Json Persing using Volley

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>

<RelativeLayout 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"    

android:id="@+id/activity_main"    

tools:context="com.example.abhinandan.demojsonparsing.MainActivity">

<ListView        

android:layout_width="match_parent"       

 android:layout_height="match_parent"        

android:id="@+id/lv">

</ListView>

</RelativeLayout>

row.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="match_parent"   

 android:orientation="vertical">


<TextView        

android:layout_width="wrap_content"       

android:layout_height="wrap_content"      

android:id="@+id/tvcountryname"      

android:textSize="25dp"/>


<TextView        

android:layout_width="wrap_content"        

android:layout_height="wrap_content"        

android:id="@+id/tvcapital"        

android:textSize="25dp"/>


</LinearLayout>

DemoSetGet.java






package com.example.abhinandan.demojsonparsing;


/** * Created by Abhinandan on 12/1/2017. */


public class DemoSetGet {

String countryname,capital,currencyname;


    public String getCountryname() {


        return countryname;


    }


    public void setCountryname(String countryname) {


        this.countryname = countryname;

}


    public String getCapital() {


        return capital;


    }


    public void setCapital(String capital) {


        this.capital = capital;

}


    public String getCurrencyname() {


        return currencyname;


    }


    public void setCurrencyname(String currencyname) {


        this.currencyname = currencyname;

}

}




MainActivity.java






package com.example.abhinandan.demojsonparsing;


import android.support.v7.app.AppCompatActivity;

import android.os.Bundle;

import android.view.LayoutInflater;

import android.view.View;

import android.view.ViewGroup;

import android.widget.BaseAdapter;

import android.widget.ListView;

import android.widget.TextView;

import android.widget.Toast;

import com.android.volley.RequestQueue;

import com.android.volley.Response;

import com.android.volley.VolleyError;

import com.android.volley.toolbox.StringRequest;

import com.android.volley.toolbox.Volley;

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

import java.util.ArrayList;

public class MainActivity extends AppCompatActivity {


    String urlJsonArray="http://www.wptrafficanalyzer.in/p/demo1/first.php/countries/";

    ArrayList<DemoSetGet> arrayList=new ArrayList<>();

    @Override    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

        sendRequest();
}




    public class MyAdapter extends BaseAdapter {

        @Override        public int getCount() {


            return arrayList.size();

        }

        @Override        public Object getItem(int position) {


            return null;

        }

        @Override        public long getItemId(int position) {


            return 0;

        }

        @Override        public View getView(int position, View convertView, 

                         ViewGroup parent) {

            LayoutInflater inflater = getLayoutInflater();

            convertView = inflater.inflate(R.layout.row, parent, false);

            TextView tvcountryname = (TextView) convertView.findViewById

            (R.id.tvcountryname);

            tvcountryname.setText(arrayList.get(position).getCountryname());


            TextView tvcapital = (TextView) convertView.findViewById(R.id.tvcapital);

            tvcapital.setText(arrayList.get(position).getCapital());


            return convertView;
        }

    private void sendRequest()
}

    {

        StringRequest stringRequest=new StringRequest(urlJsonArray, 

           new Response.Listener<String>() {

            @Override            public void onResponse(String response) {

                showJson(response);
}

        },new Response.ErrorListener()
        {


            @Override            public void onErrorResponse(VolleyError error) 

           {

                Toast.makeText(MainActivity.this,error.getMessage(),

                Toast.LENGTH_LONG).show();


            }
});

        RequestQueue requestQueue = Volley.newRequestQueue(this);

        requestQueue.add(stringRequest);
}

    public void showJson(String json)
    {


        try        {

            JSONObject job=new JSONObject(json);

            JSONArray jarr=job.getJSONArray("countries");

            for(int i=0;i<jarr.length();i++)
            {

                JSONObject j=jarr.getJSONObject(i);

                DemoSetGet s=new DemoSetGet();

                s.setCountryname(j.getString("countryname"));

                s.setCapital(j.getString("capital"));

                arrayList.add(s);

            }
}

        catch (Exception e)
        {

            e.printStackTrace();
}

        ListView lv=(ListView)findViewById(R.id.lv);

        lv.setAdapter(new MyAdapter());


        }

We have to give permissions for Internet access in Manifest file-
}

AndroidManifest.xml






<?xml version="1.0" encoding="utf-8"?><manifest 

xmlns:android="http://schemas.android.com/apk/res/android"    

package="com.example.abhinandan.demojsonparsing">


<uses-permission android:name="android.permission.INTERNET"></uses-permission>


    <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>




After that go to Gradle Scripts and then open build.gradle(Module:app)-







Paste- "compile 'com.mcxiaoke.volley:library-aar:1.0.0'"