Fetching Movies Title , Description , and Posters From API Using Volley Library in Android Studio

MainActivity.java

package com.codingstuff.movielist;
import androidx.appcompat.app.AppCompatActivity;
import androidx.recyclerview.widget.LinearLayoutManager;
import androidx.recyclerview.widget.RecyclerView;
import android.os.Bundle;
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 movieList;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

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

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

        movieList = new ArrayList<>();
        fetchMovies();


    }

    private void fetchMovies() {

        String url = "https://www.json-generator.com/api/json/get/cfsXpFGwwO?indent=2";

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

                for (int i = 0 ; i < response.length() ; i ++){
                    try {
                        JSONObject jsonObject = response.getJSONObject(i);
                        String title = jsonObject.getString("title");
                        String overview = jsonObject.getString("overview");
                        String poster = jsonObject.getString("poster");
                        Double rating = jsonObject.getDouble("rating");

                        Movie movie = new Movie(title , poster , overview , rating);
                        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);
    }
}

Movie.java

package com.codingstuff.movielist;

public class Movie {

    private String title , poster , overview;
    private Double rating;

    public Movie(String title , String poster , String overview , Double rating){
        this.title = title;
        this.poster = poster;
        this.overview = overview;
        this.rating = rating;
    }

    public String getTitle() {
        return title;
    }

    public String getPoster() {
        return poster;
    }

    public String getOverview() {
        return overview;
    }

    public Double getRating() {
        return rating;
    }
}

VolleySingleton.java

package com.codingstuff.movielist;

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;}
}

MovieAdapter.java

package com.codingstuff.movielist;

import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
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 com.bumptech.glide.Glide;

import java.util.List;

public class MovieAdapter extends RecyclerView.Adapter {

    private Context context;
    private List movieList;

    public MovieAdapter(Context context , List movies){
        this.context = context;
        movieList = movies;
    }
    @NonNull
    @Override
    public MovieHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
        View view = LayoutInflater.from(context).inflate(R.layout.item , parent , false);
        return new MovieHolder(view);
    }

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

        Movie movie = movieList.get(position);
        holder.rating.setText(movie.getRating().toString());
        holder.title.setText(movie.getTitle());
        holder.overview.setText(movie.getOverview());
        Glide.with(context).load(movie.getPoster()).into(holder.imageView);

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

                Bundle bundle = new Bundle();
                bundle.putString("title" , movie.getTitle());
                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 movieList.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);
        }
    }
}

DetailActivity.java

package com.codingstuff.movielist;

import androidx.appcompat.app.AppCompatActivity;

import android.os.Bundle;
import android.widget.ImageView;
import android.widget.TextView;

import com.bumptech.glide.Glide;

public class DetailActivity extends AppCompatActivity {

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


        ImageView imageView = findViewById(R.id.poster_image);
        TextView rating_tv = findViewById(R.id.mRating);
        TextView title_tv = findViewById(R.id.mTitle);
        TextView overview_tv = findViewById(R.id.movervie_tv);

        Bundle bundle = getIntent().getExtras();

        String mTitle = bundle.getString("title");
        String mPoster = bundle.getString("poster");
        String mOverView = bundle.getString("overview");
        double mRating = bundle.getDouble("rating");

        Glide.with(this).load(mPoster).into(imageView);
        rating_tv.setText(Double.toString(mRating));
        title_tv.setText(mTitle);
        overview_tv.setText(mOverView);

    }
}