Is there any simple implementation or tutorial to implement RecyclerView in android?

Question

I am trying to port my existing project to material design but am unable to understand the implementation of RecyclerView. My old code uses a ListView but I want GMail app l

Answer 1

RecyclerView Adapter Example:

1. Adapter issue can be solved using below code:

   public class MyAdapter extends RecyclerView.Adapter         
   {
   
   private final Context mContext;
   private List mData1, mData2;
   
   public MyAdapter(Context mContext, String[] data1, String[] data2) {
   this.mContext = mContext;
   if (data1 != null)
       mData1 = new ArrayList(Arrays.asList(data1));
   else
       mData1 = new ArrayList();
   
   if (data2 != null)
       mData2 = new ArrayList(Arrays.asList(data2));
   else
       mData2 = new ArrayList();
   }
   
   public void add(String s, int position) {
   position = position == -1 ? getItemCount() : position;
   mData1.add(position, s);
   
   notifyItemInserted(position);
   }
   
   public void remove(int position) {
   if (position < getItemCount()) {
       mData1.remove(position);
       notifyItemRemoved(position);
   }
   }
   
   @Override
   public MyViewHolder onCreateViewHolder(ViewGroup viewGroup, int i) {
   LayoutInflater inflater = LayoutInflater.from(viewGroup.getContext());
   View itemView = inflater.inflate(R.layout.list_item, viewGroup, false);
   
   return new MyViewHolder(itemView);
   }
   
   @Override
   public void onBindViewHolder(MyViewHolder myViewHolder, final int position) {
       myViewHolder.tv1.setText(mData1.get(position));
   myViewHolder.tv2.setText(mData2.get(position));
   myViewHolder.itemView.setOnClickListener(new OnClickListener() {
   
       @Override
       public void onClick(View v) {
           // TODO Auto-generated method stub
           clickListener.onClick(v, position);
       }
   });
   }
   
   @Override
   public int getItemCount() {
   return mData1.size();
   }
   
   ClickListener clickListener;
   
   public void setClickListener(ClickListener clickListener) {
   this.clickListener = clickListener;
   }
   
   public interface ClickListener {
   public void onClick(View v, int pos);
   
   }
   
   public static class MyViewHolder extends RecyclerView.ViewHolder {
   protected TextView tv1;
   protected TextView tv2;
   
   public MyViewHolder(View itemView) {
       super(itemView);
       tv1 = (TextView) itemView.findViewById(R.id.txt1);
       tv2 = (TextView) itemView.findViewById(R.id.txt2);
   
   }
   
   }
   }
   

Usage is as below:

MyAdapter adapter=....;
adapter.setClickListener(new ClickListener() {

        @Override
        public void onClick(View v, int pos) {
            // do whatever you want
        }
    });

2. There is not any Simple way to do that. But i would suggest you one workaround for this. Add below view as a divider at the bottom inside your list_item.xml.

3. Item click listener is also resolved in point no. 1 above.

I hope this would help you.