In this post we will create a ListView with ViewHolder adapter but we will write the code in Kotlin. For creating xml files for ListView and list items, follow the steps from this post. Next, you have to create a new Kotlin class for the adapter. Name the new created file MyCustomAdapter MyCustomAdapter.kt import android.content.Context import […]
1. Where should we keep constants in Kotlin? if you need constants to be accessed globally use const as top-level properties (not inside a class). In order to do this create a Kotlin file named Constants.kt. The file would look like this: This way you will be able to access the constants from anywhere within the
Intro Since I am a fan of DYI and love gadgets(and IoT), I started to play with a Raspberry Pi and ESP8266 for a while. I had some failing ideas like automating my curtains, after long plans and setup, I abandoned the idea because I couldn’t see a way to make it look nice with
Control flow: for, while, if, when This post is for beginners who want to start learning Kotlin language and already know Java. We will show simple examples of for, while, if, when in both languages, in parallel, for an easier understanding. We will use Log.e in order to print string messages, as from our point of view,
If you search on the internet about how to show a bulleted list from strings.xml using HTML tags, most of the answers will say that you should use a WebView, or to use the bullet symbol directly, or other alternatives. And on some posts I even read that you can’t use <li> tag from HTML
In Android you can specify activity launchMode. You can do this either from AndroidManifest.xml file, either using intents with flags. Some of the flags produce the same effects like those from AndroidManifest.xml, but there are some flags that can be declared only with intents and also there are flags that can be declared only inside
In order to display leaderboards from your game you will have to set up your project and to be signed in. Below you will learn how to do this. Project Setup Download the Android samples from https://github.com/playgameservices/android-basic-samples Import BaseGameUtils into your project as module  Go to the directory where you downloaded android-basic-samples and select libraries -> BaseGameUtils If you get
In Android, if you need to swipe from right to left or vice-versa in order to see different data, you can use a ViewPager. In order to use it, you have to implement a PagerAdapter which will generate the pages that the view shows. ViewPager’s adapters We can use one of the 3 adapters provided:
After trying some libraries in order to make a cube animation for my viewPager, I realized that is pretty easy to do this. Android provides an interface called ViewPager.PageTransformer and you just have to implement its method transformPage(). Below is the code, step by step. activity_main.xml <?xml version=”1.0″ encoding=”utf-8″?> <LinearLayout xmlns:android=”http://schemas.android.com/apk/res/android” xmlns:tools=”http://schemas.android.com/tools” android:layout_width=”match_parent” android:layout_height=”match_parent” tools:context=”ro.helpproject.funcode.help.MainActivity”>
Display HTML format First we will present below what are the supported tags for a textView and what are not supported. You can skip this section if you are already familiar with these or you want to jump directly into action :) Supported tags Unsupported tags <a href=”…”> <b> <big> <blockquote> <br> <cite> <del> <dfn>
Recently, I’ve noticed that there are a few different ways to pass a function as parameter in Kotlin. In this post I will use 2 functions: sum and divide. We have to declare the sum function, in such way that it can receive the divide function as argument. The most common and often more convenient
In this post I will talk about 5 cool things that functions can do in Kotlin, better than methods in Java. Â 1. Forget about overloaded methods In Java, when you need the same method to have 1 parameter in one case and more parameters in another case, you would have to overload the method.
Note! This is a post for beginners in Kotlin language. What are lambdas and anonymous functions? In order to define them let’s see what is a function literal. Function literal Function literal is a function that was not declared, but was passed as an expression. val sum = { a: Int, b: Int -> a + b
In this post, I will try to explain how to write functions in Kotlin by doing a parallel with Java. It’s not rocket science or anything special in this post, but this is the way I understand and remember better how to write in Kotlin, myself (it’s something new to me too :) ), so
