Widget Layer with provider: Flutter

September 23, 2021 Publish By : EXPERT APP DEVS 4 min read Viewed By : 934
widget layer with provider

Flutter supported multiple widget like:

  • Animation and motion widgets
  • Accessibility widgets
  • Assets, images, and icon widgets
  • Async widgets
  • Cupertino (iOS-style) widgets
  • Input widgets
  • Layout widgets
  • Material Components widgets
  • Painting and effect widgets
  • Scrolling widgets
  • Styling widgets
  • Text widgets
  • Basic widgets

Dart is used in flutter programming language and is useful for developing flutter apps.

  • To develop flutter apps using the widgets, the flutter developer needs to have the knowledge of how to use different kinds of widgets in the application according to its usability and features.
  • Flutter app development is totally based on mixed-use of flutter widget. Flutter development is not possible without widgets.
  • Here are the different types of flutter widgets that are used by most of the flutter app development companies.
  • Layout widgets are the most common in flutter app development. This is providing all types of facilities including managing content on-screen using alignment, aspect ratio, center, padding, etc properties
  • Animation widget is the most used of all apps so Flutter app development company expects the flutter developer to know the common widget like material components.
  • Sometimes applications look and feel very good because the app uses custom paint that is defined inside flutter programming language already.
  • After the demand for flutter so flutter app development company has started the flutter app development.

Let's introduce the provider package!

  • The provider is a package created by Roselgit. A simple application used in Flutter has been recommended by Google as a component for state management. Previously, they recommended the BLoC pattern. Here is the most famous package made by Flannel. The provider is a convenient wrapper on the InheritedWidget, which significantly improves the functionality with the data we transfer through the tree of widgets.
  • In my opinion, the very important feature of this component is the unified initialization and the ability to recover data from an inherited widget. many developers should keep in mind that what they have written can be used by another developer and therefore, the code should be at some level commonly used and written in respectable standards.
  • Clean code is also a well-known code. That’s why we build our projects with battle-tested architectures, as well as design patterns, and stick to code standards like effective dart style guides.

So what is a provider?

In short, the provider is like a way of using an inherited widget that humans can understand.

The provider looks desperate when you first dig into it. I mean, the classes you can use to create the word cloud:

How does the provider work?

  • I will now describe the flow of the provider. If you prefer documentation, just go there in a friend and you can leave this paragraph. We place the provider (as a subclass of inherited widgets) in the widget tree and declare the declared budget to be provided.
  • In the next step, we simply retrieve the ret budget provided from the context with some reference extension methods defined by the package.
  • With these methods, we can refresh the view only when the desired area of ​​the observable object has changed.

Just this. You have three jobs, and everyone in that class can do one of them. Whose classes you use will depend on what you required to do in your situation

Notifiers:

This handle indicates to providers that something has changed. What you use will depend on what you are trying to hear ChangeNofire is going to report any changes to the class, as it is fully tracking the budget. You can use any of these with any one type/mode/object.

ChangeNotifier

[Changenotifier] optimized for a few numbers of listeners (one or two). "- change_notifier.dart.

The Changnotifier uses the NotifierListeners function when changes are made to the class/model/ object budget.

ValueNotifier

“A [changenotifier] that has the same value. When the [value] parity is change by something that is not the same as the value evaluated by the operator ==, it notifies its listeners of this class. "

Other Providers include:

  • StreamProvider
  • FutureProvider
  • ListenableProvider (the superclass of ChangeNotifierProvider)
  • ValueListenableProvider (To hear a value instead of the whole type

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