Make AppBar transparent and show background image which is set to whole screen

DartFlutterFlutter Appbar

Dart Problem Overview

I have added AppBar in my flutter application. My screen already have a background image, where i don't want to set appBar color or don't want set separate background image to appBar.

I want show same screen background image to appBar also.

I already tried by setting appBar color as transparent but it shows color like gray.

Example code:

appBar: new AppBar(
        centerTitle: true,
//        backgroundColor: Color(0xFF0077ED),
        elevation: 0.0,
        title: new Text(
            "DASHBOARD",
            style: const TextStyle(
                color:  const Color(0xffffffff),
                fontWeight: FontWeight.w500,
                fontFamily: "Roboto",
                fontStyle:  FontStyle.normal,
                fontSize: 19.0
            )),
      )

enter image description here

Dart Solutions

Solution 1 - Dart

This is supported by Scaffold now (in stable - v1.12.13+hotfix.5).

  • Set Scaffold extendBodyBehindAppBar to true,
  • Set AppBar elevation to 0 to get rid of shadow,
  • Set AppBar backgroundColor transparency as needed.
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      extendBodyBehindAppBar: true,
      backgroundColor: Colors.red,
      appBar: AppBar(
//        backgroundColor: Colors.transparent,
        backgroundColor: Color(0x44000000),
        elevation: 0,
        title: Text("Title"),
      ),
      body: Center(child: Text("Content")),
    );
  }

Solution 2 - Dart

you can use Stack widget to do so. Follow below example.

import 'package:flutter/material.dart';

void main() => runApp(new MyApp());

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return new MaterialApp(
      home: new Home(),
    );
  }
}

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

class _HomeState extends State<Home> {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: Stack(
        children: <Widget>[
          Scaffold(
            backgroundColor: Colors.transparent,
            appBar: new AppBar(
              title: new Text(
                "Hello World",
                style: TextStyle(color: Colors.amber),
              ),
              backgroundColor: Colors.transparent,
              elevation: 0.0,
            ),
            body: new Container(
              color: Colors.red,
            ),
          ),
        ],
      ),
    );
  }
}

Solution 3 - Dart

You can use Scaffold's property "extendBodyBehindAppBar: true" Don't forget to wrap child with SafeArea

  @Override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text(
          widget.title,
          style: TextStyle(color: Colors.black),
        ),
        backgroundColor: Colors.transparent,
        elevation: 0.0,
      ),
      extendBodyBehindAppBar: true,
      body: Container(
        width: double.infinity,
        height: double.infinity,
        decoration: BoxDecoration(
          image: DecorationImage(
            image: AssetImage('assets/background/home.png'),
            fit: BoxFit.cover,
          ),
        ),
        child: SafeArea(
            child: Center(
          child: Container(
            width: 300,
            height: 300,
            decoration: BoxDecoration(
              color: Colors.green,
            ),
            child: Center(child: Text('Test')),
          ),
        )),
      ),
    );
  }

enter image description here

Solution 4 - Dart

None of these seem to work for me, mine went something like this:

return Scaffold(
  extendBodyBehindAppBar: true,
  appBar: AppBar(
    backgroundColor: Colors.transparent,
    iconTheme: IconThemeData(color: Colors.white),
    elevation: 0.0,
  ),
  body: Stack(
    children: <Widget>[
      Container(
        decoration: BoxDecoration(
          image: DecorationImage(
            image: NetworkImage(
                'https://images.unsplash.com/photo-1517030330234-94c4fb948ebc?ixlib=rb-1.2.1&ixid=eyJhcHBfaWQiOjEyMDd9&auto=format&fit=crop&w=1275&q=80'),
            fit: BoxFit.cover,
          ),
        ),
        child: Padding(
          padding: const EdgeInsets.fromLTRB(0, 100, 0, 0),
          child:
          // Column of widgets here...
        ),
       ),
     ],
   ),
 );

Solution 5 - Dart

Output:

enter image description here

A lot of answers but nobody explains why extendBodyBehindAppBar works? It works because when we assigned extendBodyBehindAppBar as true, then the body of the widget takes the height of AppBar, and we see an image covering the AppBar area.

Simple Example:

Size size = MediaQuery.of(context).size;
    return Scaffold(
      extendBodyBehindAppBar: true,
      body: Container(
        // height: size.height * 0.3,
        child: Image.asset(
          'shopping_assets/images/Fruits/pineapple.png',
          fit: BoxFit.cover,
          height: size.height * 0.4,
          width: size.width,
        ),
      ),
    );

Solution 6 - Dart

that's what I did and it's working

This is supported by Scaffold now (in stable - v1.12.13+hotfix.5).

Set Scaffold extendBodyBehindAppBar to true, Set AppBar elevation to 0 to get rid of shadow, Set AppBar backgroundColor transparency as needed.

Best regards

Solution 7 - Dart

Scaffold(extendBodyBehindAppBar: true);

Solution 8 - Dart

There could be many cases, for example, do you want to keep the AppBar or not, whether or not you want to make the status bar visible, for that, you can wrap Scaffold.body in SafeArea and if you want AppBar to not have any shadow (unlike the red I provided in example 2), you can set its color to Colors.transparent:

  • Full image (without AppBar)

    enter image description here

    Scaffold(
  extendBodyBehindAppBar: true,
  body: SizedBox.expand(
    child: Image.network(
      'https://wallpaperaccess.com/full/3770388.jpg',
      fit: BoxFit.cover,
    ),
  ),
)
  • Full image (with AppBar)

    enter image description here

    Scaffold(
  extendBodyBehindAppBar: true,
  appBar: AppBar(
    backgroundColor: Colors.transparent,
    shadowColor: Colors.red,
    title: Text('MyApp'),
  ),
  body: SizedBox.expand(
    child: Image.network(
      'https://wallpaperaccess.com/full/3770388.jpg',
      fit: BoxFit.cover,
    ),
  ),
)

Solution 9 - Dart

In my case I did it as follows:

Additional create an app bar with a custom back button (in this case with a FloatingActionButton). You can still add widgets inside the Stack.

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

class _HomeState extends State< Home > {

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: Stack(
        children: <Widget>[
          this._backgroundImage(), // --> Background Image
          Positioned( // --> App Bar
            child: AppBar(
              backgroundColor: Colors.transparent,
              elevation: 0.0,
              leading: Padding( // --> Custom Back Button
                padding: const EdgeInsets.all(8.0),
                child: FloatingActionButton(
                  backgroundColor: Colors.white,
                  mini: true,
                  onPressed: this._onBackPressed,
                  child: Icon(Icons.arrow_back, color: Colors.black),
                ),
              ),
            ),
          ),
          // ------ Other Widgets ------
        ],
      ),
    );
  }

  Widget _backgroundImage() {
    return Container(
      height: 272.0,
      width: MediaQuery.of(context).size.width,
      child: FadeInImage(
        fit: BoxFit.cover,
        image: NetworkImage(
            'https://images.unsplash.com/photo-1527555197883-98e27ca0c1ea?ixlib=rb-1.2.1&ixid=eyJhcHBfaWQiOjEyMDd9&w=1000&q=80'),
        placeholder: AssetImage('assetName'),
      ),
    );
  }

  void _onBackPressed() {
    Navigator.of(context).pop();
  }
}

In the following link you can find more information Link

Solution 10 - Dart

You can Try this This code work for me

@override
  Widget build(BuildContext context) {
    _buildContext = context;
    sw = MediaQuery.of(context).size.width;
    sh = MediaQuery.of(context).size.height;

    return new Container(
      child: new Stack(
        children: <Widget>[
          new Container(
            child: Stack(
              children: <Widget>[
                Container(
                  padding: EdgeInsets.all(20.0),
                  decoration: BoxDecoration(image: backgroundImage),
                ),
              ],
            ),
          ),
          new Scaffold(
            backgroundColor: Colors.transparent,
            appBar: new AppBar(
              title: new Text(Strings.page_register),
              backgroundColor: Colors.transparent,
              elevation: 0.0,
              centerTitle: true,
            ),
            body: SingleChildScrollView(
              padding: EdgeInsets.all(20.0),
              physics: BouncingScrollPhysics(),
              scrollDirection: Axis.vertical,
              child: new Form(
                key: _formKey,
                autovalidate: _autoValidate,
                child: FormUI(),
              ),
            ),
          )
        ],
      ),
    );
  }

backgroundImage

DecorationImage backgroundImage = new DecorationImage(
  image: new ExactAssetImage('assets/images/welcome_background.png'),
  fit: BoxFit.cover,
);

Solution 11 - Dart

use stack

  • set background image
    • Another Scaffold()

      • set background color transperant

      • set custom appbar

      • use column with singleChildScrollView or ListView

enter image description here

@override   Widget build(BuildContext context) {
        return Scaffold(
          body: Stack(
            children: <Widget>[
              backgroundBGContainer(),
              Scaffold(
                backgroundColor: Colors.transparent,
                appBar: appBarWidgetCustomTitle(context: context, titleParam: ""),
                body: SingleChildScrollView(
                  child: Column(
                    children: <Widget>[
                      _spaceWdgt(),
                      Center(
                        child: Stack(
                          children: <Widget>[
                            new Image.asset(
                              "assets/images/user_icon.png",
                              width: 117,
                              height: 97,
                            ),
                          ],
                        ),
                      ),




  Widget backgroundBGContainer() {
      return Container(
        decoration: new BoxDecoration(
            image: new DecorationImage(
              image: new AssetImage("assets/images/ground_bg_image.png"),
              fit: BoxFit.cover,
            ),
            color: MyColor().groundBackColor),
      );
    }
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QuestionRahul MahadikView Question on Stackoverflow
Solution 1 - DartgswierczynskiView Answer on Stackoverflow
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