Flutter Course: 10.1 Handling Main Buttons in Flutter

Flutter is an open-source UI software development kit (SDK) for mobile application development, providing cross-platform capabilities. One of the reasons many developers choose Flutter is its excellent performance and flexibility. In this post, we will take a closer look at Flutter’s button widgets. Buttons are one of the most important UI elements for user interaction, and we will cover a wide range of topics from basic usage to advanced techniques.

1. Importance of Buttons

Buttons play a very important role in the UX/UI of applications. Users interact with the application through buttons, and the feedback generated during this process greatly affects their experience. Therefore, when designing buttons, intuitiveness and user-friendliness should be considered.

2. Types of Buttons Available in Flutter

Flutter offers various types of buttons. Each button is optimized for specific situations and purposes.

2.1. RaisedButton

RaisedButton is a button that gives a three-dimensional effect, providing a feel of being clickable to the user. It generally follows the principles of Material Design.

RaisedButton(
        onPressed: () {
            // Code to be executed when the button is clicked
        },
        child: Text("Click Here"),
    )

2.2. FlatButton

FlatButton is a flat button without a background, commonly used in various situations. It allows for more subtle interactions with the user.

FlatButton(
        onPressed: () {
            // Code to be executed when the button is clicked
        },
        child: Text("Button"),
    )

2.3. IconButton

IconButton is a button that uses only an icon. It provides simple functionality and is useful when emphasizing visual elements over text.

IconButton(
        icon: Icon(Icons.add),
        onPressed: () {
            // Code on click
        },
    )

2.4. FloatingActionButton

FloatingActionButton is a circular button that floats over a specific position on the screen, typically representing the most important action. It helps users to take action easily.

FloatingActionButton(
        onPressed: () {
            // Code on click
        },
        child: Icon(Icons.add),
    )

3. Styling Buttons

Changing the style of buttons is very important for improving the user experience. In Flutter, you can apply various styles to buttons through the buttonStyle property.

3.1. Changing Colors

RaisedButton(
        color: Colors.blue,
        textColor: Colors.white,
        onPressed: () {
            // Code on click
        },
        child: Text("Blue Button"),
    )

3.2. Adding Borders and Shadows

RaisedButton(
        onPressed: () {},
        child: Text("Add Border"),
        shape: RoundedRectangleBorder(
            borderRadius: BorderRadius.circular(5),
            side: BorderSide(color: Colors.black),
        ),
    )

4. Animation Effects

Adding animation effects to buttons provides a better experience for users. Animations can be applied during state changes of the button (e.g., when clicked).

4.1. Using Hero Animation

Using Flutter’s Hero animation, you can add animation effects to buttons during page transitions.

Hero(
        tag: 'my-button',
        child: RaisedButton(
            onPressed: () {},
            child: Text("Hero Button"),
        ),
    )

5. Managing Button State

Managing the changes between the pressed state and the default state of a button is essential for enhancing user experience. You can manage the button’s state using StatefulWidget.

class MyButton extends StatefulWidget {
        @override
        _MyButtonState createState() => _MyButtonState();
    }

    class _MyButtonState extends State {
        bool _isPressed = false;

        @override
        Widget build(BuildContext context) {
            return RaisedButton(
                onPressed: () {
                    setState(() {
                        _isPressed = !_isPressed;
                    });
                },
                child: Text(_isPressed ? "Pressed" : "Not Pressed"),
            );
        }
    }

6. Optimizing Buttons for User Experience

The size, spacing, and labels of buttons all greatly affect user experience. The button size should be sufficiently large, considering the touchable area, allowing users to click easily. In Flutter, you can set the external margins of buttons using the Padding widget.

Padding(
        padding: const EdgeInsets.all(8.0),
        child: RaisedButton(
            onPressed: () {},
            child: Text("Button with Padding"),
        ),
    )

Conclusion

In this article, we explored the major types of buttons and their usage in Flutter. Since buttons play an important role in user interaction, they should be implemented with careful consideration of design and functionality. In future learning, practice optimizing user experience by using buttons in various situations.

Buttons may be fundamental elements of an application, but they can greatly enhance user experience. Create an attractive interface through various types of buttons, styles, and animation effects. Don’t forget to keep learning and trying new features in the ever-evolving Flutter ecosystem!