public static AlertDialog.Builder newBuilder(final Context context) {
        return new MaterialAlertDialogBuilder(newContextThemeWrapper(context));
    }
displays an input dialog (one or multiple lines)

@param activity     calling activity
@param title        dialog title
@param currentValue if non-null, this will be the prefilled value of the input field
@param label        label / hint for the input field
@param inputType    input type flag mask, use constants defined in class {@link InputType}. If a value below 0 is given then standard input type settings (text) are assumed
@param minLines     minimum amount of input lines to display
@param maxLines     maximum amount of input lines to display (make dialog scrollable, if > 1)
@param callback     method to call on positive confirmation, gets current text as parameter
main/src/main/java/cgeo/geocaching/ui/dialog/Dialogs.java