Android แสดงรูปภาพ ImageView จาก Web URL ของเว็บไซต์ บน ListView

package com.myapp;

import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.ByteArrayOutputStream;
import java.io.Closeable;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.URL;
import java.util.ArrayList;
import java.util.HashMap;

import android.os.Bundle;
import android.os.StrictMode;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.BaseAdapter;
import android.widget.ImageView;
import android.widget.ListView;
import android.widget.TextView;
import android.annotation.SuppressLint;
import android.app.Activity;
import android.app.AlertDialog;
import android.content.Context;
import android.content.DialogInterface;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;

public class MainActivity extends Activity {

    @SuppressLint("NewApi")
	@Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        
        // Permission StrictMode
        if (android.os.Build.VERSION.SDK_INT > 9) {
            StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder().permitAll().build();
            StrictMode.setThreadPolicy(policy);
        }
        
        
    	final ArrayList<HashMap<String, String>> MyArrList = new ArrayList<HashMap<String, String>>();
		HashMap<String, String> map;
		
		/*** Rows 1 ***/
		map = new HashMap<String, String>();
		map.put("ImageID", "1");
		map.put("ImageDesc", "Sea View1");
		map.put("ImagePath", "https://www.thaicreate.com/android/pic_a.png");
		MyArrList.add(map);
		
		/*** Rows 2 ***/
		map = new HashMap<String, String>();
		map.put("ImageID", "2");
		map.put("ImageDesc", "Sea View2");
		map.put("ImagePath", "https://www.thaicreate.com/android/pic_b.png");
		MyArrList.add(map);	
		
		/*** Rows 3 ***/
		map = new HashMap<String, String>();
		map.put("ImageID", "3");
		map.put("ImageDesc", "Sea View 3");
		map.put("ImagePath", "https://www.thaicreate.com/android/pic_c.png");
		MyArrList.add(map);
		
		/*** Rows 4 ***/
		map = new HashMap<String, String>();
		map.put("ImageID", "4");
		map.put("ImageDesc", "Sea View 4");
		map.put("ImagePath", "https://www.thaicreate.com/android/pic_d.png");
		MyArrList.add(map);			
		
        // listView1
        final ListView lstView1 = (ListView)findViewById(R.id.listView1); 
        	
        lstView1.setAdapter(new ImageAdapter(this,MyArrList));
        
        // OnClick
        
        final AlertDialog.Builder imageDialog = new AlertDialog.Builder(this);
        final LayoutInflater inflater = (LayoutInflater) this.getSystemService(LAYOUT_INFLATER_SERVICE);
        
        lstView1.setOnItemClickListener(new OnItemClickListener() {
			public void onItemClick(AdapterView<?> parent, View v,
				int position, long id) {
				
                View layout = inflater.inflate(R.layout.custom_fullimage_dialog,
                        (ViewGroup) findViewById(R.id.layout_root));
                ImageView image = (ImageView) layout.findViewById(R.id.fullimage);
                image.setPadding(5, 5, 5, 5);
                
	           	 try
	           	 {
	           		image.setImageBitmap(loadBitmap(MyArrList.get(position).get("ImagePath")));
	           	 } catch (Exception e) {
	           		 // When Error
	           		image.setImageResource(android.R.drawable.ic_menu_report_image);
	           	 }
				
                imageDialog.setIcon(android.R.drawable.btn_star_big_on);	
        		imageDialog.setTitle("View : " + MyArrList.get(position).get("ImageDesc"));
                imageDialog.setView(layout);
                imageDialog.setPositiveButton(android.R.string.ok, new DialogInterface.OnClickListener(){

                    public void onClick(DialogInterface dialog, int which) {
                        dialog.dismiss();
                    }

                });


                imageDialog.create();
                imageDialog.show(); 
		    	
			}
		});
      
    }
             
    
    public class ImageAdapter extends BaseAdapter 
    {
        private Context context;
        private ArrayList<HashMap<String, String>> MyArr = new ArrayList<HashMap<String, String>>();

        public ImageAdapter(Context c, ArrayList<HashMap<String, String>> list) 
        {
        	// TODO Auto-generated method stub
            context = c;
            MyArr = list;
        }
 
        public int getCount() {
        	// TODO Auto-generated method stub
            return MyArr.size();
        }
 
        public Object getItem(int position) {
        	// TODO Auto-generated method stub
            return position;
        }
 
        public long getItemId(int position) {
        	// TODO Auto-generated method stub
            return position;
        }
		public View getView(int position, View convertView, ViewGroup parent) {
			// TODO Auto-generated method stub
			
			LayoutInflater inflater = (LayoutInflater) context
					.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
		 		 
			if (convertView == null) {
				convertView = inflater.inflate(R.layout.activity_column, null); 
			}
		 
					// ColImage
				ImageView imageView = (ImageView) convertView.findViewById(R.id.ColImgPath);
				imageView.getLayoutParams().height = 100;
				imageView.getLayoutParams().width = 100;
				imageView.setScaleType(ImageView.ScaleType.CENTER_CROP);
            	 try
            	 {
            		 imageView.setImageBitmap(loadBitmap(MyArr.get(position).get("ImagePath")));
            	 } catch (Exception e) {
            		 // When Error
            		 imageView.setImageResource(android.R.drawable.ic_menu_report_image);
            	 }
					
				// ColPosition
				TextView txtPosition = (TextView) convertView.findViewById(R.id.ColImgID);
				txtPosition.setPadding(10, 0, 0, 0);
				txtPosition.setText("ID : " + MyArr.get(position).get("ImageID"));
				
				// ColPicname
				TextView txtPicName = (TextView) convertView.findViewById(R.id.ColImgDesc);
				txtPicName.setPadding(50, 0, 0, 0);
				txtPicName.setText("Desc : " + MyArr.get(position).get("ImageDesc"));

				
	 
			return convertView;
				
		}

    } 
    
    
    /***** Get Image Resource from URL (Start) *****/
	private static final String TAG = "ERROR";
	private static final int IO_BUFFER_SIZE = 4 * 1024;
	public static Bitmap loadBitmap(String url) {
	    Bitmap bitmap = null;
	    InputStream in = null;
	    BufferedOutputStream out = null;

	    try {
	        in = new BufferedInputStream(new URL(url).openStream(), IO_BUFFER_SIZE);

	        final ByteArrayOutputStream dataStream = new ByteArrayOutputStream();
	        out = new BufferedOutputStream(dataStream, IO_BUFFER_SIZE);
	        copy(in, out);
	        out.flush();

	        final byte[] data = dataStream.toByteArray();
	        BitmapFactory.Options options = new BitmapFactory.Options();
	        //options.inSampleSize = 1;

	        bitmap = BitmapFactory.decodeByteArray(data, 0, data.length,options);
	    } catch (IOException e) {
	        Log.e(TAG, "Could not load Bitmap from: " + url);
	    } finally {
	        closeStream(in);
	        closeStream(out);
	    }

	    return bitmap;
	}

	 private static void closeStream(Closeable stream) {
	        if (stream != null) {
	            try {
	                stream.close();
	            } catch (IOException e) {
	                android.util.Log.e(TAG, "Could not close stream", e);
	            }
	        }
	    }
	 
	 private static void copy(InputStream in, OutputStream out) throws IOException {
        byte[] b = new byte[IO_BUFFER_SIZE];
        int read;
        while ((read = in.read(b)) != -1) {
            out.write(b, 0, read);
        }
    }
	 /***** Get Image Resource from URL (End) *****/
    
    
    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        getMenuInflater().inflate(R.menu.activity_main, menu);
        return true;
    }

}