we should open and close database before and after use of database
public void insert()
{
db.open();
Cursor cr = db.Settings();//db is object of database
if (cr == null)
otd.insert_setting(value + "", save_path, option);
else {
otd.delete_setting();
otd.insert_setting(value + "", save_path, option);
}
db.close
}