Is it possible to control tabs(Hide/Visible) in Flutter programmatically [closed] - flutter

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I have two tabs each with some data to be filled by the user. In Tab-1 (Personal Data) I have a form with some widgets where the user has to enter his personal details.
After filling all the details in the Tab-1 (form-1) only the Tab-2 (Medical History) should be navigated and visible. How to achieve this in Flutter?

Answer 1

We can achieve this by maintaining the count of tab bar items to be displayed.
Basically we have to create two List<Widget> which will depend on tab bar count to be displayed.
Example:
class MyApp extends StatefulWidget {
#override
_MyAppState createState() => _MyAppState();
}
class _MyAppState extends State<MyApp> {
int _tabBarCount = 1;
List<Widget> getTabBarList() { // Tab Bar items displayed on the App Bar
switch (_tabBarCount) {
case 1:
return [Tab(icon: Icon(Icons.search))];
case 2:
return [
Tab(icon: Icon(Icons.search)),
Tab(icon: Icon(Icons.file_download))
];
default:
return [];
}
}
List<Widget> getTabScreen() { // Screens to be displayed on Tab Bar
switch (_tabBarCount) {
case 1:
return [
RaisedButton(onPressed: () {
setState(() {
_tabBarCount = 2; // Click event, here tab bar count should increse, so that multiple tab bar can be visible.
});
}, child: Text('Save'),)
];
case 2:
return [
Text('First Screen'),
Text('Second Screen')
];
default:
return [];
}
}
Widget build(BuildContext context) {
return MaterialApp(
home: DefaultTabController(
length: _tabBarCount,
child: Scaffold(
backgroundColor: Colors.white,
appBar: AppBar(
bottom: TabBar(
tabs: getTabBarList(),
),
title: Text('Tabs Demo'),
),
body: TabBarView(
children: getTabScreen(),
),
),
),
);
}
}