flutter remove back button on appbar

I believe the solutions are the following

You actually either:

Don't want to display that ugly back button ( :] ), and thus go for : AppBar(...,automaticallyImplyLeading: false,...);

Don't want the user to go back - replacing current view - and thus go for: Navigator.pushReplacementNamed(## your routename here ##);

Don't want the user to go back - replacing a certain view back in the stack - and thus use: Navigator.pushNamedAndRemoveUntil(## your routename here ##, f(Route)→bool); where f is a function returning truewhen meeting the last view you want to keep in the stack (right before the new one);

Don't want the user to go back - EVER - emptying completely the navigator stack with: Navigator.pushNamedAndRemoveUntil(context, ## your routename here ##, (_) => false);

Cheers

A simple way to remove the back button in the AppBar is to set automaticallyImplyLeading to false.

appBar: AppBar(
  title: Text("App Bar without Back Button"),
  automaticallyImplyLeading: false,
),

You can remove the back button by passing an empty new Container() as the leading argument to your AppBar.

If you find yourself doing this, you probably don't want the user to be able to press the device's back button to get back to the earlier route. Instead of calling pushNamed, try calling Navigator.pushReplacementNamed to cause the earlier route to disappear.

The function pushReplacementNamed will remove the previous route in the backstack and replace it with the new route.

Full code sample for the latter is below.

import 'package:flutter/material.dart';

class LogoutPage extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return new Scaffold(
      appBar: new AppBar(
        title: new Text("Logout Page"),
      ),
      body: new Center(
        child: new Text('You have been logged out'),
      ),
    );
  }

}
class MyHomePage extends StatelessWidget {

  @override
  Widget build(BuildContext context) {
    return new Scaffold(
      appBar: new AppBar(
        title: new Text("Remove Back Button"),
      ),
      floatingActionButton: new FloatingActionButton(
        child: new Icon(Icons.fullscreen_exit),
        onPressed: () {
          Navigator.pushReplacementNamed(context, "/logout");
        },
      ),
    );
  }
}

void main() {
  runApp(new MyApp());
}

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return new MaterialApp(
      title: 'Flutter Demo',
      home: new MyHomePage(),
      routes: {
        "/logout": (_) => new LogoutPage(),
      },
    );
  }
}

automaticallyImplyLeading:

This checks whether we want to apply the back widget(leading widget) over the app bar or not. If the automaticallyImplyLeading is false then automatically space is given to the title and if If the leading widget is true, then this parameter has no effect.

void main() {
  runApp(
    new MaterialApp(
      home: new Scaffold(
        appBar: AppBar(
          automaticallyImplyLeading: false, // Used for removing back buttoon. 
          title: new Center(
            child: new Text("Demo App"),
          ),
        ),
        body: new Container(
          child: new Center(
            child: Text("Hello world!"),
          ),
        ),
      ),
    ),
  );
}  

Use this for slivers AppBar

SliverAppBar (
        automaticallyImplyLeading: false,
        elevation: 0,
        brightness: Brightness.light,
        backgroundColor: Colors.white,
        pinned: true,
      ),

Use this for normal Appbar

 appBar: AppBar(
    title: Text
    ("You decide on the appbar name"
    style: TextStyle(color: Colors.black,), 
    elevation: 0,
    brightness: Brightness.light,
    backgroundColor: Colors.white,
    automaticallyImplyLeading: false,

),

// if you want to hide back button use below code

class SecondScreen extends StatelessWidget {
@override
Widget build(BuildContext context) {
return Scaffold(
  appBar: AppBar(
    title: Text('Remove Back Button'),
    
    //hide back button
    automaticallyImplyLeading: false,
   ),
  body: Center(
    child: Container(),
  ),
);
}
}

// if you want to hide back button and stop the pop action use below code

class SecondScreen extends StatelessWidget {

@override
Widget build(BuildContext context) {
 return new WillPopScope(

  onWillPop: () async => false,
  child: Scaffold(
    appBar: AppBar(
      title: Text("Second Screen"),
      //For hide back button
      automaticallyImplyLeading: false,
    ),
    body: Center(
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          crossAxisAlignment: CrossAxisAlignment.center,
          children: <Widget>[
            RaisedButton(
              child: Text('Back'),
              onPressed: () {
                Navigator.pop(context);
              },
            ),
          ],
        )
    ),
  ),
);
 }

https://i.stack.imgur.com/9vK45.png

just use automaticallyImplyLeading in AppBar()

appBar: AppBaar(
  automaticallyImplyLeading: false,
)

The AppBar widget has a property called automaticallyImplyLeading. By default it's value is true. If you don't want flutter automatically build the back button for you then just make the property false.

appBar: AppBar(
  title: Text("YOUR_APPBAR_TITLE"), 
  automaticallyImplyLeading: false,
),

To add your custom back button

appBar: AppBar(
  title: Text("YOUR_APPBAR_TITLE"), 
  automaticallyImplyLeading: false,
  leading: YOUR_CUSTOM_WIDGET(),
),

If navigating to another page . Navigator.pushReplacement() can be used. It can be used If you're navigating from login to home screen. Or you can use .
AppBar(automaticallyImplyLeading: false)

SliverAppBar( automaticallyImplyLeading: false,}

Just Make it transparent, and no action while pressend

AppBar(
            leading: IconButton(
              icon: Icon(
                Icons.arrow_back,
                color: Colors.white.withOpacity(0),
              ),
              onPressed: () {},
            ),

  appBar: new AppBar(title: new Text("SmartDocs SPAY"),backgroundColor: Colors.blueAccent, automaticallyImplyLeading:false,
        leading: new Container(),
      ),

It is working Fine