Loading effect in flutter

Loading effect in a flutter

 The Loading effect, also known as a loading spinner or progress indicator, is a common feature in mobile app development. In Flutter, the CircularProgressIndicator widget can be used to create a loading effect. This widget is part of the flutter:widgets library and can be easily added to any project using the pub.dev package manager.

To add the CircularProgressIndicator widget to your Flutter project, you will first need to add the flutter:widgets library to your pubspec.yaml file. This file is located in the root directory of your project and contains all of the dependencies for your project. To add the flutter:widgets library, you can simply add the following line to your pubspec.yaml file:

dependencies:

  flutter:

    sdk: flutter

  flutter_widgets: ^0.0.1

Once you have added the flutter_widgets library to your project, you can import the CircularProgressIndicator widget into your code and use it to create a loading effect. For example, you can use the following code to add a loading effect to a Scaffold widget:

import 'package:flutter/material.dart';

class MyApp extends StatelessWidget {

  @override

  Widget build(BuildContext context) {

    return Scaffold(

      body: Center(

        child: CircularProgressIndicator(),

      ),

    );

  }

}

In this example, the CircularProgressIndicator widget is being used as the child of a Center widget, which is itself being used as the child of the Scaffold widget. This will center the loading effect on the screen.

You can also customize the appearance of the CircularProgressIndicator widget by using the various properties that it provides. For example, you can use the backgroundColor property to change the background color of the loading effect, or the valueColor property to change the color of the spinning circle. Here is an example of how you can use these properties to customize the appearance of the CircularProgressIndicator widget:

import 'package:flutter/material.dart';

class MyApp extends StatelessWidget {

  @override

  Widget build(BuildContext context) {

    return Scaffold(

      body: Center(

        child: CircularProgressIndicator(

          backgroundColor: Colors.grey[200],

          valueColor: AlwaysStoppedAnimation<Color>(Colors.blue),

        ),

      ),

    );

  }

}

In this example, the background color of the loading effect is being set to grey, and the color of the spinning circle is being set to blue.

Additionally, you can also use CircularProgressIndicator with the LinearProgressIndicator widget which is also similar to CircularProgressIndicator but it shows the progress in a linear way.

import 'package:flutter/material.dart';

class MyApp extends StatelessWidget {

  @override

  Widget build(BuildContext context) {

    return Scaffold(

      body: Center(

        child: LinearProgressIndicator(

          backgroundColor: Colors.grey[200]