Android RecyclerView Example with Retrofit library.

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:orientation="vertical"
    android:padding="16dp">

    <TextView
        android:id="@+id/text_name"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="Name"
        android:textStyle="bold" />

    <TextView
        android:id="@+id/text_address"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="Address" />

</LinearLayout>

ApiClient.java

package suresh.androidtest;

import retrofit2.Retrofit;
import retrofit2.converter.gson.GsonConverterFactory;

/**
 * Created by Dumadu on 26-Oct-17.
 */

public class ApiClient {
    private static final String BASE_URL = "https://next.json-generator.com/api/json/get/";
    public static Retrofit retrofit = null;

    public static Retrofit getApiClient() {
        if (retrofit == null) {
            retrofit = new Retrofit.Builder().baseUrl(BASE_URL)
                    .addConverterFactory(GsonConverterFactory.create()).build();
        }
        return retrofit;
    }
}

ApiInterface.java

package suresh.androidtest;

import java.util.List;

import retrofit2.Call;
import retrofit2.http.POST;

/**
 * Created by Dumadu on 26-Oct-17.
 */

public interface ApiInterface {

    @POST("E1Pn7khWG")
    Call<List<Hospitals>> getHospitalsList();
}

Hospitals.java

package suresh.androidtest;

import com.google.gson.annotations.SerializedName;

/**
 * Created by Dumadu on 26-Oct-17.
 */

public class Hospitals {
    public String id;
    @SerializedName("hospital_name")
    public String hospitalName;
    public String address;
}

item_layout.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <android.support.v7.widget.RecyclerView
        android:id="@+id/recyler_hospitals"
        android:layout_width="match_parent"
        android:layout_height="match_parent" />
</RelativeLayout>

MainActivity.java

package suresh.androidtest;

import android.content.DialogInterface;
import android.os.Bundle;
import android.support.v7.app.AlertDialog;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.DividerItemDecoration;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;

import java.util.List;

import retrofit2.Call;
import retrofit2.Callback;
import retrofit2.Response;

public class MainActivity extends AppCompatActivity implements RecyclerViewAdapter.hospitalClickListener {
    ApiInterface apiInterface;
    RecyclerView mRecyclerView;
    List<Hospitals> hospitalses;

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

        mRecyclerView = (RecyclerView) findViewById(R.id.recyler_hospitals);
        mRecyclerView.setLayoutManager(new LinearLayoutManager(this));
        mRecyclerView.addItemDecoration(new DividerItemDecoration(this, DividerItemDecoration.VERTICAL));

        apiInterface = ApiClient.getApiClient().create(ApiInterface.class);
        apiInterface.getHospitalsList().enqueue(new Callback<List<Hospitals>>() {
            @Override
            public void onResponse(Call<List<Hospitals>> call, Response<List<Hospitals>> response) {
                hospitalses = response.body();
                mRecyclerView.setAdapter(new RecyclerViewAdapter(hospitalses, MainActivity.this));
            }

            @Override
            public void onFailure(Call<List<Hospitals>> call, Throwable t) {

            }
        });

    }

    @Override
    public void getItem(int position) {
        AlertDialog.Builder dialog = new AlertDialog.Builder(this)
                .setTitle(hospitalses.get(position).hospitalName)
                .setMessage(hospitalses.get(position).address)
                .setCancelable(false)
                .setPositiveButton("Ok", new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialog, int which) {
                        dialog.cancel();
                    }
                });
        dialog.show();
    }
}

RecyclerViewAdapter.java

package suresh.androidtest;

import android.support.v7.widget.RecyclerView;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;

import java.util.List;

/**
 * Created by Dumadu on 26-Oct-17.
 */

public class RecyclerViewAdapter extends RecyclerView.Adapter<RecyclerViewAdapter.RecyclerViewHolder> {
    List<Hospitals> hospitalses;
    hospitalClickListener hospitalClickListener;

    public RecyclerViewAdapter(List<Hospitals> hospitalses, hospitalClickListener hospitalClickListener) {
        this.hospitalses = hospitalses;
        this.hospitalClickListener = hospitalClickListener;
    }

    interface hospitalClickListener {
        void getItem(int position);
    }

    @Override
    public RecyclerViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.item_layout, parent, false);
        return new RecyclerViewHolder(view, hospitalClickListener);
    }

    @Override
    public void onBindViewHolder(RecyclerViewHolder holder, int position) {
        holder.textViewName.setText(hospitalses.get(position).id + ". " + hospitalses.get(position).hospitalName);
        holder.textViewAddress.setText(hospitalses.get(position).address);
    }

    @Override
    public int getItemCount() {
        return hospitalses.size();
    }

    class RecyclerViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener {
        TextView textViewName, textViewAddress;
        hospitalClickListener hospitalClickListener;

        public RecyclerViewHolder(View itemView, hospitalClickListener hospitalClickListener) {
            super(itemView);
            textViewName = itemView.findViewById(R.id.text_name);
            textViewAddress = itemView.findViewById(R.id.text_address);
            this.hospitalClickListener = hospitalClickListener;
            itemView.setOnClickListener(this);
        }

        @Override
        public void onClick(View v) {
            hospitalClickListener.getItem(getAdapterPosition());
        }
    }
}