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This example demonstrates how to validate EditText input 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.InputFilter import android.text.Spanned import android.widget.EditText import android.widget.TextView import androidx.appcompat.app.AppCompatActivity import kotlinx.android.synthetic.main.activity_main.* import java.util.regex.Matcher import java.util.regex.Pattern class MainActivity : AppCompatActivity() { private lateinit var textView: TextView override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) ... Read More
This example demonstrates how to check if Location Services are enabled in Android App 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.location.LocationManager import android.os.Bundle import android.widget.Button import android.widget.TextView import androidx.appcompat.app.AppCompatActivity class MainActivity : AppCompatActivity() { var gpsStatus: Boolean = false private lateinit var textView: TextView override fun onCreate(savedInstanceState: Bundle?) { ... Read More
This example demonstrates how to create a circular ProgressBar 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 − Create a drawable resource file (circularprogressbar.xml) and add the following code android:layout_width="wrap_content" android:layout_height="wrap_content"> ... Read More
This example demonstrates how to detect click on HTML buttons through javascript in Android WebView using Kotlin.This example demonstrates how to detect click on HTML buttons through javascript in Android WebView 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 create a file.htm and add the following code − First name: Last name: function getValues() { ... Read More
This example demonstrates how to make a phone call using intent in Android using KotlinStep 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.net.Uri 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 to turn an Android device screen on and off 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.app.admin.DevicePolicyManager import android.content.ComponentName import android.content.Context import android.content.Intent import android.os.Bundle import android.view.View import android.widget.Button import android.widget.Toast import androidx.annotation.Nullable import androidx.appcompat.app.AppCompatActivity class MainActivity : AppCompatActivity() { private val enableResult = 1 ... Read More
This example demonstrates how to resize Image in an Android App 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.app.Activity import android.content.Intent import android.graphics.Bitmap import android.net.Uri import android.os.Bundle import android.provider.MediaStore import android.view.View import android.widget.ImageView import androidx.appcompat.app.AppCompatActivity import java.io.IOException class MainActivity : AppCompatActivity() { lateinit var imageView: ImageView private val pickImage = ... Read More
This example demonstrates how to change a TextView's style at runtime 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 in res/values/styles.xml bold|italic #FFFFFF normal #C0C0C0 Step 4 − Add the following code in res/values/colors.xml @android:color/holo_green_light @android:color/holo_red_dark Step ... Read More
This example demonstrates how to send a notification from a service 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 android.widget.EditText import androidx.appcompat.app.AppCompatActivity import androidx.core.content.ContextCompat class MainActivity : AppCompatActivity() { lateinit var editText: EditText override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) setContentView(R.layout.activity_main) ... Read More
This example demonstrates how to use glide to download an image into a bitmap using KotlinStep 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.drawable.Drawable import android.os.Bundle import android.widget.ImageView import androidx.annotation.Nullable import androidx.appcompat.app.AppCompatActivity import com.bumptech.glide.Glide import com.bumptech.glide.request.target.CustomTarget import com.bumptech.glide.request.transition.Transition; class MainActivity : AppCompatActivity() { lateinit var imageView: ImageView override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) ... Read More