type 'List<dynamic>' is not a subtype of type 'List<Widget>' How do I use a List<Dynamic> in a listview widget?

Question

I am trying to use a list in a Listview widget in flutter but I keep getting an error saying that I need a List[Widget]. All the answers online make use of maps and I am still a beginner to Flutter. Can anyone show me how to use the map function for this or a way to convert List [Dynamic] to List [Widget]?

Here is my code:

import 'package:flutter/material.dart';

class NextPage extends StatefulWidget {
  final List value;

  NextPage({Key key, this.value}) : super(key: key);

  @override
  _NextPageState createState() => new _NextPageState();
}

class _NextPageState extends State<NextPage> {
  @override
  Widget build(BuildContext context) {
    return new Scaffold(
      appBar: new AppBar(
        title: new Text("Reminders"),
      ),
      body: ListView(
        children: widget.value,
      ),
    );
  }
}

Solution

According to the discussion, value is List<String> in that case, to pass it on ListView we need to use these data and convert them into widget.

Here we are using value and making Text widget with it

import 'package:flutter/material.dart';

class NextPage extends StatefulWidget {
  final List<String> value;

  NextPage({Key key, this.value}) : super(key: key);

  @override
  _NextPageState createState() => new _NextPageState();
}

class _NextPageState extends State<NextPage> {
  @override
  Widget build(BuildContext context) {
    return new Scaffold(
      appBar: new AppBar(
        title: new Text("Reminders"),
      ),
      body: ListView(
       children: widget.value.map((e) => Text(e)).toList(),
      ),
    );
  }
}

Does it solve the issue?

Comments

[Anas Nadeem]

Try children: widget.value as List<Widget>

[StrWrs_Nerd]

That didn't seem to fix the problem, I'm still getting the same error

[Yeasin Sheikh]

what are you passing as value, can you include that. also try flutter clean and run again.

[Yeasin Sheikh]

does it solve or what errors you are currently getting?

[StrWrs_Nerd]

When I use the type cast method the error says type 'List<dynamic>' is not a subtype of type 'List<Widget>' in type cast I am passing in a list of strings that i recieve from an await function like this: _remindersList = await _analyze(Words);

[Yeasin Sheikh]

ok you are just passing list of String at NextPage, am i right?

[StrWrs_Nerd]

Yes I am with this: new NextPage(value: _remindersList),

[Yeasin Sheikh]

in that case we need to use those string and convert them as Widget for ListView. let me update and share a demo.

[StrWrs_Nerd]

Sorry I'm quite new to asking questions on stackoverflow, how do I do that?

[Yeasin Sheikh]

I've updated the answer, does it solve the issue now?

[StrWrs_Nerd]

Am I replacing NextPage with that or _NextPageState?

[Yeasin Sheikh]

Just replace children: widget.value, with widget.value.map((e) => Text(e)).toList(),. hope it will do the work.

[StrWrs_Nerd]

It worked! Thanks for your help

[Yeasin Sheikh]

Glad to help you out.