All Questions
2,191
questions
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
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
50
votes
9
answers
37k
views
expo + react-native: There was a problem sending log messages
I am building a react-native app that I recently moved to expo. The app seems to display the expected screen, but before it completes, I am receiving the following error message: console.error: "...
- 1,785
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
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
36
votes
5
answers
10k
views
RTL is forced in RTL devices
The new version of React Native has issued support for RTL devices:
https://facebook.github.io/react-native/blog/2016/08/19/right-to-left-support-for-react-native-apps.html
However, it seems that in ...
- 5,785
33
votes
4
answers
19k
views
Camera Preview in Expo is Distorted
I'm using Camera that comes from expo package and I'm having trouble with camera preview distortion. The preview makes images appear wider in landscape view and thinner in portrait view. Most of the ...
- 525
32
votes
4
answers
55k
views
How to build expo apk using eas build
After updating expo it no longer supports building apk files using expo build:android -t apk and instead advices to using eas builds using the command eas build -p android --profile preview but it ...
- 556
32
votes
6
answers
61k
views
How to build Expo APK local
Is it possible to build the APK of an expo app locally?
The doc says:
If you haven’t used exp before, the first thing you’ll need to do is login with your Expo account using exp login.
I tried ...
- 1,387
29
votes
4
answers
81k
views
Expo run on android emulator using windows 10
Can I run android emulator without an android phone? I have installed android studio and I've already installed android virtual device. However, when I try to run it, it gives an error like this :
...
- 1,715
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
25
votes
12
answers
27k
views
Expo React-Native Android build not updating Version Code for Google Play
I built a React-Native android app and uploaded to Google Play, which worked fine.
Now I have a new build I am trying to upload (had no issues uploading to itunes Connect), and Google Play is giving ...
- 393
22
votes
15
answers
26k
views
How to fix jlink does not exist?
i am working with react native and am trying to use expo in a bare project but whenever i try to run the app with the command npm run android, i get this error :
Execution failed for task ':expo-...
- 412
22
votes
3
answers
28k
views
How do I force an expo app to update
I have an app written in expo, and can't figure out how to push a new build. On the expo site if I run the app from the QR code the app is correct, but the native app from the app store doesn't update....
- 1,060
22
votes
4
answers
7k
views
com.segment.analytics.android:analytics error while submitting my app to Google Play Console
I am trying to submit my React Native EXPO app to Google Play Store for approval, but I am getting this error:
SDK Segment Analytics Android (com.segment.analytics.android:analytics), 4.9.4 collects ...
- 231
21
votes
4
answers
9k
views
react-native swipeable gesture not working on android?
I am doing a react native course with Mosh (https://codewithmosh.com/). I am using expo. I am very new to react native and don't really know what I am doing, but I know my code should work. I double-...
- 938
21
votes
1
answer
3k
views
Setting up Detox with Expo on Android
I'm trying to set up Detox with Expo on Android emulator (Genymotion) but I have an error that I can't go through....
I've installed the necessary packages :
Detox
detox-expo-helpers
expo-detox-...
- 320
20
votes
21
answers
63k
views
Could not load exp:// Something went wrong
I have created a project using Expo XDE. I checked this Can't load expo app: Something went wrong but I have already enabled "Draw over other apps". It works https://expo.io/@ajaysaini/first-proj ...
- 34.2k
20
votes
20
answers
39k
views
Can't connect my Android Phone in Expo React Native Project
I'm using Expo App in my Android Device to connect into the my Laptop's Expo (Signed in both my same Expo's Account)I am also connected in the same network. Then I scanned my code then after that it ...
20
votes
1
answer
13k
views
How do I create a diagonal border in React Native?
I'm working on building a React Native app based on designs from our designer. The design has several places where there are buttons or shapes with one diagonal line (see the following example). I'...
- 1,732
20
votes
2
answers
24k
views
Your app currently targets API level 30 and must target at least API level 31 to ensure it is built on the latest APIs
I was just trying to deploy an app on google play store and got this error.
How do I change my target api to 31. I am aware it needs to be changed in build.gradle file under android/
This is mine:
ext ...
19
votes
2
answers
8k
views
React Native Expo StackNavigator overlaps Notification bar
I am trying to implement navigation bar for my React Native Expo app. Here is a problem:
"dependencies": {
"expo": "^18.0.3",
"react": "16.0.0-alpha.12",
"react-native": "^0.45.1",
"...
- 43.9k
18
votes
1
answer
16k
views
How to get sha256_cert_fingerprints for assetlinks.json for Expo?
Instructions for android universal deep links requires you to upload .well-known/assetlinks.json for verification. Expo deep linking documentation points you to format the file per official android ...
- 1,469
18
votes
9
answers
16k
views
31.0.0 is not a valid SDK Version. Option are 26.0.0 Unversioned
I can no longer run my app after updating expo version to 31.0.0. I needed this upgrade to do due iOS version 12 support. Thou after trying to build the Android app it is no longer working.
my ...
- 2,270
18
votes
5
answers
7k
views
How to Build 64-bit native code for android using Expo CLI
I am using react-native and EXPO CLI to build the android apk file. But i cant upload to Play store. I get a warning message
Warning This release is not compliant with the Google Play 64-bit ...
- 404
17
votes
8
answers
15k
views
Error running adb: Error running app. Error: Activity not started, unable to resolve Intent
Hi I am trying to run 'yarn android' on my react-native project. And am running into the following error:
yarn android v0.27.5
$ react-native-scripts android
10:37:45 AM: Starting packager...
10:39:...
- 401
16
votes
2
answers
9k
views
how to use expo eas build offline --no Internet required
Is there any way I can use expo eas build fully offline without requiring an Internet connection.
Maybe an offline package or ...
- 485
16
votes
5
answers
13k
views
Expo: don't show notification if app is open in foreground
I am developing a react-native messaging app with Expo. Every time a user receives a new message, I send a notification from my server.
Is there any way to not display the notification if the app is ...
- 4,948
16
votes
1
answer
2k
views
React Native in Expo: Asyncstorage gets cleared when app refreshes
This is going to be a dumb question cause I couldn't show any code as I don't what happened or where this is possible happening.
I have been developing a react native app for months now and from the ...
- 1,074
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
15
votes
3
answers
6k
views
Dark Mode: useColorScheme() always returns light on Android
I am trying to get Dark Mode to work and it doesn't work on Android. It always returns "light". On iOS it works fine.
import React from 'react';
import { useColorScheme } from "react-...
- 1,218
15
votes
1
answer
5k
views
Delay on the capture of an image - React Native Camera / Expo Camera
I am trying to realize the same functionnality as in Facebook or Instagram:
Preview the image taken by the camera instantly
At this point, my taken is correctly taken when this function is called :
...
- 1,667
14
votes
8
answers
18k
views
Admob : Ad serving is limited - The number of ads you can show has been limited. For details, go to the Policy center
I'm new to admob. I published my first android app (written in expo react-native). I followed the instructions https://docs.expo.dev/versions/latest/sdk/admob/ on including admob ads in my app. But ...
- 6,485
14
votes
4
answers
10k
views
How do I use react-native-google-mobile-ads with Expo and Expo Go?
How do I use react-native-google-mobile-ads with Expo and Expo Go? (e.g. Banner Ads)
A minimal example within the context of Expo would be very much appreciated.
All the online google documentation as ...
- 13k
14
votes
3
answers
20k
views
class was expected (declaration of 'com.google.android.gms.location.FusedLocationProviderClient') in react native
This was working fine earlier.
Possible Unhandled Promise Rejection (id: 0):
Error: Encountered an exception while calling native method: Exception occurred while executing exported method ...
- 151
14
votes
2
answers
9k
views
Expo cannot open development build on android emulator
I'm trying to run my Expo managed project on Android simulator with npx expo run:android.
I have expo-dev-client installed.
When I run npx expo run:android, it fails with the message:
CommandError: ...
- 864
13
votes
2
answers
12k
views
React native Expo Version code 1 has already been used. Try another version code
After updating my app I am trying to upload my expo app to the playstore but getting error again and again. I changed the version in app.json version": "2.0.0" and also try this version&...
- 967
13
votes
1
answer
42k
views
Why React-Native Couldn't start project on Android connection with Expo?
Couldn't start project on Android.
Error : No Android connected device found, and no emulators could be started automatically.
Please connect a device or create an emulator (https://docs.expo.io/...
- 131
13
votes
4
answers
3k
views
Load custom native component in react native using expo kit
Im trying to load a custom Android WebView to be able to upload files using html file inputs (by default Android webview wont work with input file). Im using this code, the only difference is that im ...
- 6,034
13
votes
6
answers
19k
views
Execution failed for task ':expo-permissions:compileDebugKotlin'
I am working on a React Native app where I included some expo libraries (bare workflow). I had successfully used expo-location, but now after I installed also expo-camera, the app won't build anymore ...
- 131
13
votes
2
answers
3k
views
Expo audio recording webm
I am using expo and I am trying to record on android by using the webm output format ( Expo.Audio.RECORDING_OPTION_ANDROID_OUTPUT_FORMAT_WEBM ). My issue is that I have tried all the different ...
- 3,053
13
votes
1
answer
2k
views
How to handle a share intent(sending an image) in the expo app?
Is there any way to handle sharing files to expo app? According to the documentation of app.json it's possible to provide intentFilters, but I can't find anything regarding handling them afterwards.
...
- 450
12
votes
5
answers
8k
views
How to forbid Tablet usage in expo / react-native?
I have developed an app with Expo and react-native for Smartphones - now I am trying to upload the ".aab" file to the Google Play Store - however it seems like it will be available for tablet and ...
- 3,663
12
votes
2
answers
4k
views
Expo - Network Response Time Out Error (create-react-native-app) (Windows 10)
I have the exact same problem as here: Network Response Time Out Error (create-react-native-app) (expo). Every time I try to scan the QR code from my phone on LAN, I get the network response timeout ...
- 789
12
votes
1
answer
729
views
How to use Google Play pre-launch report with expo / react-native
Google has a built in app crawler for the app store called the pre-launch report.
It will crawl your app on a bunch of different devices and give you some basic feedback assuming you:
provide ...
- 387
11
votes
8
answers
41k
views
Value for title can not be cast from ReadablenativeMap to string
Consider:
InsertDataToServer = () => {
const { pinValue1 } = this.state;
const { pinValue2 } = this.state;
const { pinValue3 } = this.state;
const { pinValue4 } = this.state;
var String_3 ...
- 564
11
votes
10
answers
13k
views
ERROR TypeError: _RNGestureHandlerModule.default.flushOperations is not a function (it is undefined), js engine: hermes
I create the React Native Expo Mobile app. I got this error in android ERROR TypeError: _RNGestureHandlerModule.default.flushOperations is not a function (it is undefined), js engine: hermes.But,Not ...
- 103
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
11
votes
3
answers
23k
views
How to change api level 29 to 30 in expo react native App
This Message was appear when i upload my app bundle to play store
Your app currently targets API level 29 and must target at least API level 30 to ensure it is built on the latest APIs optimized for ...
- 183
11
votes
7
answers
17k
views
Expo React Native App crashing on android
Ever since I started programming in React Native with Expo, I have been using an ios physical device together with Expo app. I never had any major issues.
Now i wanted to start fixing any bugs on ...
- 323