Hello piyush,
how did you create the database in your application

If you did it like this:
Using java Syntax Highlighting
public SQLiteDatabase createDatabase(String name, int version, int mode, CursorFactory factory)
// Create a new private SQLiteDatabase associate with this Context's application package. Throws FileNotFoundException if the databse could not be created.
Parsed in 0.030 seconds, using
GeSHi 1.0.8.4
You can delete it with the following call:
Using java Syntax Highlighting
public boolean deleteDatabase(String name)
// Delete an existing private SQLiteDatabase associated with this Context's application package.
Parsed in 0.030 seconds, using
GeSHi 1.0.8.4
The functions come from a
superclass of Activity (
(Application)Context), so you can call it in any function of your Activity.
Tell us if that helped you

Regards,
plusminus