Covid 19 Get All Country Data using Volley library

 

Covid 19 Get All Country Data using Volley library

Output Screen

add dependency in gradle

implementation 'com.android.volley:volley:1.1.0'
implementation 'com.google.code.gson:gson:2.8.5'
implementation 'androidx.recyclerview:recyclerview:1.1.0'
implementation 'androidx.cardview:cardview:1.0.0'

MainActivity.java

package com.example.livejsonparsing;

import androidx.appcompat.app.AlertDialog;
import androidx.appcompat.app.AppCompatActivity;
import androidx.recyclerview.widget.GridLayoutManager;
import androidx.recyclerview.widget.RecyclerView;

import android.content.DialogInterface;
import android.os.AsyncTask;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.ProgressBar;
import android.widget.TextView;
import android.widget.Toast;

import com.android.volley.Request;
import com.android.volley.Response;
import com.android.volley.VolleyError;
import com.android.volley.toolbox.StringRequest;
import com.android.volley.toolbox.Volley;
import com.google.gson.Gson;

import org.json.JSONArray;

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

public class MainActivity extends AppCompatActivity {
    ProgressBar progressBar;
    RecyclerView recyclerView;
    CustomCaseAdapter customCaseAdapter;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        progressBar = findViewById(R.id.progress);
        recyclerView = findViewById(R.id.myrecyclerview);
        recyclerView.setLayoutManager(new GridLayoutManager(this, 2));
        customCaseAdapter = new CustomCaseAdapter(caseList);

        customCaseAdapter.setCaseListener(new CustomCaseAdapter.CaseListener() {
            @Override
            public void caseItem(View view, int position) {
                Case ca = caseList.get(position);
                AlertDialog.Builder a = new AlertDialog.Builder(MainActivity.this);
                a.setTitle(ca.getCountry());
                a.setMessage("Total Death " + ca.getDeaths());
                a.setPositiveButton("Ok", new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialogInterface, int i) {
                        dialogInterface.dismiss();
                    }
                });
                a.show();
            }
        });

        recyclerView.setAdapter(customCaseAdapter);
    }

    private List<Case> caseList = new ArrayList<>();

    public void getData(View view) {
        progressBar.setVisibility(View.VISIBLE);
        StringRequest sr = new StringRequest(Request.Method.GET,
                "https://coronavirus-19-api.herokuapp.com/countries",
                new Response.Listener<String>() {
                    @Override
                    public void onResponse(String response) {
                        progressBar.setVisibility(View.GONE);

                        try {
                            JSONArray jsonArray = new JSONArray(response);
                            Gson gson = new Gson();
                            for (int i = 0; i < jsonArray.length(); i++) {
                                Case cs = gson.fromJson(jsonArray.
                                        getJSONObject(i).
                                        toString(), Case.class);
                                caseList.add(cs);
                            }
                        } catch (Exception e) {
                            Log.e("error", e.toString());
                        }
                        customCaseAdapter.notifyDataSetChanged();

                    }
                }, new Response.ErrorListener() {
            @Override
            public void onErrorResponse(VolleyError error) {
                progressBar.setVisibility(View.GONE);
                Log.e("error", error.toString());
                Toast.makeText(MainActivity.this, error.toString(),
                        Toast.LENGTH_SHORT).show();
            }
        });
        Volley.newRequestQueue(MainActivity.this).add(sr);
    }


}

Case.java
package com.example.livejsonparsing;

public class Case {
    private String country;
    private int cases;
    private int todayCases;
    private int deaths;
    private int todayDeaths;
    private int recovered;
    private int active;
    private int critical;

    public String getCountry() {
        return country;
    }

    public void setCountry(String country) {
        this.country = country;
    }

    public int getCases() {
        return cases;
    }

    public void setCases(int cases) {
        this.cases = cases;
    }

    public int getTodayCases() {
        return todayCases;
    }

    public void setTodayCases(int todayCases) {
        this.todayCases = todayCases;
    }

    public int getDeaths() {
        return deaths;
    }

    public void setDeaths(int deaths) {
        this.deaths = deaths;
    }

    public int getTodayDeaths() {
        return todayDeaths;
    }

    public void setTodayDeaths(int todayDeaths) {
        this.todayDeaths = todayDeaths;
    }

    public int getRecovered() {
        return recovered;
    }

    public void setRecovered(int recovered) {
        this.recovered = recovered;
    }

    public int getActive() {
        return active;
    }

    public void setActive(int active) {
        this.active = active;
    }

    public int getCritical() {
        return critical;
    }

    public void setCritical(int critical) {
        this.critical = critical;
    }
}

CustomCaseAdapter.java
package com.example.livejsonparsing;

import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;

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

import java.util.List;

public class CustomCaseAdapter extends RecyclerView.Adapter
        <CustomCaseAdapter.MyViewHolder> {
    private List<Case> caseList;
    private CaseListener caseListener;

    public CustomCaseAdapter(List<Case> caseList) {
        this.caseList = caseList;
    }

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

    @Override
    public void onBindViewHolder(@NonNull MyViewHolder holder, int position) {
        Case ca = caseList.get(position);
        holder.tcountry.setText(ca.getCountry());
        holder.tcase.setText(String.valueOf(ca.getCases()));
        Log.e("error", caseList.size() + "");
    }

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

    class MyViewHolder extends RecyclerView.ViewHolder implements 
            View.OnClickListener {
        TextView tcountry, tcase;

        public MyViewHolder(@NonNull View itemView) {
            super(itemView);
            tcountry = itemView.findViewById(R.id.countryname);
            tcase = itemView.findViewById(R.id.countrycase);
            itemView.setOnClickListener(this);
        }

        @Override
        public void onClick(View view) {
            caseListener.caseItem(view, getAdapterPosition());
        }
    }

    public void setCaseListener(CaseListener caseListener) {
        this.caseListener = caseListener;
    }

    public interface CaseListener {
        void caseItem(View view, int position);
    }

}

AndroidManifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.livejsonparsing">

    <uses-permission-sdk-23 android:name="android.permission.INTERNET" />
    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:roundIcon="@mipmap/ic_launcher_round"
        android:supportsRtl="true"
        android:theme="@style/AppTheme">
        <activity android:name=".MainActivity">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>

</manifest>