What is Context in Android and What is the proper way to use it?
Lets see what a Context is… Context : Current State of the application. Context : Handle of the application. Context : Provides access to the resources, preferences, accessing database etc. Activity inherits from the Context. Context is the most important part of the Android application and its everywhere. If you wrongly use Context, it can lead to memory… Read More »
Using WKWebkit in iOS – Simple Example
Whenever you want to show a webpage in your iOS App, use WKWebview instead of UIWebview. You have to supply an url that is complete. ie. with “http” or “https”. If you are using “http”, make sure you enable the “App Transport Security Settings” and add “Allow Arbitrary Loads” to yes. Our Final output will look… Read More »
Interview Question – 12 – Bon Appétit
How to use Theme in a Flutter App?
In this article, I will tell you a simple way to theme a flutter app. Here is a simple code that illustrates that. We use the theme property of each widget to theme it. For example, to theme the whole application, we would do something like this. Take a look at the theme property of the MaterialApp. You… Read More »
Prompt users to rate your app in iOS with StoreKit.
Apple has introduced a new API to allow developers to prompt users with rate their apps directly from the app. Old way In the old way, we used to redirect users to the Appstore with the app’s link to rate the app. This makes users to navigate out of the app. This was not an efficient way to… Read More »
How to configure Firebase Google-Services.json for different targets in iOS?
Once you have different Google-Services.json for different targets for your firebase applications, you may be wondering how all can have same filenames and configure for different targets. However the solution is simple. Initial Steps * Create new directory for each directory inside for project folder. Make sure the folder name is different from the target name (you can… Read More »
Breaking Records – Problem Solving Question & Answer
Using Content Resolver to List Contacts – Android
Here is a simple example to list contacts in android using the Content Resolver. Note : You need to have two things before accessing contacts. 1. Contacts Permission in the Android Manifest 2. Ask Runtime permission from the user Code Here is our MainActivity that lists the contacts. MainActivity.java Adapter Class Below is the adapter class for the… Read More »
Toast at the center of the screen – Android Tip # 2
Hide Navigation – Android Tip – 1
RNFirebase core module was not found natively on ios – Fix
This issue happens in react-native-firebase for a various reasons. First thing you have to do is check Firebase/Core is in your pods. Try Cleaning and rebuilding your project. Click on the target you are running in xcode and check the frameworks section in ‘General’ Tab -> Check you have linked libFirebase.a there. If not click the “+” button… Read More »
Interview Question & Answers – Migratory Birds Count – 11
Question You have been asked to help study the population of birds migrating across the continent. Each type of bird you are interested in will be identified by an integer value. Each time a particular kind of bird is spotted, its id number will be added to your array of sightings. You would like to be able to… Read More »
Interview Question & Answer – 10 – Divisible Sum pairs
Question Find the count where the number k is divisible by sum of two numbers in the array and first number index should be less than second number index. Function has the following parameter(s): n: the integer length of array ar: an array of integers k: the integer to divide the pair sum by You can download the… Read More »
Interview Question – 9
Question Maria plays college basketball and wants to go pro. Each season she maintains a record of her play. She tabulates the number of times she breaks her season record for most points and least points in a game. Points scored in the first game establish her record for the season, and she begins counting from there. For… Read More »
Doing Simple Navigation in Flutter – Simple Example
Navigation is done is Flutter using the Navigator class. Lets look at a simple example The first thing you have to register routes for difference screen is to build a Map of ‘String’ (route) and the page (Widget). Lets say I have a utility class for the Creating Routes named routes.dart. The contents of route.dart contains the… Read More »
GridView Demo in Flutter
Hi Friends, Today we will see how to implement GridView in Flutter. We are going to use this service for the data First we will create a Model for the Grid Cell No we will create view for Grid Cell Create a file named “cell.dart” and copy this into it. Service Class We have the below… Read More »
Interview Question & Answer – 9
Interview Question & Answer – 8
Question You are in charge of the cake for your niece’s birthday and have decided the cake will have one candle for each year of her total age. When she blows out the candles, she’ll only be able to blow out the tallest ones. Your task is to find out how many candles she can successfully blow out.… Read More »
Doing HTTP Calls in Flutter and Parsing Data
Here is a simple example of doing Http calls in Flutter. In this example we will try to fetch some JSON value from the below url https://jsonplaceholder.typicode.com/posts/1 You can read more from here. Add Dependencies First you need to add the http plugin in dependencies. The latest version of http can be found here (https://pub.dartlang.org/packages/http). Example Lets look… Read More »
Interview Question & Answer – 7
Flutter – Saving Data in Local using Shared Preferences
This simple example demonstrates saving an integer value in the local shared preferences. We will use a flutter plugin called shared_preferences for this. You can read more about the plugin from here. Add Dependency First thing is to add the package to the dependencies. Go to pubspec.yaml and add the package. Example
Interview Question & Answer – 6
Interview Question & Answer – 5
Question Alice and Bob each created one problem for our company. A reviewer rates the two challenges, awarding points on a scale from to for three categories: problem clarity, originality, and difficulty. We define the rating for Alice’s challenge to be the triplet , and the rating for Bob’s challenge to be the triplet . Your task is… Read More »
Interview Question & Answer – 4
Question Lilah has a string, , of lowercase English letters that she repeated infinitely many times. Given an integer, , find and print the number of letter a’s in the first letters of Lilah’s infinite string. For example, if the string and , the substring we consider is , the first characters of her infinite string. There are… Read More »
