CODEWITHSUNDEEP
androidandroid-recyclerview
sylsau
sylsau

Reputation: 423

How can I implement a RecyclerView with a different number of items by rows?

I know that I can implement a RecyclerView with different views for items on Android.

But my need is a little bit different here. I would like to know how can I implement a RecyclerView with a different number of items by rows.

For example, I would have 2 items for first row, then just 1 item for second row, then 3 items for third row, ...

Is it possible to implement this with a RecyclerView? If so, How can I implement it?

Thanks for your help.

Sylvain

Upvotes: 2

Views: 1310

Answers (2)

Anand Pandey
Anand Pandey

Reputation: 562

Yes it is possible, you just need to create different Views and get them in the if (holder instanceof ProfileAdapter.VideoViewHolder) { } else { } and throw the views inside the above method using public int getItemViewType(int position) { }

Upvotes: 0

Sdghasemi
Sdghasemi

Reputation: 5598

What you're looking for can be done with GridLayoutManager itself, the only trick here is to use the least common multiple (lcm) of your column counts per row as your total span count. Here is an easy example:

@Override
public void onCreate() {
    super.onCreate();

    ...

    int spanCount = lcm(2, 1, 3, 8);
    GridLayoutManager layoutManager = new GridLayoutManager(this, spanCount);
    layoutManager.setSpanSizeLookup(new GridLayoutManager.SpanSizeLookup() {
        @Override
        public int getSpanSize(int position) {
            int numberOfColumns;
            switch (position) {
                case 0:
                    numberOfColumns = 2;
                    break;
                case 1:
                    numberOfColumns = 1;
                    break;
                case 2:
                    numberOfColumns = 3;
                    break;
                case 3:
                    numberOfColumns = 8;
                    break;
                default:
                    numberOfColumns = spanCount;
            }
            return spanCount / numberOfColumns;
        }
    });
    recyclerView.setLayoutManager(layoutManager);

    ...
}

public static int lcm(int... input) {
    int result = input[0];
    for(int i = 1; i < input.length; i++) result = lcm(result, input[i]);
    return result;
}

Upvotes: 4

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