Expo + react-native-fs

[sebastianbochan]

Description

In my application I am not able to run it with linked modules.

Expected Behavior

React native should link module.

Observed Behavior

I need to open files from local system. In npm, there is library like react-native-fs but still receive error.

undefined is not an object (evaluating 'RNFSManager.RNFSFileTypeRegular')

How to add module?

1. npm install react-native-fs
2. react-native link react-native-fs

It seems that expo ignores "linked" modules to react-native.

[jobpaardekooper]

Checkout expo's FileSystem module to use file system related functionality using expo Go.

[kunduaditya]

Hey man React-Native-FS is not supported with Expo but it is only supported by Pure React Native

[tannyb28]

Hey man React-Native-FS is not supported with Expo but it is only supported by Pure React Native

Do you know of an alternate package that I could use? I need to create a copy of a local ios image so I can add to an s3 bucket, but I don't know how else to create a copy of the file.

[danishsshaikh]

Hey man React-Native-FS is not supported with Expo but it is only supported by Pure React Native

Do you know of an alternate package that I could use? I need to create a copy of a local ios image so I can add to an s3 bucket, but I don't know how else to create a copy of the file.

Any solution or any alternate package you came across?

[jobpaardekooper]

I don't know why people aren't seeing my fist comment on here (maybe because I linked the package on the expo repo and not their docs) but I will post it again because people keep coming back here. Expo has a package that offers filesystem support:

https://docs.expo.dev/versions/latest/sdk/filesystem/

Good luck!

[mrazabinabid]

is there no way to access the data/project folder of the app in expo ? What i came to know is there is only FileSystem.documentDirectory and FileSystem.cacheDirectory available in expo-file-system to access my requirements in android are Download File change location of files upon download extract file to a specific folder read sqlite db file from the project folder

I cant use the documentDirectory or cacheDirectory as i cant access them, can't see the downloaded file in the either directories

[jobpaardekooper]

Seems like this should be possible with expo-file-system what exactly are you stuck on? Maybe post a small code snippet that isn't working.

[harshdew02]

but expo audio does not support MP3 and WAV file formats so handing that we need to use react-native-fs. how do we use expo audio for MP3 file formats???

Seems like this should be possible with expo-file-system what exactly are you stuck on? Maybe post a small code snippet that isn't working.

[jobpaardekooper]

As far as I know expo audio does definitely support WAV files because I have an app that is playing them using expo audio. I would also expect it to support MP3 files. Why would you need react-native-fs to handle those files? The AVPlaybackSource section in the expo-av docs includes some more info on the supported formats per platform.

Here is a code example code of how I am playing WAV files.

const sound = new Audio.Sound()

console.log("Loading audio file")
await sound.loadAsync({ uri: pathToAudio })
console.log("Audio file loaded", pathToAudio)

console.log('Playing Sound')
await Audio.setAudioModeAsync({
    allowsRecordingIOS: false,
    playsInSilentModeIOS: true,
    interruptionModeAndroid: InterruptionModeAndroid.DoNotMix,
    interruptionModeIOS: InterruptionModeIOS.DoNotMix,
    playThroughEarpieceAndroid: false,
    shouldDuckAndroid: false,
    staysActiveInBackground: false
})
await sound.playAsync()

Make sure the pathToAudio is correctly formatted starting with file:/// and make sure the file is actually at that location.

I don't think you need to set all of those options like I do at the end but I am providing it here so you can try it exactly like I have it. (which is working). And then after you confirm this is working you can adapt it it to work how you want it.

[harshdew02]

but by using expo we can not record audio in WAV or mp3 file. is there any solution for that in Expo ??

[jobpaardekooper]

I see...

You can record using MP3 (on iOS only) if that is something that helps. But probably not.

I think your best bet, if you must for some reason stick with expo go, is to upload the audio to a server and covert it there to the format you need.

[gabrielyotoo]

Expo File System doesn't support access to folders outside the app eg Android's Dowload folder. I need to save a PDF file in a directory that users can access trough their OS' file management system and Expo File System doesn't look like to support this

[jobpaardekooper]

That is interesting. Did not realize it was so hard to do something like that. I found a tutorial that might work for sharing the files outside of your apps directories.

[gabrielyotoo]

I used the example in this comment and it worked just fine!

Apparently, Expo Media Library can't handle PDF files

[jayprakash977]

That is right man why the hell they have created this expo in first place if it does not support to mobile device storage

[jayprakash977]

I don't know why people aren't seeing my fist comment on here (maybe because I linked the package on the expo repo and not their docs) but I will post it again because people keep coming back here. Expo has a package that offers filesystem support:

https://docs.expo.dev/versions/latest/sdk/filesystem/

Good luck!

Man people are asking for functionality to write file and read file from mobile storage not get limited within app file system