CustomList View With JSONobject and Servlet Using Android Asynchronous Http Client | Tutorial 4

Android Side : Create project in android use EmptyActivity.

Visit First Tutorial for Connection Between Server and Android
click here How to Connect Android App with Java Server?

Add Library  in android side >>http://loopj.com/android-async-http/

YouTube Channel :

MainActivity: put below code in your MainActivity.java

MainActivity

 package com.example.aaru.jsonapp;  
 import android.support.v7.app.AppCompatActivity;  
 import android.os.Bundle;  
 import android.widget.ListView;  
 import android.widget.Toast;  
 import com.loopj.android.http.AsyncHttpClient;  
 import com.loopj.android.http.JsonHttpResponseHandler;  
 import org.json.JSONArray;  
 import org.json.JSONException;  
 import org.json.JSONObject;  
 import java.lang.reflect.Array;  
 import java.util.ArrayList;  
 import cz.msebera.android.httpclient.Header;  
 public class MainActivity extends AppCompatActivity {  
   ListView listView;  
   ArrayList<StudentBeam>allist;  
   AsyncHttpClient asyncHttpClient;  
   String My_URL="http://192.168.43.157:8080/StudentApp/StudentServlet";  
   StudentBeam beam;  
   @Override  
   protected void onCreate(Bundle savedInstanceState) {  
     super.onCreate(savedInstanceState);  
     setContentView(R.layout.activity_main);  
     allist=new ArrayList<>();  
     getData();  
     Toast.makeText(MainActivity.this, "onSuccess", Toast.LENGTH_SHORT).show();  
     listView= (ListView) findViewById(R.id.listView);  
   }  
   private void getData() {  
     //add asynhttp client lib.....  
     asyncHttpClient=new AsyncHttpClient();  
     asyncHttpClient.get(My_URL,new JsonHttpResponseHandler(){  
       @Override  
       public void onSuccess(int statusCode, Header[] headers, JSONArray response) {  
         super.onSuccess(statusCode, headers, response);  
         for (int i=0;i<response.length(); i++){  
           try {  
             Toast.makeText(MainActivity.this, "onSuccess", Toast.LENGTH_SHORT).show();  
             JSONObject object=response.getJSONObject(i);  
             beam=new StudentBeam(object.get("name").toString(),object.get("address").toString(),object.get("phone").toString());  
             //also check json object key  
             Toast.makeText(MainActivity.this, "onSuccess"+beam.getName().toString(), Toast.LENGTH_SHORT).show();  
             allist.add(beam);  
             CustomAdapter adapter=new CustomAdapter(MainActivity.this,allist);  
             listView.setAdapter(adapter);  
           } catch (JSONException e) {  
             e.printStackTrace();  
           }  
         }  
       }  
       @Override  
       public void onFailure(int statusCode, Header[] headers, Throwable throwable, JSONArray errorResponse) {  
         super.onFailure(statusCode, headers, throwable, errorResponse);  
         Toast.makeText(MainActivity.this, "onFailed", Toast.LENGTH_SHORT).show();  
       }  
     });  
   }  
 }  

StudentBeam : Create Java class.Put below data (The Student beam is  Add multiple data in array list).

StudentBeam

 package com.example.aaru.jsonapp;  
 /**  
  * Created by Aaru on 10/9/2017.  
  */  
 public class StudentBeam {  
   public String getName() {  
     return Name;  
   }  
   public void setName(String name) {  
     Name = name;  
   }  
   public String getAddress() {  
     return Address;  
   }  
   public void setAddress(String address) {  
     Address = address;  
   }  
   public String getPhone() {  
     return Phone;  
   }  
   public void setPhone(String phone) {  
     Phone = phone;  
   }  
   String Name;  
   String Address;  
   String Phone;  
   public StudentBeam(String Name,String Address,String Phone){  
     this.Name=Name;  
     this.Address=Address;  
     this.Phone=Phone;  
   }  
 }  

CustomAdapter : Create Java Class name is CustomAdapter and extend with BaseAdapter.

CustomAdapter

 package com.example.aaru.jsonapp;  
 import android.content.Context;  
 import android.view.LayoutInflater;  
 import android.view.View;  
 import android.view.ViewGroup;  
 import android.widget.BaseAdapter;  
 import android.widget.TextView;  
 import java.util.ArrayList;  
 /**  
  * Created by Aaru on 10/9/2017.  
  */  
 public class CustomAdapter extends BaseAdapter {  
   ArrayList<StudentBeam> list;  
   Context context;  
   LayoutInflater inflater;  
   public CustomAdapter(Context context,ArrayList<StudentBeam> list){  
     this.list=list;  
     this.context=context;  
     inflater=(LayoutInflater)context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);  
   }  
   @Override  
   public int getCount() {  
     return list.size();  
   }  
   @Override  
   public Object getItem(int position) {  
     return list.get(position);  
   }  
   @Override  
   public long getItemId(int position) {  
     return position;  
   }  
   @Override  
   public View getView(int position, View convertView, ViewGroup parent) {  
     ViewHolder holder=new ViewHolder();  
     if (convertView==null) {  
       convertView = inflater.inflate(R.layout.raw, null);  
       holder.name= (TextView) convertView.findViewById(R.id.txtName);  
       holder.Address= (TextView) convertView.findViewById(R.id.txtAddress);  
       holder.Phone= (TextView) convertView.findViewById(R.id.txtPhone);  
       convertView.setTag(holder);  
       holder.name.setText(list.get(position).getName());  
       holder.Address.setText(list.get(position).getAddress());  
       holder.Phone.setText(list.get(position).getPhone());  
     }else {  
       holder= (ViewHolder) convertView.getTag();  
     }  
     return convertView;  
   }  
   private class ViewHolder{  
     TextView name;  
     TextView Address;  
     TextView Phone;  
   }  
 }  

>>>>>>>>>>>>>>>>>>>Run App and Enjoy<<<<<<<<<<<<<<<<<<<<<

 >>>>>>>>>>>>>>>>>>>Also Comment below<<<<<<<<<<<<<<<<<<<<<