Question

I have discovered a few issues with ListViews in Mono for Android that may be bugs. I have posted a fairly-simple project that demos both of these issues in more detail here:
Example Project

I’m wondering if I’m doing something wrong or if these are legitimate bugs.

---

First, if you try to use an inflated view as the footer view for a ListView by calling AddFooterView it throws a ClassCastException. Using a dynamically-created view works fine but you can’t apply styles to a dynamically created view.
So this works fine:

goodButton.Click += delegate {
    TextView tv = new TextView(this);
    tv.Text = "THIS IS THE LIST FOOTER";
    listView.AddFooterView(tv);
    listView.Adapter = adapter;
    Toast.MakeText(this, "Footer was added...", ToastLength.Short).Show();
};

But this throws ClassCastException:

TextView footerViewButton = FindViewById(Resource.Id.listFooterButton) as TextView;
badButton.Click += delegate {
    listView.AddFooterView(footerViewButton);
    listView.Adapter = adapter;
    Toast.MakeText(this, "Custom Footer was moved...", ToastLength.Short).Show();
};

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Second, if you create a ListView and set an ItemClick handle, then call NotifyDataSetChanged() on the ListView the ItemClick event is no longer fired:

protected override void OnCreate(Bundle bundle) {
    base.OnCreate(bundle);
    SetContentView(Resource.Layout.ItemClick);
    ListView list = FindViewById(Resource.Id.itemClickList) as ListView;
    mAdapter = new CustomAdapter(this, Countries);
    list.Adapter = mAdapter;
    list.ItemClick += new EventHandler<ItemEventArgs>(list_ItemClick);
}

The CustomAdapter calls this method in the activity when the last view in the list is rendered:

public void GetMoreListItems() {
    if (mAdapter.Count < Countries.Length + MoreCountries.Length) {
        string[] allCountries = new string[Countries.Length + MoreCountries.Length];
        Countries.CopyTo(allCountries, 0);
        MoreCountries.CopyTo(allCountries, Countries.Length);
        mAdapter.NotifyDataSetChanged(allCountries);
        Toast.MakeText(this, "New items were loaded. Now Click action is broken.", ToastLength.Short).Show();
    }
}

Answer 1

1) issue is not a bug. If you want to use styles for you footer view you can create xml layout for it and then use LayoutInflater to instantiate it and add as footer view to your list.

var footerView = LayoutInflater.Inflate(Resource.Layout.footerView,null);
listView.AddFooterView(footerView);

2) I also had problem with it and i have spent some time trying to find the problem. After all i decided to ignore it and use NotifyDataSetChanged() method without parameters. And to update the adapter i have created method something like .SetItems(IEnumerable<TItem> items). So my code looks like this:

var newItems=Service.LoadNewItems();
adapter.SetItems(newItems);
adapter.NotifyDataSetChanged();

And all works fine for me. ListItemClick delegate is invoking.