Help needed regarding the databse in the android aplications

Hi all,

I am new to the android development. I have no idea about the databases used in the android development. when we create the application used the database, then         1)  where the database file is located

                2) how we get the access for that file.

                3) is there any way to get the UI view for the database.

Give me any example code for better understanding.

Thank you,

Varma.