Questions tagged as 'firebase'

Tagged questions
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Pass an image from an activity to main screen

How can I move an image from an activity to another actiivity? I have an image on my settings screen, I want to send it to my home screen. I saved it in my sharedPreferences and would like to use the key on my other screen, just like I do...
asked by 29.11.2018 / 14:06
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Working with asynchrony using ReactJS

I have the following code: requireUsers = () => { this.users = database.ref('users') this.users.on('value', snapshot => { this.state.users = snapshot.val() Object.keys(snapshot.val()).map((value,key) => emails[...
asked by 04.11.2018 / 04:32
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How to create an array with results obtained through an observableany [] TYPESCRIPT

Well, I get an array of keys, which I use to search the firebase: addprd(a:string){ this.prdarray.push(a); } After adding the keys I want to use in the search I use the following medoto: queryProd(as:string){ const prdN :Observable<...
asked by 04.07.2018 / 12:46
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How to delete a specific child in Firebase?

I want to exclude only the 1st child (L7jrJ6DtQWrmZsC4zvT) from Firebase through an option in an Android app. I searched several places and could not find it. I only found the option to delete the entire database. Can anyone help?     
asked by 16.03.2018 / 19:52
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Make sum of the values of each equal item, stored in one object and store in another array

I am making an application using firebase and reactjs, which returns an object with the outflow. Since I am using chartjs to display a graph, I need to generate an array where each position would have the total sum for each month. My difficulty...
asked by 09.10.2018 / 21:51
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Is it possible to use firebase on computers?

I need to create a custom finance control application for the company I work with and wanted to know if it is possible through some mechanism to create a database in firebase to be used in android, web and pc, in an integrated way and in time re...
asked by 09.02.2018 / 16:30
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Error: Uncaught (in promise): Error: PERMISSION_DENIED: Permission denied

I'm doing an application with Ionic 3 and Firebase, where Crud is. My problem is that I'm trying to save the data, but when it comes to saving it, I have not got permission. What should I do?    ERROR Error: Uncaught (in promise): Error: PERM...
asked by 06.04.2018 / 15:51
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How do I send push notifications to a specific user (from the application) through Firebase?

I'm developing applications using the Ionic framework. One of the biggest questions I have is how do I work as remote notifications (other than local notifications, easily generated by Ionic). Using Firebase, I was able to generate remote not...
asked by 05.03.2018 / 20:41
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Return value in string with firebase

In Android Studio I have the following code in MainActivity package br.alan.com.firebaseapp; import android.support.annotation.IdRes; import android.support.v7.app.AppCompatActivity; import android.os.Bundle; import android.support.v7.widget....
asked by 31.08.2017 / 19:43
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EditText already filled in after user login using firebase

Hello I have a question about a process that I can not do. I have the following screen, and I wanted the EditText user to already be populated with the user name or the user's email. I'm new to the mobile programming area, and I tried to do t...
asked by 07.09.2017 / 17:23