Android Multiple Upload Send file to Server and Show Items ProgressBar in ListView

package com.myapp;

import java.io.ByteArrayOutputStream;
import java.io.DataOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.URL;
import java.util.ArrayList;
import java.util.List;

import org.json.JSONException;
import org.json.JSONObject;

import android.app.Activity;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Color;
import android.os.AsyncTask;
import android.os.Bundle;
import android.os.Handler;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.ListView;
import android.widget.ProgressBar;
import android.widget.TextView;


public class MainActivity extends Activity  {
    
    private ListView lstView;
    private Handler handler = new Handler();;
       
    List <String> ImageList;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);        
        
        setContentView(R.layout.activity_main);
        
        /*** Get Images from SDCard ***/
        ImageList = getSD();

        // ListView and imageAdapter
    	lstView = (ListView) findViewById(R.id.listView1);
        lstView.setAdapter(new ImageAdapter(this));
        
    }
    
   
    private List <String> getSD()
    {
	    List <String> it = new ArrayList <String>();
	    File f = new File ("/mnt/sdcard/mydata/");
	    File[] files = f.listFiles ();
	    
	    for (int i = 0; i <files.length; i++)
	    {
	    	File  file = files[i];
	    	Log.d("Count",file.getPath());
		    it.add (file.getPath());
	    }
	    return it;
    }
    
    public class ImageAdapter extends BaseAdapter 
    {
        private Context context;
        
        public ImageAdapter(Context c) 
        {
        	// TODO Auto-generated method stub
            context = c;
        }
 
        public int getCount() {
        	// TODO Auto-generated method stub
            return ImageList.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(final 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);
				}
				
				// ColImgName
				TextView txtName = (TextView) convertView.findViewById(R.id.ColImgName);
				String strPath = ImageList.get(position).toString();
				
				// Get File Name
				String fileName = strPath.substring( strPath.lastIndexOf('/')+1, strPath.length() );
				File file = new File(strPath);
				long length = file.length();
				txtName.setPadding(3, 0, 0, 0);
				txtName.setText(fileName + " ("+length/1024+" KB.)");
				
				// Image Resource
				ImageView imageView = (ImageView) convertView.findViewById(R.id.ColImgPath);
				imageView.getLayoutParams().height = 110;
				imageView.getLayoutParams().width = 110;
				imageView.setPadding(10, 10, 2, 10);
				imageView.setScaleType(ImageView.ScaleType.CENTER_CROP);
				Bitmap bm = BitmapFactory.decodeFile(strPath);
				imageView.setImageBitmap(bm);
				
				
				// ColStatus
				final TextView txtStatus = (TextView) convertView.findViewById(R.id.ColStatus);
				txtStatus.setPadding(3, 0, 0, 0);
				txtStatus.setText("...");
				
				// progressBar
				final ProgressBar progress = (ProgressBar) convertView.findViewById(R.id.progressBar);
				progress.setVisibility(View.GONE);
				progress.setPadding(0, 0, 0, 0);
				
				//btnUpload
				final Button btnUpload = (Button) convertView.findViewById(R.id.btnUpload);
				btnUpload.setTextColor(Color.BLACK);
				btnUpload.setOnClickListener(new View.OnClickListener() {
		            public void onClick(View v) {
		            	// Upload
		            	btnUpload.setEnabled(false);
		            	btnUpload.setTextColor(Color.GRAY);
		            	
		            	startUpload(position);
		            }
		        });
				
		 
				return convertView;
				
		}
    } 
    
    //Upload
	public void startUpload(final int position) {		
		
		Runnable runnable = new Runnable() {
			
			public void run() {
				
				/*
				try {
					Thread.sleep(3000);
				} catch (InterruptedException e1) {
					// TODO Auto-generated catch block
					e1.printStackTrace();
				}
				*/
				
				handler.post(new Runnable() {
					public void run() {
						
			    	    View v = lstView.getChildAt(position - lstView.getFirstVisiblePosition());
			    	    
			    	    // Show ProgressBar
						ProgressBar progress = (ProgressBar)v.findViewById(R.id.progressBar);
			        	progress.setVisibility(View.VISIBLE);
			        	
			    	    // Status
			        	TextView status = (TextView)v.findViewById(R.id.ColStatus);
			        	status.setText("Uploading..");
			    		
						new UploadFileAsync().execute(String.valueOf(position));	
					}
				});

			}
		};
		new Thread(runnable).start();
	}

	
    // Async Upload
    public class UploadFileAsync extends AsyncTask<String, Void, Void> {

    	String resServer;
    	int position;
    	
        protected void onPreExecute() {
        	super.onPreExecute();
        }

        @Override
        protected Void doInBackground(String... params) {
            // TODO Auto-generated method stub
        	position = Integer.parseInt(params[0]);

        	int bytesRead, bytesAvailable, bufferSize;
    		byte[] buffer;
    		int maxBufferSize = 1 * 1024 * 1024;
    		int resCode = 0;
        	String resMessage = "";

        	String lineEnd = "\r\n";
        	String twoHyphens = "--";
        	String boundary =  "*****";
        	
        	// File Path
    	    String strSDPath = ImageList.get(position).toString();
    	    
    	    // Upload to PHP Script
    	    String strUrlServer = "https://www.thaicreate.com/android/uploadFile.php";
    	    
    		try {
    			/** Check file on SD Card ***/
    			File file = new File(strSDPath);
    			if(!file.exists())
    			{
    				resServer = "{\"StatusID\":\"0\",\"Error\":\"Please check path on SD Card\"}";
    				return null;
    			}
    			
    			FileInputStream fileInputStream = new FileInputStream(new File(strSDPath));

    			URL url = new URL(strUrlServer);
    			HttpURLConnection conn = (HttpURLConnection) url.openConnection();
    			conn.setDoInput(true);
    			conn.setDoOutput(true);
    			conn.setUseCaches(false);
    			conn.setRequestMethod("POST");

    			conn.setRequestProperty("Connection", "Keep-Alive");
    			conn.setRequestProperty("Content-Type",
    					"multipart/form-data;boundary=" + boundary);

    			DataOutputStream outputStream = new DataOutputStream(conn
    					.getOutputStream());
    			outputStream.writeBytes(twoHyphens + boundary + lineEnd);
    			outputStream
    					.writeBytes("Content-Disposition: form-data; name=\"filUpload\";filename=\""
    							+ strSDPath + "\"" + lineEnd);
    			outputStream.writeBytes(lineEnd);

    			bytesAvailable = fileInputStream.available();
    			bufferSize = Math.min(bytesAvailable, maxBufferSize);
    			buffer = new byte[bufferSize];

    			// Read file
    			bytesRead = fileInputStream.read(buffer, 0, bufferSize);

    			while (bytesRead > 0) {
    				outputStream.write(buffer, 0, bufferSize);
    				bytesAvailable = fileInputStream.available();
    				bufferSize = Math.min(bytesAvailable, maxBufferSize);
    				bytesRead = fileInputStream.read(buffer, 0, bufferSize);
    			}

    			outputStream.writeBytes(lineEnd);
    			outputStream.writeBytes(twoHyphens + boundary + twoHyphens + lineEnd);

    			// Response Code and  Message
    			resCode = conn.getResponseCode();
    			if(resCode == HttpURLConnection.HTTP_OK)
    			{
                    InputStream is = conn.getInputStream();
                    ByteArrayOutputStream bos = new ByteArrayOutputStream();
                    
                    int read = 0;
                    while ((read = is.read()) != -1) {
                          bos.write(read);
                    }
                    byte[] result = bos.toByteArray();
                    bos.close();
                         
                    resMessage = new String(result);
                    
    			}
    			
    			Log.d("resCode=",Integer.toString(resCode));
    			Log.d("resMessage=",resMessage.toString());

    			fileInputStream.close();
    			outputStream.flush();
    			outputStream.close();
    			
    			resServer = resMessage.toString();
    			
    			
    		} catch (Exception ex) {
    			// Exception handling
    			return null;
    		}
    		
    		return null;
        }

        protected void onPostExecute(Void unused) {
        	statusWhenFinish(position,resServer);
        }

    }
    
    // When UPload Finish
    protected void statusWhenFinish(int position, String resServer) {
    	
	    View v = lstView.getChildAt(position - lstView.getFirstVisiblePosition());
	    
	    // Show ProgressBar
		ProgressBar progress = (ProgressBar)v.findViewById(R.id.progressBar);
    	progress.setVisibility(View.GONE);
    	
    	
	    // Status
    	TextView status = (TextView)v.findViewById(R.id.ColStatus);
    	
        /** Get result from Server (Return the JSON Code)
         * StatusID = ? [0=Failed,1=Complete]
         * Error	= ?	[On case error return custom error message]
         * 
         * Eg Upload Failed = {"StatusID":"0","Error":"Cannot Upload file!"}
         * Eg Upload Complete = {"StatusID":"1","Error":""}
         */
    	
        /*** Default Value ***/
    	String strStatusID = "0";
    	String strError = "Unknow Status!";
    	
    	try {  		
    		
			JSONObject c = new JSONObject(resServer);
        	strStatusID = c.getString("StatusID");
        	strError = c.getString("Error");
		} catch (JSONException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
    	
    	// Prepare Status
		if(strStatusID.equals("0"))
		{
			// When update Failed
	    	status.setText("Upload Failed. ("+ strError +")");
	    	status.setTextColor(Color.RED);
	    	
	    	// Enabled Button again
			Button btnUpload = (Button) v.findViewById(R.id.btnUpload);
			btnUpload.setText("Re-try");
			btnUpload.setTextColor(Color.RED);
			btnUpload.setEnabled(true);
		}
		else
		{
	    	status.setText("Upload Completed.");
	    	status.setTextColor(Color.GREEN);
		}
    	
    }

}