【发布时间】：2021-01-03 07:14:30
【问题描述】：
我是 Flutter 新手，所以请帮助我。我想将此值 user provider.userModel.total cart price / 100 传递给 open checkout()
当用户点击结帐时，它会重定向到 Razorpay 支付网关。
代码：
import 'package:flutter_ecommerce/helpers/style.dart';
import 'package:flutter_ecommerce/models/cart_item.dart';
import 'package:flutter_ecommerce/provider/app_provider.dart';
import 'package:flutter_ecommerce/provider/user_provider.dart';
import 'package:flutter_ecommerce/services/order.dart';
import 'package:flutter_ecommerce/widgets/custom_text.dart';
import 'package:flutter_ecommerce/widgets/loading.dart';
import 'package:flutter/material.dart';
import 'package:fluttertoast/fluttertoast.dart';
import 'package:provider/provider.dart';
import 'package:uuid/uuid.dart';
import 'package:razorpay_flutter/razorpay_flutter.dart';
class CartScreen extends StatefulWidget {
@override
_CartScreenState createState() => _CartScreenState();
}
class _CartScreenState extends State<CartScreen> {
final _key = GlobalKey<ScaffoldState>();
OrderServices _orderServices = OrderServices();
Razorpay razorpay;
@override
void initState() {
// TODO: implement initState
super.initState();
razorpay = new Razorpay();
razorpay.on(Razorpay.EVENT_PAYMENT_SUCCESS, handlePaymentSuccess);
razorpay.on(Razorpay.EVENT_PAYMENT_ERROR, handleErrorFailure);
razorpay.on(Razorpay.EVENT_EXTERNAL_WALLET, handleExternalWallet);
}
@override
void dispose() {
// TODO: implement dispose
super.dispose();
razorpay.clear();
}
UserProvider userProvider;
void openCheckout() {
var options = {
"key": "rzp_test_UhHkdZJX3q5bRq",
"amount": userProvider.userModel.totalCartPrice,
"name": "Payment",
"description": "Payment for the product",
"prefill": {
"contact": "",
"email": "",
},
"external": {
"wallets": ["paytm"]
}
};
try {
razorpay.open(options);
} catch (e) {
print(e.toString());
}
}
void handlePaymentSuccess(PaymentSuccessResponse response) {
Fluttertoast.showToast(msg: "SUCCESS: " + response.paymentId);
}
void handleErrorFailure(PaymentFailureResponse response) {
Fluttertoast.showToast(
msg: "ERROR: " + response.code.toString() + " - " + response.message);
}
void handleExternalWallet(ExternalWalletResponse response) {
Fluttertoast.showToast(msg: "EXTERNAL_WALLET: " + response.walletName);
}
@override
Widget build(BuildContext context) {
final userProvider = Provider.of<UserProvider>(context);
final appProvider = Provider.of<AppProvider>(context);
return Scaffold(
key: _key,
appBar: AppBar(
iconTheme: IconThemeData(color: black),
backgroundColor: white,
elevation: 0.0,
title: CustomText(text: "Shopping Cart"),
leading: IconButton(
icon: Icon(Icons.close),
onPressed: () {
Navigator.pop(context);
}),
),
backgroundColor: white,
body: appProvider.isLoading
? Loading()
: ListView.builder(
itemCount: userProvider.userModel.cart.length,
itemBuilder: (_, index) {
return Padding(
padding: const EdgeInsets.all(16),
child: Container(
height: 120,
decoration: BoxDecoration(
borderRadius: BorderRadius.circular(20),
color: white,
boxShadow: [
BoxShadow(
color: red.withOpacity(0.2),
offset: Offset(3, 2),
blurRadius: 30)
]),
child: Row(
children: <Widget>[
ClipRRect(
borderRadius: BorderRadius.only(
bottomLeft: Radius.circular(20),
topLeft: Radius.circular(20),
),
child: Image.network(
userProvider.userModel.cart[index].image,
height: 120,
width: 140,
fit: BoxFit.fill,
),
),
SizedBox(
width: 10,
),
Expanded(
child: Row(
mainAxisAlignment: MainAxisAlignment.spaceBetween,
children: <Widget>[
RichText(
text: TextSpan(children: [
TextSpan(
text: userProvider
.userModel.cart[index].name +
"\n",
style: TextStyle(
color: black,
fontSize: 20,
fontWeight: FontWeight.bold)),
TextSpan(
text:
"\$${userProvider.userModel.cart[index].price / 100} \n\n",
style: TextStyle(
color: black,
fontSize: 18,
fontWeight: FontWeight.w300)),
TextSpan(
text: "Quantity: ",
style: TextStyle(
color: grey,
fontSize: 16,
fontWeight: FontWeight.w400)),
TextSpan(
text: userProvider
.userModel.cart[index].quantity
.toString(),
style: TextStyle(
color: primary,
fontSize: 16,
fontWeight: FontWeight.w400)),
]),
),
IconButton(
icon: Icon(
Icons.delete,
color: red,
),
onPressed: () async {
appProvider.changeIsLoading();
bool success =
await userProvider.removeFromCart(
cartItem: userProvider
.userModel.cart[index]);
if (success) {
userProvider.reloadUserModel();
print("Item removed from cart");
_key.currentState.showSnackBar(SnackBar(
content: Text("Removed from Cart!")));
appProvider.changeIsLoading();
return;
} else {
appProvider.changeIsLoading();
}
})
],
),
)
],
),
),
);
}),
bottomNavigationBar: Container(
height: 70,
child: Padding(
padding: const EdgeInsets.all(8.0),
child: Row(
mainAxisAlignment: MainAxisAlignment.spaceBetween,
children: <Widget>[
RichText(
text: TextSpan(children: [
TextSpan(
text: "Total: ",
style: TextStyle(
color: grey,
fontSize: 22,
fontWeight: FontWeight.w400)),
TextSpan(
text: " \$${userProvider.userModel.totalCartPrice / 100}",
style: TextStyle(
color: black,
fontSize: 22,
fontWeight: FontWeight.normal)),
]),
),
Container(
decoration: BoxDecoration(
borderRadius: BorderRadius.circular(20), color: black),
child: FlatButton(
onPressed: () {
if (userProvider.userModel.totalCartPrice == 0) {
showDialog(
context: context,
builder: (BuildContext context) {
return Dialog(
shape: RoundedRectangleBorder(
borderRadius: BorderRadius.circular(20.0)),
//this right here
child: Container(
height: 200,
child: Padding(
padding: const EdgeInsets.all(12.0),
child: Column(
mainAxisAlignment:
MainAxisAlignment.center,
crossAxisAlignment:
CrossAxisAlignment.start,
children: [
Row(
mainAxisAlignment:
MainAxisAlignment.center,
children: <Widget>[
Text(
'Your cart is empty',
textAlign: TextAlign.center,
),
],
),
],
),
),
),
);
});
return;
}
showDialog(
context: context,
builder: (BuildContext context) {
return Dialog(
shape: RoundedRectangleBorder(
borderRadius: BorderRadius.circular(20.0)),
//this right here
child: Container(
height: 200,
child: Padding(
padding: const EdgeInsets.all(12.0),
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
crossAxisAlignment:
CrossAxisAlignment.start,
children: [
Text(
'You will be charged \$${userProvider.userModel.totalCartPrice / 100} upon delivery!',
textAlign: TextAlign.center,
),
SizedBox(
width: 320.0,
child: RaisedButton(
onPressed: () {
openCheckout();
// var uuid = Uuid();
// String id = uuid.v4();
// _orderServices.createOrder(
// userId: userProvider.user.uid,
// id: id,
// description:
// "Some random description",
// status: "complete",
// totalPrice: userProvider
// .userModel.totalCartPrice,
// cart: userProvider
// .userModel.cart);
// for (CartItemModel cartItem
// in userProvider
// .userModel.cart) {
// bool value = await userProvider
// .removeFromCart(
// cartItem: cartItem);
// if (value) {
// userProvider.reloadUserModel();
// print("Item added to cart");
// _key.currentState.showSnackBar(
// SnackBar(
// content: Text(
// "Removed from Cart!")));
// } else {
// print("ITEM WAS NOT REMOVED");
// }
// }
// _key.currentState.showSnackBar(
// SnackBar(
// content: Text(
// "Order created!")));
// Navigator.pop(context);
},
child: Text(
"Accept",
style:
TextStyle(color: Colors.white),
),
color: const Color(0xFF1BC0C5),
),
),
SizedBox(
width: 320.0,
child: RaisedButton(
onPressed: () {
Navigator.pop(context);
},
child: Text(
"Reject",
style: TextStyle(
color: Colors.white),
),
color: red),
)
],
),
),
),
);
});
},
child: CustomText(
text: "Check out",
size: 20,
color: white,
weight: FontWeight.normal,
)),
)
],
),
),
),
);
}
}
但是当我尝试这样做时，它会将空值传递给数量。请帮我解决这些问题。
【问题讨论】：
标签： firebase flutter google-cloud-firestore provider razorpay