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Guide à l'implémentation de l'architecture BLoC dans Flutter

Guide à l’implémentation de l’architecture BLoC dans Flutter

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Découvrez comment implémenter facilement l’architecture BLoC dans Flutter avec ce guide pratique ! Apprenez à créer des applications plus robustes et plus faciles à maintenir.

## Flutter : Un Cadre de Développement d’Applications Mobiles Open-Source Très Populaire Créé par Google

Le logiciel Flutter est un cadre de développement d’applications mobiles open source très populaire créé par Google. Il permet aux développeurs de créer des applications mobiles, web et de bureau natives à partir d’une seule base de code.

Selon le dernier sondage mené par Google, plus de 50 % des développeurs Flutter ont utilisé le cadre depuis moins d’un an. Près de 90 % ont déclaré être «satisfaits» ou «très satisfaits» de Flutter. De plus, Flutter a été reconnu comme un cadre à hautes performances en matière de satisfaction et d’adoption des développeurs par de nombreux rapports de l’industrie, tels que les «résultats du sondage des développeurs 2020» de Stack Overflow et le rapport «Cadres de développement d’applications mobiles 2021» de GoodFirms.

Flutter offre aux développeurs une variété d’outils et de fonctionnalités pour faciliter le développement d’applications mobiles. Il comprend un kit de développement logiciel (SDK) qui comprend des bibliothèques, des outils et des composants pour créer des applications natives pour iOS et Android. Il offre également des outils pour le développement Web, tels que le navigateur Web Flutter, qui permet aux développeurs de créer des applications Web à partir du même code source que les applications mobiles.

Flutter offre aux développeurs une variété d’outils et de fonctionnalités pour faciliter le développement d’applications mobiles. Il comprend un kit de développement logiciel (SDK) qui comprend des bibliothèques, des outils et des composants pour créer des applications natives pour iOS et Android. Il offre également des outils pour le développement Web, tels que le navigateur Web Flutter, qui permet aux développeurs de créer des applications Web à partir du même code source que les applications mobiles. De plus, Flutter propose une variété de widgets personnalisables qui peuvent être utilisés pour créer des interfaces utilisateur riches et intuitives. Les widgets sont conçus pour être facilement personnalisables et réutilisables, ce qui permet aux développeurs de créer rapidement des applications à l’aspect professionnel.

Enfin, Flutter est livré avec un ensemble complet d’outils de débogage et de tests pour aider les développeurs à tester et à déboguer leurs applications. Les outils comprennent un débogueur intégré, un simulateur mobile intégré et un ensemble d’outils de test automatisés. Ces outils permettent aux développeurs de tester facilement leurs applications et d’identifier rapidement les bogues avant la mise en production. En outre, Flutter est entièrement compatible avec les principaux systèmes d’exploitation mobiles, ce qui permet aux développeurs de publier facilement leurs applications sur les magasins d’applications respectifs.

En résumé, Flutter est une plateforme de développement d’applications mobile très populaire et puissante qui offre aux développeurs une variété d’outils et de fonctionnalités pour faciliter le développement d’applications mobiles. Les outils intégrés, tels que le SDK, le navigateur Web Flutter et les widgets personnalisables, permettent aux développeurs de créer rapidement des applications à l’aspect professionnel. De plus, Flutter est livré avec un ensemble complet d’outils de débogage et de tests pour aider les développeurs à tester

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Why Is the Flutter Framework Better Than React Native?

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Flutter is a new framework for developing mobile apps that promise to be faster and more efficient than React Native. But what exactly is Flutter, and how does it compare to React Native?

Flutter is a mobile app SDK that allows developers to create high-quality native apps for both iOS and Android. Flutter uses the Dart programming language, which is similar to JavaScript, but with some important differences.

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Old Habits Die Hard, But Getting New Ones is Essential. Tips on Getting the Most Out of TypeScript

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In web development, no one is surprised when a new framework or library enters the stage. Implementing complex functionalities and creating UI elements from scratch only using the powers of a specific programming language is not always the most optimal way. Instead, developers either rely on the existing frameworks or create their own for internal use. In the case of programming languages, the situation is a little more complicated.

A fairly large number of coders are unhappy with the limitations of the programming language that they use every day. Therefore, from time to time, we can hear about the new programming language release. The question is, will the development community adopt it as a replacement for well-established technologies? As an example, we can take a look at Dart. It was initially released in 2011 but remained quite unpopular until the Flutter framework was launched in 2017.

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Exciting New Tools for Designers, September 2021

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Since school is back in session, this month’s roundup has a learning focus. In addition to tools, many of the resources include guides, tutorials, and cheat sheets to help make design work easier.

Here’s what’s new for designers this month.

ScrollingMockup.io

ScrollingMockup.io generates high-definition, animated scrolling mockups in minutes. All you have to do is paste your website URL, select from the expanding template gallery, add some music and post. You can create three mockups for free, and then this tool comes with a subscription model. The paid model allows for custom branding for mockups and more.

FilterSS

FilterSS is a curated collection of CSS image filters for use in projects. Upload an image, sort through the list, and then copy the code for the filter you want to use. It’s that easy!

Buttons Generator

Buttons Generator is a fun tool with so many button options in one place. Choose from three-dimensional, gradient, shadow borders, neumorphic, retro, animated, ghost, with arrows, and more all in one place. Click the one you like, and the code is copied right to your clipboard and ready to use in projects.

UI Cheat Sheet: Spacing Friendships

UI Cheat Sheet: Spacing Friendships is a fun – and memorable approach to figuring out spacing. This guide shows how close or far away elements should be based on “friend” circles with a couple of relatable instances. It’s one of the most relatable examples of this concept out there while emphasizing the importance of spacing in design.

PrettyMaps

PrettyMaps is a minimal Python library that allows you to draw customized maps from OpenStreetMap data. This tool can help you take online map design to the next level with cool, unique map visuals. It’s based on osmnx, matplotlib, shapely, and vsketch libraries.

Card.UX/UI

Card.UX/UI is a card-style generator with more than 20 templates and elements to create custom cards. Use the on-screen tools to design it the way you want and then copy the code for easy use.

Couleur.io

Couleur.io is a simple color palette builder tool that lets you pick a starting color and build a scheme around it. One of the best elements of the tool might be the quick preview, which shows your choices using the palette in context and in dark mode. Get it looking the way you want, and then snag the CSS to use in your projects.

CSS Accent-Color

CSS Accent-Color can help you tint elements with one line of CSS. It’s a time-saving trick that allows for greater customization for your brand in website design projects. Plus, it works equally well in dark or light color schemes. It supports checkboxes, radio, range, and progress bars.

Vytal

Vytal shows what traces your browser leaves behind while surfing the web. This scan lets you understand how easy it is to identify and track your browser even while using private mode. In addition, it scans for digital fingerprints, connections, and system info.

Imba

Imba is a programming language for the web that’s made to be fast. It’s packed with time-saving syntax tags and a memorized DOM. Everything compiles to JavaScript, works with Node and npm, and has amazing performance. While the language is still in active development, the community around it is pretty active and growing.

SVG Shape Dividers Creator

SVG Shape Dividers Creator is a tool that allows you to create interesting shapes with SVG so that your colors and backgrounds aren’t always rectangles. You can adjust and side, change the color, axis, and flip or animate it. Then snag the CSS, and you are ready to go.

Image Cropper

Image Cropper is a tool that allows you to crop and rotate images using the flutter plugin. It works for Android and IOS.

Noteli

Noteli is a CLI-based notes application that uses TypeScript, MongoDB, and Auth0. The tool is just out of beta.

Yofte

Yofte is a set of components for Tailwind CSS that help you create great e-commerce stores. The UI Kit is packed with components with clean and colorful designs that are customizable. The code is easy to export and clean. This premium kit comes with a lifetime license or a monthly plan.

UI Deck

UI Deck is a collection of free and premium landing page templates, themes, and UI kits for various projects. This is a premium resource with paid access to all of the tools. It includes access to more than 80 templates.

Star Rating: An SVG Solution

Star Rating: An SVG Solution is a tutorial that solves a common design dilemma: How to create great star rating icons for pages. This code takes you through creating an imageless element that’s resizable, accessible, includes partial stars, and is easy to maintain with CSS. It’s a great solution to a common design need.

Designing Accessible WCAG-Compliant Focus Indicators

Designing Accessible WCAG-Compliant Focus Indicators is another convenient guide/tutorial for an everyday application. Here’s why it is important: “By designing and implementing accessible focus indicators, we can make our products accessible to keyboard users, as well as users of assistive technology that works through a keyboard or emulates keyboard functionality, such as voice control, switch controls, mouth sticks, and head wands, to mention a few.”

Blockchain Grants

Blockchain Grants is a tool for anyone developing blockchain applications and in need of funding. It’s a database of grants from a variety of organizations for different applications. Start looking through this free resource to help secure additional funding for your projects.

Basement Grotesque

Basement Grotesque is a beautiful slab with a great heavy weight and plenty of character. There are 413 characters in the set with plenty of accents, numbers, and variable capitals.

Gadimon

Gadimon is a fun, almost comic book-style layered script. The font package includes a regular and extrude style.

Lagom

Lagom is a sleek and functional serif typeface with 16 styles in the robust family from ultralight to extra bold italic. It’s readable and has a lot of personality.

Striped Campus

Striped Campus fits our back-to-school theme with a fun, scholastic look and feel. The block letters have a thick outline stroke and some fun inline texture.

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The post Exciting New Tools for Designers, September 2021 first appeared on Webdesigner Depot.


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Flutter 2.0 State Management Introduction With Provider 5.0

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With Flutter 2.0, you can build apps on mobile, web and desktop.  Graphics performance is fantastic and the development tools are great. The main barrier to learning Flutter is an understanding of state management.  This tutorial covers the Provider package, one of the most popular and easiest tools to manage state in Flutter.

A video version of this tutorial is available. Code and image files are on GitHub. 

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12 Best Google Design & Development Tools

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Google resembles an iceberg: there’s the part above the water we can see and use everyday; there’s also the part beneath the water, that we don’t see and know little about.

While many of us are concerned about the aspects of Google we don’t see — the parts that threaten our privacy, or monopolize the web — there’s no denying that Google offers some amazing products and tools, many of them free, all from the convenience of a single login.

Today we’re going to take a look at 12 tools from Google that really do bring something positive to the table.

1. Polymer

Polymer is an open-source JavaScript library from Google for building web applications using Web Components. The platform comes with a ton of libraries and tools to help designers and developers unlock the web’s potential by taking advantage of features like HTTP/2, Web Components, and Service Workers. 

The main feature of Polymer is Web Components. With Web Components, you can share custom elements to any site, work seamlessly with any browser’s built-in elements, and effectively use frameworks of all kinds. Products like LitElement (a simple base class for creating fast, lightweight web components) and PWA Starter Kit make Polymer easy to use. If you like, you can build your app entirely out of Web Components.

2. Lighthouse

Google Lighthouse is an open-source, automated tool for improving the quality of web pages. The software allows you to audit web pages for performance, SEO, accessibility, and more. You can run Lighthouse using ChromeDevTools, directly from the command line, or as a Node module. 

To use Lighthouse in Google Chrome, just go to the URL you want to audit (you can audit any URL on the web), open ChromeDevTools, and click the Audits tab. After you have run the audit, Lighthouse will give you an in-depth report on the web page. 

With these reports, you will see which parts of your web page you need to optimize. Each report has a reference doc that explains why that audit is important and also shows you the steps you can take to fix it. 

You can also use Lighthouse CL to prevent regression on your sites. Using Lighthouse Viewer, you can view and share reports online. You can also share reports as JSON or GitHub Gists. 

Lighthouse also comes with a feature called Stack Packs that allows Lighthouse to detect what platform a site is built on. It also displays specific stack-based recommendations.

3. Google Analytics

Google Analytics is the gold standard of analytics services. Google analytics can be installed on your site for free with a small amount of JavaScript and allows you to see all kinds of details about your site visitors, like what browser they’re using, and where they’re from.

By using Google Analytics you can make decisions about your site based on science, and therefore be somewhat confident that the decisions you make will result in the outcome you are expecting.

4. Flutter

Flutter is Google’s UI toolkit for building natively compiled applications for mobile, web, and desktop from a single codebase. The toolkit is open source and free to use. The best part of Flutter is that it works with existing code. 

The toolkit has a layered architecture that allows for full customization, which results in fast rendering and flexible designs. It also comes with fully-customizable widgets that allow you to build native interfaces in minutes. With these widgets, you will be able to add platform features such as scrolling, navigation, icons, and fonts to provide a full native performance on both iOS and Android.

Flutter also has a feature called hot reload that allows you to easily build UIs, add new features, and fix bugs faster. You can also compile Flutter code to native ARM machine code using Dart native compilers. 

5. Google API Explorer

Google has a huge library of APIs that are available to developers but finding these APIs can be difficult. Google API Explorer makes it easy for developers to locate any API. On the Google API Explorer web page, you will see a complete list of the entire API library. You can easily scroll through the list or use the search box to filter through the API list. 

The best part of Google API Explorer is that each link to a reference page comes with more details on how to use the API. API Explorer is an excellent way to try out methods in the Monitoring API without having to write any code.

6. Puppeteer

Puppeteer is a project from the Google Chrome team. The platform enables web developers to control a Chrome (or any other Chrome DevTools Protocol based browser) and execute common actions, much like in a real browser. Puppeteer is also a Node library and it provides a high-level API for working with headless Chrome. It is also a useful tool for scraping, testing, and automating web pages. 

Here are some things you can do with Puppeteer: generate screenshots and PDFs of pages, UI testing, test Chrome Extensions, automate form submission, generate pre-rendered content, and crawl Single-Page Applications. 

7. Codelabs

Google Developer Codelabs is a handy tool for beginner developers and even advanced developers who want to improve their knowledge. Codelabs provide a guided, tutorial, hands-on coding experience. Codelabs’ site is broken down into several tutorial sessions on different topics. 

With the tutorials on Codelabs, you can learn how to build applications from scratch. Some of the tutorial categories include Augmented reality, TensorFlow, Analytics, Virtual Analytics, G Suite, Search, Google Compute Engine, and Google APIs on iOS. 

8. Color Tool

Color Tool makes it easy for web designers to create, share, and apply colors to their UI. It also measures the accessibility level for any color combination before exporting to the palette. The tool comes with 6 user interfaces and offers over 250 colors to choose from. 

The tool is also very easy to use. All you need to do is pick a color and apply it to the primary color scheme; switch to the secondary color scheme, and pick another color. You can also switch to Custom to pick your own colors. After you have selected all your colors, use the Accessibility feature to check if all is good before exporting it to your palette. 

9. Workbox

Workbox is a set of JavaScript libraries and Node modules. The JavaScript libraries make it easy to add offline support to web apps. The Node modules make it easy to cache assets and offer other features to help users build Progressive Web Apps. Some of these features include pre-caching, runtime caching, request routing, background sync, debugging, and greater flexibility than sw-precache and sw-toolbox. 

With Workbox, you can add a quick rule that enables you to cache Google fonts, images, JavaScript, and CSS files. Caching these files will make your web page to run faster and also consume less storage. You can also pre-cache your files in your web app using their CLI, Node module, or webpack plugin. 

10. PageSpeed Insights

PageSpeed Insights is a handy tool from Google Developers that analyzes the content of a web page, then generates suggestions on how to make the page faster. It gives reports on the performance of a web page on both desktop and mobile devices. At the top of the report, PageSpeed Insights provides a score that summarizes the page’s performance. 

11. AMP on Google

AMP pages load faster and also look better than standard HTML pages on mobile devices. AMP on Google allows you to enhance your AMP pages across Google. It is a web component framework that allows you to create user-first websites, ads, emails, and stories. One benefit of AMP is that it allows your web pages to load almost instantly across all devices and platforms hence improving the user’s experience. 

12. Window Resizer

When creating websites, it is important that developers test them for responsive design – this is where Window Resizer comes in. Window Resizer is a Chrome extension that resizes the browser window so that you can test your responsive design on different screen resolutions. The common screen sizes offered are desktop, laptop, and mobile, but you can also add custom screen sizes. 

 

Featured image via Unsplash.

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Flutter vs. React Native App Development: Who Will Win the Race?

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In order to create a good mobile application, you need to choose a fully-fledged platform and an appropriate SDK toolkit. Both React and Flutter have amazing features allowing you to craft beautiful and multi-functional apps. However, the choice between those two depends on what exactly you are planning to create. Let’s compare the programming possibilities of React and Flutter, their communities, and famous supporters.

Flutter Toolkit for Mobile App Development

Flutter’s history dates back to 2014 when, in pursuit of speed, the Google Chrome team experimented with rendering page content. The purpose of the experiment was to check if it is possible to speed up the rendering when abandoning the traditional layout model. At the same time, the team wanted to get rid of the backward compatibility burden that has accumulated across many years of the web’s existence. The basis for the experiments was the Blink engine, and the result was a 20-fold increase in productivity due to the following changes:

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