android tutorial - Using several viewHolders with itemviewtype in android | Developer android - android app development - android studio - android app developement

Sometimes a RecyclerView will need to use several types of Views to be displayed in the list shown in the UI, and each View needs a different layout xml to be inflated. For this issue, you may use different ViewHolders in single Adapter, by using a special method in RecyclerView - getItemViewType(int position). Below is example of using two ViewHolders: A ViewHolder for displaying list entries A ViewHolder for displaying multiple header views

@Override
public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
    View itemView = LayoutInflater.from(context).inflate(viewType, parent, false);
    return ViewHolder.create(itemView, viewType);
}

@Override
public void onBindViewHolder(RecyclerView.ViewHolder holder, int position) {
    final Item model = this.items.get(position);
    ((ViewHolder) holder).bind(model);
}

@Override
public int getItemViewType(int position) {
    return inSearchState ? R.layout.item_header : R.layout.item_entry;
}

abstract class ViewHolder {
    abstract void bind(Item model);

    public static ViewHolder create(View v, int viewType) {
        return viewType == R.layout.item_header ? new HeaderViewHolder(v) :new EntryViewHolder(v);
    }
}  

static class EntryViewHolder extends ViewHolder {
    private View v;

    public EntryViewHolder(View v) {
        this.v = v;
    }

    @Override public void bind(Item model) {
        // Bind item data to entry view.
    }
}

static class HeaderViewHolder extends ViewHolder {
    private View v;

    public HeaderViewHolder(View v) {
        this.v = v;
    }

    @Override public void bind(Item model) {
        // Bind item data to header view.