How to center the title of an appbar

I had the same problem and it finally worked when I added the
mainAxisSize: MainAxisSize.min to my Row() widget:

 return new Scaffold(
      appBar: new AppBar(
        // Here we take the value from the MyHomePage object that
        // was created by the App.build method, and use it to set
        // our appbar title.
        title: Row(
          mainAxisAlignment: MainAxisAlignment.center,
          mainAxisSize: MainAxisSize.min,
          children: <Widget>[
            Text(
              widget.title,
            ),
          ],
        ),

        leading: new IconButton(
          icon: new Icon(Icons.accessibility),
          onPressed: () {},
        ),
        actions: [
          menuButton,
        ],
      ),
    );
  }

In my case I wanted to have a logo / image centered instead of a text. In this case, centerTitle is not enough (not sure why, I have an svg file, maybe that's the reason... ), so for example, this:

appBar: AppBar(centerTitle: true, title: AppImages.logoSvg)

will not really center the image (plus the image can be too big, etc.). What works well for me is a code like this:

appBar: AppBar(centerTitle: true,
    title: ConstrainedBox(
        constraints: BoxConstraints(maxHeight: 35, maxWidth: 200),
        child: AppImages.logoSvg)),

Here is how I make centerTitle on my appbar:

@override
Widget build(BuildContext context) {
return Scaffold(
  appBar: new AppBar(
    centerTitle: true ,
    title: new Text("Login"),
  ),
  body: new Container(
    padding: EdgeInsets.all(18.0),
      key: formkey,
        child: ListView(
        children: buildInputs() + buildSubmitButton(),
      ),
   ) 
);
}

You can just use the centerTitle property in the appBar section to center your title using:

centerTitle: true

Here is a different approach if you want to create a custom app bar title. For example you want an image and a text at the center of app bar then add

appBar: AppBar(
          title: Row(
            mainAxisAlignment: MainAxisAlignment.center,
            children: [
              Icon(
                Icons.your_app_icon,
                color: Colors.green[500],
              ),
              Container(
                  padding: const EdgeInsets.all(8.0), child: Text('YourAppTitle'))
            ],

          ),
  )

Here we have created a Row with MainAxisAlignment.center to center the children. Then we have added two children - An Icon and a Container with text. I wrapped Text widget in the Container to add the necessary padding.

You can center the title of an appBar by using centerTitle parameter.

centerTitle is Boolean Datatype, and default value is False.

centerTitle : true

Example :

import 'package:flutter/material.dart';

void main() {
  runApp(
    MaterialApp(
      home: Scaffold(
        appBar: AppBar(
          title: Text('App Title'),
          backgroundColor: Colors.red,
          centerTitle: true,
        ),
      ),
    ),
  );
}

Yeah but in my case i used centertitle as well as axis alignment then it made it centre , if i am using only onw of it then it is is not making it centre , here is how i am doing it :

import 'package:flutter/material.dart';
import 'package:infintywalls/widgets/widget.dart';

class Home extends StatefulWidget {
  @override
  _HomeState createState() => _HomeState();
}

class _HomeState extends State<Home> {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Row(
          mainAxisAlignment: MainAxisAlignment.center,
          mainAxisSize: MainAxisSize.min,
          children: <Widget>[
            appName(),
          ],
        ),
        elevation: 0.0,
        centerTitle: true,
      ),
    );
  }
}

and yeah btw appName() is my custom widget not a default builtin one.

home this is helpful to you thanks

appBar has its own bool condition for title center show or not,

so, if you set true,

  appBar: AppBar(
    title: Text(
      "header Text",
      style: TextStyle(color: Colors.black),
    ),
    centerTitle: true,
  ),

then it will be centre,other then its default left align (in android) ios set center(in default).

AppBar( centerTitle: true, // this is all you need ... )

After trying many solutions this helped me centerTitle: true adding sample code in addition to @Collin Jackson answer

Example in build(BuildContext context)

do this

appBar: AppBar(
        // Here we take the value from the MyHomePage object that was created by
        // the App.build method, and use it to set our appbar title.
        title: Text(widget.title),centerTitle: true
      ),

appbar:AppBar( centerTitle: true, title:Text("HELLO") )

@override
Widget build(BuildContext context) {
    return Scaffold(
        appBar: AppBar(
            title: Text('Title'),
            actions: <Widget> [
               IconButton(icon: const Icon(Icons.file_upload), onPressed: _pressed),
            ],
            leading: IconButton(icon: const Icon(Icons.list), onPressed: _pressed),
            centerTitle: true,
        )
        body: Text("Content"),
    );
}

Try the following code:

AppBar(
  centerTitle: true,
  ......
),

This can help in making Appbar Title Text in Center. You can choose to add your desired Styles using Style or comment it if not needed.

appBar: AppBar(
          title:  const Center(
            child: Text(
              "App Title",
              style: TextStyle( color: Colors.white,fontSize: 20),
            ),
          ),
        ),

On App Display:

It my case this code works:-

appBar: AppBar(

    centerTitle: true,

    elevation: 2,

    title: Center(

      child: Row(

        mainAxisAlignment: MainAxisAlignment.center,

        children: [

          Container(

            child: Text("  TINKLE"),

          )

        ],

      ),

    ),
    
  ),

Hope this was helpful.

Use Center object

    appBar: AppBar(
      title: Center(
        child: const Text('Title Centered')
      )
    )