How to create Android listview with checkbox

CustomAdapter.java

package com.example.admin.listviewcheckbox;

import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.BaseAdapter;
import android.widget.CheckBox;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.Toast;

import org.w3c.dom.Text;

import java.util.List;

/**
 * Created by admin on 12-02-2016.
 */
public class CustomAdapter extends ArrayAdapter {

    Model[] modelItems=null;
    Context context;
    ListView listview;
    LayoutInflater inflater=null;

    public CustomAdapter(Context context, Model[] resource, ListView listView) {
        super(context,R.layout.row_view, resource);
        this.listview=listView;
        this.context=context;
        this.modelItems=resource;
        inflater= (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
    }

    public class Holder
    {
        CheckBox checkBox;
        TextView tv;
    }

    @Override
    public View getView(final int position, View convertView, ViewGroup parent) {
        Holder holder;
        View rowView = null;
        if(convertView==null) {
            rowView = inflater.inflate(R.layout.row_view, null);
            holder=new Holder();
            holder.tv=(TextView) rowView.findViewById(R.id.text_view);
            holder.checkBox= (CheckBox) rowView.findViewById(R.id.check_box);

            holder.tv.setText(modelItems[position].getName());
            if(modelItems[position].getValue()==1) {
                holder.checkBox.setChecked(true);
            }
            else
            {
                holder.checkBox.setChecked(false);
            }
            rowView.setTag(holder);
        }
        else {
        holder= (Holder) convertView.getTag();
        }

        holder.checkBox.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
            for(int i=0;i<modelItems.length;i++)
            {
                modelItems[i]= new Model(modelItems[i].getName(),0);
            }
                modelItems[position]= new Model(modelItems[position].getName(),1);
                listview.setAdapter(new CustomAdapter(context,modelItems,listview));
            }

        });

        return rowView;
    }
}

MainActivity.java

package com.example.admin.listviewcheckbox;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.ListView;
import android.widget.Toast;

import java.util.ArrayList;

public class MainActivity extends AppCompatActivity {
Model[] models;
    CustomAdapter adapter;
    ListView listView;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        models=new Model[7];
        models[0]=new Model("Dotsquares",0);
        models[1]=new Model("Sony",0);
        models[2]=new Model("Samsung",0);
        models[3]=new Model("Apple",0);
        models[4]=new Model("Lenovo",1);
        models[5]=new Model("Intex",0);
        models[6]=new Model("Iball",0);

        listView= (ListView) findViewById(R.id.list_item);
        adapter=new CustomAdapter(this,models,listView);

        listView.setAdapter(adapter);


        Button saveButton= (Button) findViewById(R.id.save);

        saveButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                StringBuffer selectedText=new StringBuffer();
                selectedText.append("SELECTED TEXTS ARE: \n\n");
                   Model[] getModel=adapter.modelItems;
                for(int i=0;i<getModel.length;i++)
                {
                    if(getModel[i].getValue()==1)
                    {
                        selectedText.append(getModel[i].getName()+"\n");
                    }
                }
                Toast.makeText(getApplicationContext(),selectedText,Toast.LENGTH_LONG).show();

            }
        });

    }
}

Model.java

package com.example.admin.listviewcheckbox;

/**
 * Created by admin on 12-02-2016.
 */
public class Model {
    String name;
    int value;

    Model(String name,int value)
    {
        this.name=name;
        this.value=value;
    }
    public String getName()
    {
        return name;
    }
    public int getValue()
    {
        return value;
    }
}

Layouts

activity_main.xml

<LinearLayout
    android:layout_height="fill_parent"
    android:layout_width="fill_parent"
    android:orientation="vertical"
    xmlns:android="http://schemas.android.com/apk/res/android">

    <ListView
        android:id="@+id/list_item"
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:layout_weight="1"/>

    <Button
        android:id="@+id/save"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="save"
       android:paddingTop="14dp"
        android:gravity="center_horizontal"/>

</LinearLayout>

row_view.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="horizontal">
    <CheckBox
        android:id="@+id/check_box"
        android:layout_width="50dp"
        android:layout_height="50dp" />
    <TextView
        android:id="@+id/text_view"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginTop="3dp"
        android:text="test"
        android:textSize="25dp"/>

</LinearLayout>

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