Visa/lib/home/asia_view.dart

import 'package:flutter/material.dart';
import 'package:flutter/widgets.dart';
import 'package:flutter_screenutil/flutter_screenutil.dart';
import 'package:hengyi/data/country_entity.dart';
import 'package:hengyi/home/item_country.dart';
import 'package:hengyi/utils/dio_util.dart';

class CountryDataWidget extends StatefulWidget {
  CountryDataWidget(this.id, {super.key});

  final int id;
  @override
  State<CountryDataWidget> createState() => _CountryDataWidgetState();
}

class _CountryDataWidgetState extends State<CountryDataWidget> {
  List<CountryEntity> list = [];
  @override
  void initState() {
    super.initState();
  }

  @override
  Widget build(BuildContext context) {
    return Padding(
      padding: EdgeInsets.only(left: 200.w, right: 200.w),
      child: FutureBuilder(
          future: NetworkUtil().getCountryList(widget.id),
          builder: (context, snapshot) {
            if (snapshot.connectionState == ConnectionState.done) {
              if (snapshot.hasData) {
                list.addAll(snapshot.data!);
                return GridView(
                  gridDelegate: const SliverGridDelegateWithFixedCrossAxisCount(
                    crossAxisCount: 4,
                    childAspectRatio: 1,
                  ),
                  children: List.generate(list.length, (index) {
                    return CountryItemWidget(list[index]);
                  }),
                );
              } else {
                return Text("Error:${snapshot.error}");
              }
            } else {
              return Container(
                alignment: Alignment.center,
                child: const CircularProgressIndicator(),
              );
            }
          }),
    );
  }
}