Android data binding with custom adapter

Question

I'm trying to use Android's Data Binding features with a custom adapter and a ListView. I'm having trouble overriding the custom adapter's getView method:

public class ChecksAdapter extends ArrayAdapter<Check> {

    public ChecksAdapter(Context context, ObservableList<Check> checks) {
        super(context, R.layout.check, checks);
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        CheckBinding binding = DataBindingUtil.inflate(
                LayoutInflater.from(getContext()),
                R.layout.check, parent, false);
        binding.setCheck(this.getItem(position));

        // Return what?
    }
    
}

So my questions are:

• Where do I get the View element that I should be returning? Or in other words, how can I bind the object to an inflated/converted view?
• How can I reuse convertView when using data binding?
• Is this the correct way to implement this? The guide is not very clear on ListViews

Here's the only reference of ListViews in the guide:

If you are using data binding items inside a ListView or RecyclerView adapter, you may prefer to use:

   ListItemBinding binding = ListItemBinding.inflate(layoutInflater, viewGroup, false);
   //or
   ListItemBinding binding = DataBindingUtil.inflate(layoutInflater, R.layout.list_item, viewGroup, false);

Answer 1

You should do the following for smooth scrolling though..

@Override
public View getView(int position, View convertView, ViewGroup parent) {
    CheckBinding binding;
    if(convertView == null) {
        binding = DataBindingUtil.inflate(
                LayoutInflater.from(getContext()),
                R.layout.check, parent, false);
        convertView = binding.getRoot();
    }
    else {
        binding = (CheckBinding) convertView.getTag();
    }

    binding.setCheck(this.getItem(position));
    convertView.setTag(binding);
    return convertView;
}