android tv -Reloading adapter data

Question

I want to re-load some of the rows data in a browse fragment.

Basically I want to reset the adapter data without causing a flash like effect in the browse fragment. Any idea how it can be done?

Something like notifyDataSetChanged() in list view.

Thanx

Answer 1

This will refresh data without losing current position:

for (int i = 0; i < mAdapter.size(); i++) {
    ListRow listRow = ((ListRow) mAdapter.get(i));
    ArrayObjectAdapter listRowAdapter = ((ArrayObjectAdapter) listRow.getAdapter());
    if (listRowAdapter.size() > 0) {
        listRowAdapter.notifyArrayItemRangeChanged(0, listRowAdapter.size());
    }
}

Answer 2

You can create your own adapter and add a new replaceAll() method.

public void replaceAll(Collection items){
 int itemsCount = items.size();
 if (itemsCount == 0){
    return;
 }
 mItems.clear();
 mItems.addAll(index, items);
 notifyItemRangeChanged(0, itemsCount);
}

complete source:link

Answer 3

I answered something similar in this question: Dynamically add more cards in a list Row android TV leanback

I'll copy my answer from there. Hopefully this helps.

To add items to a presenter;

CardPresenter channelCardPresenter = new CardPresenter();
ArrayObjectAdapter channelRowAdapter = new ArrayObjectAdapter(channelCardPresenter);
channelRowAdapter.add(new Movie("Movie Title"));
HeaderItem header = new HeaderItem(0, "My Channels");
mRowsAdapter.add(new ListRow(header, channelRowAdapter));

Of course this may only work for the first time you're creating the UI. Future times may not do this. In my app, CumulusTV, I create a method that will be called each time I want to do a full redraw of the app:

public void refreshUI() {
    prepareBackgroundManager();
    setupUIElements();
    loadRows(); //Generate and populate all the rows
    setupEventListeners();
}