iPhone/Android Nearby Filesharing Systems Across Platforms
Currently, it is not possible as AirDrop uses Bluetooth to create a peer-to-peer Wi-Fi network between the devices.
But here are some ways Android and iPhone/iOS users can share files with each other:

1.Use email
2. Use an app to share locally Like Zapya or Shareit
3. Use an app to share semi-locally
4. Use an online file-transfer service


Or you can jailbreak you i-device then use your Bluetooth connection to share data between i-devices and  others.