Found 417 Articles for Kotlin

This example demonstrates how to display a list view in an Android Alert Dialog.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.view.View import android.widget.ArrayAdapter import android.widget.ListView import android.widget.Toast import androidx.appcompat.app.AlertDialog import androidx.appcompat.app.AppCompatActivity class MainActivity : AppCompatActivity() {    var country = arrayOf(       "India", "Brazil", "Argentina",       "Portugal", "France", "England", "Italy"    )   ... Read More

This example demonstrates how to start Service using Alarmmanager in Kotlin Android.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.app.AlarmManager import android.app.PendingIntent import android.content.Context import android.content.Intent import android.os.Bundle import android.widget.Button import android.widget.Toast import androidx.appcompat.app.AppCompatActivity import java.util.* class MainActivity : AppCompatActivity() {    private lateinit var btnStart: Button    private lateinit var btnStop: Button    lateinit var pendingIntent: PendingIntent ... Read More

This example demonstrates how to pass an image from one activity to another activity 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.Intent import android.os.Bundle import android.view.View import androidx.appcompat.app.AppCompatActivity class MainActivity : AppCompatActivity() {    override fun onCreate(savedInstanceState: Bundle?) {       super.onCreate(savedInstanceState)       setContentView(R.layout.activity_main)       title = "KotlinApp"    }    fun ... Read More

This example demonstrates how Save, edit, retrieve, delete shared preference data 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 src/MainActivity.ktimport android.content.Context import android.content.SharedPreferences import android.os.Bundle import android.view.View import android.widget.EditText import android.widget.TextView import android.widget.Toast import androidx.appcompat.app.AppCompatActivity @Suppress("NULLABILITY_MISMATCH_BASED_ON_JAVA_ANNOTATIONS") class MainActivity : AppCompatActivity() {    var editTextName: EditText? = ... Read More

This example demonstrates how to use marquee text in an Android Kotlin App.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 android.widget.TextView class MainActivity : AppCompatActivity() {    override fun onCreate(savedInstanceState: Bundle?) {       super.onCreate(savedInstanceState)       setContentView(R.layout.activity_main)       title = "KotlinApp"       val text: String = "Simple application that shows how ... Read More

This example demonstrates how to draw a smooth line following my finger using Android 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.Canvas import android.graphics.Color import android.graphics.Paint import android.os.Bundle import android.view.MotionEvent import android.view.View import android.widget.ImageView import androidx.appcompat.app.AppCompatActivity class MainActivity : AppCompatActivity(), View.OnTouchListener {    private lateinit var imageView: ImageView    private var bitmap: Bitmap? = null    var ... Read More

This example demonstrates how to send data from one Fragment to another 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 two FragmentActivity and add the codes which are given below.fragmentOne.xml −         FirstFragment.kt −import android.os.Bundle import android.view.LayoutInflater import android.view.View import android.view.ViewGroup import androidx.fragment.app.Fragment import kotlinx.android.synthetic.main.fragment_one.view.* class FirstFragment : Fragment() {    private lateinit var communicator: Communicator    override fun onCreateView(       inflater: LayoutInflater, ... Read More

This example demonstrates how to use a simple SQLite database in Kotlin android.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.                                    

This example demonstrates how to get the current time and date in an Android app 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.TextView import androidx.appcompat.app.AppCompatActivity import java.text.SimpleDateFormat import java.util.* class MainActivity : AppCompatActivity() {    override fun onCreate(savedInstanceState: Bundle?) {       super.onCreate(savedInstanceState)       setContentView(R.layout.activity_main)       val textView: TextView = findViewById(R.id.dateAndTime)       ... Read More

This example demonstrates how to handle swipe gestures in an android device 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.ktpackage app.com.kotlinapp import android.os.Bundle import android.widget.RelativeLayout import android.widget.Toast import androidx.appcompat.app.AppCompatActivity class MainActivity : AppCompatActivity() {    private lateinit var layout: RelativeLayout    override fun onCreate(savedInstanceState: Bundle?) {       super.onCreate(savedInstanceState)       setContentView(R.layout.activity_main)       layout = findViewById(R.id.relativeLayout)   ... Read More