Upload Android with progress

FileUpload.java

package com.diegogurgel.upload;

import java.io.File;
import java.io.FileInputStream;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.HttpURLConnection;
import java.net.URL;
import java.util.Iterator;

import android.os.AsyncTask;
import android.util.Log;
import android.widget.HeterogeneousExpandableList;
import android.widget.Toast;

public class FileUpload extends AsyncTask<File, Integer, Boolean> {

	@Override
	protected Boolean doInBackground(File... files) {
		try{
			Log.i("TENTANDO", ":)");
			File file = files[0];
			FileInputStream fileInputStream = new FileInputStream(file);
			byte[]bytes = new byte[(int) file.length()];
			fileInputStream.read(bytes);
			fileInputStream.close();
			
			URL postUrl = new URL("http://www.uploadify.com/uploadify/uploadify.php");
			HttpURLConnection connection = (HttpURLConnection) postUrl.openConnection();
			connection.setRequestMethod("POST");
			OutputStream outputStream = connection.getOutputStream();
			
			int bufferLength = 1024;
			for (int i = 0; i < bytes.length; i+=bufferLength) {
				int progress = (int)((i/(float)bytes.length)*100);
				publishProgress(progress);
				if(bytes.length-i>=bufferLength){
					outputStream.write(bytes, i, bufferLength);
					
				}else{
					outputStream.write(bytes, i, bytes.length-i);
				}
			}
			publishProgress(100);
			outputStream.close();
			outputStream.flush();
			InputStream inputStream = connection.getInputStream();
			//Ler resposta
			inputStream.close();
		
		}catch(Exception e){
			e.printStackTrace();
		}
		return null;
	}
	@Override
	protected void onProgressUpdate(Integer... values) {
		Log.i("PROGRESSO", values[0]+"");
		
		//super.onProgressUpdate(values);
	}
	@Override
	protected void onPostExecute(Boolean result) {
		super.onPostExecute(result);
	}

}