Question

I have an arrayList “listItems” with multiple objects, each having an “Item Name” and “Item Price”.

I create a custom base adapter “adapterItems” and in my activity I set the adapter to the list

AdapterItems adapterItems = new AdapterItems(MyActivity.this, listItems);
listView.setAdapter(adapterItems);

Everything works fine and all the items are displated in my activity as a list view in the order the objects were added to the arrayList.

Now I want to sort this list by ascending order of item price.

I am ok to sort the listItems first before giving it to the adapter OR sort the listview adapter later on. How can I do either/both?

Answer 1

Use Comparable to sort your listview.

See this Example That compare name and sort it in Alphabetical order

in your case::

public class Item implements Comparable<Item> {

    public String name;
    public int price;

    public int compareTo(Item another) {
        return (this.price-another.price);
    }
}

And

Collections.sort(yourlist);