What Is Flutters Font Size Based On Screen Size?

What Is Flutters Font Size Based On Screen Size: Flutter is a popular open-source framework for building mobile, web, and desktop applications. It has a rich set of widgets and tools that allow developers to create beautiful and responsive user interfaces. One important aspect of designing user interfaces is ensuring that the fonts used are appropriate for the screen size. In this article, we’ll discuss how to set font sizes in Flutter based on screen size.

Why Font Size Matters

Font size is an important aspect of user interface design. It affects the readability and usability of the application. If the font size is too small, users may struggle to read the text, resulting in a poor user experience. On the other hand, if the font size is too large, it may take up too much space on the screen, reducing the amount of content that can be displayed at once.

Setting Font Sizes

in Flutter Flutter provides several ways to set font sizes in applications. One common approach is to use a fixed font size for all screen sizes. However, this approach may not be suitable for all devices, as screen sizes vary widely across different devices. A better approach is to set font sizes based on the screen size, which ensures that the fonts are appropriate for the device being used.

Using Media Query

Flutter provides a MediaQuery widget that can be used to get information about the device’s screen size. The MediaQuery widget is a top-level widget that can be accessed from any part of the widget tree. It provides information such as screen width, screen height, device pixel ratio, and more.

To set font sizes based on the screen size, we can use the MediaQuery widget to get the screen width and height, and then use these values to calculate the font size. For example, if we want to set the font size to 16 for devices with a screen width less than 600, and 24 for devices with a screen width greater than or equal to 600, we can use the following code:

double screenWidth = MediaQuery.of(context).size.width;

double fontSize = screenWidth < 600 ? 16 : 24;

Text(
  'Hello World',
  style: TextStyle(
    fontSize: fontSize,
  ),
);

In this code, we get the screen width using MediaQuery.of(context).size.width, and then set the font size to 16 if the screen width is less than 600, and 24 if the screen width is greater than or equal to 600.

Using Layout Builder

Another approach to setting font sizes based on screen size is to use the LayoutBuilder widget. The LayoutBuilder widget provides information about the constraints of the widget’s parent, including the maximum and minimum width and height. We can use this information to calculate the font size based on the screen size.

For example, if we want to set the font size to 16 for devices with a screen width less than 600, and 24 for devices with a screen width greater than or equal to 600, we can use the following code:

LayoutBuilder(
  builder: (BuildContext context, BoxConstraints constraints) {
    double screenWidth = constraints.maxWidth;

    double fontSize = screenWidth < 600 ? 16 : 24;

    return Text(
      'Hello World',
      style: TextStyle(
        fontSize: fontSize,
      ),
    );
  },
);

In this code, we use the LayoutBuilder widget to get the maximum width of the widget’s parent using constraints.maxWidth, and then set the font size to 16 if the screen width is less than 600, and 24 if the screen width is greater than or equal to 600.

Conclusion

Setting font sizes based on screen size is an important aspect of user interface design in Flutter. Using the MediaQuery and LayoutBuilder widgets, we can easily set font sizes that are appropriate.