Most voted "expo" questions
The expo is a set of tools, libraries and services to create native iOS and Android apps faster.
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6
votes2
answers5261
viewsWhat are the real differences in creating a project with Expo and without Expo?
Recently I saw several items that differentiated a project with or without Expo, but currently the Expo includes many things where before we needed to touch native modules: Sqlite, image…
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votes0
answers606
viewsConnection error at EXPO
Some of you, like me, must have done last Omnistack Week. I am having an error when connecting my back-end Login route in my front-end. I am using the axios for that. When I give a yarn start or…
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votes1
answer95
viewsHow do I access the app via a Url?
I want to access a screen in my app project, by mobile, through a URL that was sent to the email. The project is being developed at the expo and I am trying to use the "linking" of the expo same, I…
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votes1
answer1106
viewsError in executing expo commands in powershell
I’m taking a chance on React Native and it turns out that when I try to execute the command expo init, or even expo --version through Powershell is giving the following error: expo : O arquivo…
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answers30
viewsRun an asynchronous function in React-Nactivate only the first time it is called
I am using the function of the expo-camera Camera component onBarCodeScanned={(event) => { handleQRCode(event); }} And every time there’s a bar code he calls me handleQRCode, but just passing the…
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answers106
viewsHow to run an Expokit project on a mobile phone/emulator for development?
I had a project done in Expo, but ejected it using Expokit, which creates the folders /android and /Ios, I can generate the apk however I can not emulate on my mobile for development. The command I…
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votes0
answers678
viewsExpo-cli installation error
Personal talk. I am trying to install expo-cli on linux (using sudo or not) and am getting the error below: npm ERR! code ELIFECYCLE npm ERR! errno 1 npm ERR! [email protected] install: `node-pre-gyp…
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votes1
answer295
viewsHow to change a state of a Component in React navigation
I need to change a state within a function of React navigation, this state will change a behavior in the Component function TabOneNavigator({navigation}) { React.useEffect(() => { const…
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votes1
answer1076
viewsProblem adding SVG to React Native
I am unable to add an SVG to a component (SplashScreen), follows the code: import {LinearGradient} from 'expo-linear-gradient' import React from 'react'; import {Text, View, Image} from…
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votes0
answers52
viewsCustom fonts do not load in Expo
I’m trying to add custom fonts in my project with expo, but even following the documentation and Apploading returning that the fonts were loaded the text does not change font when placing the…
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votes1
answer89
views"Building Javascript Bundle" very slow to start Expo on Android
In React Native, following the official documentation (step by step) I was able to install the dependencies and everything I needed to run my first project. I created the directory using expo init…
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votes1
answer304
viewsHow to authenticate in Firebase through Google using Expo (React Native)?
I have a web application on firebase, but I’m using it in the development of an android/Ios app using Expo. I want the authentication to be done by Google, but it turns out that because it was…
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votes1
answer1151
viewsHow to generate APK from an Expokit project?
I was with an Expo project, but due to the need to apply payment methods I had to eject the project to have the folders /android and /Ios to edit them directly. I decided to use React-Native-iap, so…
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votes1
answer326
viewsLive Reload not working at the Expo
When emulating an app made with expo on Genymotion, the live Reload do Expo does not work, the options menu is not even open (either using the action of shaking the smartphone or pressing the button…
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votes1
answer429
viewsReact Native application performance built with Expo
I am developing a mobile application using React Native through the Expo but I have been finding a small "problem". I use my physical device (android) to carry out the tests through the Expo…
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votes1
answer203
viewsevaluating 'this.props = props' React Native
I am learning React Activate and I am having a hard time. I am following this tutorial: https://blog.logrocket.com/navigating-react-native-apps-using-react-navigation/ I perform all the same…
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votes2
answers21
viewsBackhandler does not work
In my app React-Native PWA the back button of Android is closing the application. I tried to use this Backhandler function inside any screen to make it come back instead of closing the app but it…
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votes1
answer21
viewsMaterialbottomtabs - Outside the screen boundary
Hello, I’m developing an app with Expo and I’m using React Navigation to do the navigations and Materialbottomtabs on the main screen. How much test the app in Android Expo Client works perfectly,…
android react-native apk react-navigation expoasked 4 years, 7 months ago Mendes Desenvolvimento 11 -
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votes1
answer54
viewsFirebase stopping the iteration of foreach
Goal: I’m trying to make an array of objects containing 3 information: id, title and imageUri. But when taking the value of imageUri firebase(a download URL), the foreach hangs. Error:[Unhandled…
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votes1
answer352
viewsError 4294963238 - React-Native-Gesture-Handler with EXPO
I’m using the Expo together with React, and when I try to install the react-native-gesture-handler with the expo install command react-native-gesture-handler I have the following error: npm ERR!…
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votes1
answer1193
viewsActive React application does not connect to Node.js server on my laptop
I’m developing an app in React Native, using the expo. I have a Node.js API running on my Macbook. Both my phone and laptop are under the same Wifi network. In the app, I have an API call pointing…
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votes1
answer678
viewsAdd Items to a Flatlist
I’ve been trying to add Items to a Flatlist in React Native, so I used the following code: export default function App(){ var list = [ {text: 'Hello', key: 1}, {text: 'Bye', key: 2} ] return(…
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votes2
answers1538
viewsUpdate useEffect from the navigation.goBack page?
I’m developing a App in ReactNative using Expo, but I can’t update the useEffect(() => {}, []) of the previous route from navigation.goBack(). Example: Here time the Index page. function Index(){…
react-native react-navigation react-router react-hooks expoasked 4 years, 2 months ago Jéfferson Maurício 73 -
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votes1
answer80
viewsexpo init/npm init creating many files
Good afternoon, you guys. I’m having a little trouble executing the expo init app. The command works, creates the React-Active files on my Windows correctly, but from a time to time it has failed to…
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votes1
answer88
viewsExpo - Invalid hook call inside function components
I was learning Expo, and I needed to create a dynamic list of counters. On my screen I have a button + that adds other squares, and each of these squares has a counter inside them, from what I…
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votes2
answers444
viewsHow to authenticate user using your Google account in an app built with Expo (React Native)?
I’m developing an app with PHP in the backend and React Turn on the mobile frontend. The app already has a web frontend written with jquery, and the authentication is done using Google Oauth. In the…
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votes0
answers31
viewsReturn "Authentication" property useAuthRequest() is coming "null" | expo-auth-Session
I have a problem with returning the accessToken and the idToken after authentication with lib expo-auth-Session, implemented for connection with the Identity Server. It opens the login page and…
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votes1
answer1136
viewsPush notifications with Expo and React Native
I’m developing an app that needs to notify the user, I’m using Expo and React Native to develop Following the Expo Documentation I can correctly notify with: import * as Notifications from…
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votes0
answers14
viewsAudio Expo does not pause the music
The sound plays normally, but the pause doesn’t work. I tried several algorithms and nothing worked. I think it’s something with the Promisses, because I don’t know much about asynchrony. But when I…
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votes0
answers343
viewsUnhandled Promise rejection: Typeerror: Undefined is not an Object (evaluating '_context.t0.data.error') at expo
my expo is giving this error on my login page, can you help me? here is my code export default class Signin extends Component { state ={ errorMessage: null } here I use apisauce to post on my api…
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votes0
answers30
viewsWhat is the best way to register users in the app via Oauth login (facebook, google and Apple) or login and password
I’m creating an app with Expo (React Native) where do I login Oauth no facebook, google and apple using the Oauth and also via login and password. However I will only work with the registration UID…
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votes1
answer53
viewsCannot scroll to Flat List
I’m building a recipe app with React Native, Expo and Firebase... I’m creating a Flatlist to render cards from an array of objects, but when the cards exceed the height of the screen I can’t see…
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votes0
answers84
views[Unhandled Promise rejection: Typeerror: null is not an Object (evaluating 'bleManager.scan')]
I have the following error in bluetooth connection with React Native, I am using the library react-native-ble-manager and the expo for the construction of this app. The error occurs when I try to…
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votes0
answers129
viewsError generating apk with expo "expo build:android Currently only Supports Managed workflow apps"
I created a project from scratch using the following instructions https://blog.rocketseat.com.br/expo-sdk-38-melhorias-que-fazem-do-expo-uma-opcao-ainda-melhor/ but after 2 months of work trying to…
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votes0
answers30
viewsError serving Expo + React Native Maps
Well I am in the exhaustive attempt to get the React-Native-Maps and finally, to serve it, I made the code (for now simple): import React from 'react'; import { StyleSheet, Text, View } from…
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votes0
answers49
viewsHow do I resolve this error Cannot read the indefinite color property
I’ve tried to change color change Theme but nothing works I’m creating an app with expo using nodejs and with Visual Studio Code const hideErrorMessage = !renderErrorMessage &&…
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votes0
answers43
viewserror using one Signal React Nenable
I’m trying to use onesignal with typescript but I can’t. Every time I run the application it error and the vs code itself keeps pointing error but I can’t resolve... I followed the tutorial in…
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votes0
answers15
viewsVideo control with expo
I’m trying to do the react-native-media-controls control my video of the av expo and in no way works, below I will leave the code of the component complete import React, { useState, useRef } from…
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votes0
answers10
viewsI can’t return to my expo go app after sharing an image on Facebook using expo-sharing?
I’m using expo-sharing (Android) to share images. When I share for Whatsapp, a new window is opened with the Whatsapp app, but when I share with Facebook Lite, I can no longer return in the Expo…
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votes1
answer4755
viewsError starting project with React Native Expo
I have version 8.12.0 of Nodejs installed in Debian 9, so I installed Expo with the command npm install -g expo-cli, that at the end returned the following alerts: Ignoring this I created a project…
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votes1
answer45
viewsKeeping data in the app after updating in the play store
Greetings colleagues, I need a help with a small problem I’m having with an app developed with the expo When we updated the version of our app in the store we changed the architecture of the project…
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votes1
answer149
viewsIs it possible to add Expo to an existing project?
I wonder if it is possible to add the Expo to an existing React Native project. In the Expo documentation I only found to create a project from scratch.
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votes1
answer30
viewsReact-Native expo how to generate a redirect url with Authsession.startAsync({ authUrl})
import * as AuthSession from 'expo-auth-session'; const response = AuthSession.startAsync({ authUrl:…
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votes1
answer34
viewsImage does not get larger than 40x40 pixels
I’m studying reacti Active and I’m trying to show an image in a location on the map. When I adjust the width and height of the image, it ends up being "cut" when it is larger than 40px. I am using…
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votes3
answers429
viewsError installing npm install @React-navigation/stack -> expo start Disconnected
I’m new to React Active and I’m trying to install the React navigation stack using the npm install @React-navigation/stack command to use in an app project with React Active, however after running…
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votes1
answer216
viewsI’m not able to render Image with Image - React-Native
Sirs(s). When I write like that: <View style={{ flex: 1, alignItems: 'center', justifyContent: 'center' }}> <Button title="Pick an image from camera roll" onPress={pickImage} /> {image…
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votes1
answer612
viewsTypeerror: Undefined is not an Object (evaluating 'this.sound.playAsync')
I can’t handle very well with The Expo-av (I don’t think anyone knows why I can’t find tutorials), but what I’m doing wrong? Error import React,{ Component } from 'react'; import { View,…
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votes1
answer490
viewsError when setting values a loop "React Limits the number of renders to Prevent an Infinite loop"
Well, I have a useEffect that searches my data from an API and then set the values to a useState, but it’s entering an infinite loop and I can’t get my values in the other variable I created. export…
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votes1
answer310
viewsPass parameter from one Page to another React Native
I have a login page and another with a webview, I am not able to pass a parameter of the login page to another page with the webview. App.js import React from "react"; import Routes from "./Routes";…
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votes1
answer388
viewsI need help to configure Axios client according to Wi-FI/3G/4G network
I’m developing an app in React-Native using expo, and the app works well on the Wi-Fi from here, but it should also work outside of here, and we have a firewall port that points to API nodejs by our…