api.dart

import 'dart:convert';
import 'package:http/http.dart' as http;
import 'package:shared_preferences/shared_preferences.dart';

class Network {
  final String _url = 'http://192.168.100.207:8080/api/';
  // 192.168.1.2 is my IP, change with your IP address
  var token;

  _getToken() async {
    SharedPreferences localStorage = await SharedPreferences.getInstance();
    token = jsonDecode(localStorage.getString('token'));
  }

  auth(data, apiURL) async {
    var fullUrl = _url + apiURL;
    return await http.post(fullUrl,
        body: jsonEncode(data), headers: _setHeaders());
  }

  getData(apiURL) async {
    var fullUrl = _url + apiURL;
    await _getToken();
    return await http.get(
      fullUrl,
      headers: _setHeaders(),
    );
  }

  deleteData(apiURL, id) async {
    var fullUrl = _url + apiURL + '/' + id.toString();
    await _getToken();
    return await http.delete(
      fullUrl,
      headers: _setHeaders(),
    );
  }

  _setHeaders() => {
        'Content-type': 'application/json',
        'Accept': 'application/json',
        'Authorization': 'Bearer $token',
      };
}

datanasabah.dart

// ignore_for_file: deprecated_member_use

import 'package:flutter/material.dart';
import 'package:flutter_auth/Models/nasabah.dart';
import 'package:flutter_auth/network/nasabah_service.dart';
import 'package:flutter_auth/screens/Menu/DataNasabah/detailnasabah.dart';

import 'package:shared_preferences/shared_preferences.dart';
import 'dart:convert';

class DataNasabah extends StatefulWidget {
  @override
  _DataNasabahState createState() => _DataNasabahState();
}

class _DataNasabahState extends State<DataNasabah> {
  String nama_debitur = '';
  List<Nasabah> _nasabah = [];

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

  _loadUserData() async {
    SharedPreferences localStorage = await SharedPreferences.getInstance();
    var user = jsonDecode(localStorage.getString('user'));

    if (user != null) {
      setState(() {
        nama_debitur = user['nama_debitur'];
      });
    }
  }

  _getNasabah() {
    NasabahService.getUser().then((nasabah) {
      if (mounted) {
        setState(() {
          _nasabah = nasabah;
        });
      }
    });
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      backgroundColor: Colors.white,
      appBar: AppBar(
        title: Text('Data Nasabah'),
        // backgroundColor: Color(0xff151515),
        // automaticallyImplyLeading: false,
      ),
      body: SingleChildScrollView(
        child: PaginatedDataTable(
          rowsPerPage: 10,
          header: Align(
            alignment: Alignment.center,
            child: Text(
              'Data Nasabah',
              style: TextStyle(fontSize: 20, fontWeight: FontWeight.bold),
            ),
          ),
          // Text("Data Nasabah"),
          columns: [
            DataColumn(
              label: Expanded(
                  child: Text(
                'ID Nasabah',
                textAlign: TextAlign.center,
              )),
            ),
            DataColumn(
              label: Expanded(
                  child: Text(
                'Nama Nasabah',
                textAlign: TextAlign.center,
              )),
            ),
            DataColumn(
              label: Expanded(
                  child: Text(
                'Aksi',
                textAlign: TextAlign.center,
              )),
            ),
          ],
          source: NasabahDataTableSource(userData: _nasabah, context: context),
        ),
      ),
    );
  }
}

class NasabahDataTableSource extends DataTableSource {
  BuildContext context;
  NasabahDataTableSource({this.context, this.userData});
  final List<Nasabah> userData;

  @override
  DataRow getRow(int index) {
    return DataRow.byIndex(
      index: index,
      cells: [
        DataCell(Align(
            alignment: Alignment.center,
            child: Text(
              "${userData[index].id}",
            ))),
        DataCell(Align(
          alignment: Alignment.center,
          child: Text("${userData[index].nama_debitur}"),
        )),
        DataCell(
          Row(
            mainAxisAlignment: MainAxisAlignment.spaceBetween,
            children: [
              IconButton(
                icon: Icon(Icons.navigate_next),
                color: Colors.blueAccent,
                onPressed: () {
                  Navigator.push(
                    context,
                    MaterialPageRoute(
                      builder: (context) => DetailNasabah(
                        nasabah: userData[index],
                      ),
                    ),
                  );
                },
              ),
              IconButton(
                icon: Icon(Icons.delete),
                color: Colors.red,
                onPressed: () {
                  showDialog(
                    context: context,
                    builder: (context) => AlertDialog(
                      title: Text('Hapus Data Nasabah'),
                      content: Text(
                          'Apakah anda yakin ingin menghapus data nasabah ini?'),
                      actions: [
                        FlatButton(child: Text('Yes'), onPressed: () {
                          NasabahService.deleteUser(userData[index].id);
                        })
                      ],
                    ),
                  );
                },
              )
            ],
          ),
        ),
        // DataCell(
        //   FlatButton(
        //     child: Icon(
        //       Icons.chevron_right,
        //       color: Colors.red,
        //     ),
        //     onPressed: () {
        //       Navigator.push(
        //         context,
        //         MaterialPageRoute(
        //           builder: (context) => DetailNasabah(
        //             nasabah: userData[index],
        //           ),
        //         ),
        //       );
        //     },
        //   ),
        // ),
      ],
    );
  }

  @override
  bool get isRowCountApproximate => false;

  @override
  int get rowCount => userData.length;

  @override
  int get selectedRowCount => 0;

  void sort<T>(Comparable<T> getField(Nasabah d), bool ascending) {
    userData.sort((Nasabah a, Nasabah b) {
      if (!ascending) {
        final Nasabah c = a;
        a = b;
        b = c;
      }
      final Comparable<T> aValue = getField(a);
      final Comparable<T> bValue = getField(b);
      return Comparable.compare(aValue, bValue);
    });
    notifyListeners();
  }
}

nasabah_service.dart

import 'package:flutter_auth/Models/nasabah.dart';
import 'api.dart';
import 'dart:convert';

class NasabahService {
  static String baseUrl = "mstdebitur";

  static Future<List<Nasabah>> getUser() async {
    final response = await Network().getData(baseUrl);
    List<Nasabah> list = parseResponse(response.body);
    return list;
  }

  static Future<List<Nasabah>> deleteUser(id) async {
    final response = await Network().deleteData(baseUrl, id);
    List<Nasabah> list = parseResponse(response.body);
    return list;
  }

  static List<Nasabah> parseResponse(String responseBody) {
    final parsed = json.decode(responseBody).cast<Map<String, dynamic>>();
    return parsed.map<Nasabah>((json) => Nasabah.fromJson(json)).toList();
  }
}