Materi ListView Channel Belajar Pemrogramman

/* Model */
class TreatmentModel {
  final int id_treatment;
  final String nama_treatment,
      kode_treatment,
      fokus_treatment,
      gambar_treatment,
      keterangan_treatment,
      durasi_treatment;

  TreatmentModel({
    this.id_treatment,
    this.nama_treatment,
    this.kode_treatment,
    this.fokus_treatment,
    this.gambar_treatment,
    this.keterangan_treatment,
    this.durasi_treatment,
  });

  factory TreatmentModel.fromJson(Map<String, dynamic> json) {
    return TreatmentModel(
      id_treatment: json['id'] as int,
      nama_treatment: json['treatment'] as String,
      kode_treatment: json['kode'] as String,
      fokus_treatment: json['fokus'] as String,
      durasi_treatment: json['durasi'] as String,
      gambar_treatment: json['image'] as String,
      keterangan_treatment: json['keterangan'] as String,
    );
  }
}



/* Main Page */

import 'dart:convert';
import 'dart:async';

import 'package:flutter/material.dart';
import 'package:flutter/services.dart';
import 'package:http/http.dart' as http;
import 'package:nakamura_data/Treatment_01/model.dart';

class TreatmentPage extends StatefulWidget {
  @override
  _TreatmentPageState createState() => _TreatmentPageState();
}

class _TreatmentPageState extends State<TreatmentPage> {
  List<TreatmentModel> listTreatment;

  @override
  void initState() {
    super.initState();
  }

  Future<List<TreatmentModel>> _tampilkanDataTreatment() async {
    try {
      var jsonResponse = await http.get(
          'http://mobiapp.nakamura.web.id/treatment/treatment/APITreatmentData');

      if (jsonResponse.statusCode == 200) {
        final jsonItems =
            json.decode(jsonResponse.body).cast<Map<String, dynamic>>();

        listTreatment = jsonItems.map<TreatmentModel>((json) {
          return TreatmentModel.fromJson(json);
        }).toList();
      }
    } catch (e) {}

    return listTreatment;
  }

  Future<Null> _refreshTreatment() {
    return _tampilkanDataTreatment().then((_listTreatment) {
      setState(() {
        return listTreatment = _listTreatment;
      });
    });
  }

  @override
  Widget build(BuildContext context) {
    SystemChrome.setSystemUIOverlayStyle(
      SystemUiOverlayStyle(
        statusBarColor: Colors.transparent,
      ),
    );

    return Scaffold(
      appBar: AppBar(
        title: Text('Katalog Treatment'),
      ),
      body: RefreshIndicator(
        onRefresh: _refreshTreatment,
        child: FutureBuilder<List<TreatmentModel>>(
          future: _tampilkanDataTreatment(),
          builder: (context, snapshot) {
            if (!snapshot.hasData)
              return Center(
                child: CircularProgressIndicator(
                  strokeWidth: 3.0,
                ),
              );

            return Container(
              child: ListView(
                padding: EdgeInsets.only(bottom: 160.0),
                children: snapshot.data.map((_data) {
                  return Column(
                    children: <Widget>[
                      Card(
                        child: Column(
                          mainAxisSize: MainAxisSize.min,
                          children: <Widget>[
                            ListTile(
                              leading: Icon(Icons.perm_media),
                              title: Text(_data.nama_treatment),
                              subtitle: Text(_data.fokus_treatment),
                            ),
                          ],
                        ),
                      ),
                    ],
                  );
                }).toList(),
              ),
            );
          },
        ),
      ),
    );
  }
}