Questions tagged [expo]
Expo is an open-source and free platform that lets web developers build truly native apps that work across both iOS and Android by writing them once in just JavaScript. Use the Expo tag on questions about developing Expo projects and using the Expo development tools like XDE and exp.
777
questions
351
votes
12
answers
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What is the difference between Expo and React Native?
From the Expo website
Expo lets web developers build truly native apps that work across both iOS and Android by writing them once in just JavaScript.
Isn't this what React Native does? What's the ...
- 3,543
358
votes
38
answers
493k
views
Hide header in stack navigator React navigation
I'm trying to switch screens using both stack and tab navigator.
const MainNavigation = StackNavigator({
otp: { screen: OTPlogin },
otpverify: { screen: OTPverification},
...
- 3,811
0
votes
1
answer
811
views
How to load custom fonts with the useFonts hook in React Native
While waiting for a custom font to load, it's preferable to not render anything until the font is ready.
In the bad old days (December 2021), I learned to use the <AppLoading /> component in the ...
- 5,387
11
votes
2
answers
7k
views
How to add network_security_config.xml to manifest in expo app without ejecting
I'm building an app with expo.
Using Axios to handle the requests.
The API has a self-signed certificates.
Requests fail on android 7 (they work on android 9)
I read online that I need to add a ...
- 121
108
votes
17
answers
57k
views
Xcode 15: Unable to boot the Simulator
I was able to run iOS simulator fine with Xcode 14 and my Mac recently updated the latest version of Xcode which is 15 then I'm no longer able to boot a device from its new simulator.
I did try many ...
- 16.9k
53
votes
11
answers
66k
views
How to reduce the size of an expo/react-native app on Android
I am developing a small dictionary app by using react native with expo.
As I am compiling to Apk file. The size goes up to 30mb and after having installed on a device, it goes to 80mb.
Is this ...
- 2,118
1
vote
1
answer
2k
views
Extend (Update) third-party old type declaration interface with new one
My problem is that I'm using an old type declaration package (@types/expo). So that's why I need to update some part of it. I created a new typing file like this. (./typings/expo/index.d.ts)
import * ...
- 3,314
9
votes
2
answers
4k
views
React Native Blob fetch throws error: Failed to construct 'Response': The status provided (0) is outside the range [200, 599]
I am trying to convert an image to blob for uploading it to aws s3 storage.I need to connvert image to blob after selecting the image with expo-image-picker the convert to blob using fetch but it is ...
- 123
7
votes
3
answers
8k
views
What is the best way to store private data in react-native?
How can i implement feature like remember me when authenticating via react application? I think unencrypted AsyncStorage isn't the best way to do it, because data is open for users. I've tried to use ...
- 1,737
0
votes
0
answers
579
views
Expo app connection with NodeJS stops working with sockets
I have an app built with expo and nodejs. Everything is working fine and accordingly. Recently i created an admin panel with ReactJS and trying to create an in app message feature inside my expo app ...
- 763
204
votes
19
answers
152k
views
Error Appstore connect : Missing Purpose String in Info.plist File
I've submitted my app for review to the App Store Connect. Although the app is still under review, I've received an email to inform me that I have to fix an error. Here is the content of the message:
...
- 3,840
148
votes
7
answers
116k
views
Cannot add task 'wrapper' as a task with that name already exists
When installing 'react-native init AwesomeProject' I get this error when I run react-native run-android:
Could not determine java version from '11.0.1'.
A quick google suggests I need to update the ...
- 1,511
85
votes
39
answers
107k
views
Network Response Time Out Error (create-react-native-app) (expo)
I am trying to run create-react-native-app on expo app in android.
Firstly ,I created the project by writing command
create-react-native-app test
then I executed
npm start
then scanned the qr ...
- 2,715
59
votes
20
answers
136k
views
'expo' is not recognized as an internal or external command
After running npm install -g expo-cli and successfully installing the packages globally, expo is still not recognized as an internal or external command. Does anyone know how I might get around this ...
- 601
50
votes
17
answers
47k
views
Calling locally hosted server from Expo App
I am creating a react-native app and one of the components I have created contains a property which is populated through data coming from an http request.
Right now I am hosting the server from my ...
- 823
40
votes
15
answers
67k
views
React Native Expo change default LAN IP
I've got virtual box installed. And when I look at the host > LAN > ip address is exp://192.168.56.1:19000.
How can I change it without disable the network? because it's my virtualbox ip and my ...
- 7,597
1
vote
1
answer
1k
views
"$expo start" not opening the metro bundler in chrome anymore
Running expo start used to automatically open a useful UI on the browser in regards to the Metro Bundler, and now it's gone from all the boilerplate apps, so I can only assume it's been dropped by ...
- 51
50
votes
10
answers
33k
views
React-native bundling failure. ERROR MESSAGE: "While trying to resolve module 'idb'..... Indeed none of these files exist":
ERROR MESSAGE IN QUESTION:
While trying to resolve module idb from file C:\Users\OG\Desktop\programming\react_native\mealstogo\MealsToGo2\node_modules\@firebase\app\dist\esm\index.esm2017.js, the ...
- 660
42
votes
6
answers
62k
views
How can I upload a photo with Expo?
I'm making an app with Expo and want to let the user take a photo or pick one from their camera roll and upload it to my server. How do I do this?
- 20.6k
28
votes
6
answers
25k
views
Expo get unique device id without ejecting
This library allows you to get unique device id / Mac address of Android devices, which doesn't change after reinstallation.
Expo.Constants.deviceId changes after every reinstallation (even if the ...
- 5,156
14
votes
5
answers
16k
views
Expo : cannot find a module LogReporter
I have created a React Native Project and I was trying to open that project in Expo XDE. It throws the following error:
Cannot find module ...\node_modules\expo\tools\LogReporter
Firstly I ...
- 890
4
votes
2
answers
27k
views
React Native Expo - Custom Fonts Not Loading With Font.loadAsync
I'm up to date on the latest Expo version but for some reason, I can not get a simple custom font going. Here is a fresh project I set up attempting to get a custom font installed.
import React, { ...
user14263509
4
votes
5
answers
8k
views
Getting the following error while executing expo init command
Installing dependencies...
npm WARN deprecated [email protected]: core-js@<2.6.5 is no longer maintained. Please, upgrade to core-js@3 or at least to actual version of core-js@2.
npm ERR! path git
npm ...
41
votes
7
answers
66k
views
How to reduce Android APK size in react-native?
I am working on react native project , but whenever i am building an Apk file , it give me Apk of 47MB.
I tried every documentation which i found useful on google but nothing works for me, Is there ...
- 490
15
votes
5
answers
20k
views
Can't find a variable atob
Screen1.js
import React,{useEffect} from 'react'
import {View,Text} from 'react-native'
import * as firebase from 'firebase/app';
import '@firebase/firestore';
const Screen1 = props =>{
...
- 818
15
votes
4
answers
19k
views
Cannot open phone call with Linking.openURL
Description
Cannot open phone call with Linking.openURL('tel:+123456789')
Environment
Environment:
OS: macOS High Sierra 10.13.4
Node: 8.5.0
Yarn: Not Found
npm: 5.8.0
Watchman: Not ...
user8815130
5
votes
3
answers
9k
views
Expo-Router Bottom tabs with nested Stack Screen
I am trying the new Expo-Router with a complex nesting navigation, currently i'm trying to display a screen with a presentation of modal, which itself is a part of a bottom tab navigation, but it is ...
- 1,659
3
votes
2
answers
2k
views
Fresh Detached Expo + RNFirebase not running on Android
So I'm trying to start an app using the Detached Expokit and React Native Firebase (v3)
I made a fresh project with exp cli,
followed all the instructions at https://invertase.io/react-native-...
3
votes
1
answer
3k
views
React native project with expo-localization and i18n-js
i am currently trying to implement localization depending on the system language of the device but something is not working as required.
I followed the exact same code on expo documentation, for eg. ...
- 763
1
vote
1
answer
746
views
expo auth session spotify get refresh token
I am trying to do spotify login via the expo-auth-session on my expo app
In the expo-auth-session doc,
https://docs.expo.dev/guides/authentication/#spotify
I understand that the auth code flow gives ...
- 41
136
votes
9
answers
240k
views
How can I clean (reset cache) of React Native using Expo. Not sure if it is cache issue
I am building a simple React Native app with create-react-native-app using only react-navigation and base-64(base 64 encode/decode) as dependencies. Over time starting the app became slower and now ...
- 4,861
107
votes
16
answers
159k
views
React Native iOS and Android folders not present
I'm new to react native, and I've been having some trouble understanding the folder structure of the app which should supposedly be present in the project folder on creation. Basically, when creating ...
- 1,235
74
votes
10
answers
117k
views
Implement pull to refresh FlatList
please help me out to implement pull to refresh on my app, I'm kinda new to react native, thanks. I don't know how to handle onRefresh and refreshing.
class HomeScreen extends Component {
state = { ...
- 821
68
votes
0
answers
48k
views
What is the difference between Expo CLI and React Native CLI? [duplicate]
React Native provides two way to create Project.
First:
npm install -g expo-cli
Second:
npm install -g react-native-cli
so what is different between them and what should be used if we create ...
- 2,191
66
votes
12
answers
194k
views
How do you format a number to currency when using React native Expo?
How do I take a number like 10000 and have it output as $10,000.00?
I even had a problem with String.format(...) with a Not a function error.
I followed numerous articles, all incomplete and none ...
- 1,388
58
votes
3
answers
84k
views
Invariant Violation: requireNativeComponent: "RNCSafeAreaProvider" was not found in the UIManager [closed]
Implementing React Navigate in the project installing the package npm install @react-navigation/native @react-navigation/stack shows the following error.
Can anyone help me with this issue?
- 863
45
votes
38
answers
157k
views
Can't load expo app: Something went wrong
I've created an expo app with exp init MyApp command and started it by running exp start in MyApp directory.
Then I'm scanning barcode which was printed in console with expo mobile app on android ...
- 10.4k
36
votes
13
answers
11k
views
Android Material and appcompat Manifest merger failed in react-native or ExpoKit
I updated 'android.support:appcompat-v7' to 28.0.0.
But it brought an error from the build.
Attribute application@appComponentFactory value=(android.support.v4.app.CoreComponentFactory) from [com....
- 13.8k
30
votes
6
answers
96k
views
React Native - navigation issue "undefined is not an object (this.props.navigation.navigate)"
Im following this tutorial https://reactnavigation.org/docs/intro/ and im running into a bit of issues.
Im using the Expo Client app to render my app every time and not a simulator/emulator.
my ...
- 873
28
votes
1
answer
30k
views
Converting Existing React Native Projects to Expo
I'm considering building mobile apps in React Native using Expo and I noticed under FAQ that existing React Native projects can be converted to Expo.
What exactly are we converting? I really like ...
- 29.2k
28
votes
8
answers
50k
views
React navigation 5 hide tab bar from stack navigator
I wanted to know how to hide the bottom tab bar from a specific screen inside my stack navigator that is nested on a material bottom tab bar
This is my code for my stack navigator
import React from '...
- 612
28
votes
19
answers
90k
views
"Command PhaseScriptExecution failed with a nonzero exit code" when archiving
so I have an app built with Expo but then ejected to get ios and android folder everything works fine on both android and ios I have published it for android but on ios when I try to archive the ...
- 735
27
votes
15
answers
47k
views
Expo LAN configuration doesn't work for New ReactNative Project
I have seen similar questions on Stackoverflow but none sorted the problem. I have just created new ReactNative project from Expo desktop app. But I can not run it on my Android phone via QR code scan ...
- 1,738
16
votes
3
answers
23k
views
Disable Debugging in Expo For React Native App
So I've opened up my react-native app in Expo today (using the iOS simulator) and I am creating by what looks like a debugging overlay.
Screenshot here:
I don't need this and it's blocking some of ...
- 2,262
15
votes
8
answers
110k
views
How to fire componentDidMount() or useEffect Hook on every visit to a page/screen?
So I have an app with an activity. The app checks for Internet connection at the beginning. If there are no Internet connection, it will show a screen with a button to refresh the page. The problem is ...
- 319
13
votes
4
answers
9k
views
How to use @expo/vector-icons dynamically through props in typescript react native app?
react native app with typescript and I'm trying to create icon button that uses @expo/vector-icons with Fontawesome or MaterialIcon dynamically by trying to pass a name as a string via props.
I think ...
- 135
13
votes
4
answers
48k
views
How to use google reverse geocoding with react native Expo?
I want to put in my application a button that when pressed return the current address of the cell phone.
The latitude and longitude I am able to return correctly, and to convert this data into an ...
- 518
11
votes
2
answers
5k
views
Firebase Firestore emulator on physical IOS / Android device
I'm trying to get the Firebase - Firestore database emulator to work on my physical IOS device via the Expo application while I develop.
I can get Localhost to work in a browser and 10.0.2.2:(8080) to ...
- 121
10
votes
3
answers
5k
views
Metro bundler with Expo dockerized app is not working
I'm trying to dockerize an Expo React Native app so anyone of my team partners could download the repo and then make a docker-compose up and without effort have the same expo server running in their ...
- 155
9
votes
3
answers
12k
views
expo-auth-session/providers/google Google.useAuthRequest
I have a problem with the implementation of Google Auth within a React Native app managed with Expo.
When I try to login, the response does not contain an IdToken or the information of the user and I ...
- 154