Expo async file download

Already have an account? Sign in to comment. Linked pull requests. You signed in with another tab or window. Reload to refresh your session. To move a file from the app-controlled FileSystem. Notice that you need to check if the album exists before calling addAssetsToAlbumAsync. The album will be created and the asset will be added, no need to call addAssetsToAlbumAsync after that.

But this only takes care of downloading the files. If there is no file at this URI, a new one is created. If there is a file at this URI, its contents are replaced. The directory for the file must exist.

The keys and values of the object are the header names and values respectively. Provided for convenience since it is common to check the integrity of a file immediately after downloading.

Determines if tasks can be handled in the background. On Android, sessions always work in the background and you can't change it.

Defaults to FileSystemSessionType. Returns a Promise that resolves to an object with the following fields:. Upload the contents of the file pointed by fileUri to the remote url. The file must exist. Default to 'POST'.

Default to FileSystemUploadType. Defaults to the file name without an extension. If not provided, the module will try to guess it based on the extension. They will be located in the request body. Create a DownloadResumable object which can start, pause, and resume a download of contents at a remote URI to a file in the app's file system. Please note: You need to call downloadAsync , on a DownloadResumable instance to initiate the download.

The DownloadResumable object has a callback that provides download progress updates. Downloads can be resumed across app restarts by using AsyncStorage to store the DownloadResumable. The savable object contains the arguments required to initialize a new DownloadResumable object to resume the download after an app restart.

An object with the following fields are passed:. Note : When the app has been moved to the background, this callback won't be fired until it's moved to the foreground. Stack Overflow for Teams — Collaborate and share knowledge with a private group.

Create a free Team What is Teams? Collectives on Stack Overflow. Learn more. Expo Download file. Asked 7 months ago. Active 6 months ago.

However, I am not able to show the downloaded file to the user. The expected behaviour should be like we usually see notification icon on the status bar and on click on icon its opens your file.

This one had one or two tricks, but here is a solution to this using Expo that works on both iOS and Android. Once the file is downloaded, either a customisable toast is shown to the user if the app is active Expo currently does not support foreground notifications , or sends a local Push Notification to let the user know the download has finished.

The forked repo makes this functionality available before the merge request is implemented in the original. I recommend switching back to the original one once it gets patched as I will likely not maintain mine. Although this project is also available in Snack, it will not run due to the need of using a git repository in package.

This would be fixed by either the merge request or the new feature in Snack. Other file types may be supported, either by Expo itself or via external packages, such as this PDF viewer. However, the code will have to be further adapted. The toast internal notification is created with a TouchableWithoutFeedback component, although there are other similar ones in React Native with various differences. This component can be customised in the code search for toastDOM , but might even be replaceable in the future by internal notifications available in Expo.

Lastly, an intentional three-second delay is applied to the notification once the file is downloaded — this allows us to test the notification when the app is in background. Feel free to remove the delay and trigger the notification immediately. And that's it!