Flutter Dynamic Form

main.dart

import 'package:flutter/material.dart';

void main() {
  runApp(MyApp());
}

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      debugShowCheckedModeBanner: false,
      home: Scaffold(
        body: Center(
          child: MyWidget(),
        ),
      ),
    );
  }
}

class MyWidget extends StatelessWidget {
  
  Map formDefinitions = {
    "form_name": "Form Product",
    "fields": [
      {
        "field_name": "Product Name",
        "type": "textfield",
      },
      {
        "field_name": "Price",
        "type": "numberfield",
      },
      {
        "field_name": "Description",
        "type": "textarea",
      }
    ],
  };
  
  
  Widget getUiFieldWidget(field) {
      switch(field["type"]){
        case "textfield":
          
          return TextField(
            decoration: InputDecoration(
              hintText: '',
              labelText: field["field_name"]
            ),
          );
          break;
        case "numberfield":
          
          return TextField(
            decoration: InputDecoration(
              hintText: '',
              labelText: field["field_name"]
            ),
            keyboardType: TextInputType.number
          );
          break;
        case "textarea":
          
          return TextField(
            decoration: InputDecoration(
              hintText: '',
              labelText: field["field_name"]
            ),
            maxLines: 4,
          );
          break;
      }
  }
  
  @override
  Widget build(BuildContext context) {
    var formFields = formDefinitions["fields"];
    
    return Scaffold(
      appBar: AppBar(
        title: Text(formDefinitions["form_name"]),
      ),
      body: Container(
        padding: EdgeInsets.all(10.0),
        child: ListView.builder(
        itemCount: formFields.length,
        itemBuilder: (context, index) {
          var field = formFields[index];
          return getUiFieldWidget(field);
          
        },
      ),
      ),
    );
  }
}