Customized List View in Android with Optimization

Dear All

Please see the customized List View example in Android with Optimization.
I am using latest Android Studio 2.3.1
Please put 10 images in drawable folder

A. The output will be as

B.  XML files are
a. activity_main.xml is as

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

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

    xmlns:tools="http://schemas.android.com/tools"

    android:layout_width="match_parent"

    android:layout_height="match_parent"

    android:paddingBottom="@dimen/activity_vertical_margin"

    android:paddingLeft="@dimen/activity_horizontal_margin"

    android:paddingRight="@dimen/activity_horizontal_margin"

    android:paddingTop="@dimen/activity_vertical_margin"

    tools:context="com.exam.ravi.listviewex1.MainActivity">


    <ListView

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:id="@+id/listView"

        android:layout_alignParentTop="true"

        android:layout_alignParentStart="true" />
</RelativeLayout>

b. single_row.xml

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

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

    android:layout_width="match_parent"

    android:layout_height="match_parent">

    <ImageView

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:src="@drawable/img4"

        android:layout_margin="10dp"

        android:id="@+id/imageView2"

        android:layout_alignParentTop="true"

        android:layout_alignParentStart="true" />

    <TextView

        android:layout_width="match_parent"

        android:layout_height="30dp"

        android:textAppearance="?android:attr/textAppearanceLarge"

        android:text="Large Text"

        android:id="@+id/textView2"

        android:layout_alignParentTop="true"

        android:layout_toEndOf="@+id/imageView2" />

    <TextView

        android:layout_width="match_parent"

        android:layout_height="20dp"

        android:textAppearance="?android:attr/textAppearanceSmall"

        android:text="Small Text"

        android:id="@+id/textView3"

        android:layout_below="@+id/textView2"

        android:layout_toEndOf="@+id/imageView2" />

</RelativeLayout>

C.  Java Code is as
a. ListFinal.java

package com.exam.ravi.listviewex1;

import android.app.Activity;
import android.os.Bundle;
import android.widget.ListView;

public class ListFinal extends Activity {
    ListView list;
    String membTitles[]={"AUSTRALIA","CANADA","Contry-3","INDIA","NEW ZEALAND",

                    "PAKISTAN","NETHERLAND","Country-8","Country-9","Country-10"};
    String membDesc[]={"Description","Description","Description","Desc","Desc",

                        "Desc","Desc","Desc","Desc","Desc"};
    int images[] = {R.drawable.img1, R.drawable.img2, R.drawable.img3, R.drawable.img4,

                    R.drawable.img5, R.drawable.img6,R.drawable.img7, R.drawable.img8,

                    R.drawable.img9, R.drawable.img10};

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

        list = (ListView) findViewById(R.id.listView);
        MyAdapter adapter = new MyAdapter(this, membTitles, images, membDesc);
        list.setAdapter(adapter);
   }
}

b. MyAdapter.java is 

package com.exam.ravi.listviewex1;

import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.ImageView;
import android.widget.TextView;

/** * Created by Ravi on 2/12/2016. */class MyAdapter extends ArrayAdapter<String> {
    Context context;
    String titleArray[];
    int imgs[];
    String descArray[];

    MyAdapter(Context cob, String titles[], int img[], String desc[]) 
    {
        super(cob, R.layout.single_row, R.id.textView2, titles);
        context = cob;
        imgs = img;
        titleArray = titles;
        descArray = desc;
    }

    class MyViewHolder
    {
        ImageView myImage;
        TextView myTitle;
        TextView myDescription;
        MyViewHolder(View view)
        {

            myImage = (ImageView) view.findViewById(R.id.imageView2);
            myTitle = (TextView) view.findViewById(R.id.textView2);
            myDescription = (TextView) view.findViewById(R.id.textView3);
        }


    }
    @Override    public View getView(int position, View convertView, ViewGroup parent) 
    {
        View row=convertView;
        MyViewHolder myViewHolder=null;
      if(row==null) {
            LayoutInflater inflator = (LayoutInflater) context.getSystemService
                                      (Context.LAYOUT_INFLATER_SERVICE);
            row = inflator.inflate(R.layout.single_row, parent, false);
            myViewHolder  = new MyViewHolder(row);
            row.setTag(myViewHolder);
      }
      else      {
          myViewHolder = (MyViewHolder) row.getTag();
      }
        myViewHolder.myImage.setImageResource(imgs[position]);
        myViewHolder.myTitle.setText(titleArray[position]);
        myViewHolder.myDescription.setText(descArray[position]);
        return row;
    }
}