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


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
      • Third party



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.


  •  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

  image_editor: $latest

About version, please find it from pub.


import 'package:image_editor/image_editor.dart';

Method list:


Example used alone

Example of extended_image

ImageEditor method params



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

editorOption.outputFormat = OutputFormat.png(88);



FlipOption(horizontal:true, vertical:false);


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


RotateOption(degree: 180);

Color Martix


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.



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).


All of unit is pixel.

final textOption = AddTextOption();
    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.


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();
    offset: Offset(0, 0),
    text: this._controller.text,
    fontSizePx: size,
    color: Colors.red,
    fontName: fontName, // You must register font before use.


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();
      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(() {});


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



Main class : DrawOption


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


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


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


    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++) {
          image: MemoryImageSource(memory),
          position: ImagePosition(
            Offset(slideLength * i, slideLength * i),
    for (var i = 0; i < count; i++) {
          image: MemoryImageSource(memory),
          position: ImagePosition(
                slideLength * count - slideLength * (i + 1), slideLength * i),

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


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):

  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';


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() {

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

class _MyAppState extends State<MyApp> {
  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


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

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Top Android Projects with Source Code

Android Projects with Source Code – Your entry pass into the world of Android

Hello Everyone, welcome to this article, which is going to be really important to all those who’re in dilemma for their projects and the project submissions. This article is also going to help you if you’re an enthusiast looking forward to explore and enhance your Android skills. The reason is that we’re here to provide you the best ideas of Android Project with source code that you can choose as per your choice.

These project ideas are simple suggestions to help you deal with the difficulty of choosing the correct projects. In this article, we’ll see the project ideas from beginners level and later we’ll move on to intermediate to advance.

top android projects with source code

Android Projects with Source Code

Before working on real-time projects, it is recommended to create a sample hello world project in android studio and get a flavor of project creation as well as execution: Create your first android project

Android Projects for beginners

1. Calculator

build a simple calculator app in android studio source code

Android Project: A calculator will be an easy application if you have just learned Android and coding for Java. This Application will simply take the input values and the operation to be performed from the users. After taking the input it’ll return the results to them on the screen. This is a really easy application and doesn’t need use of any particular package.

To make a calculator you’d need Android IDE, Kotlin/Java for coding, and for layout of your application, you’d need XML or JSON. For this, coding would be the same as that in any language, but in the form of an application. Not to forget creating a calculator initially will increase your logical thinking.

Once the user installs the calculator, they’re ready to use it even without the internet. They’ll enter the values, and the application will show them the value after performing the given operations on the entered operands.

Source Code: Simple Calculator Project

2. A Reminder App

Android Project: This is a good project for beginners. A Reminder App can help you set reminders for different events that you have throughout the day. It’ll help you stay updated with all your tasks for the day. It can be useful for all those who are not so good at organizing their plans and forget easily. This would be a simple application just whose task would be just to remind you of something at a particular time.

To make a Reminder App you need to code in Kotlin/Java and design the layout using XML or JSON. For the functionality of the app, you’d need to make use of AlarmManager Class and Notifications in Android.

In this, the user would be able to set reminders and time in the application. Users can schedule reminders that would remind them to drink water again and again throughout the day. Or to remind them of their medications.

3. Quiz Application

Android Project: Another beginner’s level project Idea can be a Quiz Application in android. Here you can provide the users with Quiz on various general knowledge topics. These practices will ensure that you’re able to set the layouts properly and slowly increase your pace of learning the Android application development. In this you’ll learn to use various Layout components at the same time understanding them better.

To make a quiz application you’ll need to code in Java and set layouts using xml or java whichever you prefer. You can also use JSON for the layouts whichever preferable.

In the app, questions would be asked and answers would be shown as multiple choices. The user selects the answer and gets shown on the screen if the answers are correct. In the end the final marks would be shown to the users.

4. Simple Tic-Tac-Toe

android project tic tac toe game app

Android Project: Tic-Tac-Toe is a nice game, I guess most of you all are well aware of it. This will be a game for two players. In this android game, users would be putting X and O in the given 9 parts of a box one by one. The first player to arrange X or O in an adjacent line of three wins.

To build this game, you’d need Java and XML for Android Studio. And simply apply the logic on that. This game will have a set of three matches. So, it’ll also have a scoreboard. This scoreboard will show the final result at the end of one complete set.

Upon entering the game they’ll enter their names. And that’s when the game begins. They’ll touch one of the empty boxes present there and get their turn one by one. At the end of the game, there would be a winner declared.

Source Code: Tic Tac Toe Game Project

5. Stopwatch

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.

This application would need to use Java and XML. For this application, we need to set the timer properly as it is initially set to milliseconds, and that should be converted to minutes and then hours properly. The users can use this application and all they’d need to do is, start the stopwatch and then stop it when they are done. They can also pause the timer and continue it again when they like.

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.

So, this app will have a login page, sign-up page, logout system, and the area to write their tasks, events, or important notes. You can build it in android studio using Java and XML at ease. Using XML you can build the user interface as user-friendly as you can. And to store the users’ data, you can use SQLite enabling the users to even delete the data permanently.

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

Android Project: An SMS app is another easy but effective idea. It will let you send the SMS to various no. just in the same way as you use the default messaging application in your phone. This project will help you with better understanding of SMSManager in Android.

For this application, you would need to implement Java class SMSManager in Android. For the Layout you can use XML or JSON. Implementing SMSManager into the app is an easy task, so you would love this.

The user would be provided with the facility to text to whichever number they wish also, they’d be able to choose the numbers from the contact list. Another thing would be the Textbox, where they’ll enter their message. Once the message is entered they can happily click on the send button.

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