I launch the application, but unfortunately only a form with the name of the project is displayed, and I sent a get request, what's wrong?

Question

Android

I did everything right, downloaded the library, registered it in Gradle, but something went wrong

Answer 1

Give the code for sending the request, the response handler, describe the expected behavior... Psychics are all resting.

Answer 2

And something will go wrong, you better not continue