How to use

notifyAdapterItemRangeChanged

method

in

com.mikepenz.fastadapter.FastAdapter

/**
 * wraps notifyItemRangeChanged
 *
 * @param position  the global position
 * @param itemCount the count of items changed
 */
public void notifyAdapterItemRangeChanged(int position, int itemCount) {
  notifyAdapterItemRangeChanged(position, itemCount, null);
}

/**
 * wraps notifyItemChanged
 *
 * @param position the global position
 * @param payload  additional payload
 */
public void notifyAdapterItemChanged(int position, @Nullable Object payload) {
  notifyAdapterItemRangeChanged(position, 1, payload);
}

  @Override
  public boolean notify(FastAdapter fastAdapter, int newItemsCount, int previousItemsCount, int itemsBeforeThisAdapter) {
    //now properly notify the adapter about the changes
    if (newItemsCount > previousItemsCount) {
      if (previousItemsCount > 0) {
        fastAdapter.notifyAdapterItemRangeChanged(itemsBeforeThisAdapter, previousItemsCount);
      }
      fastAdapter.notifyAdapterItemRangeInserted(itemsBeforeThisAdapter + previousItemsCount, newItemsCount - previousItemsCount);
    } else if (newItemsCount > 0 && newItemsCount < previousItemsCount) {
      fastAdapter.notifyAdapterItemRangeChanged(itemsBeforeThisAdapter, newItemsCount);
      fastAdapter.notifyAdapterItemRangeRemoved(itemsBeforeThisAdapter + newItemsCount, previousItemsCount - newItemsCount);
    } else if (newItemsCount == 0) {
      fastAdapter.notifyAdapterItemRangeRemoved(itemsBeforeThisAdapter, previousItemsCount);
    } else {
      //this condition should practically never happen
      fastAdapter.notifyAdapterDataSetChanged();
    }
    return false;
  }
};

  @Override
  public boolean notify(FastAdapter fastAdapter, int newItemsCount, int previousItemsCount, int itemsBeforeThisAdapter) {
    //now properly notify the adapter about the changes
    if (newItemsCount > previousItemsCount) {
      if (previousItemsCount > 0) {
        fastAdapter.notifyAdapterItemRangeChanged(itemsBeforeThisAdapter, previousItemsCount);
      }
      fastAdapter.notifyAdapterItemRangeInserted(itemsBeforeThisAdapter + previousItemsCount, newItemsCount - previousItemsCount);
    } else if (newItemsCount > 0) {
      fastAdapter.notifyAdapterItemRangeChanged(itemsBeforeThisAdapter, newItemsCount);
      if (newItemsCount < previousItemsCount) {
        fastAdapter.notifyAdapterItemRangeRemoved(itemsBeforeThisAdapter + newItemsCount, previousItemsCount - newItemsCount);
      }
    } else if (newItemsCount == 0) {
      fastAdapter.notifyAdapterItemRangeRemoved(itemsBeforeThisAdapter, previousItemsCount);
    } else {
      //this condition should practically never happen
      fastAdapter.notifyAdapterDataSetChanged();
    }
    return false;
  }
};

  @Override
  public void onChanged(int position, int count, Object payload) {
    adapter.getFastAdapter().notifyAdapterItemRangeChanged(adapter.getFastAdapter().getPreItemCountByOrder(adapter.getOrder()) + position, count, payload);
  }
}