Super shorthand for RecyclerView adapter

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RecycleView is a new control. It standardizes the writing of Viewholder.

But I always feel that the writing of the adapter is too lengthy. What should I do?

Let's simplify it.

The implementation of ViewHolder is the same as ViewHolder in the super-saving writing of ListView adapter

ViewHolder.class

 public   class ViewHolder {
 private SparseArray<View> viewHolder;
 private View view; 
 
 public   static ViewHolder getViewHolder(View view){
        ViewHolder viewHolder = (ViewHolder) view.getTag();
 if (viewHolder == null ) {
            viewHolder = new ViewHolder(view);
            view.setTag(viewHolder);
 }
 return viewHolder;
 }
 private ViewHolder(View view) {
 this .view = view;
        viewHolder = new SparseArray<View>();
        view.setTag(viewHolder);
 }
 public <T extends View> T get( int id) {
        View childView = viewHolder.get(id);
 if (childView == null ) {
            childView = view.findViewById(id);
            viewHolder.put(id, childView);
 }
 return (T) childView;
 } 
 
 public View getConvertView() {
 return view;
 } 
 
 public TextView getTextView( int id) { 
 
 return get(id);
 }
 public Button getButton( int id) { 
 
 return get(id);
 } 
 
 public ImageView getImageView( int id) {
 return get(id);
 } 
 
 public   void setTextView( int id,CharSequence charSequence){
        getTextView(id).setText(charSequence);
 } 
 
 }

We inherit RecyclerView.Adapter<RVHolder>

AutoRVAdapter.class

 public   abstract   class AutoRVAdapter extends RecyclerView.Adapter<RVHolder> { 
 
 
 public List<?> list; 
 
 private Context context; 
 
 public AutoRVAdapter(Context context, List<?> list) {
 this .list = list;
 this .context = context;
 } 
 
 @Override  
 public RVHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        View view = LayoutInflater.from(context).inflate(onCreateViewLayoutID(viewType), null ); 
 
 return   new RVHolder(view);
 } 
 
 public   abstract   int onCreateViewLayoutID( int viewType); 
 
 
 @Override  
 public   void onViewRecycled( final RVHolder holder) {
 super .onViewRecycled(holder);
 } 
 
 @Override  
 public   void onBindViewHolder( final RVHolder holder, final   int position) { 
 
        onBindViewHolder(holder.getViewHolder(), position);
 if (onItemClickListener != null ) {
            holder.itemView.setOnClickListener( new View.OnClickListener() {
 @Override  
 public   void onClick(View v) {
                    onItemClickListener.onItemClick( null , v, holder.getPosition(), holder.getItemId());
 }
 });
 } 
 
 } 
 
 public   abstract   void onBindViewHolder(ViewHolder holder, int position); 
 
 @Override  
 public   int getItemCount() {
 return list.size();
 } 
 
 private AdapterView.OnItemClickListener onItemClickListener; 
 
 public AdapterView.OnItemClickListener getOnItemClickListener() {
 return onItemClickListener;
 } 
 
 public   void setOnItemClickListener(AdapterView.OnItemClickListener onItemClickListener) {
 this .onItemClickListener = onItemClickListener;
 }
 }

RVHolder.class inherits RecyclerView.ViewHolder

 public   class RVHolder extends RecyclerView.ViewHolder { 
 
 
 private ViewHolder viewHolder; 
 
 public RVHolder(View itemView) {
 super (itemView);
        viewHolder=ViewHolder.getViewHolder(itemView);
 } 
 
 
 public ViewHolder getViewHolder() {
 return viewHolder;
 } 
 
 }

That's it, it's over

Our newly written adapter inherits AutoRVAdapter and implements onCreateViewLayoutID and onBindViewHolder methods.

onCreateViewLayoutID->Returns the layout of the item.

onBindViewHolder->Bind data source.

 public   class DemoRVAdapter extends AutoRVAdapter {
 public RecyclerAdapter(Context context, List<?> list) {
 super (context, list);
 } 
 
 @Override  
 public   int onCreateViewLayoutID( int viewType) {
 return R.layout.item;
 } 
 
 @Override  
 public   void onBindViewHolder(ViewHolder holder, int position) { 
 
        Entity item=(Entity) list.get(position);
        vh.getTextView(R.id.name).setText(item.getName());
        vh.getTextView(R.id.age).setText(item.getAge());
        vh.setText(R.id.height,item.getHeight());
 }
 }