End to End Technology Solutions
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 »
In educational applications we often come to a situation when we have to create a user interface for multiple answer type questions. If each question have same number of answers then it can be created very easily by creating a reusable cell in storyboard but what if number of answers in each question varies? 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
We have identified some of the best practices that we need to follow while working on architecture, design and development of iOS applications. We will keep on adding more and more to it. Stay tuned… Best Coding Practices Image files naming convention There are four types of devices that we need to support while developing Continue Reading »
InnovationM is pleased to formalize its’ UX/UI process / framework called “Design Heights” – A Design Innovation Framework from InnovationM. Design Heights is a repository of mobile & web design patterns. InnovationM has collated these patterns over the last 14 months or so based on experience of designing mobile solutions for our clients, internal Continue Reading »
Web services have gained lot of importance lately. From mobile apps perspective, native apps (Andorid, iOS, Windows Phone, etc.) or HTML5/JS Frameworks like Sencha Touch need to talk to the web services to get the data and push the data. How do we ensure that request sent to web services is from authenticated client? For Continue Reading »
The brand new iOS 7 is about to release (18th Sep) and are some major User Interface changes. In fact, Engineers at Apple completely re-did the user interface. The new UI is clean, simple yet amazingly efficient. The animations are subtle yet intuitive. The use of translucency gives user the sense of the context. New Continue Reading »
When application in iOS goes in background (Say, Home button is pressed) then application will not run. In iOS, only specific application types are allowed to run in the background. Let us see them in more detail. Application Types Support for Background in iOS There are 7 types of such applications. See the details below: Continue Reading »
Slider Drawer Pattern In this pattern, small handle or hook is provided on the screen to let the user open. User uses the handle to open a screen. This screen here is the Home Screen that carries navigations points to other places / functionalities in the app. Example – In the screens above, there is a Continue Reading »
Sliding Effect (Parent partially visible) In this example, operator has to be selected. User taps on the field and the screen moves / slides to the left to give space to show the list. Good points: – Parent screen is visible. Very good from UX perspective that user still knows the context where it Continue Reading »
Welcome to the world of Location. We have been talking about Location as an important attribute in mobile apps today. Business people and Developers are talking about it. Have you ever thought as to how a testing of apps based on location can be done? Let us talk about it. This articles flows like this: Continue Reading »
Testing – Facebook integration of the app – requires different combinations of situations and cases to be tested. Ex Login to Application using Facebook when Facebook app is installed on the device. In another case, Facebook app is not installed. Let us go through some of them …. iOS – Login Test Scenarios 1. User Continue Reading »
What is this offering from Android? One Tablet used by multiple users – How can we shield users from seeing each other stuff. Jelly Bean has an answer to it. Just like Windows OS, several user profiles (accounts) can be created on Android from Jelly Bean 4.2 (Tablets only) and onwards versions. This feature abstracts Continue Reading »
Prepare for a new treat… Android is the operating system that powers over 1 billion smartphones and tablets. Since these devices make our lives so sweet, each Android version is named after a desert. As everybody finds it difficult to stay away from chocolate they have decided to name the next version of Android after Continue Reading »