Because Flutter is a multi-platform SDK, you need to add an app and ad units for both Android and iOS in AdMob. Before you start, you want to be familiar with the following AdMob glossaries —
Ad unit
Ad unit is a set of ads displayed as a result of one piece of the AdMob ad code. You can create and customize an ad unit in your AdMob account. Each ad unit has a unique identifier, called the ad unit ID. When you implement a new ad unit in your app, you’ll reference the ad unit ID to tell ad networks where to send ads when requested.
STEP 1 : Add an Android app
Use the following instructions to add an Android app to AdMob:
In the AdMob console, click ADD APP from the Apps menu.
When you’re asked ‘Have you published your app on Google Play or the App Store?’, click NO.
Enter Awesome Drawing Quiz in the App name field, and select Android as the platform.
Note : Make a note of your new app ID (ca-app-pub- xxxxxxxxxxxxxxxx~yyyyyyyyyy).
You’ll need to add it to the sample project’s source code to run ads.
STEP 2: Create ad units
To start adding ad units to AdMob:
Select Awesome Drawing Quiz (Android) from the Apps menu in the AdMob console.
Click the Ad units menu.
From the Ad units menu, follow the instructions to create a banner ad, an interstitial ad, and rewarded ad unit.
Banner
Banner ads occupy a spot within an app’s layout, either at the top or bottom of the device screen. They stay on screen while users are interacting with the app, and can refresh automatically after a certain period of time.
Banner Ad
Click the ADD AD UNIT button.
Select Banner as the format.
Enter android-adq-banner in the Ad unit name field.
Click CREATE AD UNIT to complete the process.
Interstitial
Interstitial ads are full-screen ads that cover the interface of their host app. They’re typically displayed at natural transition points in the flow of an app, such as between activities or during the pause between levels in a game.
Interstitial Ad
Click the ADD AD UNIT button.
Select Interstitial as the format.
Enter android-adq-interstitial in the Ad unit name field.
Enter android-adq-rewarded in the Ad unit name field.
Leave the default for Reward settings.
Click CREATE AD UNIT to complete the process.
✔Important: It usually takes a few hours for a new ad unit to be able to serve ads. If you want to test the ad behavior immediately, then use the preconfigured app ID and ad unit IDs instead.
Add your AdMob app ID by adding a <meta-data> tag and entering com.google.android.gms.ads.APPLICATION_ID. If your AdMob app ID is ca-app-pub-3940256099942544~3347511713, then you need to add the following lines to the AndroidManifest.xml file.
Create a new file named ad_manager.dart under the lib directory. Then, implement the AdManager class which provides an AdMob app ID and ad unit IDs for Android and iOS.
Make sure that you replace the AdMob app ID (ca-app-pub-xxxxxx~yyyyy) and the ad unit ID (ca-app-pub-xxxxxxx/yyyyyyyy) with the IDs you created in the previous step.
Congratulations !✨ You have reached the final step towards integrating Ads to your App !
Before loading ads, you need to initialize the AdMob SDK. Open the lib/home_route.dart file, and modify _initAdMob() to initialize the SDK before the game starts.
If you are planning to have your own mobile application, website, custom web app designed by a professional design team, or Have any type of query or concern regarding its concept, technical know-how, the best way to get it done then don’t hesitate to reach out to us .
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There are different object-oriented programming (OOP) languages and Dart is one of them, basically, keeping code clean and dry is one of the characteristics of OOP. In OOP you have regular classes, abstract classes, and interfaces but in the dart, there is another hidden feature which is called mixins and this gives you that wow! which sometimes every developer looks for but the question is how?
Basically, the concept of mixins comes into effect when you want to inherit multiple classes at the same time but as you know dart does not allow multiple inheritances (which is a good thing ) and there you stand with two options either create a duplicate method or create mixins, wait….mixins?🤔
What are mixins?
Mixins are simple classes that are instantiated by using mixin to avoid multiple class hierarchies. if we go by definitions there are some quotes here
A mixin declaration introduces a mixin and an interface, but not a class. The mixin introduced by a mixin declaration contains all the non-static members declared by the mixin, just as the mixin derived from a class declaration currently does.
Mixins are a way of reusing a class’s code in multiple class hierarchies.
Now you might get the sense behind the mixins. So let’s understand it by example
Problem:
To sort out this we will understand the concept of mixin by the real-world example so you can easily understand it.
Suppose we have two animal classes where we have different kinds of animals some of them have some same and some different qualities, for example, there are two classes — alligator and crocodile.
Both of them also come into the aquatic animal category but all animals who live in water don’t have the same behavior so here we could create an abstract class that would have the same sort of things that most aquatic animalshave.
Now if we mention any other aquatic animal that has some other behaviors then ??? should we create another class of different behavior ???
No, you don’t need because if that animal has some behaviors that reptile class consists and some which it does not then we have only the option to create a new class for that specific animal which will also extend reptile class.
You can do this but as you know flutter does not allow multiple inheritances then mixin comes into effect,
for example, see the code below there is class fish which have qualities like bit and swim but does not have crawl so if it extends that reptile class it would find some feature that it does not require then either fish class should create its own swim and bite method but it is code duplication so we would create Swim, Bite and Crawl as mixin classes.
In the above example as you can that using mixin classes does not require any special specifications you can inherit by using with keyword. You can inherit mulitple mixin classes.
But what if you want to limit the use of a particular mixin class —
Limiting the use of Mixins
Suppose if you want to prevent your mixin from being used on any class or you want to make you mixin class usable only for some class or its subclass it is basically you rely on some specific methods and field being already present.
For this, we only need to do only use “on” keyword.
So here in the example, as you can see that we have used on keyword to tell that it will only be used on reptile class and it will give access to its all functionality like Swim, Crawl and Bite mixins.
So with this example, you can get the sense behind the mixins, it actually very useful in avoiding the code duplication without inheritance. Mixins can also be limited to work with any specific class and it makes it a powerful feature in the app development.
If this article has helped you a bit and found interesting please clap!👏
Thanks for reading this article if you find anything that could be improved please let me know, I would love to improve.💙
Trusted across industries like manufacturing, healthcare, logistics, BFSI, and smart cities, Aeologic combines innovation with deep industry expertise to deliver future-ready solutions.
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This blog will guide you through adding an AdMob banner, an interstitial ad, and a rewarded ad to an app called Awesome Drawing Quiz, a game that lets players guess the name of the drawing.
✔Important : This blog provides both starter code for this App as well as the complete project code with AdMobs.
Awesome Drawing App
You can find the 📂 starter code for this app without ad mobs over here —
In the previous blog we did a basic setup by adding Awesome Drawing Quiz firebase admob plugin& initialized the admob SDK . Now we will use that setup to add it into our demo Awesome Drawing Quiz App .
In this section, you add a banner ad at the top of the game screen, as shown —
Banner Ad
✔STEP 1 :
Open the lib/game_route.dart file, and import ad_manager.dart and firebase_admob.dart by adding the following lines:
Next, initialize _isInterstitialAdReady and _interstitialAd in the initState() method. Because _onInterstitialAdEvent is configured as an ad event listener for _interstitialAd, every ad event from _interstitialAd is delivered to the _onInterstitialAdEvent method.
In this code, an interstitial ad is displayed after a user completes 5 levels. To minimize unnecessary ad requests, we start loading an ad when a user reaches level 3.
✔STEP 3:
In the onNewLevel() method, add the following lines.
// TODO: Load an Interstitial Ad if (level >= 3 && !_isInterstitialAdReady) { _loadInterstitialAd(); } }
When a game finishes, the game score dialog is displayed. When a user closes the dialog, it routes a user to the home screen of the Awesome Drawing Quiz.
Because interstitial ads should be displayed between screen transitions, we show the interstitial ad when a user clicks the CLOSE button.
Finally, release the resource associated with the InterstitialAd object by calling the InterstitialAd.dispose() method in the dispose() callback method.
That’s it! Run the project to see an interstitial ad displayed after the game finishes.
Add a Rewarded Ad in 3 steps !
In this section, you add a rewarded ad which gives a user an additional hint as a reward.
✔STEP 1:
First, add the members and methods for the rewarded ad in the _GameRouteState class. Note that RewardedVideoAd is a singleton object, so you don’t need to have a member for managing the instance of the RewardedVideoAd class.
RewardedVideoAdEvent.rewarded is the most important ad event in a rewarded ad. It’s triggered when a user becomes eligible to receive a reward (for example., finished watching a video). In this code, RewardedVideoAdEvent.rewarded calls the QuizManager.instance.useHint() method which reveals one more character in the hint string.
Also, according to the ad event, RewardedVideoAdEvent.rewarded updates the UI by changing the value of _isRewardedAdReady. Note that _isRewardedAdReady reloads the ad when a user closes the ad, to make sure the ad is ready as early as possible.
Next, allow users to watch a rewarded ad by clicking the floating action button. The button shows only if a user hasn’t used a hint at the current level and a rewarded ad is loaded.
Modify the _buildFloatingActionButton() method, as follows, to display the floating action button. Note that returning null hides the button from the screen.
lib/game_route.dart
Widget _buildFloatingActionButton() { // TODO: Return a FloatingActionButton if a Rewarded Ad is available return (!QuizManager.instance.isHintUsed && _isRewardedAdReady) ? FloatingActionButton.extended( onPressed: () { showDialog( context: context, builder: (context) { return AlertDialog( title: Text('Need a hint?'), content: Text('Watch an Ad to get a hint!'), actions: <Widget>[ FlatButton( child: Text('cancel'.toUpperCase()), onPressed: () { Navigator.pop(context); }, ), FlatButton( child: Text('ok'.toUpperCase()), onPressed: () { Navigator.pop(context); RewardedVideoAd.instance.show(); }, ), ], ); }, ); }, label: Text('Hint'), icon: Icon(Icons.card_giftcard), ) : null; }
✔STEP 3:
Finally, remove the rewarded ad event listener in the dispose() callback method.
lib/game_route.dart
@override void dispose() { ...
// TODO: Remove Rewarded Ad event listener RewardedVideoAd.instance.listener = null;
...
super.dispose(); }
That’s it! Run the project and watch a rewarded ad, to get an additional hint !
Congratulations ! You have now added all ads to your app ! If you missed something , you can find the completed code for this app in the 📂 complete folder.
Trusted across industries like manufacturing, healthcare, logistics, BFSI, and smart cities, Aeologic combines innovation with deep industry expertise to deliver future-ready solutions.
FlutterDevs team of Flutter developers to build high-quality and functionally-rich apps. Hire flutter developer for your cross-platform Flutter mobile app project on an hourly or full-time basis as per your requirement! You can connect with us on Facebook, GitHub, Twitter, and LinkedIn for any flutter related queries.
Wewelcome feedback and hope that you share what you’re working on using #FlutterDevs. We truly enjoy seeing how you use Flutter to build beautiful, interactive web experiences!.
Imagine, you woke up one fine day and you have an idea of an amazing app that can bring revolutionary changes, and you can see it clearly in your mind — you can picture it. You know that this app is going to solve a big problem for the users and you can see that people would like it too.
But if you haven’t built an app before and this is your first attempt, How Exactly are you gonna do it?
The ruthless Mobile App Development industry spares no-one with its cut-throat competition and building your own app in such a competitive environment can get really tough. There are so many things to take into consideration, that it gets very stressful to think clearly.
In this article, we will see a start to finish guide for building your mobile if you follow these steps in your plan. Let’s see what those are:
Identify The Purpose of the App
If you already have an idea for your app, that’s a great start. But to actually put that idea into reality requires clarity of the purpose. What are the mission and the purpose that the app is going to serve? What is that particular problem is the app going to solve? How is it going to make the lives of the users better?
Remember, all that starts well ends well! Define your goals early in the process to avoid chaos and any room for confusion.
Sketch Your Idea
You don’t need to be a professional artist to sketch out your app. By developing sketches you are laying the foundation for your future interface. In this step, you visually conceptualize the main features and the approximate layout and structure of your application.
You don’t need any specific tools to sketch your idea. You just need a pen and a paper and see your idea coming to life on paper.
List down all the features that you want in your app. I, personally, like to separate the features into two categories, ‘Must have’ and ‘Good to have’. List down the features that your app can’t do without under the ‘Must Have’ category. Other good features that are not crucial can come under the ‘’Good to have’ category.
Do Some Market Research
Before you jump into this market, do some research about it. Research who your competitors are, what are the new market trends around your idea. This research will give you an idea about your competitor’s strengths, weaknesses.
There are two types of market research you can do, that are the most helpful:
Finding out what mistakes your competitors are making or have made
Finding out if people are looking for an app like yours
You want to walk into the shoes of the customer, so to speak. Instead of assuming the needs and desires of the customers while sitting in your room in front of the laptop, go out and talk to the people.
Who is your app for? What are they like? How does your app impact a particular problem that users are struggling with? How are they currently solving that problem? What change do you, with your app, seek to make?
Sometimes, you build the app for yourself, and that’s alright. Do the market research just for the fun of it, to work on your craft. Don’t underestimate the importance of preparation, research, and insight, though!
Create Mockups Of Your App
It’s best to make mockups before you start to build the app. A mockup is a rough sketch of your app’s layout, user interfaces (UIs), and flow.
A mockup doesn’t include :
Detailed UI elements
Color schemes and effects
The precise placing of UI elements
A mock-up is a way of showing how your app looks without any unnecessary details. A mock is a functional and not an aesthetical approach to your app’s design.
A mockup should also describe the flow and interactions of your app. What happens when you tap on that button? How do you get from screen A to screen B? What is the navigation flow of your app?
Apart from creating your mockup, you need to create a storyboard for your app. It will work as a guideline for your app screens so that you will know about the connection between two individual screens and helps to track the user’s navigation.
There are a lot of mockups and wireframing tools available on the internet. I personally like to use Balsamiq. But other than that there are some more really good mockup tools like:
Proto.io
Moqups
InVision, and many more.
Develop a Prototype
After you’ve identified your approach of development, the next stage is developing a prototype. It is actually the process of taking your idea and turning it into an application with limited functionalities, it’s also called a minimum viable product (MVP). Choose the most basic features of the app and start prototyping them. The MVP allows the user to access and experience the app with tangible features rather than just visualizing or reading the product description.
The MVP is very useful in attracting investors, working with manufacturers, and finding licenses. You can also share the app with beta testers to get an idea about what needs to be changed to enhance user experience. You can find a number of prototyping tools online, the most popular ones are Balsamiq, Moqups, and HotGloo.
Start Designing Your App
Now that your app idea is taking shape, it’s time to start designing the application. Now is the time, where your designer’s job starts. He will now come up with a high-resolution version of what previously your mockups.
The design of the app includes pixel-perfect visual details, graphic effects, image assets, and sometimes even animations and motion design. It is crucial in this stage that you include the comments on the prototype given by the testers. After all, the app is going to be used by your target audience. Their experience on the app will drive you to the best User Interface.
Let’s Test Your Design
For the first time during the entire development process, you have the actual concept of your app in front of you. It helps to identify the bugs, crashes, and missing features.
To test your app, again there are so many online app testing platforms that can be helpful. Two of my personal favorites are MarvelApp and Framer. These platforms will allow you to import your screens, add links to test the flow and make the design clickable.
This process aims at creating an environment close to how the typical user works with your app.
Identify Your Development Approach — Native, Web or Hybrid
Selecting the right approach for developing your app is highly important. Ideally, the app development approach must be in accordance with the time and budget constraints.
Native
Native apps deliver the best user experience but also require significant time and skill to be developed. These apps are basically platform-specific (Android, iOS, Windows, etc.)and require expertise along with knowledge. Native apps take time to build and with an increase in time the cost of development increases.
Web
Web apps are quick and cheap ones to develop and can run on multiple platforms. These are developed using HTML5, CSS, and JavaScript code. These web apps are less powerful than native apps.
Hybrid
A hybrid approach is the latest and arguably the smartest approach to develop an app. This approach combines prebuilt native containers with on-the-fly web coding in order to achieve the best of both worlds. In this approach, the developer augments the web code with native languages to create unique features and access native APIs which are not yet available through JavaScript.
One of the best hybrid mobile app development technologies is Flutter. Backed by Google, Flutter has changed the way we build apps. It is the most cost-effective and efficient framework ever. If you’re building your app, build your app in Flutter. Highly Recommended.
Let’s build it
once your app’s design passes the usability test and you’ve decided your approach, it is time to give a proper structure to your dream project. This process covers the coding part and the actual realization of your application. The mobile app development stage incorporates multiple activities like establishing the appropriate development environment, developing different parts of the code, preliminary testing, and creating the mobile application that can be installed and tested.
Usually, there are three aspects of any app- back-end, APIs, and the app front-end. Development is usually done in stages and you can expect your developer to provide interim builds that you will be able to run on your device itself.
Back-end
Database and server-side objects become imperative for supporting functions of your mobile app by connecting to a network. Configurations and changes could be needed to support the desired mobile app functionality if you are using an existing backend platform. The server-side objects developed during this stage must be configured and tested with the other components of the app.
Application Programming Interface
An API is a set of practices, protocols, and tools for developing software applications. It specifies how software components interact. Additionally, this programming interface is used when programming GUI components.
Front-endanalysed
The front-end called “client-side” programming is what your app users interact with. It implements required structure, design, animation, and behavior that you can see on the screen when you open up the websites, web applications, or mobile apps.
Test & Improve
Running a code review process during development helps in making sure that there are no major bugs left at the end to solve. Once you have a visually appealing and fully functional application, it’s time your developer conducts a final test of usability with other colleagues. In this process, there may be bugs that were overlooked, but here your developer can apply the last tweaks to your product.
Let’s Make it Public — Release time!
After all the hard work that you’ve put into this project, it’s finally time to give your dream project a fly. Your app is all set to be released in the market.
Now, when it comes to app marketplaces, different market places have different policies when it comes to publishing a new app. For instance, Android doesn’t straightaway review a newly submitted app, they’ll pass it and you’ll be able to instantly add your app to play store. But in case of iOS, it’s completely different, Apple holds the right to review and approve/reject the app before it goes live. Which may take up to weeks time.\
So, always go through the different publishing policies, before you set your launch date.
Maintainance — The Most Crucial State
One of the most important aspects which are mostly ignored by the development agencies/companies as well as app owners is the post-development Support. There are numerous vendors in the market like Samsung, HTC, Motorola, Vivo, Nokia, etc. who have customized their android OS as per their needs. Apart from different customized android OS, they have separate hardware and display resolutions. And not just Android, even iOS platform also has different devices and display resolutions. This entire web of different Operating Systems makes it impossible to test the app on every other OS in real-time.
There are two ways the user will interact with the app, either online or offline. With different interactions, the app shows different behaviors and bugs. We use multiple crash reporting tools and regularly analyze the bugs to keep the app experience intact.
The first two months after the app deployment are the most crucial in terms of app sustainability. For that, we use multiple tools for bug collecting, reporting, and eventually resolving. This entire bug life-cycle ensures the app is not Error-prone after published.
Don’t Forget to Market Your App
Whether you have just released your app or your app has downloaded by many, you should never stop marketing the app. Mobile app marketing plays a very important role in making the app successful. Market it as soon as it is released so that it is not lost in the ocean of apps on app stores. You will know through the feedback whether the users liked the app or not.
FlutterDevs’Approach
Once you have an idea for implementation, the most important factor is to check it’s Technical and Economical feasibility.
In technical feasibility analysis, your concepts will be analyzed by our technical experts to check if it technically possible or if it has some challenges.
In economical feasibility, the project is analyzed for its budget. A lot of times the complexity of the project can increase the budget which should be kept in consideration and the client should know about this.
At FlutterDevs, our expert team members Do Free Technical and Economical Feasibility Interactions, so that the client knows about the product before investing their money.
We also have a team of expert analysts, who will analyze and compare your product/project with your direct competitors in the market and help you define a better value proposition of the project so that you stand out among the crowd.
At flutterDevs we have a huge experience in all the processes of application development like conceptualizing, developing, releasing, marketing, and maintenance of the app. We have a specialized team to handle each process.
If you have an app idea, we would love to hear it.
Trusted across industries like manufacturing, healthcare, logistics, BFSI, and smart cities, Aeologic combines innovation with deep industry expertise to deliver future-ready solutions.
Feel free to connect with us: And read more articles from FlutterDevs.com
FlutterDevs team of Flutter developers to build high-quality and functionally-rich apps. Hire flutter developer for your cross-platform Flutter mobile app project on an hourly or full-time basis as per your requirement! You can connect with us on Facebook, GitHub, Twitter, and LinkedIn for any flutter related queries.
Wewelcome feedback and hope that you share what you’re working on using #FlutterDevs. We truly enjoy seeing how you use Flutter to build beautiful, interactive web experiences!.
In flutter, state management is like a life support system where the whole App depends on, there are different state management techniques like Redux, MobX, bloc, flutter bloc, provider, and cubit. Actually Cubit is a cocktail of Flutter Bloc and Provider where we use some features of both techniques and In this article, we are going to learn how to use and implement Cubit, So before we go for its implementation firstly let’s have some cursory knowledge of it.
About Cubit :
Cubit is a lightweight state management solution. It is a subset of the bloc package that does not rely on events and instead uses methods to emit new states.
Every cubit requires an initial state which will be the state of the cubit before emit has been called. The current state of a cubit can be accessed via the state getter.
The cubit package is a collection of different packages for cubit such as cubit, flutter cubit, hydrated cubit, replay cubit, cubit test, and a cubit angular and all these have their own functionalities that they bring in the scenario.
In all these packages the main package cubit used if you have plain old dart project and want to use functionalities of cubit state management.
Flutter cubit
flutter cubit consists of all the functionalities of the main cubit package and also provides other different functionalities for different kinds of widgets and one important thing it also uses the functionalities of provider package.
Hydrated cubit
It persists and restores data in the hive database and you can get the data and read it out after you have restarted your application.
Replay cubit
It allows you to redo and undo certain states, for example, you if want to delete your data or want to retrieve it again.
Remaining two packages cubit test is used for testing the framework and cubit angular is used in the angular framework
“ However, All the packages are divided into different parts for the sake of Simplicity and Easiness but all are in the single Repository which makes it better in use for different purposes “
Implementation
First, we add the dependencies in pubspec.yaml file
flutter_cubit: replay_cubit: cubit_test:
you can add cubit packages(explained above) according to your need.
then we need to create a class that would extend cubit, as here in the given example we are creating a class CounterCubit which is extending the cubit package and it will notify the function when the state will be changed.
It works like provider class for changing state where emit() function notifies to the widget where we are changing states, same like changenotifier() does in provider
In the next step, we create CubitObserverClass() (optional) where we can observe transitions in our app or changes in states. We only need to extend the CubitObserver package, Here in this above code snippet, there are two methods increment and decrement, In which we have used that emit function which will increase and decrease the count of the value which we have defined in super().
Now you need to route class with CubitProvider() and then you need to mention your cubit class,
if you have multiple classes then you can also use Multipovider, it is same as we use in provider package so if you are already acquainted with provider then you must not face any issue here
so till now, we have created classes form where we can change states and observe them but till now we have not accessed states so for accessing states in cubit we need to use CubitBuilder(), it is like StreamBuilder() and FutureBuilder() and also consists same implementation technique.
Here in the above example, you can see we have wrapped our ListViewBuilder() by CubitBuilder() which will emit states when we will change it, as you can see states are being changed in FloatingActionButton() by calling increment and decrement functions mentioned in CounterCubit class.
Now are ready with Cubit State Management Technique, and you can see in the video how states of the list are changed
Conclusion
Cubit is a combination of the bloc and provider packages where you get riddance from events and rely on methods while you get ease in managing it as it helps to implement it with ease without any boilerplate code so till now it is one of the best combinations of the two state management techniques.
Trusted across industries like manufacturing, healthcare, logistics, BFSI, and smart cities, Aeologic combines innovation with deep industry expertise to deliver future-ready solutions.
Feel free to connect with us: And read more articles fromFlutterDevs.com.
FlutterDevs team of Flutter developers to build high-quality and functionally-rich apps. Hire flutter developer for your cross-platform Flutter mobile app project on an hourly or full-time basis as per your requirement! You can connect with us on Facebook, GitHub, Twitter, and LinkedIn for any flutter related queries.
Wewelcome feedback and hope that you share what you’re working on using #FlutterDevs. We truly enjoy seeing how you use Flutter to build beautiful, interactive web experiences!.
DevTools is a tooling suite for Flutter and Dart developers consisting of layout inspection tools, performance tools, memory tools & many other debugging tools that you need to be an efficient and effective Flutter developer, all bundled into a single web suite for you!
DevTools is a standalone suite of tools that run in the browser. They provide additional telemetry and functionality that aren’t practical to show in the IDE.
Ithas been rebuilt from scratch in Flutter! Let’s first take a moment to discuss why the Flutter team rebuilt DevTools in the first place. The short answer is productivity and quality. The Flutter team understands the productivity benefits of Flutter when building beautiful, high-performance UIs — and we want those benefits for ourselves. This productivity has not only to rebuild DevTools but also added big new features along the way!
What can I do with DevTools?
Here are some of things you can do with DevTools —
✅ Inspect the UI layout and state of a Flutter app.
✅ Diagnose UI jank performance issues in a Flutter app.
✅ CPU profiling for a Flutter or Dart app.
✅ Network profiling for a Flutter app.
✅ Source-level debugging of a Flutter or Dart app.
✅ Debug memory issues in a Flutter or Dart command-line app.
You can launch DevTools in VS Code, Android Studio, or even from Command Prompt.
VS Code
Step 1: Activate Debug session for your App
Step 2: Once the debug session is active and the application has started, the Dart: Open DevTools command becomes available in the VS Code command palette:
Step 3: The first time you run this (and subsequently when the DevTools package is updated), you are prompted to activate or upgrade DevTools.
Step 4: Click on open & it will launch the DevTools
Android Studio
Once an app is running, you can start DevTools using one of the following in Android Studio:
✔Select the Open DevTools toolbar action in the Run view.
✔Select the Open DevTools toolbar action in the Debug view. (if debugging)
✔Select the Open DevTools action from the More Actions menu in the Flutter Inspector view.
Let us now look at some of the features of DevTools —
Flutter Inspector
It is a tool that can be used to inspect the UI layout and state of a Flutter app. The inspector helps you visualize and explore Flutter widget trees, and can be used for the following:
✔ understanding existing layouts
✔ diagnosing layout issues
Widget Hierarchy Flutter Inspector
Layout Explorer
Lifesaver Feature
The next lifesaver feature is the Layout Explorer . You’ll see the Layout Explorer tab next to Details Tree. Select this tab to display the Layout Explorer feature.
The Layout Explorer visualizes how Flex widgets and their children are laid out. The explorer shows layout constraint violations and render overflow errors. These visualizations aim to improve understanding of why overflow errors occur as well as how to fix them.
Consider a case when due to a particular frame your app gets slower & you don’t know where to find that in your code. Timeline View becomes a lifesaver in such cases & is handy when you’re trying to find out which widgets, exactly, are behind a slow frame.
The Timeline view shows build times for each frame as well as a flame chart. This makes it easy to identify problematic frames while seeing them in context.
Frame Chart
You can see the problematic bar in red , selecting a bar from this chart centers the flame chart below on the timeline events corresponding to the selected Flutter frame. The events are highlighted with blue brackets.
Events
You can now view the event in your code which is making your app slower & modify your App’s code to make it faster !😍
Memory View
Memory pane lets you peek at how an isolate is using memory at a given moment. The Memory view lets you peek at how your app is using memory at a given moment. This view now shows a heatmap of the allocated memory, and allows tracking platform memory as well.
Memory View
Performance View
The performance view allows you to record and profile a session from your Dart or Flutter application. This can be used to decide where to spend optimization efforts!
Start recording a CPU profile by clicking Record. When you are done recording, click Stop. At this point, CPU profiling data is pulled from the VM and displayed in the profiler views (Call Tree, Bottom-Up, and Flame Chart).
Performance View
Network View
The network view allows you to inspect HTTP network traffic from your Dart or Flutter application.
HTTP traffic should be recorded by default when you open the Network page. If it is not, click the Record HTTP traffic button in the upper left to begin polling.
You can see the whole history of requests that your app made since it started and detailed information about each one. This frees you from having to log these events on your own when trying to debug a network issue.
Network View
Debugger
DevTools includes a full source-level debugger, supporting breakpoints, stepping, and variable inspection. This can be useful if you are not using an IDE for development but still want the option to add breakpoints, step through the code, peek at variable values, and so on.
Breakpoints
Summary
The rewrite of DevTools to Flutter has many benefits: increased productivity, walking in the shoes of our customers, and freedom of choice of target platforms.
Rebuilding DevTools in Flutter invites the community to contribute more easily. DevTools was always developed in the open, but today, most users will be familiar with its
Trusted across industries like manufacturing, healthcare, logistics, BFSI, and smart cities, Aeologic combines innovation with deep industry expertise to deliver future-ready solutions.
FlutterDevs team of Flutter developers to build high-quality and functionally-rich apps. Hire flutter developer for your cross-platform Flutter mobile app project on an hourly or full-time basis as per your requirement! You can connect with us on Facebook, GitHub, Twitter, and LinkedIn for any flutter related queries.
Wewelcome feedback and hope that you share what you’re working on using #FlutterDevs. We truly enjoy seeing how you use Flutter to build beautiful, interactive web experiences!.
In this blog, we shall discuss about the search feature using database and locally in our app. I will use both cloud firestore and realtime database to implement a search feature. This feature is a very common feature in production applications nowadays. It also enhances the app standard and make it more productive. It also saves the user time.
: It saves the time of the user to find any object/Item
: Provides transparency about the searched title
:: Improves the standard of the app
:: User-friendly, interactive, easy to use
Using cloud firestore
Here in this section, we will learn how to search for data on the cloud Firestore. First, we will create a collection of data on the cloud firestore, then we will use it to perform a search of items in our app.
Create a collection on cloud firestore
You can follow the instructions given in this blog to connect your app with Firebase and create a collection on the cloud firestore.
Here we are using to control our screen view if the user search any item then the keyword entered by the user is set to name the variable then if inside the item collection searchKeyword array contains the keyword entered by the users then the data related to it flows through the stream and displayed on the screen.
This is the stream that we will use to see the search item or items.
SearchDelegate is a pre-defined class inside the material.dart. This class provides us a predesigned search delegate. This class uses the following method to control the various operation to be performed to search for various items.
You can read about the method from the following link:
The search feature is very useful, we learned how to search for data using a search delegate it provides us a predefined architecture to perform searching easily and conveniently. We can also search for data from our database. The basic fundamental concept of both searches is the same.
I hope this article has provided you with content information about what’s all about the topic, and you will give it — a Try. Initiate using Search feature for your apps. !!!
Trusted across industries like manufacturing, healthcare, logistics, BFSI, and smart cities, Aeologic combines innovation with deep industry expertise to deliver future-ready solutions.
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FlutterDevs team of Flutter developers to build high-quality and functionally-rich apps. Hire flutter developer for your cross-platform Flutter mobile app project on an hourly or full-time basis as per your requirement! You can connect with us on Facebook, GitHub, Twitter, and LinkedIn for any flutter related queries.
Wewelcome feedback and hope that you share what you’re working on using #FlutterDevs. We truly enjoy seeing how you use Flutter to build beautiful, interactive web experiences!.
The mobile development market is rapidly gaining momentum in recent years. In 2019, it was expected that it will cover 2.5 billion users and more than 80 billion dollars with the prospect of further growth. Gradually, there have been formed three key niches, which are the development for Android, iOS, and cross-platform solutions, that determine the market further development. The latter emerged as a way to quickly create applications for both dominant platforms, sacrificing the power of native development. The most famous solutions in this area were PhoneGap by Adobe, Xamarin by Microsoft, React Native by Facebook. In 2017, Google joined the group by introducing its Flutter framework at the annual Google I/O Conference. In December 2018, the stable version of Flutter was released, which turned it from an experimental SDK into a fully suitable for a commercial development tool.
What’s Flutter Anyway?
Flutter was a startup initiated by YC in 2013, after which Google acquired it. It is an open-source framework that can develop cross-platform applications using one codebase. Hence Flutter Android development is very same as its IOS development. This makes the development of apps smooth, easy, and quick. The language used to code in flutter is Dart, developed by Google, and unique to Flutter.
Developers can also use platform-specific widgets to make their app have a native-developed feel to it. This will keep the end-user satisfied, and developers can save a lot of time and effort while developing. Besides all this, Flutter has a charming and flexible UI which contributes a lot to a user-friendly UX. All of these features make flutter a must use in app development. You can also say this Google Flutter is the new React Native.
Flutter Timeline
Flutter’s beta version was launched on 13th March 2018 and it was first to live on 4th December 2018. In such a short amount of time, Flutter has already established its position in the market. Let’s take a look at the graph below to understand the popularity of Flutter as compared to other mobile platforms.
Does Flutter Have Any Benefits?
There are a number of benefits that Flutter offers to the entrepreneurs that make them look ahead to app development using Flutter.
Free and open source
It’s an open-source project which makes it available for use and study by start-ups for any given purpose. It’s more or less like an open-collaboration, hence making it easily accessible and user friendly. It not only gives you a diverse scope for design but also no other company provides you with as many options
Amazing Widget catalog
The best part about flutter is that you have a wide range of widgets beautifully cataloged for you. Not only does it make it hassle-free but also helps you make a functionally amazing app. You use Dart to write your Flutter app which is compiled to native code. The IntelliJ plugin makes for good integration.
It’s Inherent Graphic Library
Flutter uses the Skia — built-in library for rendering. This makes it more platform-independent. The SDK provides a rich set of widgets, in particular, the Material and Cupertino collections for rendering native-like widgets for Android and iOS. By combining various widgets, you get the opportunity to create a complex UI. Thanks to its own library, Flutter applications look the same on different versions of operating systems. Thus it is good to solve one of the main problems of mobile development today — the great variability of mobile devices.
Hot Reload
One of the drawbacks of compiled languages before scripting languages is the loss of time for building a project. With frequent edits, it can take up a substantial part of the working time. The Flutter Hot Reload feature allows you to display the effect of your edits in the code immediately.
Compatibility
Since widgets are part of the app and not the platform, you’ll likely experience less or no compatibility issues on different OS versions. This in turn means less time spent on testing.
Development Expectations for Fuchsia OS
Flutter is currently the only tool for creating applications for the Fuchsia OS from Google. For several years now, the new operating system has aroused the interest of developers and questions about its purpose. Particularly ardent fans call it the “Android killer,” which should blur the line between mobile, desktop, and web development. At Google itself, the new operating system is evaluated more restrainedly — as a testing ground for testing new ideas and experiments. Nevertheless, with the further development of Fuchsia, development experience with Flutter will allow you to quickly master a new niche in the software development market.
We’ve talked about Flutter and Fuchsia’s combination in detail in our previous blog. Do check that out.
It Gives You Java Feels
Dart isn’t exactly like Java but has similar features. It makes it really easy for developers to make the shift. Flutter comes with a better widget, great editorial integrations, and easy to use features that make this kit a great option to develop apps.
That’s not it, this framework is loaded with benefits that enhance the experience of the app for any user as well for the developer building it, those are:
What Flutter Can’t Do: Limitations
Although Flutter seems to be the future of app development with its continuous development and over the top features, there are a few limitations of Flutter which are yet to be improved.
Lack of Third-Party Libraries and Widgets
Flutter is not too old unlike its contemporaries and lacks the presence of third-party libraries. Although, it gives an amazing UI package, yet the requirement of third-party libraries for extensive development is still awaited.
For example, it’s rather easy to find libraries for React Native than Flutter. Also, some widgets in Flutter are specific to one platform. This may make some developers move away from Flutter if what they need is not available for their target platform.
Code Pushing
Code push allows developers to instantly push patches to their apps without going through the usual app store release process.
Bugs can be fixed without a new release, allowing a more web-like continuous development process. It’s supported by React Native, Cordova, and Ionic. Flutter doesn’t support this.
TVs, Watches & Cars
You can’t use Flutter to build apps for tvOS, watchOS, CarPlay, or Android Auto. There’s some limited support for Wear OS (formerly Android Wear). Flutter has to add Bitcode support to deploy to tvOS and watchOS. You’ll have to use native code or an alternative framework to target these platforms.
Some Top Performing Application Built With Flutter
Flutter Showcase consists of a plethora of applications that are increasing in multiple folds each day with large enterprises trusting flutter for their large userbase apps shows the amount of trust that Flutter offers.
Of the hundereds of applications built, there are some apps that really stood out, like:
Reflectly:
Reflectly is a personal journal and diary driven by artificial intelligence to enable you to deal with negative thoughts, make positivity louder, and to teach you about the science of well-being. An award-winning mindfulness app built with Flutter. It was featured on the Apple App Store as an ‘app of the day’.
Having 1 Million+ downloads with a rating of 4.3 from over 30,000 users.
This is the official application for one of the famous award-winning Broadway musicals — Hamilton. It was built specifically for its large community of fans to stay updated with all music-related news.
The app offers, along with other things, a karaoke feature for those who want to sing along to their favorite songs, access to a number of different Hamilton lotteries, a daily trivia game. The user experience of the app is outstanding on both platforms.
Flutter was not always the same. We at FlutterDevs have been working on Flutter since it’s inception, its alpha release and we’ve seen Flutter and it’s community grow. There were a lot of challenges initially, which were resolved by the community itself.
Our experience of using Flutter as our driving technology for mobile app development has been phenomenal. We have been building apps for more than 10 years now, we have seen and used a lot of cross-platform frameworks. But need I say Flutter is hands-down the best cross-platform mobile app development framework. It
And as we discussed above in this article, there are some limitations and shortcomings with all the amazingness that this framework offers. One of the biggest limitations that we felt is that even though it’s one of the most popular cross-platform frameworks at this moment, we still have a limited developer community for Dart. But we know for a fact that it’s steadily growing.
Another big limitation that we came across is that it’s very hard to find plugins for a lot of 3rd party SDKs. In-turn, the developers have to create a plug-in specifically for the SDK and which will result in a lot of extra time and money from a client’s perspective as well.
Being said that, there is no doubt that Flutter is one of the best frameworks that we’ve ever worked on. Flutter takes fewer efforts, less time, and smaller investments for app development. The community behind flutter is smaller yet determined to set a higher standard of cross-platform development in 2020 and beyond.
Closing Thoughts
Flutter is hot in the market ever since Google announced the first stable release. Looking at the features of Flutter, lots of questions arise. Will companies go for Flutter as the first choice of developing apps? Is it the beginning of the end of the native Android app development? Will Dart replace Java and Kotlin? Should native Android developers start learning Dart?
We’ll make no predictions or guesses here, but it could be the alarming bell for native mobile app developers that something like Flutter might affect their role in the future.
Love Flutter or hate Flutter, you cannot ignore it anymore.
Trusted across industries like manufacturing, healthcare, logistics, BFSI, and smart cities, Aeologic combines innovation with deep industry expertise to deliver future-ready solutions.
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FlutterDevs team of Flutter developers to build high-quality and functionally-rich apps. Hire flutter developer for your cross-platform Flutter mobile app project on an hourly or full-time basis as per your requirement! You can connect with us on Facebook, GitHub, Twitter, and LinkedIn for any flutter related queries.
Wewelcome feedback and hope that you share what you’re working on using #FlutterDevs. We truly enjoy seeing how you use Flutter to build beautiful, interactive web experiences.
The spell checker system is for the most part upheld by engines for the web and applications. For instance, as in the web with HTML, we have identified quality spellcheck for editable labels. With iOS or Android local, they additionally have spellCheckingType or Spell checker framework. However, not in Flutter, they’re setting spell checkers as a to-do for both the web and application.
This blog will explore the Spell Checker System In Flutter.We perceive how to execute a demo program. We will show you how to do a simple spell-checker system that can work well for your flutter applications.
A spell checker is significant since your application has an editable text form. Furthermore, you would rather not depend on yourself while composing to accept that there are no mistakes. Then, having a spell checker can assist you a ton with incorrectly spelled words.
Demo Module ::
This demo video shows how to create the spell checker system in flutter and shows how a spell checker system will work in your flutter applications. We will show a user a spell checker that can help her find incorrect words. It will be shown on your devices.
Code Implement:
You need to implement it in your code respectively:
Create a new dart file called custom_text_editing_controller.dart inside the lib folder.
If you investigate the document for TextStyle, you can see there’s a segment where they referenced making a wavy red underline for black text. Along these lines, you can set the text style for each by switching over completely to TextSpan.
Here we go, we want to extend a custom TextEdittingController, I’ll call it CustomTextEdittingController, and give it a property listErrorTexts to store every one of the words that need a red underline on it.
Presently, you want to override the buildTextSpan technique by actually looking at listErrorTexts. On the off chance that your text matches any in listErrorTexts, give it a custom style. I utilized splitMapJoin controlled by Dart language to plan them into various TextSpans.
import 'package:flutter/material.dart';
class CustomTextEditingController extends TextEditingController { final List<String> listErrorTexts; CustomTextEditingController({String? text, this.listErrorTexts = const []}) : super(text: text);
Create a new dart file called list_english_words.dart inside the lib folder.
For the word reference, you can utilize this list_english_words however for my purposes, that package has an excessive number of words (~380k words) and many are repetitive for the standard English language. So I got my rundown which is just about ~84k words. Yet, I will show you a few words.
Create a new dart file called home_page.dart inside the lib folder.
First, we will add two final List<String> listErrorTexts and listTexts are equal to the square bracket. Also, we will add CustomTextEditingController was _controller.
We will create an initState() method. In this method, we will add _controller is equal to the CustomTextEditingController(listErrorTexts: listErrorTexts)
The thought is straightforward, each time you type the word and hit the space, then you check for the word just before it. On the off chance that it is incorrectly spelled, add it to listErrorTexts, if not you’ll, in any case, have to save it in a stored array so when this word shows up again you don’t have to query in the word reference any longer.
I made a TextFormField widget in a different file and a capability called handleSpellCheck relegated to the onChange event of TextFormField.
In the body, we should wrap your TextFormField with a Focus widget to recognize whether the client’s mouse has lost focus. One more, It’s more helpful on the off chance that you carry out a custom TextFormField and can re-use it anyplace. Then you want to allocate the default value to your CustomTextEdittingController in initState().
In the article, I have explained the Spell Checker System structure in a flutter; you can modify this code according to your choice. This was a small introduction to Spell Checker System User Interaction from my side, and it’s working using Flutter.
I hope this blog will provide you with sufficient information on Trying the Spell Checker System in your flutter projects. We will show you what the Introduction is and make a demo program for working with Spell Checker System in your flutter applications. So please try it.
❤ ❤ Thanks for reading this article ❤❤
If I got something wrong? Let me know in the comments. I would love to improve.
Trusted across industries like manufacturing, healthcare, logistics, BFSI, and smart cities, Aeologic combines innovation with deep industry expertise to deliver future-ready solutions.
Feel free to connect with us: And read more articles fromFlutterDevs.com.
FlutterDevs team of Flutter developers to build high-quality and functionally-rich apps. Hire a flutter developer for your cross-platform Flutter mobile app project on an hourly or full-time basis as per your requirement! For any flutter-related queries, you can connect with us on Facebook, GitHub, Twitter, and LinkedIn.
Wewelcome feedback and hope that you share what you’re working on using #FlutterDevs. We truly enjoy seeing how you use Flutter to build beautiful, interactive web experiences.
In Flutter there are various features that make you app rich in functionality and provide ease to the user to do stuff within the app and get better user experience and being a service provider it is also necessary for developers.
These small but important functionalities like picking up contacts from the contact list, images, and videos from the gallery, opening maps, automatic OTP recognition, are some important features that make any app comfortable to use and in this article, we are going to explain a simple but important functionality named pdf viewer.
There are different packages which you can use to open a pdf in your app some are a bit complicated and some are easy to implement and here I am going to explain one of the easiest ways to use it.
Implementation:
For this, you just need to add the dependencies in your pubspec.yaml file
pdf_flutter: file_picker:
After adding dependencies you have different options to use it, It depends, from where you want to access your pdf like from assets, from your phone storage, or by any link(from server).
So let’s see all methods of accessing pdf from different locations
From asset Folder
From the asset folder, you can easily access your pdf file if you have mentioned it in your pubspec.yaml file. Here you are also required to mention placeholder in case of unavailability of resources.
Some times you need to access pdf from your phone especially in the case when you are posting any document in the server. The only thing which is different from the above code is PDF.file and but as we are picking it up from phone so we need to add the dependency of file_picker then we need to create an instance of the file picker
File localFile;
and then it will allow you to access your phone directory
Accessing pdf file is quite the same as the two mentioned methods you only need to use PDF.network and need to provide the link and this will show the pdf on your device
There are different Pdf viewer plugins are available here but this one is the simplest among them because in this plugin you get riddance from all kinds of long and lengthy code, this is the simplest way to view pdf in a flutter.
Thanks for reading this article if you find anything that could be improved please let me know, I would love to improve.💙
If this article has helped you a bit and found interesting please clap!👏
Trusted across industries like manufacturing, healthcare, logistics, BFSI, and smart cities, Aeologic combines innovation with deep industry expertise to deliver future-ready solutions.
Feel free to connect with us: And read more articles fromFlutterDevs.com.
FlutterDevs team of Flutter developers to build high-quality and functionally-rich apps. Hire flutter developer for your cross-platform Flutter mobile app project on an hourly or full-time basis as per your requirement! You can connect with us on Facebook, GitHub, Twitter, and LinkedIn for any flutter related queries.
Wewelcome feedback and hope that you share what you’re working on using #FlutterDevs. We truly enjoy seeing how you use Flutter to build beautiful, interactive web experiences!.
