public void addExpense(Expense exp) {
SQLiteDatabase db = this.getWritableDatabase();
ContentValues values = new ContentValues();
values.put(KEY_NAME, exp.getName());
values.put(KEY_DATE, exp.getDate());
values.put(KEY_SPENT_FOR, exp.getSpentFor());
values.put(KEY_COMMENT, exp.getComment());
values.put(KEY_AMT, exp.getAmt());
db.insert(TABLE_EXPENSES, null, values);
db.close();
};
