Develop Reference

Google Pay button not showing on Real Device using the pay Plugin Flutter

I was trying to implement the pay plugin of Flutter. But the Google Pay button is not showing on a real device. It shows up in the Emulator.
This is the plugin I am using
pay: ^1.0.6
And this is my code for showing the payment buttons:
var _paymentItems = [
PaymentItem(
label: 'Total',
amount: '99.99',
status: PaymentItemStatus.final_price,
)
];
GooglePayButton(
paymentConfigurationAsset: 'gpay.json',
paymentItems: _paymentItems,
width: 200,
height: 50,
style: GooglePayButtonStyle.white,
type: GooglePayButtonType.pay,
margin: const EdgeInsets.only(top: 15.0),
onPaymentResult: onGooglePayResult,
loadingIndicator: const Center(
child: CircularProgressIndicator(),
),
)
Is there any restriction for using Google pay?
I am from Bangladesh and I tried running on different devices, it's showing on none.
I will highly appreciate any kind of help. Thanks in advance.

paying online with Google Pay is not available in Bangladesh.
https://support.google.com/pay/answer/9023773?hl=en#zippy=%2Cpay-online-or-in-apps

Close the application on back press

I am using flutter for development and I want to send app to background or close it when user clicks on back icon on appbar
I have used this answer for reference but apart from exit(0) is nothing working, which is not recommended in iOS.
I have tried following recommendations from other answers but none of it working on iOS.
Navigator.of(context).pop();
Navigator.of(context).maybePop();
Navigator.of(context, rootNavigator: true).pop(context);
Navigator.pushReplacementNamed(context, '/route');
SystemNavigator.pop();
Navigator.pop(context,true);
SystemChannels.platform.invokeMethod('SystemNavigator.pop');
for android following is working properly.
SystemNavigator.pop();
What should I use to close the app within apple guidelines.
EDIT
SystemNavigator.pop(); gives black screen in iOS.

Try this
appBar: AppBar(
leading: IconButton(
icon: Icon(Icons.arrow_back, color: Colors.black),
onPressed: () => Navigator.of(context).pop(),
),
title: Text("Sample"),
centerTitle: true,
),

Flutter show toast above keyboard on IOS

I'm using fluttertoast 7.0.4 package to show toasts in my App but on IOS that toast isn't showed when the key board is opened "it actually appears behind the keyboard" this is my code
Fluttertoast.showToast(
msg: message,
toastLength: Toast.LENGTH_SHORT,
gravity: ToastGravity.BOTTOM,
timeInSecForIosWeb: 1,
backgroundColor: AppColors.strongOrange,
textColor: Colors.white,
fontSize: 16.0
);
is there any way to change the z-index and making it bigger than keyboard's z-index in flutter

You cannot show Fluttertoast above the keyboard in ios.
There are two options:
1.Change the gravity of toast to center
Fluttertoast.showToast(
msg: message,
toastLength: Toast.LENGTH_SHORT,
gravity: ToastGravity.CENTER,
backgroundColor: Colors.red,
textColor: Colors.white,
fontSize: 16.0
);
Hide keyboard when showing toast at the bottom.
FocusManager.instance.primaryFocus.unfocus();

default call app for url launcher in flutter

I use url_launcher package in my app for making a call like this:
IconButton(
onPressed: () {
UrlLauncher.launch('tel://${user.phoneNumber}');
},
icon: Icon(
Icons.phone,
color: Color(0XFF01d57f),
),
)
everything works fine in the simulator, but on real app when I have another call apps like Skype, android ask for default app for calling; and if user select Skype by mistake and press "Always use this" every time Skype open for him instead of default call app how can i avoid those third party apps or just reset settings each time user enter the app ?
I also try flutter_phone_direct_caller package but same thing happened :
IconButton(
onPressed: () async {
//set the number here
bool res =
await FlutterPhoneDirectCaller.callNumber(
user.phoneNumber);
},
icon: Icon(
Icons.phone,
color: Color(0XFF01d57f),
),
)

Going Back is showing Black Screen in Flutter

I am trying to use Navigator.pop(context); in an appbar but the problem is that it shows a black screen and then you have to press the back button on android then it pops current black screen, so where is this black screen coming from that I don't know and in iPhone there is no back button so that why it is stuck in that screen. Please do help me
This is the code where I am using this Navigator code.
#override
Widget build(BuildContext context) {
return new Scaffold(
backgroundColor: Color.fromRGBO(30, 30, 30, 1.0),
appBar: new AppBar(
elevation: 0.0,
backgroundColor: Color.fromRGBO(30, 30, 30, 1.0),
actions: <Widget>[
new IconButton(
icon: Icon(Icons.settings_power),
onPressed: () {
Navigator.pop(context);
}),
],
title: new Text(
"PROLOG",
style: new TextStyle(color: Colors.white),
),
centerTitle: true,
),
);
}
and the most strange thing is that I am using this piece of code in another class its working fine. So where is the problem...

The reason why you're getting a black/blank screen after calling Navigator.pop(context) is because there's no widget/screen beyond the current Navigator stack.
In Flutter, SystemChannels.platform.invokeMethod('SystemNavigator.pop') is used to remove the topmost Flutter instance. As mentioned in the docs, the method should remove the current Activity from the stack in Android. The behavior is a bit different on iOS though.
If you're trying to implement this function to close the app, this is highly discouraged. This is pointed out on Apple's archived doc. I'm trying to search for an updated reference, but navigating through Apple's Developer docs is challenging.
Anyway, I've made some changes to your code snippet if you'd like to try this out.
Add this in your imports
import 'dart:io' show Platform, exit;
As for the code, exit(int) is used for iOS. It's recommended to use an exit code from the range 0...127 as mentioned in the docs. While SystemChannels.platform.invokeMethod('SystemNavigator.pop') is used for other platforms (mainly Android in this case).
Widget build(BuildContext context) {
return new Scaffold(
backgroundColor: Color.fromRGBO(30, 30, 30, 1.0),
appBar: new AppBar(
elevation: 0.0,
backgroundColor: Color.fromRGBO(30, 30, 30, 1.0),
actions: <Widget>[
new IconButton(
icon: Icon(Icons.settings_power),
// if Platform is iOS call exit(0)
// else call the preferred method
// https://api.flutter.dev/flutter/services/SystemNavigator/pop.html
onPressed: () => Platform.isIOS
? exit(0)
: SystemChannels.platform.invokeMethod('SystemNavigator.pop'),
),
],
title: new Text(
"PROLOG",
style: new TextStyle(color: Colors.white),
),
centerTitle: true,
),
);
}
Demo