This example demonstrates how to programmatically set drawableLeft on the Android button using Kotlin.Step 1 − Create a new project in Android Studio, go to File ⇒ New Project and fill all required details to create a new project.Step 2 − Add the following code to res/layout/activity_main.xml.             Step 3 − Add the following code to src/MainActivity.ktimport android.graphics.drawable.Drawable import android.os.Bundle import android.widget.Button import androidx.appcompat.app.AppCompatActivity class MainActivity : AppCompatActivity() {    override fun onCreate(savedInstanceState: Bundle?) {       super.onCreate(savedInstanceState)       setContentView(R.layout.activity_main)       title = "KotlinApp"       val button: ... Read More

This example demonstrates how to get the height and width of the Android Navigation Bar programmatically using Kotlin.Step 1 − Create a new project in Android Studio, go to File ⇒ New Project and fill all required details to create a new project.Step 2 − Add the following code to res/layout/activity_main.xml.             Step 3 − Add the following code to src/MainActivity.ktimport android.content.res.Resources import android.os.Bundle import android.widget.TextView import androidx.appcompat.app.AppCompatActivity class MainActivity : AppCompatActivity() {    override fun onCreate(savedInstanceState: Bundle?) {       super.onCreate(savedInstanceState)       setContentView(R.layout.activity_main)       title = "KotlinApp"   ... Read More

This example demonstrates how to set only numeric values for edittext in Android using Kotlin.Step 1 − Create a new project in Android Studio, go to File ⇒ New Project and fill all required details to create a new project.Step 2 − Add the following code to res/layout/activity_main.xml.             Step 3 − Add the following code to src/MainActivity.ktimport android.os.Bundle import android.text.InputType import android.widget.Button import android.widget.EditText import androidx.appcompat.app.AppCompatActivity class MainActivity : AppCompatActivity() {    override fun onCreate(savedInstanceState: Bundle?) {       super.onCreate(savedInstanceState)       setContentView(R.layout.activity_main)       title = "KotlinApp"     ... Read More

This example demonstrates how to create a Dialog Box without a title in Android using Kotlin.Step 1 − Create a new project in Android Studio, go to File ⇒ New Project and fill all required details to create a new project.Step 2 − Add the following code to res/layout/activity_main.xml         Step 3 − Add the following code to src/MainActivity.ktimport android.os.Bundle import android.widget.Toast import androidx.appcompat.app.AlertDialog import androidx.appcompat.app.AppCompatActivity class MainActivity : AppCompatActivity() {    override fun onCreate(savedInstanceState: Bundle?) {       super.onCreate(savedInstanceState)       setContentView(R.layout.activity_main)       title = "KotlinApp"       val builder ... Read More

This example demonstrates how to change the Text color of Menu item in Android using Kotlin.Step 1 − Create a new project in Android Studio, go to File ⇒ New Project and fill all required details to create a new project.Step 2 − Add the following code to res/layout/activity_main.xml.         Step 3 − Add the following code to res/menu/menu_items.xml             Step 4 − Add the following code to res/values/styles.xml                     @color/colorPrimary       @color/colorPrimaryDark       @color/colorAccent   ... Read More

This example demonstrates how to make a specific text on TextView bold in Android using Kotlin.Step 1 − Create a new project in Android Studio, go to File ⇒ New Project and fill all required details to create a new project.Step 2 − Add the following code to res/layout/activity_main.xml         Step 3 − Add the following code to src/MainActivity.ktimport android.graphics.Typeface import android.os.Bundle import android.text.SpannableString import android.text.Spanned import android.text.style.StyleSpan import android.widget.TextView import androidx.appcompat.app.AppCompatActivity class MainActivity : AppCompatActivity() {    override fun onCreate(savedInstanceState: Bundle?) {       super.onCreate(savedInstanceState)       setContentView(R.layout.activity_main)       title = ... Read More

This example demonstrates how to validate Email Address in Android on EditText using Kotlin.Step 1 − Create a new project in Android Studio, go to File ⇒ New Project and fill all required details to create a new projectStep 2 − Add the following code to res/layout/activity_main.xml.             Step 3 − Add the following code to src/MainActivity.ktimport android.os.Bundle import android.widget.Button import android.widget.EditText import android.widget.Toast import androidx.appcompat.app.AppCompatActivity class MainActivity : AppCompatActivity() {    lateinit var button: Button    lateinit var emailId: EditText    var emailPattern = "[a-zA-Z0-9._-]+@[a-z]+\.+[a-z]+"    override fun onCreate(savedInstanceState: Bundle?) {     ... Read More

This example demonstrates how to play YouTube videos in my Android application using Kotlin.Step 1 − Create a new project in Android Studio, go to File ⇒ New Project and fill all required details to create a new project.Step 2 − Add the following code to res/layout/activity_main.xml.     Step 3 − Add the following code to src/MainActivity.ktimport androidx.appcompat.app.AppCompatActivity import android.os.Bundle import androidx.recyclerview.widget.LinearLayoutManager import androidx.recyclerview.widget.RecyclerView import java.util.* class MainActivity : AppCompatActivity() {    private lateinit var recyclerView:RecyclerView    private var youtubeVideos = Vector()    override fun onCreate(savedInstanceState: Bundle?) {       super.onCreate(savedInstanceState)       setContentView(R.layout.activity_main)     ... Read More

This example demonstrates how to detect swipe direction between left/right and up/down in Android using Kotlin.Step 1 − Create a new project in Android Studio, go to File ⇒ New Project and fill all required details to create a new project.Step 2 − Add the following code to res/layout/activity_main.xml.         Step 3 − Add the following code to src/MainActivity.ktimport android.content.Context import android.os.Bundle import android.view.GestureDetector import android.view.MotionEvent import android.view.View import android.widget.Toast import androidx.appcompat.app.AppCompatActivity import kotlin.math.abs class MainActivity : AppCompatActivity() {    var onSwipeTouchListener: OnSwipeTouchListener? = null    override fun onCreate(savedInstanceState: Bundle?) {       super.onCreate(savedInstanceState)   ... Read More

This example demonstrates how to take a screenshot programmatically in Android using Kotlin.Step 1 − Create a new project in Android Studio, go to File ⇒ New Project and fill all required details to create a new project.Step 2 − Add the following code to res/layout/activity_main.xml.         Step 3 − Add the following code to src/MainActivity.ktimport android.graphics.Bitmap import android.graphics.Color import android.os.Bundle import android.view.View import android.widget.Button import android.widget.ImageView import androidx.appcompat.app.AppCompatActivity @Suppress("DEPRECATION") class MainActivity : AppCompatActivity() {    private lateinit var main: View    private lateinit var imageView: ImageView    override fun onCreate(savedInstanceState: Bundle?) {       ... Read More