Questions tagged as 'firebase'

Tagged questions
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How to get the grandchildren from a list of children of a parent node in Firebase?

I am currently working with Firebase and Android. I am trying to make a rating system for a list of restaurants but I have found a detail, I do not know how I can get the grandchildren from a list of children of a parent node and then take the a...
asked by 02.09.2018 / 19:10
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Notification submission does not recognize attribute time_to_live (TTL) in cURL with Firebase

Hi, I have a problem with notifications sent through Firebase , the notification is sent perfectly, but by setting the time_to_live (TTL) attribute or message life time it does not recognize it, just overlooked and does not take it into account...
asked by 27.08.2018 / 18:41
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Developer error Android studio

When you want to log in with Gmail Firebase in the app, you get this error From what I have read one of the failures is because the signed the apk with another key SHA-1 other than the one I have in firebase but when I try to add the ne...
asked by 20.08.2018 / 20:02
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Firebase notifications with closed app

I am implementing a system in which I receive push notifications with Firebase. If the application is open or in the background, I am able to capture the notification sent by firebase, I take the data and if I am interested I show a notificat...
asked by 20.08.2018 / 09:52
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How do I select a navigation menu item and modify it by code?

I need to take an item and modify it according to a condition. I do not want the item to change when I click on it. This is my code now. public boolean onNavigationItemSelected(MenuItem item) { // Handle navigation view i...
asked by 17.08.2018 / 23:01
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Register the value of a ZXingsacanner in Firebase

What happens is that I want to insert certain values in my BD Firebase but when I get the value of a barcode scanned by camera, the register button is disabled and it does not let me, but if I add it manually if I can register the product Thi...
asked by 13.08.2018 / 17:49
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Problem with Android Scanner

I have performed many procedures and I have not found the solution for several days with this error. I am making an application in which various products are registered, which I want to take the bar code by means of a scanner with the camera of...
asked by 16.08.2018 / 18:56
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Notifications real-time chat on android with firebase

We are developing an app that uses real-time chat between users (how to WhatsApp) and we have the doubt to know how to make us notify (and sound) each time a user writes to another. The messages arrive between users, but they do not know they no...
asked by 11.08.2018 / 11:52
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Ionic angular firebase bring all the data of a collection

I appeal to your help, because I do not know how to solve this. this is the structure of my collection I need to bring the data: name, description and photo of each one. in my provider I was doing it this way and then, I was calling...
asked by 04.08.2018 / 23:09
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Expected a List while deserializing, but got a class java.util.HashMap Firebase Android

I'm surprised to have this failure because it happens to me just initialize the app and it never happened to me. The fault can be something of the json? I leave the code where the fault occurs public void datos() { navMenuName.setText( us...
asked by 05.08.2018 / 17:21