Sebelumnya baca tutorial : LATIHAN FLUTTER WEEK#3 : SIKAR HALAMAN HOME DENGAN GRIDVIEW

ubah file Absence.dart menjadi

import 'package:flutter/material.dart';
import '../helper/config.dart' as appConfig;

class Absence extends StatelessWidget {

  //VARIABEL
  final data_absen_tgl = appConfig.datas.data_absen_tgl;
  final data_absen_status = appConfig.datas.data_absen_status;

  @override
  Widget build(BuildContext context) {

    return new Scaffold(
      backgroundColor: appConfig.colors.ColorPrimaryDark,
      body: new Container(
        decoration: BoxDecoration(color: appConfig.colors.ColorPrimaryDark),
        child: ListView.builder(
            itemCount: data_absen_tgl.length,
            itemBuilder: (context, index) {
              final absen_tgl = data_absen_tgl[index];
              final absen_status = appConfig.absen.findAbsenStatus(data_absen_status[index]);
              final absen_icon = appConfig.absen.findAbsenIcon(data_absen_status[index]);
              
              
              return Container(
                margin: EdgeInsets.all(5.0),
                decoration: BoxDecoration(color: appConfig.colors.ColorPrimary),
                child: ListTile(
                  
                  //ICON
                  leading: Image.asset(absen_icon),


                  //STATUS
                  title: Text(
                    absen_status,
                    style: TextStyle(
                      color: appConfig.colors.ColorTeks,
                      fontWeight: FontWeight.bold,
                      fontSize: 15.0,
                    ),
                  ),

                  
                  //TANGGAL
                  trailing: Text(
                    absen_tgl,
                    style: TextStyle(
                      color: appConfig.colors.ColorTeks,
                      fontWeight: FontWeight.bold,
                      fontSize: 15.0,
                    ),
                  ),
                  

                ),
              );
            }),
      ),
    );
  }
}

Semoga Bermanfaat