RecyclerView Demo

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context="com.rv.RecyclerViewActivity">

    <android.support.v7.widget.RecyclerView
        android:id="@+id/rvList"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_marginBottom="8dp"
        android:layout_marginLeft="8dp"
        android:layout_marginRight="8dp"
        android:layout_marginTop="8dp"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

</android.support.constraint.ConstraintLayout>

list_item_student.xml

<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="wrap_content">

    <ImageView
        android:id="@+id/imgStudent"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginLeft="16dp"
        android:layout_marginTop="16dp"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        tools:src="@mipmap/ic_launcher"
        app:layout_constraintBottom_toBottomOf="parent"
        android:layout_marginBottom="16dp" />

    <TextView
        android:id="@+id/txtName"
        android:layout_width="wrap_content"
        android:layout_height="0dp"
        android:layout_marginBottom="0dp"
        android:layout_marginLeft="20dp"
        android:layout_marginTop="16dp"
        android:gravity="center_vertical"
        app:layout_constraintBottom_toBottomOf="@+id/imgStudent"
        app:layout_constraintLeft_toRightOf="@+id/imgStudent"
        app:layout_constraintTop_toTopOf="parent"
        tools:text="Student 1" />

</android.support.constraint.ConstraintLayout>

RecyclerViewActivity.java

package com.rv;

import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.view.View;
import android.widget.Toast;

import java.util.ArrayList;

public class RecyclerViewActivity extends AppCompatActivity {

    private RecyclerView rvList;
    private StudentListAdapter _adapter;
    private ArrayList<Student> arrStudents = new ArrayList<>();

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        initUI();
        setUpList();
    }

    private void initUI() {
        rvList = (RecyclerView) findViewById(R.id.rvList);
        LinearLayoutManager lm = new LinearLayoutManager(this);
        lm.setOrientation(LinearLayoutManager.VERTICAL);
        rvList.setLayoutManager(lm);
        _adapter = new StudentListAdapter(this, arrStudents);
        _adapter.setRecyclerViewListener(new StudentListAdapter.RecyclerViewListener() {
            @Override
            public void onClick(View v, int position) {
                Toast.makeText(RecyclerViewActivity.this, "position : " + position, Toast.LENGTH_SHORT).show();
            }
        });
        rvList.setAdapter(_adapter);
    }

    private void setUpList() {
        arrStudents.clear();
        for (int i = 0; i < 11; i++) {
            Student student = new Student();
            student.name = "Student " + i;
            student.imgResource = i % 2 == 0 ? R.mipmap.ic_launcher : R.mipmap.ic_launcher_round;
            arrStudents.add(student);
        }
        _adapter.notifyDataSetChanged();
    }
}

Student.java

package com.rv;

/**
 * Created by Jaydip Zala
 */

public class Student {
    public String name = "";
    public int imgResource = R.mipmap.ic_launcher;
}

StudentListAdapter.java

package com.rv;

import android.content.Context;
import android.support.v7.widget.RecyclerView;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
import android.widget.TextView;

import java.util.ArrayList;

/**
 * Created by Jaydip Zala
 */

public class StudentListAdapter extends RecyclerView.Adapter<StudentListAdapter.ItemViewHolder> {

    private ArrayList<Student> _items;
    private Context context;
    private RecyclerViewListener recyclerViewListener;

    public StudentListAdapter(Context c, ArrayList<Student> _items) {
        context = c;
        this._items = _items;
    }

    public void setRecyclerViewListener(RecyclerViewListener recyclerViewListener) {
        this.recyclerViewListener = recyclerViewListener;
    }

    @Override
    public ItemViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        View itemView = LayoutInflater.from(parent.getContext()).inflate(R.layout.list_item_student, parent, false);
        return new ItemViewHolder(itemView);
    }

    @Override
    public void onBindViewHolder(final ItemViewHolder _holder, int position) {
        Student student = _items.get(position);
        Log.e("position", "position : " + position);
        _holder.txtName.setText(student.name);
        _holder.imgStudent.setImageResource(student.imgResource);
    }

    @Override
    public long getItemId(int position) {
        return position;
    }

    @Override
    public int getItemCount() {
        Log.e("position", "size : " + _items.size());
        return _items.size();
    }

    class ItemViewHolder extends RecyclerView.ViewHolder
            implements View.OnClickListener {
        TextView txtName;
        ImageView imgStudent;

        ItemViewHolder(View itemView) {
            super(itemView);
            itemView.setOnClickListener(this);
            txtName = (TextView) itemView.findViewById(R.id.txtName);
            imgStudent = (ImageView) itemView.findViewById(R.id.imgStudent);
        }

        @Override
        public void onClick(View v) {
            if (recyclerViewListener != null)
                recyclerViewListener.onClick(v, this.getAdapterPosition());
        }
    }

    public interface RecyclerViewListener {
        void onClick(View v, int position);
    }
}