This example demonstrates how to Create a listView with a checkBox in 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.Example Step 3 − Add the following code to src/MainActivity.ktExampleimport android.view.View import android.widget.AdapterView.OnItemClickListener import android.widget.ListView import androidx.appcompat.app.AppCompatActivity import java.util.* class MainActivity : AppCompatActivity() {    private var dataModel: ArrayList? = null    private lateinit var listView: ListView    private lateinit var adapter: CustomAdapter    override fun onCreate(savedInstanceState: Bundle?) {       super.onCreate(savedInstanceState) ... Read More

This example demonstrates how to Add and Remove Views in Android Dynamically in 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.Example                           Step 3 − Add the following code to src/MainActivity.ktExampleimport android.content.Context import android.os.Bundle import android.view.LayoutInflater import android.view.View import android.widget.LinearLayout import androidx.appcompat.app.AppCompatActivity class MainActivity : AppCompatActivity() {    private var parentLinearLayout: LinearLayout? = null   ... Read More

This example demonstrates how to set the Android wallpaper image programmatically in 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.Example Step 3 − Add the following code to src/MainActivity.ktExampleimport android.graphics.Bitmap import android.graphics.BitmapFactory import androidx.appcompat.app.AppCompatActivity import android.os.Bundle import android.view.View import android.widget.Toast class MainActivity : AppCompatActivity() {    override fun onCreate(savedInstanceState: Bundle?) {       super.onCreate(savedInstanceState)       setContentView(R.layout.activity_main)       title = "KotlinApp"    }    fun setWallpaper(view: View) {       val bitmap: Bitmap ... Read More

This example demonstrates how to use ArrayAdapter in android to create a simple listview in 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 MainActivity.ktimport android.os.Bundle import android.widget.ArrayAdapter import android.widget.ListView import androidx.appcompat.app.AppCompatActivity class MainActivity : AppCompatActivity() {    override fun onCreate(savedInstanceState: Bundle?) {       super.onCreate(savedInstanceState)       setContentView(R.layout.activity_main)       title = "KotlinApp"       val arrayAdapter: ArrayAdapter     ... Read More

This example demonstrates how to get Spinner value in 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 − Open res/strings.xml and add the following code −    Q39           crane       Cuckoo       Pigeon       Eagle       Owl       Vulture       WoodPecker     Step 4 − Add the ... Read More

This example demonstrates how to use SearchView in the Toolbar in 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 − Open res/strings.xml and add the following code−    Q38           January       February       March       April       May       June       July       August     ... Read More

This example demonstrates programmatically turning off and turning on WiFi in 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 MainActivity.ktimport android.net.wifi.WifiManager import androidx.appcompat.app.AppCompatActivity import android.os.Bundle import android.view.View import android.widget.Toast class MainActivity : AppCompatActivity() {    lateinit var wifiManager: WifiManager    override fun onCreate(savedInstanceState: Bundle?) {       super.onCreate(savedInstanceState)       setContentView(R.layout.activity_main)       title = "KotlinApp" ... Read More

This example demonstrates how to add Google Search Functionality in 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 MainActivity.ktimport android.app.SearchManager import android.content.Intent import android.os.Bundle import android.widget.Button import android.widget.EditText import androidx.appcompat.app.AppCompatActivity class MainActivity : AppCompatActivity() {    lateinit var editText: EditText    lateinit var btnSearch: Button    override fun onCreate(savedInstanceState: Bundle?) {       super.onCreate(savedInstanceState)       ... Read More

This example demonstrates how to integrate Facebook 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 − In your project, open your_app | Gradle Scripts | build.gradle (Module: app) and add the following compile statement to the dependencies{} section to compile the latest version of the SDK −implementation 'com.facebook.android:facebook-login:5.15.3'Step 3 − Add your package name and default activity class name as shown below, click save and continue.Step 4 − Create a Key hash. Based on your operating system you have to copy ... Read More

This example demonstrates how to play videos in Android TextureView 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 − Create an asset folder and copy-paste the video into the asset folder.Step 4 − Add the following code to MainActivity.ktimport android.content.res.AssetFileDescriptor import android.graphics.SurfaceTexture import android.media.MediaPlayer import android.media.MediaPlayer.OnVideoSizeChangedListener import android.os.Build import android.os.Bundle import android.view.Surface import android.view.TextureView import android.view.TextureView.SurfaceTextureListener import androidx.appcompat.app.AppCompatActivity import java.io.IOException class MainActivity : AppCompatActivity(), SurfaceTextureListener, OnVideoSizeChangedListener {    private ... Read More