Removing Image Background - Pixlr Magic Wand

This video tutorial will show you how to use the Pixlr Magic Wand tool. Pixlr is a fantastic free app that allows you to create images or edit photographs. When there is one color or straight forward shading in a real life the picture the background can be simply removed using the Pixlr Magic Wand.

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Removing Image Background - Pixlr Magic Wand

I am Developer

1597565398

Laravel 7/6 Image Validation

In this image validation in laravel 7/6, i will share with you how validate image and image file mime type like like jpeg, png, bmp, gif, svg, or webp before uploading image into database and server folder in laravel app.

https://www.tutsmake.com/image-validation-in-laravel/

#laravel image validation #image validation in laravel 7 #laravel image size validation #laravel image upload #laravel image validation max #laravel 6 image validation

Ahebwe  Oscar

Ahebwe Oscar

1620200340

how to integrate CKEditor in Django

how to integrate CKEditor in Django

Welcome to my Blog, in this article we learn about how to integrate CKEditor in Django and inside this, we enable the image upload button to add an image in the blog from local. When I add a CKEditor first time in my project then it was very difficult for me but now I can easily implement it in my project so you can learn and implement CKEditor in your project easily.

how to integrate CKEditor in Django

#django #add image upload in ckeditor #add image upload option ckeditor #ckeditor image upload #ckeditor image upload from local #how to add ckeditor in django #how to add image upload plugin in ckeditor #how to install ckeditor in django #how to integrate ckeditor in django #image upload in ckeditor #image upload option in ckeditor

I am Developer

1597563325

Laravel 7/6 Image Upload Example Tutorial

Laravel image upload example tutorial. Here, i will show you how to upload image in laravel 7/6 with preview and validation.

Before store image into db and folder, you can validate uploaded image by using laravel validation rules. as well as you can show preview of uploaded image in laravel.

Image Upload In Laravel 7/6 with Validation

Image upload in laravel 7/6 with preview and validation. And storage image into folder and MySQL database by using the below steps:

Install Laravel Fresh App
Setup Database Details
Generate Image Migration & Model
Create Image Upload Route
Create Image Controller
Create Image Upload and Preview Blade View
Start Development Server

https://www.tutsmake.com/laravel-7-6-image-upload-with-preview-validation-tutorial/

#laravel 7 image upload example #laravel upload image to database #how to insert image into database in laravel #laravel upload image to storage #laravel image upload tutorial #image upload in laravel 7/6

Lane  Sanford

Lane Sanford

1591903440

Preprocessing your images for machine learning (image recognition)

During my studies at JKU there was a task for preprocessing images for a machine learning project. It is necessary to clean the raw images before using them in a learning algorithm, so thats why we create a pre-processing function. I think it can be quite useful for others as well so I want to share a bit of my approach. The file is structured in a way that it is easy to understand and also should have a tutorial-like effect.

#image-recognition #image #image-classification #machine-learning #image-processing

Automatically Generates Native Code for Adding Splash Screens

When your app is opened, there is a brief time while the native app loads Flutter. By default, during this time the native app displays a white splash screen. This package automatically generates iOS, Android, and Web native code for customizing this native splash screen background color and splash image. Supports dark mode, full screen, and platform-specific options.

Usage

Would you prefer a video tutorial instead? Check out Johannes Milke's tutorial.

First, add flutter_native_splash as a dev dependency in your pubspec.yaml file. It belongs in dev_dependencies because it is a command line tool.

dev_dependencies:
  flutter_native_splash: ^1.2.2

Don't forget to flutter pub get.

1. Setting the splash screen

Customized the following settings and add to your project's pubspec.yaml file or place in a new file in your root project folder named flutter_native_splash.yaml.

flutter_native_splash:

  # This package generates native code to customize Flutter's default white native splash screen
  # with background color and splash image.
  # Customize the parameters below, and run the following command in the terminal:
  # flutter pub run flutter_native_splash:create
  # To restore Flutter's default white splash screen, run the following command in the terminal:
  # flutter pub run flutter_native_splash:remove

  # color or background_image is the only required parameter.  Use color to set the background
  # of your splash screen to a solid color.  Use background_image to set the background of your
  # splash screen to a png image.  This is useful for gradients. The image will be stretch to the
  # size of the app. Only one parameter can be used, color and background_image cannot both be set.
  color: "#42a5f5"
  #background_image: "assets/background.png"
  
  # Optional parameters are listed below.  To enable a parameter, uncomment the line by removing 
  # the leading # character.

  # The image parameter allows you to specify an image used in the splash screen.  It must be a 
  # png file and should be sized for 4x pixel density.
  #image: assets/splash.png

  # The color_dark, background_image_dark, and image_dark are parameters that set the background
  # and image when the device is in dark mode. If they are not specified, the app will use the
  # parameters from above. If the image_dark parameter is specified, color_dark or 
  # background_image_dark must be specified.  color_dark and background_image_dark cannot both be
  # set.
  #color_dark: "#042a49"
  #background_image_dark: "assets/dark-background.png"
  #image_dark: assets/splash-invert.png

  # The android, ios and web parameters can be used to disable generating a splash screen on a given 
  # platform.
  #android: false
  #ios: false
  #web: false

  # The position of the splash image can be set with android_gravity, ios_content_mode, and
  # web_image_mode parameters.  All default to center.
  #
  # android_gravity can be one of the following Android Gravity (see 
  # https://developer.android.com/reference/android/view/Gravity): bottom, center, 
  # center_horizontal, center_vertical, clip_horizontal, clip_vertical, end, fill, fill_horizontal,
  # fill_vertical, left, right, start, or top.
  #android_gravity: center
  #
  # ios_content_mode can be one of the following iOS UIView.ContentMode (see 
  # https://developer.apple.com/documentation/uikit/uiview/contentmode): scaleToFill, 
  # scaleAspectFit, scaleAspectFill, center, top, bottom, left, right, topLeft, topRight, 
  # bottomLeft, or bottomRight.
  #ios_content_mode: center
  #
  # web_image_mode can be one of the following modes: center, contain, stretch, and cover.
  #web_image_mode: center

  # To hide the notification bar, use the fullscreen parameter.  Has no affect in web since web 
  # has no notification bar.  Defaults to false.
  # NOTE: Unlike Android, iOS will not automatically show the notification bar when the app loads.
  #       To show the notification bar, add the following code to your Flutter app:
  #       WidgetsFlutterBinding.ensureInitialized();
  #       SystemChrome.setEnabledSystemUIOverlays([SystemUiOverlay.bottom, SystemUiOverlay.top]);
  #fullscreen: true
  
  # If you have changed the name(s) of your info.plist file(s), you can specify the filename(s) 
  # with the info_plist_files parameter.  Remove only the # characters in the three lines below,
  # do not remove any spaces:
  #info_plist_files:
  #  - 'ios/Runner/Info-Debug.plist'
  #  - 'ios/Runner/Info-Release.plist'

  # To enable support for Android 12, set the following parameter to true.  Defaults to false.
  #android12: true

2. Run the package

After adding your settings, run the following command in the terminal:

flutter pub run flutter_native_splash:create

When the package finishes running, your splash screen is ready.

To specify the yaml file location just add --path with the command in the terminal:

flutter pub run flutter_native_splash:create --path=path/to/my/file.yaml

Beta support for Android 12

Android 12 has a new method of adding splash screens, which consists of specifying the window background, animated app icon, and the icon background. Android 12 also supports legacy splash screens as they have been implemented in Flutter and this package. At this time, this package will provide beta support for Android 12 with a legacy implementation.

To enable Android 12 support, set up the Android 12 SDK, add android12: true to your configuration, and run the package:

flutter pub run flutter_native_splash:create

The package will add a styles.xml in values-v31 and values-night-v31 resource folders, which will allow Android 12 to maintain the legacy splash screen.

This package will add support for the new Android 12 splash screens in the future. However, I will wait to see how Flutter adapts to the new splash screen format so that this package can complement Flutter's implementation and avoid reinventing the wheel.

At this time, the splash screen may jump when using fullscreen with Android 12.

Recommendations

Secondary splash screen:

The native splash screen is displayed while the native app loads the Flutter framework. Once Flutter loads, there are probably still resources that need to be loaded before your app is ready. For this reason, you should consider implementing a secondary Flutter splash screen or placeholders that display while these resources load. The example show an implimentation of a secondary splash screen.

FAQs

I got the error "A splash screen was provided to Flutter, but this is deprecated."

This message is not related to this package, but is related to a change in how Flutter handles splash screens in Flutter 2.5. It is caused by having the following code in your AndroidManifest.xml, which was included by default in previous versions of Flutter:

<meta-data
 android:name="io.flutter.embedding.android.SplashScreenDrawable"
 android:resource="@drawable/launch_background"
 />

The solution is to remove the above code.

Can I change the duration of the splash screen?

The native splash screen is displayed while the native app loads the Flutter framework. Because the resources in your app cannot load while the native splash screen is displayed, the native splash screen must be as fast as possible. Note that delaying the user experience is a poor design decision.

Are animations/lottie/GIF images supported?

Not at this time. However, you may want to consider a secondary splash screen that supports animation. See the secondary splash screen recommendation.

I got the error AAPT: error: style attribute 'android:attr/windowSplashScreenBackground' not found

This attribute is only found in Android 12, so if you are getting this error, it means your project is not fully set up for Android 12. Did you update your app's build configuration?

I see a white screen between splash screen and app

  1. It may be caused by an iOS splash caching bug, which can be solved by uninstalling your app, powering off your device, power back on, and then try reinstalling.
  2. It may be caused by the delay due to initialization in your app. To test this, make a test where your main() returns a Container(color: Colors.black);. If the white flash goes away, it will show that your content is not loading fast enough. You could solve this by creating a secondary splash screen or loading a barebones version of your app with placeholders, and then populate the placeholders as content loads.

Notes

If splash screen was not updated properly on iOS or if you experience a white screen before splash screen, run flutter clean and recompile your app. If that does not solve the problem, delete your app from the device, power down the device, power up device, install and launch app as per this stackoverflow thread.

This package modifies launch_background.xml and styles.xml files on Android, LaunchScreen.storyboard and Info.plist on iOS, and index.html on Web. If you have modified these files manually, this plugin may not work properly. Please open an issue if you find any bugs.

How it works

Android

  • Your splash image will be resized to mdpi, hdpi, xhdpi, xxhdpi and xxxhdpi drawables.
  • An <item> tag containing a <bitmap> for your splash image drawable will be added in launch_background.xml
  • Background color will be added in colors.xml and referenced in launch_background.xml.
  • Code for full screen mode toggle will be added in styles.xml.
  • Dark mode variants are placed in drawable-night, values-night, etc. resource folders.

iOS

  • Your splash image will be resized to @3x and @2x images.
  • Color and image properties will be inserted in LaunchScreen.storyboard.
  • The background color is implemented by using a single pixel png file and stretching it to fit the screen.
  • Code for hidden status bar toggle will be added in Info.plist.

Web

  • A web/splash folder will be created for splash screen images and CSS files.
  • Your splash image will be resized to 1x, 2x, 3x, and 4x sizes and placed in web/splash/img.
  • The splash style sheet will be added to the app's web/index.html, as well as the HTML for the splash pictures.

Removing

If you would like to restore Flutter's default white splash screen, run the following command in the terminal:

flutter pub run flutter_native_splash:remove

Acknowledgments

This package was originally created by Henrique Arthur and it is currently maintained by Jon Hanson.

Bugs or Requests

If you encounter any problems feel free to open an issue. If you feel the library is missing a feature, please raise a ticket. Pull request are also welcome.

Use this package as a library

Depend on it

Run this command:

With Dart:

 $ dart pub add flutter_native_splash

With Flutter:

 $ flutter pub add flutter_native_splash

This will add a line like this to your package's pubspec.yaml (and run an implicit dart pub get):

dependencies:
  flutter_native_splash: ^1.2.2

Alternatively, your editor might support dart pub get or flutter pub get. Check the docs for your editor to learn more.

Import it

Now in your Dart code, you can use:

import 'package:flutter_native_splash/flutter_native_splash.dart'; 

example/lib/main.dart

import 'package:flutter/material.dart';
import 'package:flutter/services.dart';

void main() {
  WidgetsFlutterBinding.ensureInitialized();
  SystemChrome.setEnabledSystemUIMode(
      SystemUiMode.manual, overlays: [SystemUiOverlay.bottom, SystemUiOverlay.top]);
  runApp(const MyApp());
}

class MyApp extends StatelessWidget {
  const MyApp({Key? key}) : super(key: key);

  // This widget is the root of your application.
  @override
  Widget build(BuildContext context) {
    return FutureBuilder(
      future: Init.instance.initialize(),
      builder: (context, AsyncSnapshot snapshot) {
        // Show splash screen while waiting for app resources to load:
        if (snapshot.connectionState == ConnectionState.waiting) {
          return const MaterialApp(home: Splash());
        } else {
          // Loading is done, return the app:
          return MaterialApp(
            title: 'Flutter Demo',
            theme: ThemeData(
              // This is the theme of your application.
              //
              // Try running your application with "flutter run". You'll see the
              // application has a blue toolbar. Then, without quitting the app, try
              // changing the primarySwatch below to Colors.green and then invoke
              // "hot reload" (press "r" in the console where you ran "flutter run",
              // or simply save your changes to "hot reload" in a Flutter IDE).
              // Notice that the counter didn't reset back to zero; the application
              // is not restarted.
              primarySwatch: Colors.blue,
            ),
            home: const MyHomePage(title: 'Flutter Demo Home Page'),
          );
        }
      },
    );
  }
}

class MyHomePage extends StatefulWidget {
  const MyHomePage({Key? key, required this.title}) : super(key: key);

  // This widget is the home page of your application. It is stateful, meaning
  // that it has a State object (defined below) that contains fields that affect
  // how it looks.

  // This class is the configuration for the state. It holds the values (in this
  // case the title) provided by the parent (in this case the App widget) and
  // used by the build method of the State. Fields in a Widget subclass are
  // always marked "final".

  final String title;

  @override
  State<MyHomePage> createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  int _counter = 0;

  void _incrementCounter() {
    setState(() {
      // This call to setState tells the Flutter framework that something has
      // changed in this State, which causes it to rerun the build method below
      // so that the display can reflect the updated values. If we changed
      // _counter without calling setState(), then the build method would not be
      // called again, and so nothing would appear to happen.
      _counter++;
    });
  }

  @override
  Widget build(BuildContext context) {
    // This method is rerun every time setState is called, for instance as done
    // by the _incrementCounter method above.
    //
    // The Flutter framework has been optimized to make rerunning build methods
    // fast, so that you can just rebuild anything that needs updating rather
    // than having to individually change instances of widgets.
    return Scaffold(
      appBar: AppBar(
        // Here we take the value from the MyHomePage object that was created by
        // the App.build method, and use it to set our appbar title.
        title: Text(widget.title),
      ),
      body: Center(
        // Center is a layout widget. It takes a single child and positions it
        // in the middle of the parent.
        child: Column(
          // Column is also a layout widget. It takes a list of children and
          // arranges them vertically. By default, it sizes itself to fit its
          // children horizontally, and tries to be as tall as its parent.
          //
          // Invoke "debug painting" (press "p" in the console, choose the
          // "Toggle Debug Paint" action from the Flutter Inspector in Android
          // Studio, or the "Toggle Debug Paint" command in Visual Studio Code)
          // to see the wireframe for each widget.
          //
          // Column has various properties to control how it sizes itself and
          // how it positions its children. Here we use mainAxisAlignment to
          // center the children vertically; the main axis here is the vertical
          // axis because Columns are vertical (the cross axis would be
          // horizontal).
          mainAxisAlignment: MainAxisAlignment.center,
          children: <Widget>[
            const Text(
              'You have pushed the button this many times:',
            ),
            Text(
              '$_counter',
              style: Theme.of(context).textTheme.headline4,
            ),
          ],
        ),
      ),
      floatingActionButton: FloatingActionButton(
        onPressed: _incrementCounter,
        tooltip: 'Increment',
        child: const Icon(Icons.add),
      ), // This trailing comma makes auto-formatting nicer for build methods.
    );
  }
}

class Splash extends StatelessWidget {
  const Splash({Key key}) : super(key: key);

  @override
  Widget build(BuildContext context) {
    bool lightMode =
        MediaQuery.of(context).platformBrightness == Brightness.light;
    return Scaffold(
      backgroundColor: lightMode
          ? const Color(0x00e1f5fe).withOpacity(1.0)
          : const Color(0x00042a49).withOpacity(1.0),
      body: Center(
          child: lightMode
              ? Image.asset('assets/splash.png')
              : Image.asset('assets/splash_dark.png')),
    );
  }
}

class Init {
  Init._();
  static final instance = Init._();

  Future initialize() async {
    // This is where you can initialize the resources needed by your app while
    // the splash screen is displayed.  Remove the following example because
    // delaying the user experience is a bad design practice!
    await Future.delayed(const Duration(seconds: 3));
  }
} 

Download Details:

Author: jonbhanson

Source Code: https://github.com/jonbhanson/flutter_native_splash

#flutter