问题描述
在我的应用程序的一个页面中,我正在调用 startTransaction() 插件方法,并将响应存储在 paytm 文档中。在收到响应时,我想将成功或失败的状态返回到上一页。所以在 init() 函数中,我调用另一个异步方法来 startTransaction 并检查响应。
PlatformException (0,UnkNown error,{response : { response of transaction})
class StartTransaction extends StatefulWidget {
int orderId;
double totalAmount;
PaymentPayload paymentPayload;
bool success;
StartTransaction({this.orderId,this.totalAmount});
@override
_StartTransactionState createState() => _StartTransactionState();
}
class _StartTransactionState extends State<StartTransaction> {
@override
void initState() {
super.initState();
initiateTransaction();
}
Future initiateTransaction() async {
if(widget.success == null){
widget.paymentPayload = await createPaymentGateway(
widget.orderId,userBloc.userData.username,widget.totalAmount.toStringAsFixed(2),context);
var pgResp = AllInOnesdk.startTransaction(
widget.paymentPayload.mid,widget.orderId.toString(),widget.paymentPayload.txnToken,widget.paymentPayload.callbackUrl,true,false);
pgResp.then((value) {
print(value);
setState(() {
widget.success = value['RESPCODE'] == 01;
});
}).catchError((onError) {
setState(() {
widget.success = false;
});
});
}
}
@override
Widget build(BuildContext context) {
return Scaffold(
body: SafeArea(
child: FutureBuilder(
builder: (context,snapshot) {
if(widget.success == true) {
print('Payment successful');
Navigator.pop(context,true);
} else if(widget.success == false) {
print('Payment unsuccessful');
Navigator.pop(context,false);
}
return Center(
child: Column(
mainAxisAlignment: MainAxisAlignment.center,crossAxisAlignment: CrossAxisAlignment.center,children: [
Text('We are processing your transaction',style: TextStyle(fontSize: 36),),CircularProgressIndicator(),],);
}
),);
}
}```
解决方法
您需要根据交易中使用的订单ID和MID调用交易状态API。不需要再次调用starttransaction方法