afollestad sectionedRecyclerView library. How to use seperate ViewHolders for each item

Question

I've been trying to implement this sectionedRecyclerView library in my app, but i need it to have cases where there are no section headers/footers (while still displaying items) and cases where there are. This library always needs at least 1 section/header.

Also, this library only has a single viewHodler. I want to be able to use different viewHolders, for items, headers and footers.

What methods would I need to override/change to accomplish this?

Answer 1

Firstly, you should have a type variable on your model.

public class MyModel{
    private int type;
    //setters and getters...
}

Then, create 2 ViewHolders on your adapter but the class that you which will use on Adapter<> will be the mother class(ViewHolder).

public class MyAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder> {

    class ViewModel1 extends RecyclerView.ViewHolder{
        //your code
    }

    class ViewModel2 extends RecyclerView.ViewHolder{
        //your code
    }
}

After that, you should implement some methods on your adapter.

public class MyAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder> {

    private List<MyModel> mModelList;

    public MyAdapter(List<MyModel> models){
        this.mModelList = models;
    }

    @Override public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        View view;
        LayoutInflater inflater = (LayoutInflater) parent.getContext().getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        switch (viewType) {
            case TYPE_1:
                view = inflater.inflate(R.layout.view_type_1, parent, false);
                return new ViewModel1(view);
            case TYPE_2:
                view = inflater.inflate(R.layout.view_type_2, parent, false);
                return new ViewModel2(view);
        }
        return null;
    }

    @Override public void onBindViewHolder(RecyclerView.ViewHolder holder, int position) {
        final MyModel item = mModelList.get(position);
        switch (item.type) {
            case TYPE_1:
                final ViewHolder1 vh1 = (ViewHolder1)holder;
                //your code
            break;
        case TYPE_2:
            final ViewHolder2 vh2 = (ViewHolder2)holder;
            //your code
            break;
       }
    }

    @Override public int getItemViewType(int position) {
        return mModelList.get(position).type;
    }

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