How can I add sections?

[vipulasri]

How can I add sections?

[vidia]

I made a sectioned version of this locally that seems to work pretty well. The main codebased is closed source, but here is the relevant adapter. Hopefully it can help @vipulasri implement an update as well.

Some context before you look, my goal for this was to display a calendar where the headings are days of the week (represented by DayHeaderScheduleEntry) and Events are displayed using the timeline (represented by ScheduleEntry) Both of these entries are a subclass of the abstract class ScheduleViewHolder which is a ViewHolder.

The only abstract method on ScheduleEntry is setScheduleEntry() which takes a ScheduleEntry and uses it to populate the view on that holder.

Finally, note that keySet() does not retain any ordering. So this is not complete. But its a start and I thought I'd share it anyway.

/**
 * Created by David Tschida (@vidia) on 3/23/16.
 */
public class ScheduleRecyclerAdapter extends RecyclerView.Adapter<ScheduleViewHolder> {
    private static int HEADERVIEWTYPE = 124124; //arbitrary number, not 1-4.

    private Map<DayHeaderScheduleEntry, List<ScheduleEntry>> mWeekSchedule;

    List<ScheduleEntry> mAllEntries;

    public ScheduleRecyclerAdapter(Map<DayHeaderScheduleEntry, List<ScheduleEntry>> weekSchedule) {
        this.mWeekSchedule = weekSchedule;

        //flatten the map.
        mAllEntries = new ArrayList<>();
        for(DayHeaderScheduleEntry hme : mWeekSchedule.keySet()) {
            mAllEntries.add(hme);
            for(ScheduleEntry se : mWeekSchedule.get(hme)) {
                mAllEntries.add(se);
            }
        }
    }

    @Override
    public int getItemViewType(int position) {

        if(mAllEntries.get(position) instanceof DayHeaderScheduleEntry) {
            return HEADERVIEWTYPE;
        } else {
            //get position in sublist...
            int prevHeader = -1;
            for (int i = position; i >= 0; i--) {
                if(mAllEntries.get(i) instanceof DayHeaderScheduleEntry) {
                    prevHeader = i;
                    break;
                }
            }

            int postHeader = -1;
            for (int i = position; i < mAllEntries.size(); i++) {
                if(mAllEntries.get(i) instanceof DayHeaderScheduleEntry) {
                    postHeader = i;
                    break;
                }
            }
            if(postHeader == -1) {
                //we are at the end of the list
                postHeader = mAllEntries.size();
            }

            //Pass the position in the "sublist" to the library to init properly.
            //Library has an error in this implementation. See PR https://github.com/vipulasri/Timeline-View/pull/7
            //on upstream.
            return VidiaTimelineView.getTimeLineViewType(position - prevHeader - 1, postHeader - prevHeader - 1);
        }

    }

    @Override
    public ScheduleViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        if(viewType == HEADERVIEWTYPE) {
            View view = View.inflate(parent.getContext(), R.layout.schedule_day_heading, null);
            return new DayHeadingViewHolder(view);
        } else {
            View view = View.inflate(parent.getContext(), R.layout.item_timeline, null);
            return new TimeLineViewHolder(view, viewType);
        }
    }

    @Override
    public void onBindViewHolder(ScheduleViewHolder holder, int position) {
        holder.setScheduleEntry(mAllEntries.get(position));
    }

    @Override
    public int getItemCount() {
        return mAllEntries.size();
    }
}

[vipulasri]

@RiinaV Nice input. I will try to implement it in next update. Till now you can implement it like Sectioned Recycler View. Checkout code of this library you will be able to implement it. https://github.com/afollestad/sectioned-recyclerview

[rinav]

@vipulasri Thanks for the tip.
I'll look into the lib and implement

[vipulasri]

After actually understanding this issue, it's totally out of scope for this library. If you still think this applies please open a new bug and provide supporting documents for that.