The distance between two array values is the number of indices between them. Given , find the minimum distance between any pair of equal elements in the array. If no such value exists, return -1. Example arr = [3, 2, 1, 2, 3]; Minimum Distance = 2 (Distance between 2’s)
Let’s learn how to implement MVVM in Android. It’s actually really simple. ViewModel is just another class that that implements the main Business Logic. ViewModel is a middle man between your view and your Data class(Repo/any Data Provider). It can be represented simply like this. Here the View just displays the data. ViewModel doesn’t know… Read More »
Questions How can we create dynamic forms in Flutter? How can we access data from dynamic Forms? Watch Video Tutorial So let’s create a simple dynamic layout We are gonna create a dynamic layout with one TexField when we tap on a plus button in the AppBar. So this is how our AppBar is going… Read More »
In this article, we will see how we can use BLoc to Theme your app in Flutter. To understand BLoC with a real world example, you can refer to my previous post on BLoC here. Part 1 Part 1 For this demo also we will need the below plugins If you follow my previous tutorial,… Read More »
In this article we will learn BLoc pattern in flutter for State Management with a simple real world example. Watch Video Tutorial For this example, we will try to consume a web service. The service we are going to use is https://jsonplaceholder.typicode.com/albums What BLoc does? BLoc helps to separate you presentation and business logic. So… Read More »
In this article we are gonna talk about how to use YouTube API’s and play YouTube videos in Flutter. Watch Video Tutorial Add Dependencies Open pubspec.yaml file in your Flutter project and add below dependencies Now, Let’s create two screens Home Screen Video Player Screen In the HomeScreen we will show the list of videos.… Read More »
We will be talking about how to reuse widgets and create custom reusable AppBars in this article. It’s so easy in flutter. Composing widgets and making it a more powerful and reusable one is so much easy in flutter. Watch Video Tutorial Let’s start at one of the wrong ways that beginners used to do.… Read More »
Hello everyone, In this article we will learn how to show local notifications in Flutter. What we are going to learn? Show Simple notifications Show Repeated Notifications Show Scheduled Notifications Show Notifications at a particular time and day of a week Show Notification with an attachment Show Notifications with HTML content Cancel a Notification. Cancel… Read More »
We all at sometime have played audio in our apps, correct? But we may not have created a complete music player that will run even if the application is not running in the foreground, yes? Watch Video Tutorial So in this article we will see how we can easily create such a music player. Our… Read More »
In this article, we will how to select an image by capturing from camera or gallery, then we will save the image in app’s temporary directory in a separate thread and then load it from there. Watch Video Tutorial For this demo we need three packages. Add Dependencies Open pubspec.yaml file and then add the… Read More »
In this article we will see how we can create a chat application in flutter using Socket IO node js server. For this we need to have a server installed with Node js Socket IO and related dependencies So let’ start with Flutter. Here we need three screens Login screen Chat Users List screen Chat… Read More »
Hi, This article might be an important one for people who are new into Flutter and others too. I am going to explain about a simple thing here. How do you parse complex JSON in Flutter into Dart classes. Of-course there are libraries in Dart to do that. But that requires an extra bit of… Read More »
With Providers and MultiProviders we can do easy StateManagement in Flutter. State Management in Flutter Watch Video Tutorial Add Dependencies First Go to your pubspec.yaml file add the below dependency, I would recommend to add the latest dependency version, at this moment it is 4.0.4 provider: ^4.0.4 The Providers will have Change Notifiers Consumers The Basic… Read More »
Today’s video will let you know how to create sockets in Flutter to make bi-directional communication possible. First we will go with the ‘IOWebSocketChannel‘ class. Watch Video Tutorial You can read about IOWebSocketChannel by following this link. Let’s use the Official Sample first. Create a new file SocketDemo.dart and add the below code into it.… Read More »
Wrap widget is such a useful widget in many circumstances. Watch Video Tutorial First Let’s create a Chip Widget. The above code creates a Chip widget and you can add it to the UI as you want. If we add it inside a row…then this happens… But we want the chips that overflow to be… Read More »
This article will show how to send push notifications in Flutter using Firebase. We will start with Android. Add Dependency For sending push notifications we use a plugin called firebase_messaging… https://pub.dev/packages/firebase_messaging Open your pubspec.yaml file and add this dependency Firebase Account Make sure you have a firebase account before proceeding. Once you have created your… Read More »
This article will help you to understand what are extension methods and what is the use of extension methods. Extension functions can be added to classes which are already compiled. So if you want to extend a library which is already added in your app, you can make use of Extension methods. Watch Video Tutorial… Read More »
In this article, we will see how to theme our apps in Flutter. As you know Google and Apple has released Dark Mode and Light Modes in their latest OS releases in Android 10 and iOS 13. So we have to make sure that our apps works perfectly when the user switch modes in their… Read More »
In Today’s article, we are going to see how to work with FlatLists in React Native and We will add a search bar as a header to the FlatList and filter the list, Also we will see what are spread operators and how to work with them. Note: Make sure that you install react-native-elements package.… Read More »
Today we will see how we can properly handle errors and exceptions in Flutter. Watch Video Tutorial For this example we will be doing a service call and handle exceptions related to that. We will create a sample service here In the above example we are catching all exceptions using a simple try catch block… Read More »
Watch Video Tutorial Navigate using Push Normally if we want to navigate from one screen to another we would use Navigate.push, like in the code below And if we want to send parameters, then one of the way to do this is like below Here SecondScreen is another screen that extends StatelessWidget or StatefulWidget which… Read More »
Add Dependencies The first thing is to add the plugins in the pubspec.yaml file. We need 4 plugins for this demo. http package – to get the Feed webfeed – to parse the RSS/Atom Feed cached_network_image – to cache the images url_launcher – to open the feed url in a browser Your pubspec.yaml file should… Read More »
In this article we will see how to use a nice plugin called FlushBox in Flutter. Watch Video Tutorial First thing to do is to add dependencies. Add Dependencies Go to your pubspec.yaml file and add the below dependency. Once done that run ‘flutter packages get’ in the terminal to download the packages to be… Read More »
This demo will show how can we Launch urls in a browser outside the App Launch urls in a browser inside the App Launch Installed app (eg:youtube) Make Phone Call. Watch Video Tutorial Add Dependencies To make all this work, we need the url launcher plugin. Open the pubspec.yaml file in your project and add… Read More »
This article will show you how to share data from our application to another, just like when you hit share on an image inside your gallery. The system will ask you to select an application to share to. Watch Video Tutorial So we are going to achieve this in Flutter with the help… Read More »