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Widget build(BuildContext context) {
final routeArgs =
    ModalRoute.of(context).settings.arguments as Map<String, String>;
final categoryTitle = routeArgs['title'];
final categoryId = routeArgs['id'];
return Scaffold(
  appBar: AppBar(
    title: Text(categoryTitle),
  ),

Please help me with this This is the error I'm facing with

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  • I suspect that categoryTitle is null, so just check for null title: (categoryTitle != null ? Text(categoryTitle) : "Default title"), Commented Nov 29, 2021 at 14:18
  • routeArgs['title'] is null so check upstream. Commented Nov 29, 2021 at 14:20

1 Answer 1

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i think your routeArgs['title'] is null and when you put it in text it is generating error try

Text(categoryTitle??"")
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