Building Responsive Apps in Flutter - Responsive UI

In this video, we explore the architecture of a responsive Flutter app and how to design layouts that adapt seamlessly to different screen sizes and orientations.

We start by discussing the three main layouts—Mobile, Tablet, and Desktop—and the best strategy to implement them. Following a Mobile-First Design approach, we scale the UI from smaller screens to larger ones, ensuring a smooth and adaptive experience across devices.

You’ll see a preview of the Tour App we’ll build in this course, where:

• The navigation menu is hidden on mobile but revealed on larger screens.

• The gallery layout transforms from vertical to horizontal as the screen size increases.

• The details panel is visible on desktops but navigates to a new screen on smaller devices.

To implement this, we’ll cover key Flutter widgets for responsive design:
? MediaQuery – Detect screen size changes.
? LayoutBuilder – Adjust layout dynamically.
? OrientationBuilder – Adapt UI based on device orientation.

By the end, you’ll have a solid understanding of how to structure a fully responsive Flutter app!

In this video, we dive into building a responsive Flutter app that adapts to different screen sizes and orientations, ensuring a seamless user experience across devices.

We’ll explore how to design three main layouts—Mobile, Tablet, and Desktop—and how to implement them using a Mobile-First Design strategy. Starting from small screens, we’ll scale the UI to larger ones, making sure it adjusts smoothly for all devices.

In the course, we’ll build a Tour App that demonstrates:

• A navigation menu that’s hidden on mobile and revealed on larger screens.

• A gallery layout that switches from vertical to horizontal as the screen size increases.

• A details panel is visible on desktops but navigating to a new screen on smaller devices.

To achieve this, we’ll cover essential Flutter widgets for responsive design: 

MediaQuery – Detect screen size and orientation changes.

LayoutBuilder – Dynamically adjust the layout.

OrientationBuilder – Adapt UI based on device orientation.

By the end of this video, you’ll understand how to create a fully responsive Flutter app that looks great on any device!

In this video, we'll be setting up the model and data structure for our Tour App.
This will help manage the information about different places that users can explore.

What you’ll learn in this video:

• Creating the Place Class:
  We’ll define a class to hold essential details like image, title, subtitle, and description for each place.

• Setting Up Images:
  Learn how to organize an images folder to store all the images for the places, and define this folder in the pubspec.yaml file to access them in the app.

• Building the Data List for Places:
  We’ll create a places.dart file inside the data folder, containing a list called allPlaces to hold all the place data.

• Managing States Data:
  We’ll also create a states.dart file, which will store a list of different states to display later in the app.

By the end of this video, you’ll have a solid foundation for managing the model and data in your Tour App, ready to be used for the app’s UI and functionality!

In this video, we will be building the UI for our Tour App, incorporating adaptive layouts for different screen sizes.
We'll focus on creating a responsive and interactive user interface that displays a gallery of places, along with a detailed view of each place.

Here’s what you’ll learn:

• Creating the App Layout:

  • Set up a consistent AppBar across the app.

  • Implement a Drawer that displays the states of the country, with adaptive visibility for mobile devices.

• Building the Drawer Widget:

  • Create a DrawerWidget that displays a list of states using a ListView.builder.

  • Add a custom DrawerHeader with a background image and a title, and build a list of states in the drawer menu.

• Gallery of Places:

  • Design the PlaceGalleryWidget to show places in a grid layout using GridView.count.

  • Display images of places in grid tiles and map each place to the GridItemWidget.

• GridItemWidget:

  • Create a Card widget with an image of the place and a title and subtitle using GridTileBar.

  • Make each grid item clickable, navigating to a detailed view of the place.

• Details Page:

  • Create a DetailsPage to display the detailed information of a place, including title, subtitle, image, and description.

  • Build PlaceDetailsWidget to organize the details layout with custom buttons and star ratings.

• UI Interactivity:

  • Enable navigation to the details page when a place is clicked, displaying detailed information in a new screen.

By the end of this video, you'll have a fully functional UI for the Tour App, featuring a gallery of places, a drawer for states, and an interactive details page for each place. We’ll also ensure the UI adjusts smoothly across different screen sizes, from mobile to tablet!

In this video, we will focus on adjusting our Tour App's UI to be fully responsive on tablet screens.
We’ll ensure that the app layout adapts seamlessly when the screen size increases, such as when running the app on a tablet or larger window.

Key Takeaways from this video:

• Making the UI Responsive for Tablet Screens:

  • Adjust the layout by splitting the screen into two sections using Row and Expanded widgets.

  • Show the Drawer on the left side (using a flex value of 2) and the places gallery on the right (using a flex value of 5).

• Improving Responsiveness with AutoSizeText:

  • Integrate the AutoSizeText package to make the text size responsive when transitioning between mobile and tablet modes.

  • Resize text in the Drawer, the places grid items, and on the details page to ensure better readability on larger screens.

• UI Enhancements:

  • Update the DrawerWidget to show appropriately resized text for tablet layouts.

  • Make the title and subtitle of the places responsive by dynamically adjusting the font size based on screen width.

  • Ensure that the PlaceDetailsWidget also adapts with responsive text on tablet view.

By the end of this video, you’ll have successfully adjusted your app’s layout and text to ensure it looks and functions great on tablet screens, improving the user experience across different devices. Stay tuned for the next section where we’ll dive into using the LayoutBuilder for even more responsive design!

In this video, we will be discussing how to use the LayoutBuilder in Flutter to adjust the size and position of widgets dynamically based on the screen size. We’ll focus on enhancing our tablet layout to fix misalignments and ensure a better user experience across different devices.

Key Points Covered:

• Introduction to LayoutBuilder:

  • Learn how LayoutBuilder helps in building responsive layouts by providing constraints such as maxWidth, minWidth, maxHeight, and minHeight based on the current window size.

• Fixing Layout Issues in Tablet Mode:

  • Address the layout issues in the tablet mode where images, titles, and descriptions were not displayed properly (such as being stretched or misplaced).

• Responsive Design with Constraints:

  • We will check the maxWidth constraint to determine the layout to show. If the width exceeds a certain breakpoint (600.0), we will display a larger layout; otherwise, a smaller one will be displayed.

• Building Small and Large Layouts:

  • Small Layout: For smaller screens (mobile), we’ll display a ListView containing the image, title, buttons, and description of the place.

  • Large Layout: For tablets and larger screens, we’ll use a Card widget with a Row that divides the content into two sections: one for the image and title and another for the buttons and description. We’ll also wrap the card in a SingleChildScrollView to make the content scrollable in case the screen is too small to fit all content.

Final Result:

• After using LayoutBuilder, the place details layout will adjust correctly based on the screen size. The content will be well-aligned, with the correct design showing on both tablet and mobile layouts. As the window size changes, the layout will seamlessly switch between mobile and tablet designs.

This should give your audience a clear understanding of what they will learn in the video!

In this video, we will be focusing on adjusting our Tour App UI to work seamlessly on Desktop screens.
Until now, everything has been working fine on mobile and tablet devices, but as the screen size increases (e.g., on a web or desktop layout), we need to make our app responsive to adapt accordingly.

Key Takeaways from this video:

• Making the UI Responsive for Desktop Screens:

  • Split the desktop layout into three parts using Row and Expanded widgets:

    • The first part will show the Drawer widget.

    • The second part will display the places gallery.

    • The third part will show the details of the selected place below the gallery.

• Enhancing the Layout with Expanded Widgets:

  • Use Expanded widgets to make sure the layout adjusts dynamically to the available screen space.

• Making the Places Gallery Horizontal on Desktop:

  • Implement horizontal scrolling for the places gallery when the app is viewed on a desktop by setting crossAxisCount to 1 and axisDirection to Axis.horizontal.

• Handling Place Selection and Displaying Details:

  • Use the onPlaceChanged function to update the selected place, and display the place details right below the gallery on the desktop layout.

• Implementing Navigation for Mobile and Tablet Layouts:

  • Ensure that when a place is clicked in mobile or tablet layout, the app navigates to the DetailsPage for that specific place.

• Enabling Horizontal Scrolling for Desktop Layout:

  • Add horizontal scrolling functionality for the desktop layout by setting the scrollBehavior within the MaterialApp.

By the end of this video, your Tour App UI will be fully responsive across mobile, tablet, and desktop layouts, providing a smooth and dynamic user experience. Stay tuned for the next section, where we’ll discuss using the LayoutBuilder for even more advanced layout responsiveness!