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Android

Posted by dlpuxdzztg
dlpuxdzztg
8,243 Points

ListAdapter inflating multiple objects.

Hello.

I was wondering if there was a way for a ListAdapter to inflate multiple objects within its getView() function. If I had a 'Letters' object and 'Numbers' object and I want to inflate them in the same list, with a single adapter, how would I do it?

Thanks!

1 Answer

Kourosh Raeen
Kourosh Raeen
23,733 Points
Kourosh Raeen
Kourosh Raeen
23,733 Points

Hi Diego - I think you can create a custom adapter by extending the BaseAdapter class similar to this tutorial: https://guides.codepath.com/android/Using-a-BaseAdapter-with-ListView

Change the adapter constructor in the tutorial to something like this:

private Context context; //context
    private ArrayList<Object> items; //data source of the list adapter

    //public constructor 
    public CustomListAdapter(Context context, ArrayList<Object> items) {
        this.context = context;
        this.items = items;
    }

Since items is an ArrayList of type Object you should be able to use it for both objects of type Letters and Numbers. You probably need to add code in your adapter to determine which of type of object you are dealing with, using the instanceof operator, so that you can properly cast it to that type.

Hope this is helpful.

dlpuxdzztg
dlpuxdzztg
8,243 Points

Thanks! But what I meant to say was inflating multiple objects in the ListView, I should probably fix that.

Kourosh Raeen
Kourosh Raeen
23,733 Points
Kourosh Raeen
Kourosh Raeen
23,733 Points

Can you create a custom class that includes the other two as member variables? That way you give the adapter an ArrayList of the new class. This is the only thing that comes to my mind right now.

dlpuxdzztg
dlpuxdzztg
8,243 Points

Ah, okay. But what if I want to use a ViewHolder to display each object?