how to create database and save data of two activities on click of a button in the second activity

I have two activities

In activity1 - a phone number edittext and a name edittext with a NEXT button to go to activity2.

In activity2 - a radio group with two radio buttons and an edittext with a submit button to save all activity1 and activity2 edittexts and radiobuttons into database.

First of all I would like to know how to create a database in android eclipse java app? Please help.