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A Quick Guide to Set Flutter Drawer Header Height

You must have seen the slider-like menu that comes out from the left side of the screen (mostly) as you tap on the AppBar icon. We call it Drawer and it has a couple of actionable buttons that you can access and navigate to their page directly. In Flutter, a drawerheader is the same menu that appears when we type the three lines button that appears on the top left side of the Gmail app and has the buttons like “All inboxes, primary, social, promotions”, etc. In this blog, we will discover how to change flutter drawerheader height in an easy way. We will be giving you a demo of this and providing the output screenshot with a sample code as well. Sounds exciting? 😛  Let’s jump right into it. 😉 How to add Drawer Header in Flutter? To add a drawer header in Flutter, you can simply use DrawerHeader class and assign any color using the ‘color’ property in the ‘BoxDecoration’ class. Let’s do this by giving you an example. Code   Output Now, let’s move toward knowing how to change drawer header height in Flutter.  How to change drawer header height in Flutter?  If you want to change drawer header height, you will need to wrap the DrawerHeader class inside the SizedBox widget. This is because DrawerHeader class doesn’t have any property that could handle drawerheader height.  So we use the SizedBox widget to change drawer header height because it has properties of ‘height’ and ‘width’. You can specify Flutter drawer header height as much as you can. Just change the value of the ‘height’ class and you’ll notice the change in DrawerHeader height.  Let’s do it ourselves. 😍 Code Output As you can see, we have used the SizedBox widget to wrap the DrawerHeader class. It will allow you to change the DrawerHeader height according to your needs. In this way, we can specify any height for the DrawerHeader using the height property. Moreover, you can change the drawer header color as well. Simply choose any color from the colors property of BoxDecoration and that’s it. Conclusion The DrawerHeader height in flutter can be set using the height property as it’s an important aspect of customization for the flutter drawerheader. It also helps in providing an optimal user experience. Drawer Header height can be adjusted according to the requirement, which will help in providing a better view of the Drawerheader contents. That was it for this quick guide to adding Drawer Header and changing its height. We hope you may find this article helpful for you.  If you’re looking for a Flutter app development company to hire Flutter developers then you can count on us for that. We have a team of highly qualified Flutter developers who can turn any of your complex business ideas into real-world applications.  See you in the next blog. Cheers!

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How to Show Custom Snackbar in Flutter?

Snackbar is a quick piece of information bar that appears briefly at the bottom of the screen. It’s used to display short messages that the user doesn’t necessarily need to interact with, such as “Changes saved successfully.” or “No internet connection.” In Flutter, it’s easy to create a Snackbar using the Scaffold.showSnackBar() method. Using Snackbar in Flutter is a quick and easy way to provide feedback to the user. It’s a great alternative to Toast in Flutter, which is a native Android widget because it allows the user to interact with it by dismissing it or performing an action. Let’s have a sneak peek at Flutter toast vs snack bar. Flutter Toast vs Snackbar Toast and Snackbar are both used to display brief messages to the user, but there are some differences between them. Toast is a native Android widget that appears at the bottom of the screen and disappears after a certain period of time. It’s not interactive and the user cannot dismiss it. On the other hand, Snackbar is a material design element that appears at the bottom of the screen and can be dismissed by the user by swiping it away or tapping on an action button. Snackbar also allows the user to undo an action by tapping on the “Undo” button. How to Show Snackbar in Flutter To show a Snackbar in Flutter, you need to use the Scaffold.showSnackBar() method. The Scaffold is a widget that provides a framework for organizing the visual structure of your app. It’s often used as the top-level container for an app. Here’s an example of how to show a Snackbar in Flutter:   In this example, the Snackbar will appear at the bottom of the screen and display the message “This is a Snackbar“. You can see that here in the screenshot: Output: How to Show Flutter Snackbar on Top Position? There is no such property of snackbar to assign the top position to it as in Toast. So, if you want to show snackbar on the top of your screen, you need to exclude the height, taking the bottom as a reference. As you can see the code here and the result in the screenshot:   Output Flutter Snackbar Without Context There are certain times we don’t have the context to define depending upon certain business logic. In that case, we use scaffoldMessengerKey to show snackbars without needing context with just one GlobalKey. Here is the code. Now, let’s move toward changing snackbar color. How to Change Flutter Snackbar Color You can customize the color of the Snackbar using the backgroundColor property. Here’s an example of how to show a Snackbar with a red background color:   Output: Flutter Snackbar Duration If you’re wondering how long would snackbar stay there then mind that the default snackar duration is set up to 4 seconds. However, you can specify a different duration using the duration property. Here’s an example of how to show a Snackbar that lasts for 8 seconds:   So this will allow you to display the snackbar for 8 seconds. Moreover, you can specify any number of seconds to show the snackbar up to. Flutter Floating Snackbar You can create a floating Snackbar by setting the shape property to RoundedRectangleBorder and the elevation property to 8.0. Here’s an example of how to create a floating Snackbar:   This will create a Snackbar with rounded corners and a shadow. Conclusion In this tutorial, we learned about Snackbar in Flutter and how to use it to display brief messages to the user. We also learned about the differences between Toast and Snackbar, and how to customize the duration, color, and shape of the Snackbar. We hope this tutorial helps you show snackbar and give you ways to customize it fully. Feel free to share your thoughts or queries in the comments below. Or you can hire Flutter developers who would love to assist you to build highly intuitive apps for your business.

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How to Show Custom Toast Message in Flutter?

You must have seen a quick pop-up-like message that appears on the lower portion of the screen (mostly) and disappears after a couple of seconds. That message is to address the users about the action that they perform at that moment. An example would be displaying “Welcome to the app (your app name)“ when a user successfully logs in to your app.  In this blog, we will be exploring how to show toast in Flutter with a flutter toast package. You can show any custom toast in flutter depending on your need or the client’s requirements. So, after going through this quick guide, you won’t need to look further because we will be discussing in detail with code examples about how to show custom toast in Flutter. While building mobile apps, you should value adding little elements to your apps. They collectively make your app’s UI more interesting and enhance the user experience to much extent. These small additions could be a button, icon, or text field (at certain places), or basically anything that could help users leverage your app’s features more efficiently.  Flutter Toast Package Fluttertoast is a package for the Flutter framework that allows developers to easily display lightweight, transient notification messages in their apps. These messages, also known as “toasts,“ can be used to inform the user of an action they have taken, provide a brief update or message, or simply acknowledge that an action has been completed. Toasts can be displayed as banners at the top or bottom of the screen and can include text, images, or both. They are designed to be unobtrusive and easy to use, making them useful tools for developers building Flutter apps. Related topic: How to Custom Snackbar in Flutter? Let’s begin with learning how to show toast in Flutter. We will be covering everything related to the Flutter toast package including how to show toast in flutter and how to customize the toast messages. How to Show Toast in Flutter? Flutter does not have a widget just for showing toast messages, so we use the flutter toast package. Interestingly, fluttertoast plugin offers you complete customizations same as you can do with the snack bar in Flutter.  Hold on! We are about to dive into exploring what customizations we can do to show toast in Flutter. So, how do you add toast in Flutter? Here are the simple steps to do that. After it, we will be doing customizations to the toast message. First of all, you need to add the dependency in the pubsec.yaml file of your project.  So go to the pubsec.yaml file and paste the following line to add the fluttertoast dependency. Next, you need to import fluttertoast package into the dart file where you want to show toast message in Flutter. Use this code: Now that you have successfully imported flutter toast package, you can easily show toast in Flutter. Here is a Flutter toast message example for you to show toast message using the following code.   Output Replace the ‘msg’ with any random text you want to display as a toast in Flutter.  Now let’s explore how can you show a custom toast in Flutter. Custom Toast in Flutter You might wonder if we can change the toast message that appears on the screen. The answer to this question is yes. You can make show custom toast in Flutter by changing its position, font size, background color, and font color. Seems interesting, right? 😍 Let’s make a custom toast in Flutter. If you want to show toast message somewhere top, left or right side of the screen then you can call gravity property. It allows you to show toast message anywhere within your app.  Let’s see how can we leverage the gravity property in fluttertoast.   Output: As you can see, if we call the ToastGravity.TOP property, the toast message will appear on the top of the screen. Similarly, you can call several other properties to show toast messages differently on the screen. Some other properties of the flutter toast package are: You can use any of these properties to show toast in Flutter accordingly, i.e bottom, center, top left, etc.  Next, we can also change the font size of the toast in Flutter. It’s that simple:   Output And if you want to change the background color of the toast message, here’s how you do it.   Output Similarly, if you want to change the text color of toast message, here’s the way.   Output Conclusion That’s a wrap for now and we hope that you get to have a clear understanding of how to show toast message in Flutter. We have given a flutter toast message example for each of the different uses. You can get an idea of the code and make the changes on your own and build highly interactive Flutter apps. If you want to lighten your load of developing apps or want to hire a flutter developer then you can count on us. We have a team of skilled developers with a proven background in building intuitive and innovative apps for businesses worldwide. You can have a glimpse of our portfolio here. Furthermore, if you have any questions related to Flutter app development, you can put your queries in the comment section. We would love to hear from you.

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How to Create Custom Cards in Flutter?

Let’s see what we’ve got at the start. Result: What now? Is this it? No, not really. We will need to customize the Flutter card ourselves. For now, this code will just create a default card on your app’s screen as in the screenshot above. Now, let’s customize Flutter cards.  Changing Flutter Card Color We can change the card color using the color property. As you can see in the code below: Result: Flutter Card Rounded Borders To make the card borders round, wrap the card’s child around a Container widget. Specify the rounded rectangle border for the card. And then do the same with the colored border side for the container. Result: As you can see the borders of the card have been rounded. Card Shadow in Flutter To make the card look more prominent, we use the elevation property that adds a shadow behind the card in Flutter. And you need to pass the elevation property for this. See the code: Result: Change Card Shadow Color in Flutter Now if you want to change the shadow color then you need to use shadowColor property. Here is the code: Result: As you can see, the shadow color has been changed to purple. Not a big deal for you now, isn’t it? 😉 Create Custom Card with Image and Buttons in Flutter Here is the final form of the Flutter card with customized shadow, border, and colors as well. Final Form: Here is the final form of the card with the image and button in Flutter. You can use the code and make the changes yourself to practice creating cards in Flutter. Conclusion In this blog, we have briefly discussed and learned about creating custom cards in Flutter. We have also learned how to create a card with an image and button in Flutter. Moreover, changing the Flutter card color and creating a rounded border won’t be an issue for you now.  In the end, we have provided you with the complete code for creating a card in Flutter. Use it and make changes according to your needs and enjoy enriching the user experiences. We continuously share such valuable information about Flutter app development. Just head over to our blog and you’ll find plenty of guides and information related to Flutter app development services. If you still have any questions, please feel free to ask in the comments section. Our team of highly experienced flutter developers would love to assist you in any way possible.  Lastly, if you have a business idea and want to transform it into an app then you can hire flutter developers. We have a team of skilled Flutter developers entitled with open source contributors delivering top-notch tech solutions to businesses worldwide. Feel free to book a free discovery call with a Flutter developer today.

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Using Dart Enum in Flutter (Explanation and Example)

Dart has introduced enumerated types in its 1.8 release. Unlike Swift, the dart enum is the more basic one. Enums are similar to class and hold different constant values. This post will show how you can use them in a Flutter. What is a Dart Enum? Dart enum are predefined named constants. Code becomes cleaner and easier to understand when they are used. In enumeration, finite types are stored under a single-type definition. These are declared by using a keyword enum.  Dart Enum Constructor The important thing to note here is that you have to separate identifiers with commas. As with arrays, the Dart enum index starts at 0 for the first value. Why Use Enums in Flutter Enums are great alternatives for representing a change of states in Stateful widgets in Flutter development. Instead of declaring each state separately, you can use an enum. For instance: By using an enum, you can write this piece of code as: Use UpperCamelCase for declaring an enum state like the weather. While lowerCamelCase for the enumeration list.  Secondly, if you know the fixed values for a variable, you should use an enum. In the above example, the weather states are already known,  making an enum the best option.  Most times, developers use int variables for describing states. For instance, 0 for loading, 1 for running, and 2 for error. You can instead use an enum to write more compact code. The same can be said for booleans.   Here is how Dart enum proper use looks like: Related Post – Flutter StreamBuilder Enum in Switch Block The best use of an enum is in the Switch block. However, to run the code correctly, you must use case blocks. Here is what  the code looks like: Dart Enum with Extensions Dart provides extension methods that can be very useful. When you combine enums and extension methods, you can write cleaner and more robust code. Here is the implementation of extensions in Dart enums: Dart Enum To String Flutter can’t use the default toString() for enum types. So, here is how you convert an enum to a String: Dart Enum To Int Enums are class types for storing constant values, which can be either strings or numbers. In comparison, an Int is a numeric type predefined in Dart. Therefore, you can’t automatically convert an enum to an Int directly.  Here is how you can easily convert an enum to Int: Conclusion This blog post provided an overview of Dart enums and demonstrated their implementation in Flutter. We hope that you now have a better understanding of this concept and feel confident in utilizing it in your future Flutter projects. If you require further assistance or want to take your Flutter development to the next level, don’t hesitate to hire flutter developers who can help bring your ideas to life. Happy coding!

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How to Add Space Between Rows? Easy Way to Do It

We use several elements to build the UI of an application. We create these elements using widgets in Flutter. Think menu items, buttons, text fields, scroll bars, and customized dropdowns. All of these are created using widgets.  There are some widgets that you can see (Flutter conditional show widgets), and some that you cannot (stateless widgets). If we talk about stateful widgets, these are texts, images, icons, buttons, etc. Stateless widgets, however, define how the visible ones will appear on the screen. You’ll need to be aware of both types of widgets to better understand the schema of an app’s UI.  Flutter row spacing is an important aspect of the UI design. At times, developers get confused about placing elements in rows and columns. After reading this guide, you won’t have difficulty dealing with the UI of your app. Let’s deep dive into exploring flutter row spacing and get to know how you can build app UIs more efficiently. What is a Row Widget in Flutter? Flutter frameworks come with multiple widgets, among which one is the row widget. As the name suggests, it is used to display elements in a row or align them horizontally. We need to apart the elements being presented in a row to make the UI look cleaner and enhance user experience at the same time. So flutter row spacing remains helpful in achieving this desire of ours. Flutter Row Spacing  The row widget has a couple of properties that allow you to align the elements or place them in the row according to your preference. These properties are SizedBox, Spacer, MainAxisAlignment, and Expanded. In this blog, we will seize up each of the methods to add space between row widgets in Flutter. So, without further ado, let’s move toward the ways to add space between rows in Flutter right away. 1. SizedBox SizedBox is by far the most flexible, easy-to-understand, and reliable method for flutter row spacing.  A SizedBox widget is simply an empty box if no constraints are provided. By default, its height and width are based on the parent widget’s size, but you can change them to suit your needs. The SizedBox widget requires you to specify the width property if you use it in the row widget. Similarly, you need to specify the height property in case you’re using SizedBox in the column widget.  👉 How to Adjust Flutter Font Size on screen size? Here is the code example of how you use SizedBox for Flutter row spacing: Output: 2. MainAxisAlignment MainAxisAlignment property can help you add predefined space between the widgets. You need to add a child widget to space the elements in a row. Interestingly, there are three child widgets in MainAxisAlignment. These are spaceBetween, spaceEvenely, and spaceAround. Let’s discuss each of them.  i) spaceBetween The spaceBetween row’s child widget is used to specify the space between elements present inside a row widget. It automatically places your elements in the desired place determining the screen size. Here is the example code: Output ii) spaceEvenly The spaceEvenly child widget allows you to keep equal space between the elements present in a row.  Here is the code example: Output iii) spaceAround The spaceAround child widget also places even space between two elements, but also half of that space before and after the first and last child.  Here is the code example: Output 3. Spacer Using the spacer widget, you can space the elements present in a row and can adjust the space according to your desire. If you don’t specify the space, the spacer widget takes all the space available and drags the elements to the far sides. If you want to control the space between widgets, you can use the Flutter flex property, which defines how much space you want to keep between the two widgets.  Here is the example code for using the spacer for flutter row spacing. Output 4. Expanded Widget Using the Expanded widget is another method of adding spaces between the row elements. As you wrap any child row inside the Expanded widget, it covers the space available on the entire screen.  Here is the example code for you to have a clear idea of how it works: Output Conclusion As you have read that we have explored all the possible ways for adding space between rows in Flutter. If you ask for a recommendation, we would suggest going with the mainaxisalignment one because it gives you full control over the element placement. You can leverage different child widgets of its which are space around, space-between and space evenly. If want to hire a Flutter developer for any of your app development needs then you can definitely count on us. We are a team of skilled developers having a proven track record of building successful apps for businesses worldwide. Have a glance at our app development case studies to have a better demonstration of our work.

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Waiting For Another Flutter Command To Release The Startup Lock

While working with Flutter, your VS Code may have shown you this error. It can be annoying at times, especially when you are a beginner. The reason for this “Waiting For Another Flutter Command To Release The Startup Lock” error is due to the malfunctioning of pubspec.yaml file, which may have resulted from multiple dart pub get commands.  Read on to learn how you can resolve this issue in a few quick steps.  Possible Solutions: Here are the possible solutions that you can try to fix the error “waiting for another flutter command to release the startup lock”. 1. Kill All Dart Instances  The easy way to solve this issue is by ending all the instances in the Dart. All you need is to open the terminal and enter these commands:  This command is for Linux. If you are using Windows, enter this command then: If this doesn’t work, move on to the next step.  2. Release the Occupied Lock Before removing the lockfile, you must shut down the Android Studio. The file is located within the Flutter Installation directory. You can release the occupied lockfile through this command in the terminal: The process will be different for Windows, macOS, and Linux. Read on to the next section if your operating system is using Windows.  3. Removing Lockfile in Windows The process to remove lockfile is different for Windows. Here is how you can do it: If that doesn’t work, you can shut down your PC and switch it on, but don’t use the restart function. In case nothing works, you do other things that are discussed in the following sections.  4. Clean the Cache of the Flutter Project For quick Cache clean-up:  The last resort is to get rid of Flutter.  Related Post – Disable Back Button flutter 5. Uninstall Flutter To uninstall Flutter, follow these simple steps: Conclusion This article gave you the solution to resolving the “Waiting For Another Flutter Command To Release The Startup Lock” error. We hope that it helps. We continue to bring such problem-solving guides for you all. Stay in touch with us so you don’t miss out on any future blog releases. To hire flutter developers, you can count on us for any of your flutter app development needs. Our professional and highly skilled Flutter developers will help you get your dream app in no time. Have a glimpse of our app development portfolio to have a better demonstration of what we have built so far.

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How to Adjust Flutter Font Size on Different Devices?

When you use the same app on different devices, the content may stretch or appear inappropriately. This disturbs the app’s UI and ultimately hurts the user experience as well. There could be a way where you could adjust font size based on screen size. That’s what you’re going to learn in this blog. There are different ways in which you can auto-adjust the font size according to the screen size. One way is to go with the BuildContext class and another way is to use LayoutBuilder class.  Overview Using BuildContext doesn’t give you much flexibility to resize your text. It traces each widget in a tree and locates them and their position inside that widget tree. Which limits the developer to specify the position and attributes of a widget.  Whereas, Layout Builder builds a widget tree that depends on the size of the parent widget. The LayoutBuidler is the most common method used to adjust Flutter font size.   Moreover, if you don’t define a parent widget using the LayoutBuilder method then Flutter will consider the device itself as a parent widget.  If we set the device’s screen size as a parent widget, the LayoutBuilder automatically adjusts the google font flutter size according to the screen size and the UI seems to be perfect on any screen that you open the app on. We just need to define a particular screen size and assign a font size to it. This way, the font size gets adjusted according to the screen size. Dynamically Resize Text Based on Screen Size (Mobile, iPad/Tablet, Web or Desktop) Mostly, the ideal screen size for mobile apps is less than or equal to 480 pixels in width. And that of iPad/tablet ranges from 481 to 960 pixels. Similarly, the web or desktop platforms have screen sizes of more than 960 pixels in width.  So we assign a particular font size to each of the screen sizes. As a result, the text fits perfectly on the screen size of the app opened on any device. Here is the code. LayoutBuilder( builder: (_, c) { final width = c.maxWidth; var fontSize = 16.0; if (width <= 480) { fontSize = 16.0; } else if (width > 480 && width <= 960) { fontSize = 22.0; } else { fontSize = 28.0; } return Center( child: Column( mainAxisAlignment: MainAxisAlignment.center, crossAxisAlignment: CrossAxisAlignment.center, children: [ Text( ‘This is a responsive text… as you can see it’s size is ‘ ‘adjusting on different devices’, textAlign: TextAlign.center, style: TextStyle(fontSize: fontSize), ), Text( ‘This is a responsive text… as you can see it’s size is ‘ ‘adjusting on different devices’, textAlign: TextAlign.center, style: TextStyle(fontSize: fontSize), ), Text( ‘This is a responsive text… as you can see it’s size is ‘ ‘adjusting on different devices’, textAlign: TextAlign.center, style: TextStyle(fontSize: fontSize), ), Text( ‘This is a responsive text… as you can see it’s size is ‘ ‘adjusting on different devices’, textAlign: TextAlign.center, style: TextStyle(fontSize: fontSize), ), ], ), ); }, ), As you can see, in the start, we have used the container final width = c.maxWidth; to specify the maximum width of any screen. Moreover, we limited the width to a particular extent just to categorize it for different types of devices. Following that, we have assigned the font sizes to each width range. This will display the font size accordingly. You can see the results for mobile, iPad/tablet, and web/desktop. Mobile: iPad/Tablet: Web/Desktop: Wrap Up Finally, it’s a wrap to the guide on how to automatically change the font size based on screen size. We hope that you have learned how to cope with different screens messing up the font size. We have provided you with the source code also. Use it to practice building scalable apps. Moreover, if you have any queries or suggestions related to Flutter app development or want to hire Flutter developers, feel free to reach out to us with your concerns. FlutterDesk, being a top-rated Flutter app development company is always open to help.

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How to Customize Flutter Dropdown Button using DropDownButtonFormField?

The Flutter DropDownButton widget is one of the most useful widgets when building apps with Flutter. It gives you an ability to choose from multiple options available inside a button. This option is much useful when creating apps which require users to choose an option from multiple options. An example would be to choose the gender, which most of the apps require. You can customize dropdown button in Flutter using DropDownButtonFormField and its multiple properties. In this blog, we will be discussing everything about customizing DropDownButton in Flutter. Using DropDownButton widget, we can change the border radius, color, width and much more. But for that, we will need to create separate containers as well. So, we use DropDownButtonFormField instead which already has the ‘decoration’ property. Let’s see how to add dropdown button in Flutter. How to Add DropDown Button in Flutter Using DropDownButtonFormField?  To add dropdown button in a Flutter app, we can use DropDown widget. But this won’t allow us to customize the DropDown button and we will need to create a container to do that. So, we use DropDownButtonFormField class. It wraps the DropDownButton widget in a FormField and requires the items property to be defined in its constructor to perform several customizations. We will be doing that afterwards.   Related post: How to implement a dropdown list in flutter? Let us first get to know how to add DropDownButton in Flutter using DropDownButtonFormField. Here is the code to the add dropdownbutton. Code Example Result: You have seen how we added dropdown button using DropDownButtonFormField. We will be doing different customizations to the dropdown button with code example and the results. So you can have a clear picture of how to make changes to dropdown button in Flutter. Ready? Let’s customize. How to Add border radius OR rounded border to DropdownButton in Flutter? To add border to dropDownButtonFormField, we use decoration property that is already present in the DropDownButtonFormField. See here: Now let’s see how can you change the dropdownbutton radius to make a rounded border. Result Change Border Color of Dropdown Button If you want to assign a specific color OR change the width of the dropdown button, here is how you do it. Result And to change the color of dropdown list, use the following command. It will look something like this.  Change Dropdown Button Background Color If you want to change dropdown button background color, use fillColor property for that.  Here is how you do it: Change Dropdown Button Arrow Size and Color  Now, if you want to change the dropdown button size, its icon, or color, use the icon class for that. Here is the sample code for that. If you want to remove the border of dropdown button in Flutter, use decoration class and declare border as InputBorder.none. See here: The Final Form As you have seen a lot of customizations that we did with the dropdown button. Let us see the final form of dropdown button having different customizations in the code. The Final Code Final Result Conclusion In this blog, we covered everything related to customizing a dropdown button in Flutter. We hope that you get to learn so much out of this. Flutter comes with a lot widgets that collectively makes it a perfect framework for developers to build a interactive apps. Several takeaways contribute to develop a successful end product. This include product ideation, designing, wireframming, development, marketing, and what not. So. we need to consider all of them in order to build a product that excels the online marketplace at its best. Finally, it’s a wrap to the quick guide on how to add and customize the dropdown button in Flutter using DropDownButtonFormField. We have provided the source code for each of the customizations we did. Use them to practice, practice and practice. If you come across any hurdles, feel free to reach out to us. Our Flutter app development company has cooperative and dedicated Flutter developers that are always there to help Flutter aspirants.

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How to Disable or Override Back Button in Flutter?

One of the significant concerns of developers is how to disable or override the back button in Flutter. You can utilize several elements to provide better navigation to your app’s users. These include buttons, text fields, cards, checkboxes, dropdowns, etc.  It is essential to provide users with full control over your app. Similarly, a back button has a vital role in your app’s navigation. Sometimes, if a user taps the back button within your app, it reverts directly to the mobile phone’s menu screen, which negatively impacts user experience. Your app should ask for permission to confirm the exit. Because users may lose their progress within the app if it closes on an accidental tap. Additionally, if users input some information or data in the app, they may lose it if the back button has mistakenly been pressed. Instead, we should show a dialogue box asking the user to confirm the exit so that the information can be stored properly.  Let us first know what the WillPopScope widget is, and we will move toward knowing how to disable or override the back button in Flutter. What is WillPopScope Widget in Flutter? The WillPopScope is such a useful widget that comes with the Flutter framework. It gives you full control over the back button, allowing you to move between the screens. You can use this widget to either disable or override the back button in Flutter. Moreover, you can prevent certain unwanted conditions that were discussed at the start. Leveraging the WillPopScope widget ultimately enhances the user experience. How to disable back button in Flutter? To disable the back button in Flutter, we need to use the WillPopScope widget.  Follow these steps to disable back button in Flutter. Step#01: Wrap the scaffold or widget tree in the WillPopScope widget.  Step#02: Now add the onWillPop parameter inside the WillPopScope widget and create a function to handle its call back.  Step#03: Return false inside the callback. The back button will be disabled. You can also display a text addressing the back button is disabled, just to have a more transparent user experience. Here is the example code to disable the back button in Flutter. Code Example Result Now that you learned how to disable the back button in Flutter, you may need to show a dialogue box asking for confirmation whenever a user taps the back button in Flutter. This could be done using AlertDialog, but interestingly, the rest of the steps remain the same. How to Override Back Button in Flutter? (Display Custom Dialog Box Before Exiting) To display a custom dialogue box asking the user to confirm its exit, we need to override the back button in Flutter. We use the same WillPopScope widget for this purpose. And the AlertDialog class will display the alert box on the screen as the user taps on the back button. When the user taps the back button, it will show a dialogue box asking for confirmation to exit (Yes/No). If the user presses ‘no’, the dialogue box will disappear, and the user will remain in the app. Whereas, if the user presses ‘yes’, the app will be closed.  Related Post – dropdown list in flutter Here is the example code for you to override the back button in Flutter. Code Example: Result Conclusion You can enhance your app’s user experience by adding certain features and navigation components. As it is one of the major success factors, you should focus on enhancing user experience in every way possible. All you need to do is understand the end-user analyzing its behavior and needs. Your app will likely succeed in the app store if you keep the user first. Because it’s all about how much your app benefits the users.  Lastly, it’s a wrap to this quick guide on how to disable or override the back button in Flutter. We hope that you would have learnt much out of this. Still, if you have any queries or suggestions, feel free to contact us. We would love to assist you in any Flutter app development projects that you may have. You can also hire flutter developers for your Project See you in the next blog!

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