Json Api volley library

 1.VolleySingleton 

package abhiandroid.com.uitest;

import android.content.Context;

import com.android.volley.RequestQueue;
import com.android.volley.toolbox.Volley;

public class VolleySingleton {

    private RequestQueue requestQueue;
    private static VolleySingleton mInstance;

    private VolleySingleton(Context context){
        requestQueue = Volley.newRequestQueue(context.getApplicationContext());
    }

    public static synchronized VolleySingleton getmInstance(Context context){

        if (mInstance == null){
            mInstance = new VolleySingleton(context);
        }
        return mInstance;
    }

    public RequestQueue getRequestQueue(){return requestQueue;}
}

2.

package abhiandroid.com.uitest;

import androidx.appcompat.app.AppCompatActivity;
import androidx.fragment.app.Fragment;
import androidx.fragment.app.FragmentTransaction;
import androidx.recyclerview.widget.GridLayoutManager;
import androidx.recyclerview.widget.RecyclerView;

import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.Toast;

import com.android.volley.Request;
import com.android.volley.RequestQueue;
import com.android.volley.Response;
import com.android.volley.VolleyError;
import com.android.volley.toolbox.JsonArrayRequest;

import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;

import java.util.ArrayList;
import java.util.List;

public class MainActivity extends AppCompatActivity {

    private RecyclerView recyclerView;
    private RequestQueue requestQueue;
    private List<Movie> movieList;
    Button button;

    String strJson="{ \"Employee\" :[{\"id\":\"101\",\"name\":\"Sonoo Jaiswal\",\"salary\":\"50000\"},{\"id\":\"102\",\"name\":\"Vimal Jaiswal\",\"salary\":\"60000\"}] }";
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        button = findViewById(R.id.button);

        //D

        button.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
              //  Fragment fragment = new BlankFragment();

              //  FragmentTransaction fragmentTransaction = getSupportFragmentManager().beginTransaction();

             //   fragmentTransaction.replace(R.id.ff,fragment).commit();

                getSupportFragmentManager().beginTransaction().add(R.id.ff,new BlankFragment()).commit();

            }
        });


        recyclerView = findViewById(R.id.recyclerview);
        recyclerView.setHasFixedSize(true);
        // recyclerView.setLayoutManager(new LinearLayoutManager(this));

        requestQueue = VolleySingleton.getmInstance(this).getRequestQueue();

        movieList = new ArrayList<>();
        fetchMovies();
        //grid view
        GridLayoutManager GLM = new GridLayoutManager(this,2);
        recyclerView.setLayoutManager(GLM);

  Log.d("json","Max"+strJson);

    }

    private void fetchMovies() {

        String url = "https://run.mocky.io/v3/2b74ab88-9332-4302-8153-643405a49230";

        JsonArrayRequest jsonArrayRequest = new JsonArrayRequest(Request.Method.GET, url, null,
                new Response.Listener<JSONArray>() {
                    @Override
                    public void onResponse(JSONArray response) {

                        for (int i = 0; i < response.length(); i++) {
                            try {
                                JSONObject jsonObject = response.getJSONObject(i);
                                String name = jsonObject.getString("name");
                                String image = jsonObject.getString("image");
                                String contact = jsonObject.getString("contact");

                                //      Toast.makeText(MainActivity.this,"hi"+name,Toast.LENGTH_LONG).show();
                                Log.d("sys", "jus" + contact);

                                // Log.d("Tag","app"+ contact.toString());

                                Movie movie = new Movie(contact, image);
                                movieList.add(movie);
                            } catch (JSONException e) {
                                e.printStackTrace();
                            }

                            MovieAdapter adapter = new MovieAdapter(MainActivity.this, movieList);

                            recyclerView.setAdapter(adapter);
                        }
                    }
                }, new Response.ErrorListener() {
            @Override
            public void onErrorResponse(VolleyError error) {
                Toast.makeText(MainActivity.this, error.getMessage(), Toast.LENGTH_SHORT).show();
            }
        });

        requestQueue.add(jsonArrayRequest);
    }
}

3.

package abhiandroid.com.uitest;

public class Movie {

    private String name,image ;


    public Movie(String name, String image){
        this.name = name;
        this.image = image;
       // this.poster = poster;
       // this.overview = overview;
        //this.rating = rating;
    }

    public String getName() {
        return name;
    }

    public String getImage() { return image;}

    //public String getOverview() {




}

4.

package abhiandroid.com.uitest;

import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
import android.widget.TextView;

import androidx.annotation.NonNull;
import androidx.constraintlayout.widget.ConstraintLayout;
import androidx.recyclerview.widget.RecyclerView;

import java.util.List;

public class FragmDAdapter extends RecyclerView.Adapter<FragmDAdapter.MovieHolder> {

    private Context context;
    private List<FModel> FDList;


    public FragmDAdapter(Context context , List<FModel> FDas){
        this.context = context;
        FDList = FDas;
    }
    @NonNull
    @Override
    public MovieHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
        View view = LayoutInflater.from(context).inflate(R.layout.drow1 , parent , false);
        return new MovieHolder(view);
    }

    @Override
    public void onBindViewHolder(@NonNull MovieHolder holder, int position) {

        FModel movie = FDList.get(position);
        // holder.rating.setText(movie.getRating().toString());
        holder.title.setText(movie.getName());
        // holder.overview.setText(movie.getOverview());
       // Glide.with(context).load( "https://www.fastdeliveryind.com/admin/uploads/products/"+movie.getImage()).into(holder.imageView);

       /* holder.title.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Intent intent = new Intent(context , DetailActivity.class);

                Bundle bundle = new Bundle();
                bundle.putString("name" , movie.getName());
                // bundle.putString("overview" , movie.getOverview());
                // bundle.putString("poster" , movie.getPoster());
                //  bundle.putDouble("rating" , movie.getRating());

                intent.putExtras(bundle);


                context.startActivity(intent);
            }
        }); */





    }

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

    public class MovieHolder extends RecyclerView.ViewHolder{

     //   ImageView imageView;
        TextView title , overview , rating;
      //  ConstraintLayout constraintLayout;

        public MovieHolder(@NonNull View itemView) {
            super(itemView);

            //imageView = itemView.findViewById(R.id.imageview);
            title = itemView.findViewById(R.id.title_tv);
           // overview = itemView.findViewById(R.id.overview_tv);
            //rating = itemView.findViewById(R.id.rating);
            //constraintLayout = itemView.findViewById(R.id.main_layout);
        }
    }
}

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