@Override
    protected void onProgressUpdateInternal(final Integer status) {
        if (activity != null) {
            setMessage(activity.getString(status == STATUS_UPLOAD ? R.string.export_fieldnotes_uploading : R.string.export_fieldnotes_creating) + " (" + fieldNotesCount + ')');
        }
    }
Instantiates and configures the task for exporting field notes.

@param activity optional: Show a progress bar and toasts
@param upload   Upload the Field Note to geocaching.com
@param onlyNew  Upload/export only new logs since last export
main/src/main/java/cgeo/geocaching/export/FieldNoteExportTask.java