Using the same RecyclerView.Adapter with a different ViewHolder

Question

I would use the same RecyclerView.Adapter with two or more different fragments. Every fragment uses a different view items layout so I must use a different RecyclerView.ViewHolder for binding the data.

For the implementation I have created one RecycleView.ViewHolder that binds the two different view layout with a switch but I think might be something better for this kind of situation.

public class TFViewHolder extends RecyclerView.ViewHolder {
 public final static int LAYOUT_ONE = 1;
 public final static int LAYOUT_TWO = 2;
 public Integer mId;
 public ImageView mThumb;
 public TextView mName;
 public TextView mTitle;
 public TextView mDescription;
 public final View mView;
 public TFViewHolder(View itemView, int layoutType) {
 super(itemView);
 mView = itemView;
 switch (layoutType) {
 case LAYOUT_ONE:
 mThumb = (ImageView) itemView.findViewById(R.id.thumb);
 mName = (TextView) itemView.findViewById(R.id.name);
 break;
 case LAYOUT_TWO:
 mTitle = (TextView) itemView.findViewById(R.id.title);
 mDescription = (TextView) itemView.findViewById(R.id.description);
 break;
 }
 itemView.setTag(itemView);
 }
}

The RecyclerView.Adapter:

public class TFRecyclerViewAdapter extends RecyclerView.Adapter<TFViewHolder> {
 protected Context context;
 protected List items;
 private int layout;
 private int layoutType;
 public TFRecyclerViewAdapter(Context context) {
 this.context = context;
 }
 public TFRecyclerViewAdapter(Context context, int layout, int layoutType) {
 this(context);
 this.layout = layout;
 this.layoutType = layoutType;
 }
 public void setItems(List items){
 this.items = items;
 }
 @Override
 public void onBindViewHolder(final TFViewHolder holder, final int position) {
 holder.mId = position;
 }
 @Override
 public TFViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
 LayoutInflater inflater = LayoutInflater.from(parent.getContext());
 View itemView = inflater.inflate(layout, parent, false);
 return new TFViewHolder(itemView, layoutType);
 }
 @Override
 public int getItemCount() {
 int l = 0;
 if (items != null) {
 l = items.size();
 }
 return l;
 } 
}

Two different adapters that extend the TFRecyclerViewAdapter of above:

public class TFNewsRecyclerViewAdapter extends TFRecyclerViewAdapter {
 public TFNewsRecyclerViewAdapter(Context context, int layout) {
 super(context, layout, TFViewHolder.LAYOUT_NEWS);
 }
 @Override
 public void onBindViewHolder(TFViewHolder holder, int position) {
 final News item = (News) items.get(position);
 holder.mTitle.setText(item.getTitle());
 holder.mDescription.setText(item.getDescription());
 super.onBindViewHolder(holder, position);
 }
}

and

public class TFTeamsRecyclerViewAdapter extends TFRecyclerViewAdapter {
 public TFTeamsRecyclerViewAdapter(Context context, int layout) {
 super(context, layout, TFViewHolder.LAYOUT_TEAMS);
 }
 @Override
 public void onBindViewHolder(TFViewHolder holder, int position) {
 final Team team = (Team) items.get(position);
 Glide.with(holder.mThumb.getContext())
 .load(team.getThumb())
 .fitCenter()
 .crossFade()
 .into(holder.mThumb);
 holder.mName.setText(team.getName());
 super.onBindViewHolder(holder, position);
 }
}

• AdamMc331: Commenting because I haven't had time to look too closely, but instead of switching inside the ViewHolder you could create multiple ViewHolder objects and make use of getItemViewType() as described on this SO question: stackoverflow.com/questions/26245139/…
• Leena: what if I want to use same adapter for different fragments?