public static final String EXTRA_TASK = "task";

    public static final int MSG_START = 0;

    public static final int MSG_UPDATE = 1;

    public static final int MSG_DONE = 2;

    public static final int MSG_FAILED = 3;

    private boolean boundToService = false;

    private TextView progress_sub;

    private ProgressBar progress;

    private Button /*positive,*/ negative;

    private DownloadPackage pack;

    private Handler messageHandler;

    private Messenger messenger, messengerService;

    public static DownloadFragment getInstance(DownloadPackage task){

        DownloadFragment df = new DownloadFragment();

        Bundle args = new Bundle();

        args.putParcelable(DownloadFragment.EXTRA_TASK, task);

        df.setArguments(args);

        return df;

    }

    public void onActivityCreated(Bundle savedInstanceState){

        super.onActivityCreated(savedInstanceState);

        messageHandler = new Handler(messageCallback);

        messenger = new Messenger(messageHandler);

        Intent i = new Intent(getActivity().getApplicationContext(), DownloadService.class);

        getActivity().startService(i);

        getActivity().bindService(new Intent(getActivity().getApplicationContext(), DownloadService.class), connection, Context.BIND_AUTO_CREATE);

    }

    public View onCreateView(LayoutInflater inflater, ViewGroup viewgroup, Bundle savedInstanceState){

        View v = inflater.inflate(R.layout.download_progress, viewgroup, false);

        progress_sub = (TextView)v.findViewById(R.id.progressbar_sub);

        progress = (ProgressBar)v.findViewById(R.id.progressbar);

        //positive = (Button) v.findViewById(R.id.background);

        negative = (Button) v.findViewById(R.id.cancelDownload);

        //positive.setOnClickListener(backgroundClicker);

        negative.setOnClickListener(cancelClicker);

        pack = getArguments().getParcelable(DownloadFragment.EXTRA_TASK);

        return v;

    }

    private OnClickListener backgroundClicker = new OnClickListener(){

        public void onClick(View v){

            getActivity().finish();

        }

    };

    private OnClickListener cancelClicker = new OnClickListener(){

        public void onClick(View v){

            if(messengerService != null){

                Message message = Message.obtain(messageHandler, DownloadService.MSG_CANCEL, pack);

                try {

                    messengerService.send(message);

                } catch (RemoteException e) {}

            }

            //getActivity().finish();

        }

    };

    private OnClickListener doneClicker = new OnClickListener(){

        public void onClick(View v){

            getActivity().finish();

        }

    };

    private OnClickListener tryAgainClicker = new OnClickListener(){

        public void onClick(View v){

            if(messengerService != null){

                Message message = Message.obtain(messageHandler, DownloadService.MSG_ADDTASK, pack);

                message.replyTo = messenger;

                try {

                    messengerService.send(message);

                } catch (RemoteException e) {

                    e.printStackTrace();

                }

            }

        }

    };

    public void onDestroy(){

        unBindFromService();

        super.onDestroy();

    }

    private ServiceConnection connection = new ServiceConnection(){

        public void onServiceConnected(ComponentName name, IBinder service) {

            messengerService = new Messenger(service);

            try{

                //give the service a task

                if(messengerService != null){

                    Message message = Message.obtain(messageHandler, DownloadService.MSG_ADDTASK, pack);

                    message.replyTo = messenger;

                    messengerService.send(message);

                }

            }catch (RemoteException e){}

        }

        public void onServiceDisconnected(ComponentName name) {

            messengerService = null;

        }

    };

    public void unBindFromService(){

        if(messengerService != null){

            try {

                Message message = Message.obtain(messageHandler, DownloadService.MSG_UNREGISTER_CLIENT, pack);

                message.replyTo = messenger;

                messengerService.send(message);

            } catch (RemoteException e) {

                e.printStackTrace();

            }

        }

        getActivity().unbindService(connection);

    }

    private Handler.Callback messageCallback = new Handler.Callback() {

        public boolean handleMessage(Message msg) {

            switch(msg.what){

            case MSG_START:

                progress.setMax(msg.arg1);

                progress_sub.setText(String.format("%dkb/%dkb\n%s", 0, msg.arg1, ""));

                //positive.setText(R.string.download_background);

                //positive.setOnClickListener(backgroundClicker);

                negative.setText(R.string.download_cancel);

                negative.setOnClickListener(cancelClicker);

                break;

            case MSG_UPDATE:

                progress_sub.setText(String.format("%d%% - %dkb/%dkb\n%s",(msg.arg1*100)/msg.arg2, msg.arg1, msg.arg2, msg.obj));

                progress.setProgress(msg.arg1);

                break;

            case MSG_DONE:

                progress.setProgress(progress.getMax());

                progress_sub.setText(R.string.download_done);

                //  positive.setText(R.string.download_back);

                //  positive.setOnClickListener(doneClicker);

                negative.setVisibility(View.INVISIBLE);

                break;

            case MSG_FAILED:

                progress.setProgress(progress.getMax());

                String errorMsg = getString(R.string.download_failed);

                switch(msg.arg1){

                case DownloadAsyncTask.EXIT_CONNERROR: progress_sub.setText(errorMsg + " " + "Connection error"); break;

                case DownloadAsyncTask.EXIT_FNF: progress_sub.setText(errorMsg + " " + "File not found"); break;

                case DownloadAsyncTask.EXIT_MD5: progress_sub.setText(errorMsg + " " + "MD5 check failed"); break;

                case DownloadAsyncTask.EXIT_URLFAIL: progress_sub.setText(errorMsg + " " + "Invalid url"); break;

                }

                negative.setText(R.string.download_tryagain);

                negative.setOnClickListener(tryAgainClicker);

                break;

            }

            return false;

        }

    };