react-native-file-utils

Helper utils for common problems.

Utils:

• getPathFromURI : Convert Uri to real device path for Android
• Known paths for Android:
  • PicturesDirectoryPath : Internal pictures directory
  • DownloadsDirectoryPath : Internal downloads directory
  • DCIMDirectoryPath : Internal DCIM directory
  • CachesDirectoryPath : Application cache directory
  • FilesDirectoryPath : Application files directory

Installation (Android)

npm i react-native-file-utils --save

Linking

react-native link react-native-file-utils

OR

• android/settings.gradle

...
include ':react-native-file-utils'
project(':react-native-file-utils').projectDir = new File(settingsDir, '../node_modules/react-native-file-utils/android')

• android/app/build.gradle

...
dependencies {
    ...
    compile project(':react-native-file-utils')
}

• register module (in MainActivity.java)

import com.anumang.rnfileutils.RNFUPackage; // <------- add package

public class MainActivity extends ReactActivity {
   // ...
    @Override
    protected List<ReactPackage> getPackages() {
      return Arrays.<ReactPackage>asList(
        new MainReactPackage(), // <---- add comma
        new RNFUPackage() // <---------- add package
      );
    }

Example usage (Android only)

// require the module
var RNFU = require('react-native-file-utils');

RNFU.getPathFromURI(uriString).then(filePath =>
  console.log(filePath)
)

Use Case - get images from CameraRoll as base64

• Required: react-native-fs https://github.com/johanneslumpe/react-native-fs

RNFU.getPathFromURI(imageUri).then(path =>
  RNFS.readFile(path, 'base64').then(imageBase64 =>
    console.log(imageBase64)
  )
)

Use Case - create images on DCIM directory as base64

• Required: react-native-fs https://github.com/johanneslumpe/react-native-fs

let filePath = RNFU.DCIMDirectoryPath + fileName;
RNFU.writeFile(filePath, base64Content, 'base64').then(path =>
  RNFS.readFile(path, 'base64').then(imageBase64 =>
    console.log(imageBase64)
  )
)