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Edit Your Image Data and Output to File/Memory on Android and iOS

image_editor

The version of readme pub and github may be inconsistent, please refer to github.

Use native(objc,kotlin) code to handle image data, it is easy to process pictures, and can be used for saving/uploading/preview images.

  • image_editor
    • Screenshot
    • Platform of support
    • Change Log
    • Support
    • ImageEditor Usage
      • ImageEditor method params
      • ImageEditorOption
      • Option
        • Flip
        • Clip
        • Rotate
        • Color Martix
        • Scale
        • AddText
          • FontManager
        • MixImage
          • BlendMode
      • DrawOption
      • OutputFormat
    • ImageMerge
    • LICENSE
      • Third party

Screenshot

img

Platform of support

Android, iOS.

Change Log

This version is a null-safety version.

Please read document for null-safety information in dart or flutter.

Support

  •  flip
  •  crop
  •  rotate
  •  scale
  •  matrix
  •  add text
  •  mix image
  •  merge multi image
  •  draw somethings
    •  draw point
    •  draw line
    •  draw rect
    •  draw circle
    •  draw path
    •  draw Bezier
  •  Gaussian blur

ImageEditor Usage

pub package GitHub GitHub stars

dependencies:
  image_editor: $latest

About version, please find it from pub.

Import

import 'package:image_editor/image_editor.dart';

Method list:

ImageEditor.editImage();
ImageEditor.editFileImage();
ImageEditor.editFileImageAndGetFile();
ImageEditor.editImageAndGetFile();

Example used alone

Example of extended_image

ImageEditor method params

NameDescription
imagedart.typed_data.Uint8List
filedart.io.File
imageEditorOptionflutter_image_editor.ImageEditorOption

ImageEditorOption

final editorOption = ImageEditorOption();
editorOption.addOption(FlipOption());
editorOption.addOption(ClipOption());
editorOption.addOption(RotateOption());
editorOption.addOption(); // and other option.

editorOption.outputFormat = OutputFormat.png(88);

Option

Flip

FlipOption(horizontal:true, vertical:false);

Clip

ClipOption(x:0, y:0, width:1920, height:1920);

Rotate

RotateOption(degree: 180);

Color Martix

ColorOption();

it's use 5x4 matrix : https://developer.android.google.cn/reference/android/graphics/ColorMatrix.html Although it is an Android document, the color matrix is also applicable to iOS.

a, b, c, d, e,
f, g, h, i, j,
k, l, m, n, o,
p, q, r, s, t

ColorOption has some factory constructor to help use change brightness, saturation and contrast. If you have more color matrix, you can open Pull Requests or issue.

Scale

ScaleOption(width,height);

After specifying the width and height, it is not clipped, but stretched to the specified width and height (Does not maintain the aspect ratio of the image).

AddText

All of unit is pixel.

final textOption = AddTextOption();
textOption.addText(
  EditorText(
    offset: Offset(0, 0),
    text: this._controller.text,
    fontSizePx: size,
    color: Colors.red,
    fontName: '', // You must register font before use. If the fontName is empty string, the text will use default system font.
  ),
);

FontManager

Here we can use FontManager to register font.

File fontFile = File(path)//;
final String fontName = await FontManager.registerFont(fontFile);

// the fontName can be use int EditorText.
final textOption = AddTextOption();
textOption.addText(
  EditorText(
    offset: Offset(0, 0),
    text: this._controller.text,
    fontSizePx: size,
    color: Colors.red,
    fontName: fontName, // You must register font before use.
  ),
);

MixImage

void mix(BlendMode blendMode) async {
  final src = await loadFromAsset(R.ASSETS_SRC_PNG);
  final dst = await loadFromAsset(R.ASSETS_DST_PNG);
  final optionGroup = ImageEditorOption();
  optionGroup.outputFormat = OutputFormat.png();
  optionGroup.addOption(
    MixImageOption(
      x: 300,
      y: 300,
      width: 150,
      height: 150,
      target: MemoryImageSource(src),
      blendMode: blendMode,
    ),
  );
  final result =
      await ImageEditor.editImage(image: dst, imageEditorOption: optionGroup);
  this.image = MemoryImage(result);
  setState(() {});
}

BlendMode

Support next BlendMode, other will be ignored. You can also see the document of flutter.

iOSandroid(PorterDuff.Mode)flutter(BlendMode)
kCGBlendModeClearCLEARclear
 SRCsrc
 DSTdst
kCGBlendModeNormalSRC_OVERsrcOver
kCGBlendModeDestinationOverDST_OVERdstOver
kCGBlendModeSourceInSRC_INsrcIn
kCGBlendModeDestinationInDST_INdstIn
kCGBlendModeSourceOutSRC_OUTsrcOut
kCGBlendModeDestinationOverDST_OUTdstOut
kCGBlendModeSourceAtopSRC_ATOPsrcATop
kCGBlendModeDestinationAtopDST_ATOPdstATop
kCGBlendModeXORXORxor
kCGBlendModeDarkenDARKENdarken
kCGBlendModeLightenLIGHTENlighten
kCGBlendModeMultiplyMULTIPLYmultiply
kCGBlendModeScreenSCREENscreen
kCGBlendModeOverlayOVERLAYoverlay

DrawOption

Main class : DrawOption

Support:

  • Line
  • Rect
  • Oval
  • Points
  • Path
    • move
    • line
    • bezier2
    • bezier3

Example

Style of paint: DrawPaint, user can set lineWeight,color,style(stroke,fill).

OutputFormat

var outputFormat = OutputFormat.png();
var outputFormat = OutputFormat.jpeg(95);

ImageMerge

    final slideLength = 180.0;
    final option = ImageMergeOption(
      canvasSize: Size(slideLength * count, slideLength * count),
      format: OutputFormat.png(),
    );

    final memory = await loadFromAsset(R.ASSETS_ICON_PNG);
    for (var i = 0; i < count; i++) {
      option.addImage(
        MergeImageConfig(
          image: MemoryImageSource(memory),
          position: ImagePosition(
            Offset(slideLength * i, slideLength * i),
            Size.square(slideLength),
          ),
        ),
      );
    }
    for (var i = 0; i < count; i++) {
      option.addImage(
        MergeImageConfig(
          image: MemoryImageSource(memory),
          position: ImagePosition(
            Offset(
                slideLength * count - slideLength * (i + 1), slideLength * i),
            Size.square(slideLength),
          ),
        ),
      );
    }

    final result = await ImageMerger.mergeToMemory(option: option);
    provider = MemoryImage(result);
    setState(() {});

LICENSE

MIT Style.

Third party

Under Apache 2.0 style:

Some martix code come from android sdk.

TrueTypeParser : Use it to read font name.

Use this package as a library

Depend on it

Run this command:

With Flutter:

 $ flutter pub add image_editor

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

dependencies:
  image_editor: ^1.0.1

Alternatively, your editor might support 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:image_editor/image_editor.dart';

example/lib/main.dart

import 'dart:typed_data';

import 'package:flutter/material.dart';
import 'package:flutter/services.dart';
import 'package:flutter_image_editor_example/home_page.dart';
import 'package:oktoast/oktoast.dart';

void main() {
  runApp(MyApp());
}

class MyApp extends StatefulWidget {
  @override
  _MyAppState createState() => _MyAppState();
}

class _MyAppState extends State<MyApp> {
  @override
  Widget build(BuildContext context) {
    return OKToast(
      position: ToastPosition.bottom,
      child: MaterialApp(
        home: IndexPage(),
      ),
    );
  }
}

Future<Uint8List> loadFromAsset(String key) async {
  final ByteData byteData = await rootBundle.load(key);
  return byteData.buffer.asUint8List();
}

Download Details:
 

Author: fluttercandies
Download Link: Download The Source Code
Official Website: https://github.com/fluttercandies/flutter_image_editor 
License: MIT License

#flutter 

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Edit Your Image Data and Output to File/Memory on Android and iOS

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Source Code: Tic Tac Toe Game Project

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Android Project: A stopwatch is another simple android project idea that will work the same as a normal handheld timepiece that measures the time elapsed between its activation and deactivation. This application will have three buttons that are: start, stop, and hold.

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6. To Do App

Android Project: This is another very simple project idea for you as a beginner. This application as the name suggests will be a To-Do list holding app. It’ll store the users schedules and their upcoming meetings or events. In this application, users will be enabled to write their important notes as well. To make it safe, provide a login page before the user can access it.

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Now for users, they will sign up and get access to the write section. Here the users can note down the things and store them permanently. Users can also alter the data or delete them. Finally, they can logout and also, login again and again whenever they like.

7. Roman to decimal converter

Android Project: This app is aimed at the conversion of Roman numbers to their significant decimal number. It’ll help to check the meaning of the roman numbers. Moreover, it will be easy to develop and will help you get your hands on coding and Android.

You need to use Android Studio, Java for coding and XML for interface. The application will take input from the users and convert them to decimal. Once it converts the Roman no. into decimal, it will show the results on the screen.

The users are supposed to just enter the Roman Number and they’ll get the decimal values on the screen. This can be a good android project for final year students.

8. Virtual Dice Roller

Android Project: Well, coming to this part that is Virtual Dice or a random no. generator. It is another simple but interesting app for computer science students. The only task that it would need to do would be to generate a number randomly. This can help people who’re often confused between two or more things.

Using a simple random number generator you can actually create something as good as this. All you’d need to do is get you hands-on OnClick listeners. And a good layout would be cherry on the cake.

The user’s task would be to set the range of the numbers and then click on the roll button. And the app will show them a randomly generated number. Isn’t it interesting ? Try soon!

9. A Scientific Calculator App

Android Project: This application is very important for you as a beginner as it will let you use your logical thinking and improve your programming skills. This is a scientific calculator that will help the users to do various calculations at ease.

To make this application you’d need to use Android Studio. Here you’d need to use arithmetic logics for the calculations. The user would need to give input to the application that will be in terms of numbers. After that, the user will give the operator as an input. Then the Application will calculate and generate the result on the user screen.

10. SMS App

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