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Lists and Grids in Android with RecyclerView Kotlin Tutorial

RecyclerView is a ViewGroup added to the android studio as a successor of the GridView and ListView. It has been created to make possible construction of any lists with XML layouts as an item that can be customized vastly while improving on the efficiency of ListViews and GridViews. Getting Started To implement a basic RecyclerView Two sub-parts are needed to be constructed which offer the users the degree of control they require in making varying designs of their choice. 1.The ViewHolder: The ViewHolder is a java class that stores the reference to the card layout views that have to be dynamically modified during the execution of the program by a list of data obtained either by online databases or added in some other way. 2.The Data Class: The Data class is a custom java class that acts as a structure for holding the information for every item of the RecyclerView. Implementation of the RecyclerView: In the activity_main.xml file in layout directory, add the RecyclerView widget. <?
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Android Spinner using Kotlin

 In this example, we’ll be implementing Material Spinners in our Android Application using Kotlin. Android Spinner is used to create a drop-down list on the screen. What is Android Spinner? Spinners provide a quick way to select one value from a list. In the default state, a spinner shows its currently selected value. Touching the spinner displays a dropdown menu with all other available values, from which the user can select a new one. You can add a spinner to your layout with the  Spinner  object. You should usually do so in your XML layout with a  <Spinner>  element. For example: <Spinner     android:id = "@+id/planets_spinner"     android:layout_width = "match_parent"     android:layout_height = "wrap_content" /> Spinner Callback Events  AdapterView.onItemSelectedListener interface is used to trigger the Spinner click event callbacks.  It consists of two methods:   1.onItemSelected   2.onNothingSelected XML Layout Code The code for the act
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Android EditText with Examples in Kotlin

In Android, EditText is a standard entry widget. A user interface element for entering and modifying text. When you define an edit text widget, you must specify the R.styleable.TextView_inputType attribute. For example, for plain text input set inputType to " text ", In case if EditText field is for password, then we need to specify the inputType as “ textPassword ”. <EditText android:id= "@+id/plain_text_input" android:layout_height= "wrap_content" android:layout_width= "match_parent" android:inputType= "text" /> See the Text Fields guide for examples of other R.styleable.TextView_inputType settings. Text Fields in Android Studio are basically EditText and we drag and drop or we can create edittext.  First, we will check the drag and drop option here EditText instance by declaring it inside a layout XML file <EditText android:id= "@+id/plain_text_input" android:layout_height= &
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Android Hello World Kotlin App for Beginners

In this tutorial, we will learn how to create a Hello World Android app in Kotlin  on Android studio using Kotlin programming language. Start Hello World Android Application by starting Android Studio . Select the Activity type and click next. Setup Project Provide an application name ('Hello World' in my case) and check 'Include Kotlin support ' and proceed also  Select Minimum SDK for android application and click finish. Kotlin Android App Project Structure Look at XML design layout Android Hello World Kotlin Code Let’s look at the layout file i.e.  activity_main.xml  looks like: <?xml version="1.0" encoding="utf-8"?> <androidx.constraintlayout.widget.ConstraintLayout xmlns:android= "http://schemas.android.com/apk/res/android" xmlns:app= "http://schemas.android.com/apk/res-auto" xmlns:tools= "http://schemas.android.com/tools" android:layout_width= "match_parent" android:layout
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