In this short code example I am going to share with you how to concatenate two ArrayList in Java.  Concatenate ArrayList using addAll() function Let’s say we have these two ArrayList(s): List<String> itemsList1 = new ArrayList(Arrays.asList(“One”, “Two”)); List<String> itemsList2 = new ArrayList(Arrays.asList(“Three”, “Four”)); To concatenate the two lists together we can create a new ArrayList, and…

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Below is a very short tutorial on how to create RecyclerView in Kotlin programmatically. RecyclerView is a flexible view for providing a limited window into a large data set and learning how to create and use it make you even better Mobile App Developer :). The Kotlin code example below will cover: Create RecyclerView Create RecyclerAdapter Create a…

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In this short code example in Kotlin I am going to share with you how to create an EditText programmatically and also how to: Add the created EditText in a ConstraintLayout Set hint text for the TextView Set text color Set EditText backgroundColor Layout XML file for the EditText UI component <?xml version=”1.0″ encoding=”utf-8″?> <android.support.constraint.ConstraintLayout xmlns:android=”http://schemas.android.com/apk/res/android”…

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In this tutorial, we will use Kotlin to make a simple Android mobile app that will be able to receive push notifications sent from Firebase. I used to call these kind of messages “push messages” but the correct term for this tutorials will probably be a Firebase Cloud Messaging or the FCM which also stands for Firebase Cloud Messaging.  I…

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