React-native expo file download

 · 3 Answers3. Show activity on this post. If using Expo, the following code should work for you. It creates a Sheet and then creates a Share dialog for the user to open it in which ever app they like like Email, Office, etc: import XLSX from 'xlsx'; import * as FileSystem from 'expo-file-system'; import * as Sharing from 'expo-sharing'; var data. Introduction to Expo. Expo is a framework and a platform for universal React applications. It is a set of tools and services built around React Native and native platforms that help you develop, build, deploy, and quickly iterate on iOS, Android, and web apps from the same JavaScript/TypeScript codebase.  · I've been using the default create-react-native-app and would like to continue to do so as long as I can without ejecting. The feature I need for the app is to download a file to the app cache using bltadwin.ruadAsync which stores the file to the local cache or temp directory. Next I need to share that file with any program that can open bltadwin.rus: 5.

React Native does not currently offer full support for downloading and showing a file. The approach in this article shows you how to download and display a file using the react-native-fs and react-native-webview libraries respectively.. In this example, the file is of a PDF format, however, the same approach can be used for images or other text file formats. // install module npm install react-native-webview // import the module import * as WebBrowser from 'expo-web-browser'; // then in your function you can call this function await bltadwin.ruowserAsync(file_ur); it will open preview of the file and then user can download using share button. Image. A React component for displaying different types of images, including network images, static resources, temporary local images, and images from local disk, such as the camera roll. This example shows fetching and displaying an image from local storage as well as one from network and even from data provided in the 'data:' uri scheme.

expo-file-system — For saving the file to app’s doc store before we share it; expo-sharing — For allowing the user to share / save the file to device; Getting the file from the server. My app is using a serverless function to create a PDF using puppeteer and then returning the PDF object. Retrieving Files As Blob in React Native (and Expo) Sometimes you may need to create a valid blob file from a remote file or a local file (for example, for uploading a screenshot to firebase storage). If the Blob object returned by the fetch API (e.g. blob = await fetch (`file://$ {local_uri}`).blob ()) is returning an empty type and/or 0 bytes. then try expo-file-system but i don't see any clear example of how to convert base64 and download it to mobile. UPDATE. I was able to do it, my purpose was to save the base64 of a QR and convert it to png and at the same time be able to share it, I did it using expo-file-system and expo-sharing. this is mi code.