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 dev tools like XDE and exp.

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13 views

Error ComponentInfo Android Studio starting app

I created an app with expo, and some days ago I detached from it. When I run the command exp publish it works very well. I can test the app downloading from expo, and it works! Now, I need to build ...
0
votes
1answer
9 views

FormData is an object with an Array of Arrys

In JS, the FormData object lets you compile a set of key/value pairs to send using XMLHttpRequest. Unfortuantely, It is not doing that in my React Native Expo Application. When I declare a new ...
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1answer
15 views

React Native Expo: Update existing app without using OTA

I have published the app before using expo cli and let expo to handle all the credentials & apple certificates for me. And now I have changed the app name. How can i update the existing app? Where ...
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0answers
11 views

how to use crypto,web3 module in Expo SDK v32

I want to develop SDKVersion32 instead of SDKVersion30. I understand that expo-random, expo-crypto is currently under development. I refer to the link for web3 use, but it only works on ...
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0answers
11 views

React-native-swiper get blank image

Got a blank image return on the simulator but the autoplay can still function well. Here is my image and the full code and how I rendered it in my homescreen like this: View Slide/ /View Inside a ...
0
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0answers
22 views

smooth movement of user icon mapView google map react native

when I just set a mapView, the movement of the user is really not smooth, like big lags. I run it on android device. On ios simulator it works well. There are some configuration to do for android? ...
0
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0answers
20 views

How to use .obj files in expo three.js without AR module? [React Native Expo]

My problem is about how can I use .mtl and .obj files with expo three.js, but I don't want to use AR, I only want to use a simple canvas/View with the object rotating. This code is the think I want ...
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0answers
12 views

can't find variable :AppDevice

my image After I run expo start the web console open successfully and than when I run the simulator it shows the error What is the problem and how can I fix this?
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0answers
17 views

How to get Text or Button to register click events on top of an Expo map?

I am trying to have clickable text or a button on top of my Expo maps. My provider is google, and when I try to render text that is clickable on top of my maps it fails. The text shows up, but does ...
0
votes
1answer
26 views

Navigating After Fetch React [on hold]

I'm still in the process of learning React and come from an entirely different background. To put it simply, I would like to run a Fetch request and then, if successfully, take me to a different ...
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0answers
6 views

All the time undetermined expo push

When push notifications are requested, the response is always undetermined. const { status } = await Permissions.askAsync(Permissions.NOTIFICATIONS); Test run with Testflight ! [Evidence] (https://...
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vote
0answers
26 views

expo background push notfication in iOS

At first, I was worried that expo had a custom notification system (had me thinking "coulda had a p8", if you know the commercial like that, haha). In the end, I was impressed with how direct and easy ...
0
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2answers
12 views

Cannot connect remotely to WebSocket server with React App, running in Expo

I have been unsuccessful in trying to make a WebSocket connection between a React Native app client (running in Expo) and a NodeJs server, using the 'ws' websocket library on both sides. I have set ...
0
votes
1answer
15 views

Notifications.getExpoPushTokenAsync not working on Stand Alone iOS

I'm trying to my expo/react-native project to send push notifications to my server. It works on standalone Android, but not stand alone iPhone. The standalone iPhone app never sends the token. ...
0
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0answers
14 views

Error: Command failed: osascript -e tell app “System Events” to count processes whose name is “Simulator” (-1743)

after I run expo start the web console open successfully, but the iOS simulator can't work as usual Error installing or running app. Error: Command failed: osascript -e tell app "System Events" to ...
0
votes
1answer
33 views

ImageBackground component as a container of react-navigation router hiding all child components

I want to set a background image to all of the screens in my react native application, I am using ImageBackground component on the top level of my components tree like that: export default class App ...
0
votes
2answers
39 views
+250

react native expo how to show login page instead of home page

I'm using the default tab navigation app from the react native expo What I want to do is checking if user logined, by checking asyncstorage loginname value. in the home.js, ff there is no storage ...
0
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1answer
25 views

Having trouble fetching XML through React-Native

Been struggling for a while now trying to fetch data from xml url. This is the first time I've ever tried it and can't seem to figure it out. Any data I'm missing I can provide. I've tried to fetch ...
0
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2answers
27 views

Drag moving Animated.Image with react native

I'm making a short game with react native where one image at a time is moving from top to bottom of the screen using Animated. Now I need the moving image to be draggable so that I can programme the ...
-2
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0answers
17 views

How can we fix issue of app gets crashed on calling reverseGeocodeAsync with iOS

Hi I have a function where user can select address from Map by tapping on it, this function is in react native app with Expo and getting address I have user reverseGeocodeAsync function, which accept ...
0
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1answer
24 views

React native injection in webview to get information

I'm trying to get information from an http web page, on a webview. But lately the method no longer works: window.postMessage() Is anyone having the same problems? Some advice?
0
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2answers
10 views

Is that possible to use Interactive Push Notifications in ExpoKit?

Is that possible to use Interactive Push Notifications in ExpoKit? Or this feature is only available in pure Expo now?
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0answers
70 views

Unable to resolve “./utils/batch” from “node_modules\react-redux\lib\index.js”

This error appears when I started using react redux, I tried every solution I found online but nothing Changing react and react redux version I installed schedule, react 16.5 with redux 6.0.0 = ...
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0answers
12 views

Sharing Variables Between Sass and JS Code [Expo / React-Native]

our team is building an app with expo, we're not interested in ejecting at this time for simplicities sake. We are using sass modules in our react native app and it's been great so far. I have a ...
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votes
0answers
8 views

How to load a customMapStyle before default loads with navigator?

I created a react native app that utilizes a custom mapview. My question is, how do I load that custom style onto the map before my navigator navigates to the mapview? The issue here is that the ...
0
votes
1answer
16 views

React Native / Expo - Pass Image to Preview Screen

I am taking a picture with the Expo camera API -- //CameraScreen.js capture = async () => { if(this.camera){ this.camera.takePictureAsync() .then( (data) => { console....
0
votes
1answer
21 views

Why AsyncStorage will return “null” with react native?

Now, I am making a mobile app with react native and expo and try to use AsyncStorage to store a set of key and value. However, I can get "null" from AsyncStorage.get('key'); The code below is my code ...
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0answers
20 views

How to set up connection to FeathresJS server from Expo (react-native) app that use MobX

Is there any Expo-Feathers-MobX boilerplate? All I can find is boilerplates and projects based on react-native-cli which I couldn't get them to work on my machine. I'm trying to use FeathersJS server ...
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votes
0answers
16 views

Getting Duration of Video/Audio in react Native for Progress Bar Impmentation

I am currently implementing a react Native streaming app using expo version and I am having some difficulties. please feel free to answer any of the questions or just one and in any other of your ...
0
votes
1answer
12 views

How can I delete all builds expo.io?

I’d like to delete all android builds expo. How can I do that? This would help to quickly resolve some issue with signing errors upon profile changes. Right now I have created a different account to ...
0
votes
1answer
20 views

React Native: New screen after touching image using stack navigator

I am trying to learn React Native by creating an app. After I touch an image I want a new screen to be placed on top of the current screen. I think I want to use a StackNavigator after onPress? I've ...
0
votes
2answers
57 views

Update state of a single element ( rest defaulting to constants )

I am trying to make cards clickable and expandable, but when updating state, it occurs in all the cards . I just want to make the state change in only one card (the one on which the event occurred , ...
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vote
0answers
46 views

Nested react-navigation deep-linking with expo react native

We're trying to add deep-linking to our Expo react native app using Expo Linking that opens a specific path within the app using something like this: myapp://home/items/order-details. However, when ...
0
votes
1answer
20 views

Suppress launch logging in React Native app

Is there any way to suppress this from the log every time I launch my expo app: Running application "main" with appParams: {"rootTag":171,"initialProps":{"exp":{"manifest":{"slug":"F8-Elements","...
0
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0answers
11 views

Override Swipe Left on React Native Swiper

I'm currently using react-native-swiper with Expo for my project but am having trouble overriding the left swipe behavior to provide a custom transition. My Use Case: User can swipe up to view more ...
1
vote
1answer
25 views

react native expo how to require an image?

I'm learning react native expo I want to require an image from assets/images The image I want to require is noti.png I got this error What am i missing?
0
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1answer
12 views

How to use FileSystem.getInfoAsync() with Expo?

I'm trying to test if a file exists with expo. This is the expo doc : Returns If no item exists at this URI, returns { exists: false, isDirectory: false }. Else returns an object if (this._liste....
0
votes
1answer
40 views

How to use backBehavior: 'history' on my bottomtabnaviagor

I have a BottomTabNavigator in my Expo app as the initial page. Whenever I navigator to another screen and go back I want to have the last opened tab on the tabnavigator open. I have read that: '...
1
vote
2answers
33 views

How to use setTimeout from react-native inside a function?

I would like to use "setTimeout" to react native app but I don't know why I can get an error like setTimeout is not a function. Of course, I imported setTimeout from react-native. This is my code ...
0
votes
1answer
27 views

Is there a way I can detect text from an Image using Expo React Native?

I am working with Expo, React Native and I want to to be able to detect text from images. Is there an package i can work with to achieve this? I am using Expo camera module to snap the picture and ...
0
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0answers
16 views

React Native unable to link with Zo0r push notification library

I was trying to import zo0r/react-native-push-notification (https://github.com/zo0r/react-native-push-notification)library for my project. I first run react-native link react-native-push-notification ...
0
votes
1answer
27 views

Is there a way to decompile an apk built through Expo and open the resulting project in Android Studio?

I've been building some apps in react native using expo and wanted to see how the code looks in java in Android studio. I'm having trouble using decompiler(I've tried jadx, decompileandroid.com, and ...
0
votes
1answer
18 views

expo / turtle cli isn't update android versionCode when build (standalone app)

I'm building a standalone app using turtle cli, and i have a trouble with android versionCode in my app.json, turtle cli doesn't update it and cannot deploy to google play store I tried putting the ...
0
votes
1answer
15 views

How do I make the Expo Camera View Clickable

I am using the Expo Camera in React Native. I want to snap a picture when the Camera view is tapped. How do I do this? I have tried putting the TouchableOpacity inside the camera tag but when i try ...
0
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0answers
17 views

Trying to make expo links work behind a reverse proxy

I'm trying to make expo development pipeline work behind a reverse proxy, my setup for reverse proxying seems to work: curl http://packager.desk1.code.example.com yield me React Native packager is ...
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0answers
30 views

Problem with npm run eject on a new project with react-native

I've just created a project with react-native and I want to eject the expo. Then I get this error npm ERR! code ELIFECYCLE npm ERR! errno 1 npm ERR! @ eject: `expo eject` npm ERR! Exit status 1 npm ...
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votes
0answers
20 views

Building a Media Player in React Native expo and Getting duration of song

I am implementing a Media player in React Native expo. I have designed my player, play song, next and previous songs functionality but I am having an issue getting the duration of the song, in order ...
2
votes
2answers
24 views

SafeAreaView not working with MaterialTopTabNavigator at root

We use MaterialTopTabNavigator (https://reactnavigation.org/docs/en/material-top-tab-navigator.html) at the root of our application. According to the react-navigation documentation, there should be a ...
2
votes
3answers
684 views

How to fix '_react[“default”].memo is not a function. (In '_react[“default”].memo(connectFunction)' error in React native?

I am trying to connect Redux mapStateToProps() and mapActionCreators() to Login Screen through Container and I am using React navigation. After build my app the following error message appears: ...
0
votes
1answer
12 views

React native Expo - How I can change permission default message in Android

How I can change the message in the Dialog that request permissions in Android? I found a solution for IOs but not work for Android development.