1/22/2024 0 Comments Flutter scaffold body screenThe Flexible widget is used to adjust the child’s content location within the screen. In the code below, we use the Expanded widget with flex set to 1, and a regular container showing the effect of the Expanded widget and its properties: Expanded(įlexible widgets are pretty similar to Expanded widgets, but the significant difference is in their properties. Flex is used to distribute the contents of the child widget unevenly. The child widget is placed inside an Expanded widget, which can take in rows and columns. Properties of the Expanded widget include the child widget and the flex widget. For better optimization, it is used in a row or columns. The Expanded widget is a single child widget, meaning that only one child can be assigned to it. “Content undersize for large screens” is simply a UI error in which the content is too small or too large for a particular screen due to Flutters’ flexibility.īoth of these problems can be resolved using Flexible or Expanded widgets, providing a better UI and dev experience. This is one of the most frequently encountered Flutter framework errors when it happens, you’ll see yellow and black stripes indicating the area of overflow in the app UI, in addition to the error message in the debug console. There are two reasons why creating a responsive screen layout in Flutter using containers for content is not advisable.įirst is a RenderFlex overflow. Basically, a container is a box into which we can pass content. It manages them through width, height, background color, and padding, among other descriptors. In Flutter, a container is a parent widget containing multiple child widgets. Flutter installed on your local machine.To understand and follow along with this tutorial, you should have the following: We will also design a demo of Expanded and Flexible widgets, and describe their properties and how to use them in a Flutter application. In this article, we will explore Expanded and Flexible widgets in Flutter for screen responsiveness.ĭue to Flutter’s cross-platform, single codebase ability, it is essential to understand screen management to prevent problems like the flex overflow errors or bad user interface design. Create responsive layouts with Flexible and Expanded widgets in Flutterīuilding responsive screen layouts means writing a single piece of code that responds to various changes in the device’s layout, so the app displays its UI according to the screen size and shape of the device. Chinedu Imoh Follow Chinedu is a tech enthusiast focused on full-stack JavaScript and Infrastructure engineering.
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