Jade Bird

Jade Bird

1656665297

Put Flutter to Work: A Flutter add-to-app Demo You Can Try with Your Apps

Put Flutter to Work 🏠

This project is a demo intended to help people test drive Flutter by integrating it into their existing applications.

Included in this repo is a Flutter add-to-app module, which contains the UI and logic for displaying a popup to capture user feedback (a "net promoter score"). Alongside the module are three newsfeed applications for iOS, Android, and web, built with SwiftUI, Kotlin, and Angular, respectively.

The applications demonstrate how to import a Flutter module and display it using native platform code. If you're looking to learn, for example, how to wire up a UI element in Swift to navigate to content displayed with Flutter, the iOS newsfeed app can show you.

If you'd like to try Flutter in your own applications, you can download a prebuilt copy of the Flutter module for Android, iOS, or web from this repo, and follow the instructions below to integrate it into your own apps. Note that you don't need the Flutter SDK installed on your development machine for these to work!

Downloading and using the pre-compiled Flutter module

iOS

Full instructions for adding a module to an existing iOS app are available in the add-to-app documentation at flutter.dev, but you can find the short version for both Swift and Objective-C below.

Link the Flutter module into your application

Download a recent framework build of the Flutter module from this repo.

Unzip the archive into the root of your project directory. It will create a directory there called flutter-framework containing the compiled Flutter module.

Open the flutter-framework/Release directory and drag App.xcframework and Flutter.xcframework to the General > Frameworks, Libraries, and Embedded Content section of your app target in Xcode.

Update your app's code to show Flutter

Once the Flutter module is linked into your application, you're ready to fire up an instance of the Flutter engine and present the Flutter view controller.

Swift

In AppDelegate.swift, add the following three lines marked as "NEW":

import UIKit
import Flutter // NEW!

@UIApplicationMain
class AppDelegate: FlutterAppDelegate {
  lazy var flutterEngine = FlutterEngine(name: "my flutter engine")  // NEW!

  override func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
    flutterEngine.run();  // NEW!
    return super.application(application, didFinishLaunchingWithOptions: launchOptions);
  }
}

Then, in a ViewController class somewhere in your app, call these three lines of code to present the Flutter module's UI:

let flutterEngine = (UIApplication.shared.delegate as! AppDelegate).flutterEngine
let flutterViewController =
    FlutterViewController(engine: flutterEngine, nibName: nil, bundle: nil)
present(flutterViewController, animated: true, completion: nil)

For a demo, it's usually best to call these in response to a UI event like a button press. Once they're executed, the net promoter score UI will appear in your app!

Objective-C

In AppDelegate.h, add this import:

@import Flutter;

and this property to the AppDelegate interface:

@property (nonatomic,strong) FlutterEngine *flutterEngine;

Next, in AppDelegate.m, add these two lines to didFinishLaunchingWithOptions:

  self.flutterEngine = [[FlutterEngine alloc] initWithName:@"my flutter engine"];
  [self.flutterEngine run];

Then, somewhere in a UIViewController class in your app, @import Flutter and call these lines of code:

FlutterEngine *flutterEngine =
    ((AppDelegate *)UIApplication.sharedApplication.delegate).flutterEngine;
FlutterViewController *flutterViewController =
    [[FlutterViewController alloc] initWithEngine:flutterEngine nibName:nil bundle:nil];
[self presentViewController:flutterViewController animated:YES completion:nil];

For a demo, it's usually best to call these in response to a UI event like a button press. Once they're executed, the net promoter score UI will appear in your app!

Android

Full instructions for adding a module to an existing Android app are available in the add-to-app documentation at flutter.dev, but you can find the short version for both Kotlin and Java below.

Import the Flutter module into your app's codebase

First, download a recent aar build of the Flutter module from this repo. Then, create a directory in the root of your project called flutter and unzip the archive into that directory.

Next, add the following entries to the repositories and dependencies sections to your app/build.gradle file:

repositories {
  // Add these two maven entries.
  maven {
    url '../flutter'
  }
  maven {
    url 'https://storage.googleapis.com/download.flutter.io'
  }
}

dependencies {
  // Add these three entries.
  debugImplementation 'com.example.flutter_module:flutter_debug:1.0'
  profileImplementation 'com.example.flutter_module:flutter_profile:1.0'
  releaseImplementation 'com.example.flutter_module:flutter_release:1.0'
}

Update your app's code to show Flutter

Once the Flutter module is linked into your application, fire up an instance of the Flutter engine and present the Flutter Activity.

Kotlin

In your app's Application class, add a property for a Flutter engine:

lateinit var flutterEngine : FlutterEngine

In onCreate, instantiate and cache a running Flutter engine with this code:

// Instantiate a FlutterEngine.
flutterEngine = FlutterEngine(this)

// Start executing Dart code to pre-warm the FlutterEngine.
flutterEngine.dartExecutor.executeDartEntrypoint(
  DartExecutor.DartEntrypoint.createDefault()
)

// Cache the FlutterEngine to be used by FlutterActivity.
FlutterEngineCache
  .getInstance()
  .put("my_engine_id", flutterEngine)

Then, in an Activity class somewhere in your app, call these four lines of code to launch the Flutter module's UI:

startActivity(
  FlutterActivity
    .withCachedEngine("my_engine_id")
    .build(this)
)

For a demo, it's usually best to call these in response to a UI event like a button press. Once they're executed, the net promoter score UI will appear in your app!

Java

In your app's Application class, add a property for a Flutter engine:

public FlutterEngine flutterEngine;

In onCreate, instantiate and cache a running Flutter engine with this code:

// Instantiate a FlutterEngine.
flutterEngine = new FlutterEngine(this);

// Start executing Dart code to pre-warm the FlutterEngine.
flutterEngine.getDartExecutor().executeDartEntrypoint(
  DartEntrypoint.createDefault()
);

// Cache the FlutterEngine to be used by FlutterActivity.
FlutterEngineCache
    .getInstance()
    .put("my_engine_id", flutterEngine);

Then, in an Activity class somewhere in your app, call these four lines of code to launch the Flutter module's UI:

startActivity(
  FlutterActivity
    .withCachedEngine("my_engine_id")
    .build(currentActivity)
  );

For a demo, it's usually best to call these in response to a UI event like a button press. Once they're executed, the net promoter score UI will appear in your app!

Web

There are nearly as many ways to build a website as there are published websites, so to a certain extent the "right" way to integrate the Flutter module into your site will depend on the particular client-side technologies you're using (Angular, React, Vue, etc.) and the server you're using to host your content (Firebase Hosting, nginx, etc.).

It's not possible to cover all of the possibilities here, but the basic approach is roughly the same for any of them:

Download a recent web build of the Flutter module from this repo.

Unzip the archive into a folder somewhere within your project's source tree where it will be picked up and served by the server technology you're using (in the "public" folder of a Firebase Hosting project, for example).

Add an iframe to one of the pages in your site, and set its src URL to point to the index.html file inside the web-project-flutter folder created when unzipping the archive in the previous step.

Add client-side code to the same page to display the iframe in response to a convenient UI event, such as a button press.

Angular

The sample web application in this repo is built with Angular, and can serve as a model for web integrations. If you're also running Angular, follow the steps below to integrate the model into your project.

First, download a recent web build of the Flutter module and unzip it into the src directory of your project.

Next, change <base href="/"> to <base href="./"> in src/web-project-flutter/index.html.

Then update angular.json to include the new files:

"assets": [
    "src/favicon.ico",
    "src/assets",
    "src/web-project-flutter"
],

Add an iframe

<iframe src="./web-project-flutter/index.html"> </iframe>

Move to your Angular project directory and run:

npm install or npm install --legacy-peed-deps depending on your npm dependencies.

Finally, run ng serve to start the application.

Download Details: 
Author: flutter
Source Code: https://github.com/flutter/put-flutter-to-work 
#flutter #dart #programming 

What is GEEK

Buddha Community

Put Flutter to Work: A Flutter add-to-app Demo You Can Try with Your Apps

Google's Flutter 1.20 stable announced with new features - Navoki

Flutter Google cross-platform UI framework has released a new version 1.20 stable.

Flutter is Google’s UI framework to make apps for Android, iOS, Web, Windows, Mac, Linux, and Fuchsia OS. Since the last 2 years, the flutter Framework has already achieved popularity among mobile developers to develop Android and iOS apps. In the last few releases, Flutter also added the support of making web applications and desktop applications.

Last month they introduced the support of the Linux desktop app that can be distributed through Canonical Snap Store(Snapcraft), this enables the developers to publish there Linux desktop app for their users and publish on Snap Store.  If you want to learn how to Publish Flutter Desktop app in Snap Store that here is the tutorial.

Flutter 1.20 Framework is built on Google’s made Dart programming language that is a cross-platform language providing native performance, new UI widgets, and other more features for the developer usage.

Here are the few key points of this release:

Performance improvements for Flutter and Dart

In this release, they have got multiple performance improvements in the Dart language itself. A new improvement is to reduce the app size in the release versions of the app. Another performance improvement is to reduce junk in the display of app animation by using the warm-up phase.

sksl_warm-up

If your app is junk information during the first run then the Skia Shading Language shader provides for pre-compilation as part of your app’s build. This can speed it up by more than 2x.

Added a better support of mouse cursors for web and desktop flutter app,. Now many widgets will show cursor on top of them or you can specify the type of supported cursor you want.

Autofill for mobile text fields

Autofill was already supported in native applications now its been added to the Flutter SDK. Now prefilled information stored by your OS can be used for autofill in the application. This feature will be available soon on the flutter web.

flutter_autofill

A new widget for interaction

InteractiveViewer is a new widget design for common interactions in your app like pan, zoom drag and drop for resizing the widget. Informations on this you can check more on this API documentation where you can try this widget on the DartPad. In this release, drag-drop has more features added like you can know precisely where the drop happened and get the position.

Updated Material Slider, RangeSlider, TimePicker, and DatePicker

In this new release, there are many pre-existing widgets that were updated to match the latest material guidelines, these updates include better interaction with Slider and RangeSliderDatePicker with support for date range and time picker with the new style.

flutter_DatePicker

New pubspec.yaml format

Other than these widget updates there is some update within the project also like in pubspec.yaml file format. If you are a flutter plugin publisher then your old pubspec.yaml  is no longer supported to publish a plugin as the older format does not specify for which platform plugin you are making. All existing plugin will continue to work with flutter apps but you should make a plugin update as soon as possible.

Preview of embedded Dart DevTools in Visual Studio Code

Visual Studio code flutter extension got an update in this release. You get a preview of new features where you can analyze that Dev tools in your coding workspace. Enable this feature in your vs code by _dart.previewEmbeddedDevTools_setting. Dart DevTools menu you can choose your favorite page embed on your code workspace.

Network tracking

The updated the Dev tools comes with the network page that enables network profiling. You can track the timings and other information like status and content type of your** network calls** within your app. You can also monitor gRPC traffic.

Generate type-safe platform channels for platform interop

Pigeon is a command-line tool that will generate types of safe platform channels without adding additional dependencies. With this instead of manually matching method strings on platform channel and serializing arguments, you can invoke native class and pass nonprimitive data objects by directly calling the Dartmethod.

There is still a long list of updates in the new version of Flutter 1.2 that we cannot cover in this blog. You can get more details you can visit the official site to know more. Also, you can subscribe to the Navoki newsletter to get updates on these features and upcoming new updates and lessons. In upcoming new versions, we might see more new features and improvements.

You can get more free Flutter tutorials you can follow these courses:

#dart #developers #flutter #app developed #dart devtools in visual studio code #firebase local emulator suite in flutter #flutter autofill #flutter date picker #flutter desktop linux app build and publish on snapcraft store #flutter pigeon #flutter range slider #flutter slider #flutter time picker #flutter tutorial #flutter widget #google flutter #linux #navoki #pubspec format #setup flutter desktop on windows

Terry  Tremblay

Terry Tremblay

1598396940

What is Flutter and why you should learn it?

Flutter is an open-source UI toolkit for mobile developers, so they can use it to build native-looking** Android and iOS** applications from the same code base for both platforms. Flutter is also working to make Flutter apps for Web, PWA (progressive Web-App) and Desktop platform (Windows,macOS,Linux).

flutter-mobile-desktop-web-embedded_min

Flutter was officially released in December 2018. Since then, it has gone a much stronger flutter community.

There has been much increase in flutter developers, flutter packages, youtube tutorials, blogs, flutter examples apps, official and private events, and more. Flutter is now on top software repos based and trending on GitHub.

Flutter meaning?

What is Flutter? this question comes to many new developer’s mind.

humming_bird_dart_flutter

Flutter means flying wings quickly, and lightly but obviously, this doesn’t apply in our SDK.

So Flutter was one of the companies that were acquired by **Google **for around $40 million. That company was based on providing gesture detection and recognition from a standard webcam. But later when the Flutter was going to release in alpha version for developer it’s name was Sky, but since Google already owned Flutter name, so they rename it to Flutter.

Where Flutter is used?

Flutter is used in many startup companies nowadays, and even some MNCs are also adopting Flutter as a mobile development framework. Many top famous companies are using their apps in Flutter. Some of them here are

Dream11

Dream11

NuBank

NuBank

Reflectly app

Reflectly app

Abbey Road Studios

Abbey Road Studios

and many more other apps. Mobile development companies also adopted Flutter as a service for their clients. Even I was one of them who developed flutter apps as a freelancer and later as an IT company for mobile apps.

Flutter as a service

#dart #flutter #uncategorized #flutter framework #flutter jobs #flutter language #flutter meaning #flutter meaning in hindi #google flutter #how does flutter work #what is flutter

Idrish Dhankot

Idrish Dhankot

1622532470

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