE  getString  quot fb quot    quot empty quot             And then add it to AndroidManifest file  lt service         android name  quot  MyFirebaseMessagingService quot          android stopWithTask  quot false quot  gt           lt intent-filter gt               lt action android name  quot com google firebase MESSAGING EVENT quot    gt           lt  intent-filter gt   lt  service gt   Finally  you are able to use a static method from your Service MyFirebaseMessagingService getToken Context   THE FASTEST BUT DEPRECATED Log d  quot Firebase quot    quot token  quot   FirebaseInstanceId getInstance   getToken      It s still working when you are using older firebase library than version 17 x x

User · Answer

You can use the following in Firebase  FCM  to get the token   FirebaseInstanceId getInstance   getToken

User · Answer

Important information      if google play service hung or not running    then fcm return token   null   If play service working properly then FirebaseInstanceId getInstance   getToken   method returns token  Log d  FCMToken    token    FirebaseInstanceId getInstance   getToken

User · Answer

You can use these 2  methods  to get device token with firebase but the second one method is more efficient way   FirebaseInstallations getInstance   getToken false  addOnCompleteListener new OnCompleteListener lt InstallationTokenResult gt               Override         public void onComplete  NonNull Task lt InstallationTokenResult gt  task                if  task isSuccessful                     return                               Get new Instance ID token             DeviceToken   task getResult   getToken                        Second method   you  can also use this one  FirebaseMessaging getInstance   getToken   addOnCompleteListener new OnCompleteListener lt String gt               Override         public void onComplete  NonNull Task lt String gt  task                DeviceToken  task getResult

User · Answer

for those who land here  up to now FirebaseInstanceIdService is deprecated now  use instead   public class MyFirebaseMessagingService extends FirebaseMessagingService        Override     public void onNewToken String token            Log d  MY TOKEN    Refreshed token      token               If you want to send messages to this application instance or            manage this apps subscriptions on the server side  send the            Instance ID token to your app server             sendRegistrationToServer token             and declare in AndroidManifest   lt application     gt    lt service android name   fcm MyFirebaseMessagingService  gt       lt intent-filter gt                   lt action android name  com google firebase MESSAGING EVENT    gt       lt  intent-filter gt   lt  service gt   lt  application gt

User · Answer

Try this  Why are you using RegistrationIntentService    public class FirebaseInstanceIDService extends FirebaseInstanceIdService            Override     public void onTokenRefresh                 String token   FirebaseInstanceId getInstance   getToken                registerToken token              private void registerToken String token

User · Answer

If are using some auth function of firebase  you can take token using this     ------GET USER TOKEN------- FirebaseUser mUser   FirebaseAuth getInstance   getCurrentUser    mUser getToken true           addOnCompleteListener new OnCompleteListener lt GetTokenResult gt                  public void onComplete  NonNull Task lt GetTokenResult gt  task                    if  task isSuccessful                          String idToken   task getResult   getToken                                                                               Work well if user are logged  getCurrentUser

User · Answer

The FirebaseInstanceId getInstance   getInstanceId   is deprecated  Based on firebase document  you can retrieve the current registration token using following code  FirebaseMessaging getInstance   getToken        addOnCompleteListener new OnCompleteListener lt String gt               Override         public void onComplete  NonNull Task lt String gt  task              if   task isSuccessful                  Log w TAG   quot Fetching FCM registration token failed quot   task getException                 return                            Get new FCM registration token           String token   task getResult                  Log and toast           String msg   getString R string msg token fmt  token             Log d TAG  msg             Toast makeText MainActivity this  msg  Toast LENGTH SHORT  show

User · Answer

At the same time don not forget to include this in your manifest file to receive token id   lt service     android name   MyFirebaseInstanceIDService  gt       lt intent-filter gt           lt action android name  com google firebase INSTANCE ID EVENT   gt       lt  intent-filter gt   lt  service gt

User · Answer

Instead of this           START refresh token       Override     public void onTokenRefresh               Get updated InstanceID token            String refreshedToken   FirebaseInstanceId getInstance   getToken              Log d TAG   Refreshed token      refreshedToken                TODO  Implement this method to send any registration to your app s servers            sendRegistrationToServer refreshedToken              Intent intent   new Intent this  RegistrationIntentService class           startService intent                 END refresh token    Do this           START refresh token       Override     public void onTokenRefresh                Get updated InstanceID token          String refreshedToken   FirebaseInstanceId getInstance   getToken              Log d TAG   Refreshed token      refreshedToken               Implement this method to send token to your app s server        sendRegistrationToServer refreshedToken                  END refresh token    And one more thing      You need to call sendRegistrationToServer   method   which will update token on server  if you are sending push   notifications from server    UPDATE   New Firebase token is generated  onTokenRefresh   is called  when    The app deletes Instance ID The app is restored on a new device The user uninstalls reinstall the app The user clears app data

User · Answer

In firebase-messaging 17 1 0 and newer the FirebaseInstanceIdService is deprecated  you can get the onNewToken on the FirebaseMessagingService class as explained on https   stackoverflow com a 51475096 1351469  But if you want to just get the token any time  then now you can do it like this   FirebaseInstanceId getInstance   getInstanceId   addOnSuccessListener  this getActivity     new OnSuccessListener lt InstanceIdResult gt         Override   public void onSuccess InstanceIdResult instanceIdResult        String newToken   instanceIdResult getToken        Log e  newToken  newToken

User · Answer

Settings Secure getString getContentResolver                         Settings Secure ANDROID ID

User · Answer

FirebaseInstanceId getInstance   getInstanceId   addOnCompleteListener new OnCompleteListener lt InstanceIdResult gt                   Override             public void onComplete  NonNull Task lt InstanceIdResult gt  task                    if   task isSuccessful                          Log w TAG   getInstanceId failed   task getException                         return                                        Get new Instance ID token                 String   token     task getResult   getToken

User · Answer

FirebaseInstanceId class and it s method getInstanceId are also deprecated  So you have to use FirebaseMessaging class and it s getToken method instead  FirebaseMessaging getInstance   getToken   addOnSuccessListener token - gt            if   TextUtils isEmpty token                 Log d TAG   quot retrieve token successful    quot    token             else              Log w TAG   quot token should not be null    quot                     addOnFailureListener e - gt              handle e        addOnCanceledListener    - gt              handle cancel        addOnCompleteListener task - gt  Log v TAG   quot This is the token    quot    task getResult        The method getToken   is deprecated  You can use getInstanceId   instead  If you want to handle results when requesting instanceId token   check this code  FirebaseInstanceId getInstance   getInstanceId   addOnSuccessListener instanceIdResult - gt            if  instanceIdResult    null                String token   instanceIdResult getToken                if   TextUtils isEmpty token                     Log d TAG   quot retrieve token successful    quot    token                           else              Log w TAG   quot instanceIdResult should not be null   quot                     addOnFailureListener e - gt              do something with e        addOnCanceledListener    - gt              request has canceled        addOnCompleteListener task - gt  Log v TAG   quot task result    quot    task getResult   getToken

User · Answer

try this  FirebaseInstanceId getInstance   instanceId addOnSuccessListener OnSuccessListener lt InstanceIdResult gt    instanceIdResult - gt               fcm token   instanceIdResult token

[android] Firebase (FCM) how to get token

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