How to handle the code after showDialog is dismissed in Flutter?

By using the then function we can handle the code after dialog dismiss

 isShow=false;
if( isShow==fasle){
showDialog(
  context: context,
  builder: (BuildContext context) {
    // return object of type Dialog
    return AlertDialog(
      title: new Text("Alert Dialog title"),
      content: new Text("Alert Dialog body"),
      actions: <Widget>[
        // usually buttons at the bottom of the dialog
        new FlatButton(
          child: new Text("Close"),
          onPressed: () {
            isShow = false;
            Navigator.of(context).pop();
          },
        ),
      ],
    );
  },
)
}

In the above code when "isShow" value is false then i am going to show the Dialog and while showing the dialog set variable "isShow" to true

After dismiss the dialog again set the value to fasle, so that ican show the dialog alternatively, but when i press the back button this will not set the "isShow" to fasle, for the next iteration it will not show the Dialog.

To handle this scenario i have added then() function for the showDialog.

Let's updated code is

isShow=false;
if( isShow==fasle){
showDialog(
context: context,
builder: (BuildContext context) {
// return object of type Dialog
return AlertDialog(
title: new Text("Alert Dialog title"),
content: new Text("Alert Dialog body"),
actions: <Widget>[
// usually buttons at the bottom of the dialog
new FlatButton(
child: new Text("Close"),
onPressed: () {
isShow = false;
Navigator.of(context).pop();
},
),
],
);
},
)

.then((value){

  isShow = false;
});

By this way we can hanlde back button event also.

How do I supply/set an initial value to a text field in Flutter ?

How to place a listview inside a SingleChildScrollView but prevent them from scrolling separately?

What corresponds to Intent in Flutter?

How to create Gradient background for AppBar in Flutter

How to make a widget Center vertically inside a SingleChildScrollView

How to make shadow for Container widget Flutter?

How does Flutter load images?

How to change package name in flutter?

How to fix Flutter: error:MissingPluginException(No implementation found for method)

Flutter - Vertical Divider - How to add Vertical Divider?

How to set the TextFormField/TextField border color

Cannot run with sound null safety because dependencies don't support null safety, I have receive

How to copy text from Text Widget flutter?

How to deactivate back button in flutter?

How do i make TextButton full width in flutter?

How to Close Flutter application Programmatically?

How to remove debug banner in flutter?

Error : MediaQuery.of() called with a context that does not contain a MediaQuery No MediaQuery ances

What is Flutter?

How to change the application launcher icon on Flutter?

How do i change the OutlineInputBorder color?

Flutter Questions and Answers

How do we save the data in browser's cookies using the Flutter web?

Vertical Divider is Not Showing in my Flutter Application

How do I open a web browser (URL) from my Flutter code?

Can we use Container color and decoration properties at once?

How to navigate to new screen without back screen

Navigator operation requested with a context that does not include a Navigator.

How can i get document id in Flutter Firestore?

How to check the given value is a number or not in dart?

How to display snackbar infinite duration in a flutter application

How to handle Scaffold.of() called with a context that does not contain a Scaffold exception?

How to remove Yellow lines under Text Widgets in Flutter?

How do i make circular icon Inside Button ?

How to create Toast in Flutter?

How to fix Flutter Bottom OverFlowed error A RenderFlex overflowed by XX pixels on the bott