Allow only PHP request from Android App

Question

I have some PHP pages that receive POST requests and make CRUD operations in my MySQL database...

I would like to know if there is a way to allow only my Android applica

Answer 1

I would store a secret key in your app and send that along with the request to log the user in. This secret key would be stored on the server and compared at login. If the key matches and user is authenticated then log user in.