Programming Tutorials

MainActivity.kt package com.cfsuman.kotlintutorials import android.os.Bundle import android.widget.Button import androidx.appcompat.app.AppCompatActivity import androidx.recyclerview.widget.LinearLayoutManager import androidx.recyclerview.widget.RecyclerView class MainActivity : AppCompatActivity() { private lateinit var context:MainActivity override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) setContentView(R.layout.activity_main) // Get the context context = this; // Get the widgets reference from XML layout val button = findViewById<Button>(R.id.button) val recyclerView = findViewById<RecyclerView>(R.id.recyclerView) // initialize a mutable list of animals val animals = mutableListOf( "Squirrel", "Mouse", "Chameleon", "Deer", "Raccoon", "Antelope", ...

MainActivity.kt package com.cfsuman.kotlintutorials import android.os.Bundle import android.widget.Button import androidx.appcompat.app.AppCompatActivity import androidx.recyclerview.widget.LinearLayoutManager import androidx.recyclerview.widget.RecyclerView class MainActivity : AppCompatActivity() { private lateinit var context:MainActivity override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) setContentView(R.layout.activity_main) // Get the context context = this; // Get the widgets reference from XML layout val btnTop = findViewById<Button>(R.id.btnTop) val btnMiddle = findViewById<Button>(R.id.btnMiddle) val btnBottom = findViewById<Button>(R.id.btnBottom) val recyclerView = findViewById<RecyclerView>(R.id.recyclerView) // initialize a mutable list of animals val animals = mutableListOf( "Horse...

Creating a Horizontal Scrolling List with RecyclerView in Android (Kotlin) This code demonstrates how to create a horizontally scrolling list of items using RecyclerView in an Android application written in Kotlin. The code is divided into three parts: MainActivity.kt: This file defines the main activity of the application. It retrieves data (a list of animal names), sets up the RecyclerView with a horizontal layout manager, and binds the data to a custom adapter class. RecyclerViewAdapter.kt: This file defines the adapter class for the RecyclerView. It inflates a custom view for each item, binds the data to the view, and manages the number of items in the list. Layout XML files: These files define the layouts for the main activity ( activity_main.xml ) and the custom view for each item ( custom_view.xml ). Summary By combining these components, the code creates a RecyclerView that displays a list of animal names horizontally. Users can scroll through the list to see al...

Adding Divider Lines Between RecyclerView Items in Android (Kotlin) This code demonstrates how to display divider lines between items in a RecyclerView using Kotlin in an Android application. It achieves this by utilizing the DividerItemDecoration class provided by the Android framework. Components Breakdown: The code consists of three parts: MainActivity.kt: This file manages the overall activity lifecycle and configures the RecyclerView. RecyclerViewAdapter.kt: This file defines the adapter responsible for populating the RecyclerView with data and displaying individual items. activity_main.xml and custom_view.xml: These XML files define the layout structure for the activity and each item displayed in the RecyclerView. Summary The MainActivity.kt first initializes a list of animal names and sets up the RecyclerView with a LinearLayoutManager for vertical orientation. It then creates an adapter instance with the animal data and sets it on the RecyclerView. Finally, it cr...