i'm trying to create an android app to admin my university resources (exams, etc..) but i realized that there is not a simple login, like most of the other websites (one textbox for the username, one textbox for the password, one button to submit, on the page). I'm asked to insert username and password through something like a dialogbox.
Here is a screenshot I took to show you what is about 
Now my question is, is there any way I can login to this server, without showing this page? (I want to ask the user to submit username and password via an activity, and login to the webserver underground, saving user and password for future access)