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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answers695
viewsHow does data encryption work in Firebase?
I am developing an Android messaging application using Firebase and I realized that it will be necessary to protect the user data and the messages exchanged by them, because at the moment it is…
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answers700
viewsHow to install/run a signed app to view the error log?
I am developing an app and direct testo on mobile (LGE API Level 16) . When testo, runs normal. But when I generated a signed apk, and try to install this apk on the same phone it just says:…
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answers604
viewsHow does firebase work for sending notifications?
This question is not about codes but understanding the functioning of firebase. I want to build a system that notifies the user in an Android app through a PHP web service. For what I researched,…
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answer358
viewsHow do I use Firebase as a database in a Django application?
I just created a Django project and would like to use Firebase instead of sqlite as a database. I looked in several places but could not find anywhere how to do the integration. Someone could help…
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answer371
viewsDelete firebase web folder
How to delete a folder from Storage? To delete a file I use: firebase.storage().ref('pasta/arquivo.png').delete() But it doesn’t work if I use it directly in the folder:…
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answer335
viewsApp stop working after firebase push notification on Ionic 3
I’m trying to make a push notification using the cloudSettings with firebase, but when I send a message the app stops working and the following message appears: app.modulets.: const cloudSettings:…
ionic apache-cordova firebase push-notification ionic3asked 7 years, 4 months ago DiegoAugusto 8,694 -
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answer256
viewsPush Notification with Firebase + business rules
I have to receive push notification from firebase, but it is not for all phones that these notifications will be sent. My app checks for changes in contracts, the user reports a number of CPF and…
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answers537
viewsPermission denied on Firebase
I’m developing an app with Ionic 3 and the Firebase ... In the rules of Realtime Database, the problem arises: I try to put the rules pro type "user", but the following error arises : ERROR Error:…
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answers24
viewsProject Problems - Firebase + Analytics
Hello. I use Google Newsstand Producer by generating articles from my website to the Google News App. To use Analytics, it was necessary to create a project in Firebase. I did, and when I went back…
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answer54
viewsAndroid/Firebase - Nullpointerexception when setting Query object
Hello, I have a problem while reading the data in Firebase. I use Android Studio 3.0 and Java. I can connect to the database, get the instance, the logged in user, but I’m not able to read the…
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answers109
viewsFirebase cloud messages does not send messages to all devices using the app
I implemented the cloud messaging of Firebase using flutter and so far so good, I tested the sending of push notifications to an emulator of an android and it worked fine, the notification arrived…
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answer129
viewsData disappears while moving Recyclerview scroll with Firebase
Hello folks I am creating a chat with Firebase and listing with Recyclerview, to list the messages but I am with a problem is that when moving or scrolling Recyclerview some messages disappear,…
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answer50
viewsProblems with Firebase Insertion
I am developing a native application on Android that uses maps, the insertion is normally happening through the code below. Local is a variable of type LatLng.…
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answer244
viewsHow to block login access after 3 wrong firebase attempts
I was putting the lock after 3 wrong attempts on login, however I found in some forums that when hold malicious tries to force multiple passwords he will not use the email fields and password, this…
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answer120
viewsRecyclerview scroll position with Firebase
I am listing data from Firebase in a RecyclerView, but when adding or removing data, the data is repeated in the list. I used the clear(); or lista.removeAll(lista); to clear before filling only the…
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answer100
viewsRedeem Firebase information on a Textview on Android
All right people? I would like to rescue the information from Firebase in a Textview on Android. I can already enter the information in the Database, as shown in the following image: I would like to…
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answers47
viewsDoes Firebase not allow you to use get and set in query information?
I’m trying to use the get and set methods with javascript in firebase querys.. It does not allow me to use get() because it does not access the array and is giving error or lenght 0. Why it happens…
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answers28
viewsDeploy Angular 8 app to Firebase
Hello, I’m a beginner in Angular and Firebase. And I’m developing a little app for my fiancée. A system where she will arrange the orders, stock and etc from her small workshop of manual embroidery.…
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answers63
viewsFirebase Function nodemailer Office365
I’m using firebase Function to trigger the nodemailer and send an email. Using gmail I was successful, but Outlook365 does not work. In Transporter I do this way: var transporter =…
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answer585
viewsFirebase data reading always returns null
I’m trying to read data from users who are saved in Firebase, through an Android application. I’m always having null in Textviews, but I see the value in Android Studio’s Logcat. I’ve checked my…
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answer1192
viewsCount the number of records in firebase
Good morning Developers! I’m having a hard time in a project that I can’t move forward, here’s the problem/scenario: We have a screen that brings information, a message, and on the screen there is…
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answers1031
viewsFirebase - Relationship between documents
I know the firebase is Nosql/Norel, but I have this doubt and it is very relevant given to the project I am developing. In the traditional Mysql model, when we have a table of categorias, for…
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answers1849
viewsIs it possible to get the firebase user via UID?
Doubt consists in the following problem: I have a project using firebase and Ionic 3. I am using the authentication mode via E-mail, in which you have the email and UID stored. For example: I have 2…
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answers275
viewsDefine Matdatepicker component format
How to define component format Datepicker in Angular 6. In my Angular 6 application, I am working with the database Cloud Firestore of Firebase. When performing a document query, when the document…
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answer147
viewsFirebase getDisplayName() returns empty
I have the following code that should return the user data logged in by Firebase, it returns the user without any problem, the ID and the Email, but the value of the name returns empty or null. As…
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answers880
viewsUpdate only 1 item within firebase’s
I have the following knot in firebase: Inside this node I need to access the user value and change it, to do this I am using this code: firebaseSenha =…
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answers1117
viewsCheck if a value exists in the Firebase Realtime Database
I have a database with this structure: what happens is that when creating a new user, I need to check if there is no longer a registered equal nickname, but I am not able to do this. Here’s the code…
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answer120
viewsPlace an IF inside HTML text with Ionic/firebase
so I’m having a problem with my code, I’d like to do an if inside my Ionic html code, something like: <ion-item class="camposSelect" *ngFor="let person of profiles" > <ion-label…
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answer52
viewsHelp with product registration with images
I am trying to register products, where it is possible to register more than one photo per product. But in the service that I created, I call a for to fill the image matrix, this happens very well.…
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answer381
viewsProblems while trying to recover data from firebase Realtime database
I’m doing my TCC using Ionic 4 and firebase Authentication and Realtime Database, for a few days I ended up crashing when I try to recover only one user from the database, when the user data is…
angular ionic firebase typescript firebase-databaseasked 5 years, 11 months ago Alexandre Scussel 21 -
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answers1101
viewsCloud Firestore - Composite query
I’m making a query in my database in the firestore, but when I put two where nested, I get the following error: Error getting documents Error: Firestore: Operation was rejected because the system is…
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answers40
viewsContent of a form field as research parameter
I have a form with the following fields (I will put only one, as an example): <div class="form-group"> <label for="nomeAutor"><i class="zmdi zmdi-account…
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answer173
viewsHow does an object return using addListenerForSingleValueEvent from fire base?
Hello, I would like to know if it is possible returns an object using Query.addListenerForSingleValueEvent() from firebase, follow example code... public static Passageiro getDadosUsuarioLogado() {…
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viewsHow to have both restriction and permission in the Cloudfire Store
I’m using firebase as a database, specifically the cloudFire store database. I have a field called comment, which I want to be read by all users at the same time, but only the administrator can…
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answer195
viewsFirestore Timestamp
I’m doing a show with Firestore of a record. When the date is saved in the database, it is saved as Timestamp (For example: Timestamp(Seconds=149914800, nanoseconds=0)), but when I open the plug…
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answers182
viewsAccessing sub-collection in snapshot.data
Hello, I build one ListView with a FutureBuilder. But I need to access a sub-collection, then a document and get a field from the document. But returns null, how do I do that? For example: To get…
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answers26
viewsRecovery of Images in Firebase Storage "Failing" Randomly
I am creating an app in which in the main Fragment a Recyclerview displays a list of registered animals. Images are being saved to Storage with the name = Animal Id + ". jpeg". I retrieve the list,…
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answers27
viewsHow can I set 10 items per listview?
Hello, I would like to know how I can show 10 items per page in listview? Adapter: ThreadsAdapter(@NonNull Context context, int resource, @NonNull List<MessageThread> objects, ThreadsActivity…
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answers34
viewsProblem using System with Where firebase
Hello, I’m trying to filter orders by the current date, but when I try to use Where in the firebase’s Collection, my Listen simply stops working. Sending no new update to the list. In a totally…
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answer1425
viewsDelete records in Firebase
I am developing a small chat using the Firebase. My intention was to do the login in my application and save the usuarioLogado in the database and by logoff delete this user from the database.…
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answers106
viewsAuthentication problem with firebase 3.0 in Node.js
Because firebase has upgraded to version 3.0 and it is necessary to migrate to the new version, a problem has arisen regarding my Node server authentication. The code is like this var firebase =…
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answers275
viewsHow to get notification data with onNewIntent
I have an application where when I click on the notification I would like to get the values set in the notification putExtra within onNewIntent, follow my code to see if anyone can help me. Intent i…
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answer404
viewsFirebase Cloud Messaging x Google Cloud Messaging
What’s the difference between Firebase Cloud Messaging and Google Cloud Messaging? Both are free? Who keeps Firebase Cloud Messaging? What would be the best option?
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answers1093
viewsHow to store "direct link" to an image using Firebase Storage
I need to access an image stored in Firebase Storage via a direct link, e.g.: http://myfirebasehost.com/storage/imgIwant.png As far as I know, this type of URL is only possible using the protocol…
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answers186
viewsHow to read large text files on Android?
I wanted to know some tip on how to read large files on Android, as example give the GTFS (Google Transit) files that most of the time is 80 MB I am placing this data on a server (Firebase) using…
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answer280
viewsError android Studio + Firebase
I developed an application was registering and everything, but at the time I implemented the function to display the data in a Logcat, my application even stopped starting Activity. Has anyone ever…
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answer225
viewsSpring Security Oauth + Firebase
Good afternoon. I’m implementing the security layer of my application. I decided that we will use Firebase to perform the authentication, and when it returns the access token to the client it will…
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answers369
viewsError writing to firebase: Can’t pass null for argument 'pathString' in Child()
I’m new to firebase and I’m making an app where I want to record two entities in one event. I want to record a user and a bakery, but I’m not getting it. The user records everything right, but at…
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answers3457
viewsHow to create a chat app with Firebase and Android?
I want to create a chat with Android and Firebase, all the tutorials I saw on the internet are not complete. I would like to know how to make a chat using these two tools. It does not need to look…
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answer51
viewsLoad webView after clicking allow on SWIFT 3
I have a webView that captures the device token using the firebase library and then sends it to my url via get. Until ai td right, I was able to get the token, and I can send it to the url and in…