vn_payment_gen 0.0.4
vn_payment_gen: ^0.0.4 copied to clipboard
A Flutter package for Vietnamese payment solutions, supporting VietQR generation, bank information lookup, and business tax code verification.
example/lib/main.dart
import 'package:flutter/material.dart';
import 'dart:async';
import 'package:flutter/services.dart';
import 'package:vn_payment_gen/vn_payment_gen.dart';
import 'package:vn_payment_gen/models/index.dart';
import 'package:vn_payment_gen/widgets/viet_qr_image.dart';
import 'business_lookup_page.dart';
void main() async {
WidgetsFlutterBinding.ensureInitialized();
// Khởi tạo VnPaymentGen trước khi chạy ứng dụng
await VnPaymentGen.init();
runApp(const MyApp());
}
class MyApp extends StatelessWidget {
const MyApp({super.key});
@override
Widget build(BuildContext context) {
return MaterialApp(
theme: ThemeData(
primarySwatch: Colors.blue,
useMaterial3: true,
),
home: const HomeScreen(),
);
}
}
class HomeScreen extends StatefulWidget {
const HomeScreen({super.key});
@override
State<HomeScreen> createState() => _HomeScreenState();
}
class _HomeScreenState extends State<HomeScreen> {
String _platformVersion = 'Unknown';
List<Bank>? _banks;
bool _isLoading = false;
String _errorMessage = '';
Bank? _selectedBank;
final TextEditingController _accountController = TextEditingController();
final TextEditingController _amountController = TextEditingController();
final TextEditingController _descriptionController = TextEditingController();
@override
void initState() {
super.initState();
initPlatformState();
_loadBanks();
}
@override
void dispose() {
_accountController.dispose();
_amountController.dispose();
_descriptionController.dispose();
super.dispose();
}
// Platform messages are asynchronous, so we initialize in an async method.
Future<void> initPlatformState() async {
String platformVersion;
// Platform messages may fail, so we use a try/catch PlatformException.
// We also handle the message potentially returning null.
try {
platformVersion =
await VnPaymentGen.instance.getPlatformVersion() ?? 'Unknown platform version';
} on PlatformException {
platformVersion = 'Failed to get platform version.';
}
// If the widget was removed from the tree while the asynchronous platform
// message was in flight, we want to discard the reply rather than calling
// setState to update our non-existent appearance.
if (!mounted) return;
setState(() {
_platformVersion = platformVersion;
});
}
Future<void> _loadBanks() async {
setState(() {
_isLoading = true;
_errorMessage = '';
});
try {
final response = await VnPaymentGen.instance.getBanks();
setState(() {
_banks = response.data;
_isLoading = false;
});
} catch (e) {
setState(() {
_errorMessage = e.toString();
_isLoading = false;
});
}
}
void _navigateToBusinessLookup() {
Navigator.of(context).push(
MaterialPageRoute(builder: (context) => const BusinessLookupPage())
);
}
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: const Text('VietQR Demo'),
actions: [
IconButton(
icon: const Icon(Icons.business),
tooltip: 'Tra cứu mã số thuế',
onPressed: _navigateToBusinessLookup,
),
],
),
body: Column(
children: [
Padding(
padding: const EdgeInsets.all(16.0),
child: Text('Running on: $_platformVersion'),
),
Expanded(
child: _isLoading
? const Center(child: CircularProgressIndicator())
: _errorMessage.isNotEmpty
? Center(child: Text('Error: $_errorMessage'))
: SingleChildScrollView(
child: Padding(
padding: const EdgeInsets.all(16.0),
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
const Text(
'Danh sách ngân hàng:',
style: TextStyle(
fontSize: 16,
fontWeight: FontWeight.bold,
),
),
const SizedBox(height: 8),
Container(
decoration: BoxDecoration(
border: Border.all(color: Colors.grey),
borderRadius: BorderRadius.circular(8),
),
padding: const EdgeInsets.symmetric(horizontal: 16),
child: DropdownButton<Bank>(
value: _selectedBank,
isExpanded: true,
underline: const SizedBox(),
hint: const Text('Chọn ngân hàng'),
items: _banks?.map((bank) {
return DropdownMenuItem<Bank>(
value: bank,
child: Row(
children: [
Image.network(
bank.logo,
width: 40,
height: 40,
errorBuilder: (context, error, stackTrace) =>
const Icon(Icons.account_balance),
),
const SizedBox(width: 8),
Expanded(
child: Text(
bank.shortName,
overflow: TextOverflow.ellipsis,
),
),
],
),
);
}).toList(),
onChanged: (bank) {
setState(() {
_selectedBank = bank;
});
},
),
),
const SizedBox(height: 16),
TextField(
controller: _accountController,
decoration: const InputDecoration(
labelText: 'Số tài khoản',
border: OutlineInputBorder(),
),
keyboardType: TextInputType.number,
),
const SizedBox(height: 16),
TextField(
controller: _amountController,
decoration: const InputDecoration(
labelText: 'Số tiền (không bắt buộc)',
border: OutlineInputBorder(),
),
keyboardType: TextInputType.number,
),
const SizedBox(height: 16),
TextField(
controller: _descriptionController,
decoration: const InputDecoration(
labelText: 'Nội dung chuyển khoản (không bắt buộc)',
border: OutlineInputBorder(),
),
),
const SizedBox(height: 24),
if (_selectedBank != null && _accountController.text.isNotEmpty)
Center(
child: Column(
children: [
const Text(
'Mã QR:',
style: TextStyle(
fontSize: 16,
fontWeight: FontWeight.bold,
),
),
const SizedBox(height: 16),
VietQrImage(
bankId: _selectedBank!.bin,
accountNo: _accountController.text,
template: VnPaymentGen.templateCompact,
amount: _amountController.text.isNotEmpty
? int.tryParse(_amountController.text)
: null,
addInfo: _descriptionController.text.isNotEmpty
? _descriptionController.text
: null,
width: 250,
height: 250,
),
],
),
),
],
),
),
),
),
],
),
floatingActionButton: FloatingActionButton(
onPressed: _loadBanks,
child: const Icon(Icons.refresh),
),
);
}
}