Android date SQLite SimpleDateFormat Calendar

with a query, I get a value of "date" from the SQLite
database, in the format "YYYY-MM-DD". Now I want to convert this format to display the
date in the format getInstance (). How can I
do?

 DateFormat
            fmtDateAndTime=DateFormat.getDateInstance(); 
 GregorianCalendar dateAndTime =
            (GregorianCalendar)
            GregorianCalendar.getInstance();

I
get the date:

private void Mto()
            {
 String id_ricevuto = (i.getStringExtra("id_p")); 


            SQLiteDatabase db = mHelper.getReadableDatabase();
 String tabella = "SELECT
            _id, date FROM Table1 WHERE _id = '"+id_ricevuto+"'";
 Cursor c =
            db.rawQuery(tabella, null);

 while (c.moveToNext()){

            String id = c.getString(0);
 String date = c.getString(1);
 //here I
            want to convert the data before displaying it in the TextView 

            idw.setText(id);


            mBtnPickDate.setText(date);



            }


 c.close();

            db.close();
}