If you want the whole table to be `Centered`, use the **`mainAxisAlignment`** property of **`Column`**.

**Column**

    mainAxisAlignment: MainAxisAlignment.center //Center Column contents vertically,
    crossAxisAlignment: CrossAxisAlignment.center //Center Column contents horizontally,

**Row**

    mainAxisAlignment: MainAxisAlignment.center //Center Row contents horizontally,
    crossAxisAlignment: CrossAxisAlignment.center //Center Row contents vertically,

If you want it to be like in the picture, use

    mainAxisAlignment: MainAxisAlignment.spaceEvenly

You can use `Spacer` if you want fine grain control. 

    Column(
      children: &lt;Widget&gt;[
        Spacer(), // 1st spacer
        Widget1(),
        Widget2(),
        Spacer(), // 2nd spacer
      ],
    )


----------

You can change `flex` too using `Spacer(flex:2)`

**use like this**

- &gt; In Colum 

      child: Column(
                  mainAxisAlignment: MainAxisAlignment.center,
                  crossAxisAlignment: CrossAxisAlignment.center,
                  children: [...
                             .
                             ] 
- &gt; In Row

       child: Row(
          mainAxisAlignment: MainAxisAlignment.center,
          crossAxisAlignment: CrossAxisAlignment.center,
          children: [...
                             .
                             ] 

In the example from [react native mapview][1] they have latitudeDelta and longitudeDelta. Is it equal to the height and width? And in what unit? Accoring to their [github comment ][2], it says 

&gt; Distance between the minimum and the maximum latitude/longitude to be displayed.

But that doesn&#39;t help me out. I want to know what the user see on the map.


  [1]: https://github.com/react-community/react-native-maps/blob/master/README.md#mapview
  [2]: https://github.com/facebook/react-native/blob/0.28-stable/Libraries/Components/MapView/MapView.js#L140

React native MapView: what is latitudeDelta longitudeDelta

I moved my project from desk to another.   
When I run `php artisan` it does not work.  

I tried to run `composer update`, but it returns the error 

&gt; Script @php artisan package:discover handling the post-autoload-dump event returned with error code 255

Script @php artisan package:discover handling the post-autoload-dump event returned with error code 255

I have a small currency table. I didn&#39;t use grid. I used Column and rows. Problem is that items in rows is not showing in center as shown below in the Excel example.
What widget do I have to use to make the items centered? 

[![enter image description here][1]][1]





The Example codes:

    return new Center(
      child: new Column(
        crossAxisAlignment: CrossAxisAlignment.center,
        children: &lt;Widget&gt;[
          new Row(
            mainAxisAlignment: MainAxisAlignment.center,
            children: &lt;Widget&gt;[
              new Padding(
                padding: const EdgeInsets.fromLTRB(15.0, 5.0, 15.0, 5.0),
                child: new Icon(
                  Icons.crop_rotate,
                  color: Colors.white,
                ),
              ),
              new Padding(
                padding: const EdgeInsets.fromLTRB(15.0, 5.0, 15.0, 5.0),
                child: new Text(&quot;STG&quot;, style: mainHeadTextStyle),
              ),
              new Padding(
                padding: const EdgeInsets.fromLTRB(15.0, 5.0, 15.0, 5.0),
                child: new Text(&quot;EUR&quot;, style: mainHeadTextStyle),
              ),
              new Padding(
                padding: const EdgeInsets.fromLTRB(15.0, 5.0, 15.0, 5.0),
                child: new Text(&quot;USD&quot;, style: mainHeadTextStyle),
              ),
            ],
          ),
          new Row(
            mainAxisAlignment: MainAxisAlignment.center,
            children: &lt;Widget&gt;[
    ....
    ....
    ....


  [1]: https://i.stack.imgur.com/HzbtU.png

How to center column and row item in Flutter?

I have a small currency table. I didn't use grid. I used Column and rows. Problem is that items in rows is not showing in center as shown below in the Excel example.
What widget do I have to use to make the items centered?
<a href="https://i.stack.imgur.com/HzbtU.png" target="_blank" rel="noopener noreferrer"><img src="https://i.stack.imgur.com/HzbtU.png" alt="enter image description here"></a>
The Example codes:
<pre><code class="hljs language-less">return new Center(
 child: new Column(
 crossAxisAlignment: CrossAxisAlignment.center,
 children: &#x3C;Widget>[
 new Row(
 mainAxisAlignment: MainAxisAlignment.center,
 children: &#x3C;Widget>[
 new Padding(
 padding: const EdgeInsets.fromLTRB(15.0, 5.0, 15.0, 5.0),
 child: new Icon(
 Icons.crop_rotate,
 color: Colors.white,
 ),
 ),
 new Padding(
 padding: const EdgeInsets.fromLTRB(15.0, 5.0, 15.0, 5.0),
 child: new Text("STG", style: mainHeadTextStyle),
 ),
 new Padding(
 padding: const EdgeInsets.fromLTRB(15.0, 5.0, 15.0, 5.0),
 child: new Text("EUR", style: mainHeadTextStyle),
 ),
 new Padding(
 padding: const EdgeInsets.fromLTRB(15.0, 5.0, 15.0, 5.0),
 child: new Text("USD", style: mainHeadTextStyle),
 ),
 ],
 ),
 new Row(
 mainAxisAlignment: MainAxisAlignment.center,
 children: &#x3C;Widget>[
....
....
....
</code></pre>

I am developing Flutter app for the first time.. I have an issue in adding a image. I have a below questions :

 1. Where to create images folder?
 2. Where to add assets tag in pubspec.ymal?
 3. Is there any assets folder needed for this?

**What I tried :**


     assets:
        - images/lake.jpg

inside pubspec.ymal :

Full file :

    name: my_flutter_app
    description: A new Flutter application.
    
    dependencies:
      flutter:
        sdk: flutter
    
      cupertino_icons: ^0.1.2
    
    dev_dependencies:
      flutter_test:
        sdk: flutter
    
    flutter:
      uses-material-design: true,
      assets:
        - images/lake.jpg

**Error log :**

    #/properties/flutter/properties/uses-material-design: type: wanted [boolean] got true,
    Error detected in pubspec.yaml:
    Error building assets
    
    FAILURE: Build failed with an exception.
    
    * Where:
    Script &#39;/home/abc/Downloads/flutter/packages/flutter_tools/gradle/flutter.gradle&#39; line: 435
    
    * What went wrong:
    Execution failed for task &#39;:app:flutterBuildDebug&#39;.
    &gt; Process &#39;command &#39;/home/abc/Downloads/flutter/bin/flutter&#39;&#39; finished with non-zero exit value 1
    
    * Try:
    Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output.
    
    * Get more help at https://help.gradle.org
    
    BUILD FAILED in 1s
    Finished with error: Gradle build failed: 1


**My main.dart code :**

    // Copyright 2017 The Chromium Authors. All rights reserved.
    // Use of this source code is governed by a BSD-style license that can be
    // found in the LICENSE file.
    
    import &#39;package:flutter/material.dart&#39;;
    // Uncomment lines 7 and 10 to view the visual layout at runtime.
    //import &#39;package:flutter/rendering.dart&#39; show debugPaintSizeEnabled;
    
    void main() {
      //debugPaintSizeEnabled = true;
      runApp(new MyApp());
    }
    
    class MyApp extends StatelessWidget {
      @override
      Widget build(BuildContext context) {
        Widget titleSection = new Container(
          padding: const EdgeInsets.all(32.0),
          child: new Row(
            children: [
              new Expanded(
                child: new Column(
                  crossAxisAlignment: CrossAxisAlignment.start,
                  children: [
                    new Container(
                      padding: const EdgeInsets.only(bottom: 8.0),
                      child: new Text(
                        &#39;Oeschinen Lake Campground&#39;,
                        style: new TextStyle(
                          fontWeight: FontWeight.bold,
                        ),
                      ),
                    ),
                    new Text(
                      &#39;Kandersteg, Switzerland&#39;,
                      style: new TextStyle(
                        color: Colors.grey[500],
                      ),
                    ),
                  ],
                ),
              ),
              new Icon(
                Icons.star,
                color: Colors.red[500],
              ),
              new Text(&#39;41&#39;),
            ],
          ),
        );
    
        Column buildButtonColumn(IconData icon, String label) {
          Color color = Theme.of(context).primaryColor;
    
          return new Column(
            mainAxisSize: MainAxisSize.min,
            mainAxisAlignment: MainAxisAlignment.center,
            children: [
              new Icon(icon, color: color),
              new Container(
                margin: const EdgeInsets.only(top: 8.0),
                child: new Text(
                  label,
                  style: new TextStyle(
                    fontSize: 12.0,
                    fontWeight: FontWeight.w400,
                    color: color,
                  ),
                ),
              ),
            ],
          );
        }
    
        Widget buttonSection = new Container(
          child: new Row(
            mainAxisAlignment: MainAxisAlignment.spaceEvenly,
            children: [
              buildButtonColumn(Icons.call, &#39;CALL&#39;),
              buildButtonColumn(Icons.near_me, &#39;ROUTE&#39;),
              buildButtonColumn(Icons.share, &#39;SHARE&#39;),
            ],
          ),
        );
    
        Widget textSection = new Container(
          padding: const EdgeInsets.all(32.0),
          child: new Text(
            &#39;&#39;&#39;
    Lake Oeschinen lies at the foot of the Bl&#252;emlisalp in the Bernese Alps. Situated 1,578 meters above sea level, it is one of the larger Alpine Lakes. A gondola ride from Kandersteg, followed by a half-hour walk through pastures and pine forest, leads you to the lake, which warms to 20 degrees Celsius in the summer. Activities enjoyed here include rowing, and riding the summer toboggan run.
            &#39;&#39;&#39;,
            softWrap: true,
          ),
        );
    
        return new MaterialApp(
          title: &#39;Flutter Demo&#39;,
          home: new Scaffold(
            appBar: new AppBar(
              title: new Text(&#39;Top Lakes&#39;),
            ),
            body: new ListView(
              children: [
                new Image.asset(
                  &#39;images/lake.jpg&#39;,
                  width: 600.0,
                  height: 240.0,
                  fit: BoxFit.cover,
                ),
                titleSection,
                buttonSection,
                textSection,
              ],
            ),
          ),
        );
      }
    }

I am referring this tutorial **https://flutter.io/tutorials/layout/**

Also I want ask that is there any tools for clean rebuild in flutter as i can&#39;t find any options for this..

Any help would be appreciated.

Thank you !


How to add image in Flutter

I am trying to create an alert dialog with rounded corners in Flutter same as below screenshot. also add my code here, but my output is exactly different from the expected one. anyone, please help me.

###Expected Alert Dialog

![Expected Alert Dialog][1]


my code is here.

&lt;!-- language: dart --&gt;

    void _showAlert() {
    AlertDialog dialog = new AlertDialog(
      content: new Container(
        width: 260.0,
        height: 230.0,
        decoration: new BoxDecoration(
          shape: BoxShape.rectangle,
          color: const Color(0xFFFFFF),
          borderRadius: new BorderRadius.all(new Radius.circular(32.0)),
        ),
        child: new Column(
          crossAxisAlignment: CrossAxisAlignment.stretch,
          children: &lt;Widget&gt;[
            // dialog top
            new Expanded(
              child: new Row(
                children: &lt;Widget&gt;[
                  new Container(
                    // padding: new EdgeInsets.all(10.0),
                    decoration: new BoxDecoration(
                      color: Colors.white,
                    ),
                    child: new Text(
                      &#39;Rate&#39;,
                      style: TextStyle(
                        color: Colors.black,
                        fontSize: 18.0,
                        fontFamily: &#39;helvetica_neue_light&#39;,
                      ),
                      textAlign: TextAlign.center,
                    ),
                  ),
                ],
              ),
            ),

            // dialog centre
            new Expanded(
              child: new Container(
                  child: new TextField(
                decoration: new InputDecoration(
                  border: InputBorder.none,
                  filled: false,
                  contentPadding: new EdgeInsets.only(
                      left: 10.0, top: 10.0, bottom: 10.0, right: 10.0),
                  hintText: &#39; add review&#39;,
                  hintStyle: new TextStyle(
                    color: Colors.grey.shade500,
                    fontSize: 12.0,
                    fontFamily: &#39;helvetica_neue_light&#39;,
                  ),
                ),
              )),
              flex: 2,
            ),

            // dialog bottom
            new Expanded(
              child: new Container(
                padding: new EdgeInsets.all(16.0),
                decoration: new BoxDecoration(
                  color: const Color(0xFF33b17c),
                ),
                child: new Text(
                  &#39;Rate product&#39;,
                  style: TextStyle(
                    color: Colors.white,
                    fontSize: 18.0,
                    fontFamily: &#39;helvetica_neue_light&#39;,
                  ),
                  textAlign: TextAlign.center,
                ),
              ),
            ),
          ],
        ),
      ),
    );

    showDialog(context: context, child: dialog);
    }
    }


###The output I get from the above code is.

![screenshot][2]

  [1]: https://i.stack.imgur.com/rNJVW.png
  [2]: https://i.stack.imgur.com/Rmz7j.png

Alert Dialog with Rounded corners in flutter

I&#39;m still having a bit of trouble with the layouting in Flutter.    
Right now I want to have the available space shared between 3 widgets, in a quadrant layout.
The width is evenly shared (this works fine via 2 `Expanded` widgets in a Row), but now I also want the height to adjust automatically so `widget3.height == widget1.height + widget2.height`.
[![layout][1]][1]
If the content of `widget3` is larger, I want `widget1` and `widget2` to adjust their height and vice versa.


Is this even possible in Flutter?


  [1]: https://i.stack.imgur.com/jEtVl.jpg

Flutter Layout Row / Column - share width, expand height

I am using Flutter to make a list of information about movies. Now I want the cover image on the left to be a rounded corners picture. I did the following, but it didn’t work. Thanks!

        getItem(var subject) {
        var row = Container(
          margin: EdgeInsets.all(8.0),
          child: Row(
            children: &lt;Widget&gt;[
              Container(
                width: 100.0,
                height: 150.0,
                decoration: BoxDecoration(
                  borderRadius: BorderRadius.all(Radius.circular(8.0)),
                  color: Colors.redAccent,
                ),
                child: Image.network(
                  subject[&#39;images&#39;][&#39;large&#39;],
                  height: 150.0,
                  width: 100.0,
                ),
              ),
            ],
          ),
        );
        return Card(
          color: Colors.blueGrey,
          child: row,
        );
      }

as follows

[![enter image description here][1]][1]


  [1]: https://i.stack.imgur.com/KTdOv.png

How to do Rounded Corners Image in Flutter

I want to create a list of cards scrolling horizontally with snap to fit effect when swiped either from left or right.

Each card has some spacing between them and fit to screen similar to below image

[![enter image description here][1]][1]


Apart from that these horizontally scrollable list elements should be contained inside a vertically scrollable list.



  [1]: https://i.stack.imgur.com/DdPZU.gif

I all I am able to achieve is only displaying a list of horizontal scrolling  cards after following example in flutter docs.

    class SnapCarousel extends StatelessWidget {
      @override
      Widget build(BuildContext context) {
        final title = &#39;Horizontal List&#39;;
    
        return MaterialApp(
          title: title,
          home: Scaffold(
            appBar: AppBar(
              title: Text(title),
            ),
            body: Container(
              margin: EdgeInsets.symmetric(vertical: 20.0),
              height: 200.0,
              child: ListView(
                scrollDirection: Axis.horizontal,
                children: &lt;Widget&gt;[
                  Container(
                    width: 160.0,
                    color: Colors.red,
                  ),
                  Container(
                    width: 160.0,
                    color: Colors.blue,
                  ),
                  Container(
                    width: 160.0,
                    color: Colors.green,
                  ),
                  Container(
                    width: 160.0,
                    color: Colors.yellow,
                  ),
                  Container(
                    width: 160.0,
                    color: Colors.orange,
                  ),
                ],
              ),
            ),
          ),
        );
      }
    }

Content Type	Original Author	Original Content on Stackoverflow
Question	user9239214	View Question on Stackoverflow
Solution 1 - Grid	Vinoth Kumar	View Answer on Stackoverflow
Solution 2 - Grid	Alexander Simonov	View Answer on Stackoverflow
Solution 3 - Grid	CopsOnRoad	View Answer on Stackoverflow
Solution 4 - Grid	Sandeep Pareek	View Answer on Stackoverflow

How to center column and row item in Flutter?

Grid Problem Overview

Grid Solutions

Solution 1 - Grid

Solution 2 - Grid

Solution 3 - Grid

Solution 4 - Grid

Script @php artisan package:discover handling the post-autoload-dump event returned with error code 255

React native MapView: what is latitudeDelta longitudeDelta

Attributions