Most voted "firebase" questions
Firebase is a platform for real-time storage-based application development and data synchronization using client-side code only.
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answer466
viewsHow to search within a Recycleview?
I have a Recycleview that receives data from Firebase, each data creates a box in the layout with the information contained within each key there in Firebase. I want you to search for a certain data…
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answers263
viewsError with icon, vibration and sound in notification
I’m developing an app that receives notifications coming from firebase, I’m able to receive notifications quietly when the application is open, everything I’ve instated in Notificationcompat works,…
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answer1800
viewsConvert a JSON String to a JAVA Object Array
Hello, I’m not getting the conversion, my string is coming like this. { "empresa1": { "category_id" : "Item 1", "id" : 1, "imagePath" : "imagem", "name" : "empresa 1", "short_desc" : "desc da…
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answers45
viewsHow to know which file is repeating in the console.log?
I have a problem with my code, where I use javascript, firebase and bootstrap. I search for information in firebase and have a "new" within the query that creates some information in my html. But if…
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answers52
viewsRoutine with Firebase
It is possible to set up a routine for a firebase database? In hosting websites and dbs we usually have the option to leave a php file or other, for example, that every x hours run your script, I…
firebaseasked 6 years, 9 months ago Woton Sampaio 1,461 -
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answer2021
viewsref() or Child() when reading firebase web data
What’s the difference between ref() and child() firebase? When should I use one or the other? Is there any difference in performance?
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answer472
viewsCreate new Ode in Firebase
I’m developing an Android chat room app using Firebase. The current structure is as follows (being Assedio, Beauty etc rooms): To date, user data is being stored with the Firebase standard,…
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answers58
viewsI can’t log in with google in my Release app
in this part of else and does not continue logging in, I already got sha1 from Key store path by prompt as the code -list -v -keystore "Local da chave" -alias nomealias -storepass senha -keypass…
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answer2002
viewsHow to set up admin user and common user in Firebase
I have a web system that will be used by two different types of users, the administrator and the common. There are some options that will only be available to the administrator (for example,…
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answer984
viewsReturn list from a child in firebase
Good morning ! Guys, I have a situation in which I want to return in a list all the data whose one of the children are equal to id, in the image below I have the nodes structures of my database in…
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answers22
viewsIonic 1 + Firebase Authentication
Someone would have an authentication tutorial tip with Ionic 1 + Firebase to pass?
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answer777
viewsConnect Firebase to Postman
There is possibility to connect to firebase the Postman tool ? I need some program to make the connection and then perform "POST" inside the firebase. I need to register several products there that…
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answers70
viewsaddView(View, Layoutparams) is not supported in Adapterview when accessing "Home" activity
I am developing a shopping cart for Android using Firebase and I am having problems using Recycleview since the activity is crashing after user login, producing the following error. Log 05-24…
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answers55
viewsHow can I fix this? Save category p back
Guys, I’m gonna try to express myself briefly. I’m venturing into a wallpaper app, but since I don’t have much experience, I can’t deal with this problem. On the download Adapter, set background and…
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answer96
viewsHow to return only 10 records in firebase?
I wish to return only an exact number of firebase records, but I don’t know how it should be done, is there any way?
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answers41
viewsFirebase Messaging with Django
I am a long time already getting caught up with it. After hours and days I could see a light at the end of the tunnel. I’m using a plugin for Django, this one: https://github.com/xtrinch/fcm-django…
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answers182
viewsSettings Firestore - Firebase
Referent to configuration Firestore on existing projects. [ANDROID] I tried to include and configure according to the supporting material and not the right one. Error when adding dependencies in…
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answer830
viewsProblems to list firebase data on android
Good morning ! I’m having trouble listing data from a certain node in my application... when I list it as the codes below I get the following return from Exception:…
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answer208
viewsHow to download data from firebase by Storage?
I used the documentation provided by Firebase and still did not understand how to download a file that is in Storage by my app.
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answers20
viewsError uploading with Firebasestorage.net with Xamarin
I developed the following routine to upload images. var task = new FirebaseStorage("xxxxxx.appspot.com") .Child("data") .Child("random") .Child("file.png") .PutAsync(img); When I try to send I get…
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answer285
viewsnotifyDataSetChanged() does not work
I am in a chat app and would like to use the notifyDataSetChanged to scroll to the end of the page automatically without the user having to read all the messages. however when I try to use…
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answers316
viewsNo Setter/field for found on class
So, guys, it’s kind of a beat-up question I know, but I couldn’t find a solution to my code here. I need to get the information that’s inside node 5883, but apparently it populates my class with the…
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answers145
viewserror share png image (taken from firebase) and put in an image view
happens the following. I have a share button, when I try to share an image from inside my drawable, beauty it goes, now when I try to share the image that came from firebase, there will "it closes…
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answer227
viewsHow to add Firebase data to a Recycleview and show on Android screen with Kotlin?
How to bring this fire list to the cel screen? val store = Shop("Fique Linda", "Temos o melhor!", R.drawable.storefiquelinda) val dataBase = FirebaseDatabase.getInstance() val myRef =…
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answer74
viewsRecover the amount of children who have a knot
How do I recover the amount of children you have in a knot? I already have the right path, I just need to know how to count the children of this knot. private DatabaseReference qtdeFilRef;…
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answer214
viewsGoogle firebase login error
I am new in Android programming and would be grateful if you could help me. I made an app that uses login with Google firebase, works perfectly when I run directly on mobile but when I sign the APK…
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answer956
viewsDelete firebase record
Hello, I read the firebase records and insert an array of objects. The Json class has only business fields and does not have the key field. To delete a record I evaluate that the Best approach would…
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answers560
viewsSend camera photo to Firebase Storage
I need to make mine App open the camera, take a photo and when returning to the Fragment previous and click on the "Upload" button, send this photo to the Firebase Storage. I managed to do with…
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answer63
viewsIs the firebase quota per account or for the project?
Guys, I’m having a question about the firebase quota, in this link there is the quota information of firebase https://firebase.google.com/pricing/? hl=en. However, the page does not say whether the…
firebaseasked 5 years, 11 months ago Matheus Diógenes Andrade 113 -
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answers68
viewsProblem with Angular and Firebase
I’m trying to create an application with Angular and Firebase, followed a guide I found on the internet, but the data is not being stored in the database! Follows the code of the component…
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answers23
viewsHow to automatically generate fields in Firebase Cloudfirestorage
I am using Firebase database 'Cloudfirestore', I wonder if it is possible to save the fields automatically, so when adding any new item, do not need to write the name of each field and the value. If…
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answer301
viewsMysql structure in firebase/firestore
How to create a collection 1:1 and 1:n in firebase, as in the images, where I have company tables, city and categories, as would the relationship between them in the firestore, mainly the relation 1…
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answer40
viewsHow to limit Firebase Storage downloads to a certain maximum amount per user time period?
I would like to know how I can limit the download demand on my app,20 per hour... obs. use firebase , no login, the only way I recognize a user and with id de anúncio do google the application only…
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answers54
viewsAndroid Firestore - Add collection
I’m new to Android, and I have a JSON file with address data from markets in my region and would like to import this data to firebase, more precisely to the Cloud Firestore. Does anyone know how to…
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answer169
viewsjava.lang.Nullpointerexception: Attempt to invoke virtual method 'java.util.List .adapter.Conversasadapter.getConversas()' on a null Object Reference
I’m having this mistake opening ChatActivity.class. Does anyone have a solution to this error? Thanks in advance. Mistakes EDIT: --LINE WRONG LINE LINE 89->> Conversation Taught =…
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answer366
viewsdoubts firebase with Ionic (ion-select)
I have an application, and I want to know how to insert information into the firebase database and then put this data inside a ion-select, my application uses a select of professions such as:…
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answers390
viewsError while running project in android studio
While running my project the following error appeared: Error:com.android.builder.dexing.DexArchiveBuilderException: Failed to process…
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answers84
viewsHow to insert a field in a Firebase document by Ionic Angular code?
I am not able to insert a field with the user id in a document, I need the user.uid to become a field of type Boolean I tried that, but I miss the point: let{ user.uid : true } I also tried to add…
angular ionic firebase firebase-databaseasked 5 years, 6 months ago Leonardo Henrique de Andrade 11 -
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answer65
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answer277
viewsweb request and json no c#
I am working with firebase, and I am searching the server data with Httpwebrequest, I was able to recover this data in the following way; {"-L1od7ljenm8zhsps7ne":{"Age":"18…
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answers20
viewsFirebase Cloud Functions
Good afternoon. Where can I learn about Firebase cloud functions in order to do my own functions ? i need to start from scratch and I can’t find any material or one on the internet with step by…
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answer944
viewsPick up product prices in an array, add them up and present the total sum in a Textview
Hello, guys, so, I’m having a hard time solving a problem here, I’m using a Multiautocompletetextview to pick up products and their prices in the app’s Firebase database, however, I would like to…
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answer651
viewsHow to compile a list with data from an Observable?
How to go through data from an Observable and insert into a list? I would like to compile a list of all the arrays within Observable that comes from Cloud Firestore, because I need a list of people…
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answers88
viewsFLUTTER ERROR The method 'to do Login' was called on null
Hello, whenever I call some element of my Provider, I get that error that this null import 'package:controlsport_app_ecommerce/helpers/validator.dart'; import…
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answer39
viewsHow to update a node reference in Firebase to another node?
I have in the database structure with 2 nodes ("location" and "lot"). Within the "batch" structure, I have a "location" reference in the "local_lot" attribute, as described in the image. When…
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answer505
viewsHow to check if file exists in Firebase web Storage?
I’m making a web application with firebase, in this application I have an image registration (optional), similar to the idea of a profile (the user may or may not have a registered image if a…
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answer562
viewsWait for the results of asynchronous Firebase methods
I am frequently having problems in various code snippets where I need to call asynchronous methods from the Firebase Database library. The issue is that these methods often do not return their…
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answer145
viewsAm I throwing correctly?
I’m doing like a Firebase DAO that performs and handles Auth, Database and Storage. But Firebase emits some exceptions depending on the scenario, password with less than 6 digits, email already…
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answers71
viewsChat Notification Firebase Onesignal
I developed a chat with Ionic+firebase, and at this time I’m trying to develop the notification system if a new msg will be received I’m using Onesignal, but I don’t have much idea how I could…
firebase ionic2 onesignal firebase-cloud-messagingasked 6 years, 9 months ago Maicon Luiz Anschau 11 -
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answer501
viewsSort firebase list
Currently I use this function to read data from firebase database: function ler() { database.ref(referencia_database).orderByChild('nome').once('value').then(function(snapshot) {…