Flutter: Changing the current tab in tab bar view using a button

Question

I am creating an app that contains a tab bar on its homepage. I want to be able to navigate to one of the tabs using my FloatingActio

Answer 1

You can use TabController:

TabController _controller = TabController(
  vsync: this,
  length: 3,
  initialIndex: 0,
);

_controller.animateTo(_currentTabIndex);

return Scaffold(
  appBar: AppBar(
    bottom: TabBar(
      controller: _controller,
      tabs: [
        ...
      ],
    ),
  ),
  body: TabBarView(
    controller: _controller,
    children: [
      ...
    ],
  ),
);

And than, setState to update screen:

int _currentTabIndex = 0;

setState(() {
  _currentTabIndex = 1;
});