Nexmo - how to implement verification by sms?

Question

Android

Good afternoon! One project with SMS verification during registration is under development. Chose Nexmo. It is very strange, but in the documentary they did not find a visual example of code for Android.
Example: when registering, a user enters his phone number and an SMS with a confirmation code is sent to this number. And the application should automatically catch SMS. Well, like many messengers.
Who has had a similar experience? We kindly ask you to share. Thank you!