Exception caught by widgets library, Incorrect use of ParentDataWidget.
Tags: singlechildscrollview, api, pageview, flutter
Published: 2024-06-07 23:55:37

Hi Every one, I'm from Indonesia
i'm a newbie in programming...

I have working with a table while data get from API (in Flutter dart), i made a Scrollable table with Fix First Row (which is the column header) table was successfull and function but it's always show this message in debug console:

Exception caught by widgets library ═══════════════════════════════════
Incorrect use of ParentDataWidget.

is ther anybody help me to solve this, even it's function correctly, those message may be decrease performance application or become an error some day.

My Code is like this:

```
// ignore_for_file: camel_case_types, prefer_interpolation_to_compose_strings

import 'package:bps_cilacap/restAPI/repository_penduduk_kecamatan.dart';
import 'package:flutter/material.dart';
import 'package:bps_cilacap/format_angka.dart';

class JumlahPendudukKecamatanA extends StatefulWidget {
  const JumlahPendudukKecamatanA({Key? key}) : super(key: key);

  @override
  State<JumlahPendudukKecamatanA> createState() =>
      _JumlahPendudukKecamatanAState();
}

RepositoryJumlahPendudukKecamatan jumlahPendudukKecamatan =
    RepositoryJumlahPendudukKecamatan();

class _JumlahPendudukKecamatanAState extends State<JumlahPendudukKecamatanA> {
  @override
  Widget build(BuildContext context) {
    final screenHeight = MediaQuery.of(context).size.height -
        MediaQuery.of(context).padding.top -
        MediaQuery.of(context).padding.bottom;
    // ignore: unused_local_variable
    final screenWidth = MediaQuery.of(context).size.width -
        MediaQuery.of(context).padding.left -
        MediaQuery.of(context).padding.right;
    return Scaffold(
        body: FutureBuilder(
      future: jumlahPendudukKecamatan.getData(),
      builder: (context, snapshot) {
        if (snapshot.hasData) {
          List isipendudukkecamatan = snapshot.data as List;
          return PageView.builder(
            itemCount: 1,
            itemBuilder: (context, index) {
              String kec1 = "  1. " + isipendudukkecamatan[index = 0].kecamatan;
              String kec2 = "  2. " + isipendudukkecamatan[index = 1].kecamatan;
              …
    ……
              String kec24 =24. " + isipendudukkecamatan[index = 23].kecamatan;
              String kab = " " + isipendudukkecamatan[index = 24].kecamatan;

              int lk1 = int.parse(isipendudukkecamatan[index = 0].lk1);
              int lk2 = int.parse(isipendudukkecamatan[index = 1].lk1);
              ……
    …..              
              int lk24 = int.parse(isipendudukkecamatan[index = 23].lk1);
              int lkTotal = int.parse(isipendudukkecamatan[index = 24].lk1);

              int pr1 = int.parse(isipendudukkecamatan[index = 0].pr1);
              int pr2 = int.parse(isipendudukkecamatan[index = 1].pr1);
              int pr3 = int.parse(isipendudukkecamatan[index = 2].pr1);
              ………
    ………
int pr24 = int.parse(isipendudukkecamatan[index = 23].pr1);
              int prTotal = int.parse(isipendudukkecamatan[index = 24].pr1);

             
          return Scaffold(
                body: Column(
                children: <Widget>[
                 
//This is the part of Fixed Row Header
Row(
                    children: [
                      Flexible(
                        fit: FlexFit.tight,
                        flex: 4,
                        child: Container(
                          height: screenHeight * 0.06,
                          padding: const EdgeInsets.symmetric(
                              horizontal: 2, vertical: 10),
                          color: Colors.green,
                          child: const Center(
                            child: Text(
                              "Kecamatan",
                              textAlign: TextAlign.center,
                              style: TextStyle(
                                  color: Colors.white,
                                  fontWeight: FontWeight.bold),
                            ),
                          ),
                        ),
                      ),
                      Flexible(
                        fit: FlexFit.tight,
                        flex: 2,
                        child: Container(
                          height: screenHeight * 0.06,
                          padding: const EdgeInsets.symmetric(
                              horizontal: 2, vertical: 10),
                          color: Colors.green,
                          child: const Center(
                            child: Text(
                              "Lk",
                              style: TextStyle(
                                  color: Colors.white,
                                  fontWeight: FontWeight.bold),
                            ),
                          ),
                        ),
                      ),
                      Flexible(
                        fit: FlexFit.tight,
                        flex: 2,
                        child: Container(
                          height: screenHeight * 0.06,
                          padding: const EdgeInsets.symmetric(
                              horizontal: 2, vertical: 10),
                          color: Colors.green,
                          child: const Center(
                            child: Text(
                              "Pr",
                              style: TextStyle(
                                  color: Colors.white,
                                  fontWeight: FontWeight.bold),
                            ),
                          ),
                        ),
                      ),
                      Flexible(
                        fit: FlexFit.tight,
                        flex: 2,
                        child: Container(
                          height: screenHeight * 0.06,
                          padding: const EdgeInsets.symmetric(
                              horizontal: 2, vertical: 10),
                          color: Colors.green,
                          child: const Center(
                            child: Text(
                              "Lk + Pr",
                              style: TextStyle(
                                  color: Colors.white,
                                  fontWeight: FontWeight.bold),
                            ),
                          ),
                        ),
                      ),
                    ],
                  ),
                                   
 
 // This the part of Scrollable Row

Expanded(
                    child: SingleChildScrollView(
                    child: Flexible(
                      child: SizedBox(
                        width: screenWidth,
                        height: screenHeight,
                        child: Column(
                          children: [
                            //First Row
                            Container(
                              width: screenWidth * 1.0,
                              height: screenHeight * 0.032,
                              color: Colors.transparent,
                              child: Row(
                                children: [
                                  Flexible(
                                    fit: FlexFit.tight,
                                    flex: 4,
                                    child: Container(
                                      color: Colors.transparent,
                                      padding: const EdgeInsets.only(
                                          right: 10, top: 1, bottom: 1),
                                      child: Text(
                                        kec1,
                                        textAlign: TextAlign.left,
                                        style: const TextStyle(
                                            fontWeight: FontWeight.normal),
                                      ),
                                    ),
                                  ),
                                  Flexible(
                                    fit: FlexFit.tight,
                                    flex: 2,
                                    child: Container(
                                      color: Colors.transparent,
                                      padding: const EdgeInsets.only(
                                          right: 10, top: 1, bottom: 1),
                                      child: Text(
                                        Format.convertTo(lk1, 0),
                                        textAlign: TextAlign.right,
                                        style: const TextStyle(
                                            fontWeight: FontWeight.normal),
                                      ),
                                    ),
                                  ),
                                  Flexible(
                                    fit: FlexFit.tight,
                                    flex: 2,
                                    child: Container(
                                      color: Colors.transparent,
                                      padding: const EdgeInsets.only(
                                          right: 10, top: 1, bottom: 1),
                                      child: Text(
                                        Format.convertTo(pr1, 0),
                                        textAlign: TextAlign.right,
                                        style: const TextStyle(
                                            fontWeight: FontWeight.normal),
                                      ),
                                    ),
                                  ),
                                  Flexible(
                                    fit: FlexFit.tight,
                                    flex: 2,
                                    child: Container(
                                      color: Colors.transparent,
                                      padding: const EdgeInsets.only(
                                          right: 5, top: 1, bottom: 1),
                                      child: Text(
                                        Format.convertTo((lk1 + pr2), 0),
                                        textAlign: TextAlign.right,
                                        style: const TextStyle(
                                            fontWeight: FontWeight.normal),
                                      ),
                                    ),
                                  ),
                                ],
                              ),
                            ),

                            //Second row
                            ……
                           //And more row here
                            …
                            //21 st row
                       ),
                      ),
                    ),
                  ))
                ],
              ));
            },
          );
        }
        if (snapshot.hasError) {
          return const Text('Database Error');
        } else {
          return const Center(child: CircularProgressIndicator(strokeWidth: 3));
        }
      },
    ));
  }
}

```

i Hope anyone can help.
PS. Sorry for my english.