public static final int NUM_ALREADYDOWNLOADED = 0;

    public static final int NUM_AREYOUSURE = 1;

    private final static String BUNDLE_TASK = "task";

    static DownloadDialogFragment newInstance(DownloadPackage task){

        DownloadDialogFragment dialog = new DownloadDialogFragment();

        Bundle args = new Bundle();

        args.putParcelable(DownloadDialogFragment.BUNDLE_TASK, task);

        dialog.setArguments(args);

        return dialog;

    }

    public Dialog onCreateDialog(Bundle savedInstanceState){

        DownloadPackage task = (DownloadPackage)getArguments().getParcelable(DownloadDialogFragment.BUNDLE_TASK);

        Builder builder = new AlertDialog.Builder(getActivity());

        switch(task.getStatus()){

        case CURRENTVERSION:

        case NEWERVERSION:

            builder.setMessage(R.string.download_areyousure);

            break;

        case OLDERVERSION:

            builder.setMessage(R.string.download_alreadydownloaded);

            break;

        }

        DownloadClicker clicker = new DownloadClicker(task);

        builder.setPositiveButton(android.R.string.yes, clicker);

        builder.setNegativeButton(android.R.string.no, clicker);

        return builder.create();

    }

    class DownloadClicker implements OnClickListener{

        DownloadPackage task = null;

        public DownloadClicker(DownloadPackage _task){

            task = _task;

        }

        public void onClick(DialogInterface dialog, int which) {

            if(which == Dialog.BUTTON_POSITIVE){

                Intent i = new Intent(getActivity(), DownloadListActivity.class);

                i.putExtra(DownloadFragment.EXTRA_TASK, task);

                getActivity().startActivity(i);

            }

        }

    }