具有SimpleCursorAdapter的ListView

Question

in my app i am using a listview to display a menu of dishes with their Dish Names

This is the code where i bind the data from the query to the listview using the adapter:

private void getDishes() {

    DBAdapter db = new DBAdapter(this);

    db.open();
    Cursor cursor = db.getAllDishes();
    cursor.moveToFirst();
    Log.w("ppp","kk - " + cursor.moveToFirst());
    SimpleCursorAdapter adapter = new SimpleCursorAdapter(this,
            R.layout.list_item, cursor, new String[] { DBAdapter.DishName },
            new int[] {R.id.dishName });

    setListAdapter(adapter);
    db.close();
}

My Query code looks like this:

public Cursor getAllDishes()
{
    return db.query(DATABASE_TABLE, new String[] {DishName},null,null,null,null,null);
}

Really appreciate any help/comments as i have been stuck on this for almost a week now.

Answer 1

Can you explain explicitely what's your problem?

My suggest change

    public Cursor getAllDishes()
{
    return db.query(DATABASE_TABLE, new String[] {DishName},null,null,null,null,null);
}

to

    public Cursor getAllDishes()
    {
    Cursor dishes = db.query(DATABASE_TABLE, new String[] {DishName},null,null,null,null,null);
if(dishes != null)
dishes.moveToFirst();
        return dishes;
    }

Then

in getDishes() method write like this

private void getDishes() {

    DBAdapter db = new DBAdapter(this);

    db.open();
    Cursor cursor = db.getAllDishes();
    SimpleCursorAdapter adapter = new SimpleCursorAdapter(YourActivity.this,
            R.layout.list_item, cursor, new String[] { DBAdapter.DishName },
            new int[] {R.id.dishName });
    setListAdapter(adapter);
    db.close();
}