Method read

android/src/main/java/com/rnfs/RNFSManager.java:236–251

(String filepath, int length, int position, Promise promise)

  }

  @ReactMethod
  public void read(String filepath, int length, int position, Promise promise) {
    try {
      InputStream inputStream = getInputStream(filepath);
      byte[] buffer = new byte[length];
      inputStream.skip(position);
      int bytesRead = inputStream.read(buffer, 0, length);

      String base64Content = Base64.encodeToString(buffer, 0, bytesRead, Base64.NO_WRAP);

      promise.resolve(base64Content);
    } catch (Exception ex) {
      ex.printStackTrace();
      reject(promise, filepath, ex);
    }
  }

  @ReactMethod
  public void readFileAssets(String filepath, Promise promise) {