Questions tagged as 'firebase'

Tagged questions
2
answers

"keytool" is not recognized as an internal or external command, program or batch file executable

I am trying to implement Firebase in my Android Studio application and since I want to use Firebase Auth I need the SHA-1 signature certificate, and to get it I need to execute this code in the CMD: keytool -exportcert -list -v \ -alias androi...
asked by 06.08.2017 / 07:06
1
answer

Authenticate user (Facebook) with Firebase

I am trying to authenticate my registered users through Facebook in Firebase. But the Firebase documentation is in objective-C and I'm working with Swift. I have already created the app from Facebook and authenticated by Facebook on the Fireb...
asked by 21.02.2016 / 06:00
1
answer

Collections within documents in firebase and angular 7

I have the following code to obtain two observables in one and be able to manipulate them. public products: any; ngOnInit() { this.products = this.productService.products().snapshotChanges().map(productSnaps => { return...
asked by 24.11.2018 / 23:54
1
answer

How can I remove a field from a multidimensional array?

You see I have a multidimensional array and I need to remove a field from that array but I can not get it. I must clarify that I am using firestore firestore. That's my code: db.collection("database").doc("users").get().then(data => {...
asked by 01.11.2018 / 08:39
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answer

Query several fields of a node in firebase

When doing a query in firebase in a node like in this case the document, I want to bring two fields of that node and put them in a variable String, to add information to the database I do not use login, I use the push method ( ). when clickin...
asked by 13.06.2018 / 01:46
1
answer

How to invert the order of a ngFor

I bring the information of a json that I generate with firebase, and I print it with a ngFor , but it always prints the arrangement from the first to the last one, I would like to do it the opposite. This is how I get the data...
asked by 03.04.2018 / 19:28
1
answer

Show only People with a specific value (Firebase)

I have a recyclerview that I charge from a database that I have in Firebase , I do it like this: databaseReference.child("Personas").addChildEventListener(new ChildEventListener() { @Override public void onChildAd...
asked by 08.06.2017 / 23:32
1
answer

How to know when when the request to the server has ended with Angular2 and Firebase

I am using angularfire2 to communicate with the Google Firebase backend. This is the code: import {Component} from '@angular/core'; import {AngularFire, FirebaseListObservable} from 'angularfire2'; @Component({ selector: 'app', template...
asked by 15.07.2016 / 15:00
1
answer

Could not find com.google.gms: google-services: 4.0.1

I am trying to add Firebase to my Android project, I follow the steps indicated in the wizard to add it to your Android application and it gives an error when it did the Gradle synchronization. I add the file google-serviles.json to my androi...
asked by 10.12.2018 / 18:57
2
answers

How to call specific fields Firebase Database Android

Good morning, I have this model private Button verdosis, verhipo; private String Lista="dosis"; private String lis2="Hipoglucemia"; private TextView textViewf,textViewhipo; FirebaseDatabase database = FirebaseDatabase.getInstance(); FirebaseD...
asked by 26.09.2018 / 18:45