Questions tagged as 'firebase'

Tagged questions
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Return data with Firestore and Vuejs

Dear I need to know how to return data with Firestore and Vuejs. The problem I have is that I can see the data from console.log () but not from v-for="". Complete script: <template> <div id="cuentacontable"> {{ mensa...
asked by 14.11.2018 / 13:05
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Random keys in Firebase How to show the data of the BD in Android Studio?

Cordial greeting, I am developing a project for the measurement of blood pressure and the data that I relate below is generated by a voltage meter through the arduino card, however I could not visualize them in android studio, the attached code...
asked by 13.11.2018 / 01:34
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Because I do not synchronize the firebase data

I have a problem and the data is not synchronized, the file compiles, followed this tutorial link and compiles correctly but I do not change the data, since android I got it. I followed this tutorial link Any ideas? FileInputStre...
asked by 12.11.2018 / 10:52
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Inquiry about Firebase and Angular 6

I want to develop a collapse with angular and firebase, that as I click on the button, I will see the following information in the form of a fan (collapse) . This information must be stored in the firebase database respecting the structure...
asked by 12.11.2018 / 13:05
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why can not I make a ValueEventListener within a For cycle?

I want to make several calls with a For a Firebase cycle using the ValueEventListener or also with the ListenerForSingleEvent but the for is thrown to the last value of the "i" counter and there is only one call and not of each value, A that?...
asked by 19.11.2018 / 02:31
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How do I get data that does not repeat from Firebase in Android Studio?

Hi, I have a problem with Firebase, I'm creating an app that is like a data capture application where the user clicks on YES or NO and I have to make a statistical chart of how many of them have SI in different fields such as Comment, Plane ,etc...
asked by 11.11.2018 / 22:02
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Error connecting Firebase to Android app

I'm trying to implement Firebase in my Android app but I can not get it to work. I tell you the steps that I have followed I've registered with firebase I have created a project in firebase In the application folder of my application I h...
asked by 10.11.2018 / 19:09
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promises in firebase

I'm working with real time firebase, and I have a problem getting a value within a promise, because I would like that value to be stored in a global variable firebaseService.database().ref('Users/' + us.uid).once('value').then(function(snap...
asked by 08.11.2018 / 01:46
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iOS Firebase - How to obtain and save the URL of a photo?

I want to save in Firebase the url of a photo that is selected by the user. Xcode is showing me the following error: Use of unresolved identifier 'profileImageUrl'; I do not know how to solve it. @IBAction func signUpBtn(_ sender: Any) { A...
asked by 21.11.2018 / 00:03
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Queries in FIREBASE with expandableListView

Hello, someone could help me to check that I am doing wrong in my query, what happens is that I can not recover the type in firebase of each question that I select in the expandable ListView Please and thank you .. myRef.child("...
asked by 21.11.2018 / 00:49