Can an NFC device invoke Android google play to install automatically an application?

Question

Or in more general: How can I invoke an application download/installation in Android as a result of putting an external NFC/Bluetooth/BLE device near a phone?

Answer 1

I don't know about Bluetooth, but if you are using an NFC tag, you can encode an URL there to the app in Google Play so the user can download it. I think it is not possible to download it without user intervention.