Question 127141 in Android Studio Question posted in
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Android Studio – The argument 'Map<String, dynamic>' can't be assigned to the parameter type 'List<Map<String, dynamic>>

i am trying to navigate from one page to another but when i try to call a particular value (stuff), it shows me this error, even though in this case both the argument type and the parameter type are the same

class ProductList extends StatelessWidget {
  final List<Map<String, dynamic>> stuff;
  final Function addProduct;
  final Function updateProduct;


  const ProductList(
    this.stuff, this.addProduct, this.updateProduct, {
    Key? key,
  }) : super(key: key);

  @override
  Widget build(BuildContext context) {
    return ListView.builder(
      itemBuilder: (BuildContext context, int index) {
        return ListTile(
          leading: Image.asset(stuff[index]['image']),
          title: Text(stuff[index]['title']),
          trailing: IconButton(
            icon: Icon(Icons.edit),
            onPressed: (){                           
              Navigator.of(context).push(
                MaterialPageRoute(builder: (BuildContext context) {
                  return ProductCreate(stuff: stuff[index], addProduct: addProduct, updateProduct: updateProduct ,);
                })
              );
            },
          ),
        );
      },
      itemCount: stuff.length,
    );
  }
}

Down below is the productCreate

class ProductCreate extends StatefulWidget {
  final Function addProduct;
  final Function updateProduct;
  final List <Map<String, dynamic>> stuff;


  ProductCreate({required this.addProduct, required this.stuff, required this.updateProduct});


  @override
  State<ProductCreate> createState() => _ProductCreateState();
}

as said, when i tried calling stuff while navigating to the productCreate, it flags that error. im pretty new to flutter so maybe there is something im missing. help would be really appreciated

Tags:

2

Answers


  1. 0

    Im not really sure what a you trying to do. But if you only want to pass a single item to ProductCreate, then try below code.
    Because you only send single item to ProductCreate but the parameter at ProductCreate set to list type.

    class ProductCreate extends StatefulWidget {
  final Function addProduct;
  final Function updateProduct;
  final <Map<String, dynamic>> stuff;


  ProductCreate({required this.addProduct, required this.stuff, required this.updateProduct});


  @override
  State<ProductCreate> createState() => _ProductCreateState();
}
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  2. 0

    you are sending the single item of stuff in the ProductCreate class .. so you just send stuff not stuff[index]

    class ProductList extends StatelessWidget {
  final List<Map<String, dynamic>> stuff;
  final Function addProduct;
  final Function updateProduct;


  const ProductList(
    this.stuff, this.addProduct, this.updateProduct, {
    Key? key,
  }) : super(key: key);

  @override
  Widget build(BuildContext context) {
    return ListView.builder(
      itemBuilder: (BuildContext context, int index) {
        return ListTile(
          leading: Image.asset(stuff[index]['image']),
          title: Text(stuff[index]['title']),
          trailing: IconButton(
            icon: Icon(Icons.edit),
            onPressed: (){                           
              Navigator.of(context).push(
                MaterialPageRoute(builder: (BuildContext context) {
                  return ProductCreate(stuff: stuff, addProduct: addProduct, updateProduct: updateProduct ,);
                })
              );
            },
          ),
        );
      },
      itemCount: stuff.length,
    );
  }
}
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