Myujth

I have an app that stores an FCM registration token to a MySQL database. When the app is installed initially the app sends null to the database, but when the app is launched a second time the token is sent to the database.

Is there a way where the token can be sent immediately when the app is installed?

MainActivity

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

 String recent_token = task.getResult().getToken();
 SharedPreferences sharedPreferences = getApplicationContext().getSharedPreferences(getString(R.string.FCM_PREF), Context.MODE_PRIVATE);
 SharedPreferences.Editor editor = sharedPreferences.edit();
 editor.putString(getString(R.string.FCM_TOKEN), recent_token);

 editor.commit();

 else


 
 
 );
 SharedPreferences sharedPreferences=getApplicationContext().getSharedPreferences(getString(R.string.FCM_PREF), Context.MODE_PRIVATE);
 final String token=sharedPreferences.getString(getString(R.string.FCM_TOKEN),"");

The FCM token is generated asynchronously. Most like you're requesting the token through FirebaseInstanceId.getInstance().getInstanceId() when it hasn't been generated yet. To ensure you get the token as soon is it has been generated, monitor token generation as shown in the documentation:

/**
 * 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.
 */
@Override
public void onNewToken(String token) 
 Log.d(TAG, "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);

This ensures that you always get called whenever a token gets generated, which happens when the app first runs after installing, and may occur at certain moments after that.