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Hey there, tech enthusiasts and app developers! Let’s talk about something exciting that’s been shaking up the mobile app world: Flutter. If you’re tired of the old-school approach to building mobile apps, you’re in for a treat. Why Flutter is Super Cool ? Remember the days when you had to write completely separate code for Continue Reading »
Gradle and Maven are both popular build tools used in the software development process, particularly in Java projects. They serve the purpose of automating the process of building, testing, packaging, and managing dependencies for a software project. While they share common goals, they have distinct characteristics and approaches. Gradle: Build Script Language: Language: Gradle build Continue Reading »
Introduction The event loop is a mechanism that is an integral part of the browser environment and runs continuously, whether the code is synchronous or asynchronous. The primary function of the event loop is to manage the execution of JavaScript code, placing callbacks in a queue and pushing them onto the call stack when they Continue Reading »
In the realm of software development, Requirement Engineering (RE) stands as a critical and foundational process that lays the groundwork for successful project outcomes. Requirements engineering is the process of identifying, analyzing, specifying, validating, and managing the needs and expectations of stakeholders for a software system. In this blog, we’ll dive into the world of Continue Reading »
In today’s digital age, communication is key. Whether it’s writing an email, drafting a blog post, or creating a social media update, we’re always looking for ways to improve the way we communicate. That’s where a rich text editor comes in. With a rich text editor, you can easily format your text, add images, and Continue Reading »
PWA provides the facility where the user can directly install the particular web application as a mobile application without going to the Play Store(Applicable for android only). The user can run the web application as a mobile application with an actual look and feel. In order to call a Web App a PWA it must Continue Reading »
Swagger is a tool which is used to develop APIs, interact with APIs, document APIs and test APIs. The main application of swagger is to document and test the APIs. Now the question is why we need to document APIs? So when you develop an API, you need to provide some information(end-points, response codes, request-response Continue Reading »
Dependency Inversion Principle Previous Principle: Interface Segregation Principle High-level modules should not depend on low-level modules. Both should depend on abstractions. When designing a system we have low level classes (classes which implement primary operation like: Network access, Disk access, Database access) and high level classes which have business logic. High level classes are dependent on Continue Reading »
Interface Segregation Principle Previous Principle: Liskov’s Substitution Principle A client should never be forced to implement an interface that it doesn’t use or clients shouldn’t be forced to depend on methods they do not use. In OOD we provide abstraction to module using interfaces, so we create an interface for a module and an implementation class. Continue Reading »
Liskov’s Substitution Principle Previous Principle: Open Close Principle Let q(x) be a property provable about objects of x of type T. Then q(y) should be provable for objects y of type S where S is a subtype of T. All it is saying that, Any method which is using a reference of base class can use Continue Reading »
Open Close Principle If you have not read Single Responsibility Principle Start from here Single Responsibility Principle Classes should be open for extension, but closed for modification This principle states that any new functionality can be added in a system with minimum modification in the current code. Means the system should be open to additions but it should Continue Reading »
Object Oriented Design Principles A good design is most important step of Software Development life cycle, and to have a good design we must follow some set of guidelines. According to Robert Martin in “Agile Software Development: Principles, Patterns, and Practices” there are 3 main reasons of bad design that should be avoided: Rigidity – System Continue Reading »
I found this quote by James O. Coplien on Japanese workplace organization methodology called 5S Clean your workplace on daily basis completely or set cleaning frequency. Use cleaning as inspection. Prevent machinery and equipment deterioration. Keep workplace safe and easy to work. Keep workplace clean and pleasing to work in. Just like our organization, the codebase Continue Reading »
Hello, folks. In this post we are going to implement a reusable component for freehand drawing. We will see how to use `UIGestureRecognizer` for drawing and using linear polarization to make our drawing smooth. We will also create a method to draw an arrow with respect to two points. So let’s start with creating a Continue Reading »
RESTful Web Services are basically REST Architecture based Web Services. In REST Architecture everything is a resource. RESTful web services are light weight, highly scalable and maintainable and are very commonly used to create APIs. Why has REST API become so popular ? Separation between the client and the server. Visibility, reliability and scalability. Continue Reading »
User experience is the key factor for any application. Thus, More the developer is capable of delivering help, higher is the user experience. It is a mandatory for almost every application to include sign up forms,()……etc. Hence, pops up the point of validation to all these fields. Consider a Sign up form consisting of following Continue Reading »
“We all need assistants in today’s life who can remind us our daily tasks and It will be a cherry on the cake if our smart phones play that role!!” iOS is packed with this feature with the name of ‘Local Notifications’. They work like reminders and pops on the navigation bar. Simply, with iOS 4 release, Continue Reading »
Error Handling: Error is an issue or unexpected condition that may cause a program to not function properly. Error can be compile time or runtime. Error Handling is a process of identifying, catching and recovering the error conditions. Here we are trying to handle server side error which occurred while sending request or receiving response. These errors maybe Continue Reading »
In your iOS application there are many scenario when you have to let user select an image from photo library or capture an image using Camera. In this post we will see how you can use UIImagePickerController to let user capture an image or select it from photo album. Image Picker Controller is very easy and handy Continue Reading »
What is the Problem? Guess if we have a mobile website as well as mobile App and an user share the url of any content on our website to a user who have our application installed on his/hers phone. If the user click on the link it will be opened in the web browser, but the Continue Reading »
When we use images in our application then we face different type of scenarios while handling the image. Before we go into the scenarios / situations of image handling in Application, let us understand the concept of UIImage and UIImageView. Concept of UIImage and UIImageView (container) UIImage – Bitmap with different formats Ex png and jpeg. Recommended Continue Reading »
UIViewController– A view controller manages a set of views and makes your app’s user interface. It coordinates with model objects and other controller objects. Basically, it plays a combine role for both view objects and controller objects. Each view controller shows it’s own views to display the app content. The views are automatically loaded when Continue Reading »
Scale Animation – Introduction Scale Animation is basically to increase or decrease the size of the View. There is a class ScaleAnimation. We need to create instance of ScaleAnimation (Can be done in XML also) to do the work. One of the main constructor of this class is: public ScaleAnimation( float fromX, float toX, float Continue Reading »
Category What is Category and why do we need this in iOS Development? First thing you need to know, Category is not a subclassing (Inheritance). Category is simply a concept of adding methods to your existing class. No need to create the instance of your category class as it will be called from your Main class instance. Continue Reading »
To get a location in iOS device, there are areas that we need to think about before we implement / design for getting location in an application. Points / Areas to consider: Where to register in application for getting location updates Accuracy – What accuracy of location are we looking for Exit Strategy in case Continue Reading »
Introduction to Lazy Loading What is lazy loading? A little introduction of lazy loading is it is a design pattern to defer the initialization of an object until the point at which it is needed. In simple words create objects when it is needed. Problems to Tackle Before talking about lazy loading of images, I want Continue Reading »
What is AsyncTask AsyncTask is an abstract Android class which helps the Android applications to perform tasks without blocking the UI Thread. AsyncTask is designed to be a helper class around Thread and Handler. Thread Pool Pattern AsyncTask uses a thread pool pattern for running the stuff from doInBackground() The Thread pool Pattern is where number of Continue Reading »
Introduction to Lazy Loading What is lazy loading? A little introduction of lazy loading is it is a design pattern to defer the initialization of an object until the point at which it is needed. In simple words create objects when it is needed. Problems to Tackle Before talking about lazy loading of images, I Continue Reading »
We specify a version of database in SQLiteOpenHelper constructor. Where is this version stored in database? This version is used while upgrading the database to higher versions. It is stored in Database file header as user_version number. See below: Code SQLite Maestro Tool Database header description
iOS Application can be developed for iPhone or iPad or Both (iPhone and iPad). Application that is developed for both is called Universal application. If you have developed application for iPhone only then it will run on iPad but will not run on full screen of iPad. To make this application cover the whole screen you Continue Reading »