開発スタッフがアプリ関連の最新技術やニュースをご紹介します。

For this week, I will create only user interface design for android app using flutter. In this article I will explain deeply the usage of widget and we can learn a lot of flutter widget and how to clearly create folder structures etc.

Firstly I create images asset folders from the app directory named with assets. Like this :

project_name/assets/images/your_image.jpg

After inserting images in assets folder, we will need to apply this image to our app. So we have to put images assets in pubspec.yaml file.

Let’s starting coding in main.dart file. In our widget, we call Profile page named with profile_page.dart. You can also use other file name.

  Widget build(BuildContext context) {
    return MaterialApp(
        title: 'Flutter Demo',
        debugShowCheckedModeBanner: false,
        theme: ThemeData(
            primarySwatch: Colors.blue,

        ),
        home: ProfilePage()
    );
  }

In our ProfilePage for appbar, inside the scaffold widget I create Row widget with leading and trailing, leading is that will display back button and trailing is that will display SELECT text in right side of the screen of the one row.

        child: Row(
          children: <Widget>[
            leading : GestureDetector(
          onTap: () {
            Navigator.of(context).pop();
          },
          child: Icon(Icons.arrow_back),
        ),
            Spacer(),
            trailing : Text(
          "SELECT",
          style: actionMenuStyle,
        ),
          ],
        ),

And for display Super Liked Me text and other design, I create one Column widget inside the body. For display Super Liked Me text, We can use Text Widget inside a Padding widget.

         Padding(
            padding: const EdgeInsets.all(16),
            child: Text(
              "Super Liked Me",
              style: headingTextStyle.copyWith(color: Colors.black),
            ),
          )

The next design for beautiful Search box, we can use TextField widget inside a Card Widget. If you do rounded search bar, we can use inside RoundedRectangleBorder widget with properties BorerRadius.circular(30) widget.

          Card(
            elevation: 4,
            shape: RoundedRectangleBorder(
              borderRadius: BorderRadius.circular(16),
            ),
            margin: const EdgeInsets.symmetric(horizontal: 16, vertical: 8),
            child: Padding(
              padding: const EdgeInsets.symmetric(horizontal: 8),
              child: TextField(
                decoration: InputDecoration(
                    border: InputBorder.none,
                    prefixIcon: Icon(Icons.search),
                    hintText: "Search",
                    hintStyle: whiteSubHeadingTextStyle.copyWith(color: hintTextColor)),
              ),
            ),
          )

And another design from the left side of Super Likes Text , the center of 5 text and the last text of 1h, to display this we can use Row widget again. Inside the Row widget , we can use three Text Widgets. Like this:

 Row(
   children: <Widget>[
     Text("Super likes",...),          
        Text("5",..),      
        Spacer(),
         Text("1h",..),
     ],
    )

The last thing to display a list design , we can use ListView.builder widget. If you want to scrolling the listview, we can use Expanded , that will wrap ListView.builder widget. For display the item look like a card, we can use Card Widget inside ListView.builder widget.Inside a Card widget to display subtitle, we can use ListTitle widget with subtitle property. Inside the card the first thing wanted to display item is used leading property and for the last item trailing property. And we need to add itemCount: 10 property for how many list item will display. This example is item count for 10 times.

 Expanded(
   child: ListView.builder(
      itemBuilder: (context, index) {
         return Card(
           child: ListTile(
             title: Text(.....),
               subtitle: Row(...),
               leading: ClipOval(...),
               trailing: SizedBox(...),
                ),
               );
             },
      itemCount: 10,
            ),
          ),

Hope you enjoyed this article.

By Ami

開発/検証環境を手軽に構築するためにはXamppの導入は有効ですが、Xamppに含まれるDBが本番サーバーのDBと異なる場合、同じものにあわせて検証をおこなう必要があります。
今回は本番サーバーのDBがMySQLと仮定して、Xamppに含まれているMariaDBをMySQLに置き換える方法をシェアしたいと思います。
本記事は前回の「XamppのMariaDBをMySQLに置き換える方法(1)」の続きです。

続きを読む

What is flutter turtle? This is a simple presentation of turtle graphics for flutter. It can simply apply to draw graphics with a custom painter like a logo language.

Flutter turtle is two classes, named with TurtleView and AnimatedTurtleView. To create a turtleView, both of classes require commands parameter. If you want your logo to repeat 5 times and forward 100 , right 200. You can use like this using commands parameter.

[
  Repeat((_) => 5, [
    Forward((_) => 100),
    Right((_) => 200),
  ]),
];

With more information about flutter turtle, check on flutter pub.dev.

Example code :

Widget build(BuildContext context) {
  return Scaffold(
    appBar: AppBar(
      title: const Text('TurtleView'),
      centerTitle: true,
      elevation: 0,
    ),
    body: TurtleView(
      child: Container(),
      commands: [
        PenDown(),
        SetColor((_) => const Color(0xFF006EFF)),
        SetStrokeWidth((_) => 2),
        Repeat((_) => 20, [
          Repeat((_) => 180, [
            Forward((_) => 25.0),
            Right((_) => 20),
          ]),
          Right((_) => 18),
        ]),
        PenUp(),
      ],
    ),
  );
}

Hop you enjoyed this article!

By Ami

開発/検証環境を手軽に構築するためにはXamppの導入は有効ですが、Xamppに含まれるDBが本番サーバーのDBと異なる場合、同じものにあわせて検証をおこなう必要があります。
今回は本番サーバーのDBがMySQLと仮定して、Xamppに含まれているMariaDBをMySQLに置き換える方法をシェアしたいと思います。

続きを読む