Question Detail

I am not getting your point what actually you want. I think you need a android form to login from web Services, 

You have to use an endpoint (URL) Which is responsible to user login.

To hit that login url (provided by any web Application Developer) as web Services.

You need to use AsyncTask , Volley and Retrofit anyone from listed 

Please elaborate your issue below I'll work for you.

Try to elaborate your android login webservice

Android SDK provides several api’s for developers to save user and app data, So SQLite is one of the way of storing data

This provides relational database management structure for storing user defined records in the form of tables.