How to pass the variable value in place of the site through android studio?

Hello, I started this not long ago and the question or where the answer is not found...
Is there a website, take a conditional Vkontakte, I need to get a string where I typed the button was passed on the value to a string on the website, does anyone know how this issue, please show, in the illustrative example, it is easier to understand all of it
April 3rd 20 at 18:31
1 answer
April 3rd 20 at 18:33
You will need:
1. Read what the api
2. Read about POST and GET requests
3. To use one of popular libraries for working with http, for example okhttp:

Find more questions by tags JavaAndroid