How to take a screenshot programmatically in Android using Kotlin?

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.
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
   android:id="@+id/main"
   style="?attr/actionButtonStyle"
   android:layout_width="match_parent"
   android:layout_height="match_parent">
   <Button
      android:id="@+id/button"
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:layout_centerHorizontal="true"
      android:layout_marginTop="30dp"
      android:text="Take screenshot" />
   <ImageView
      android:id="@+id/imageView"
      android:layout_width="match_parent"
      android:layout_height="match_parent"
      android:layout_below="@id/button"
      android:layout_centerHorizontal="true"
      android:layout_marginTop="30dp"
      android:scaleType="fitCenter" />
</RelativeLayout>
Step 3 − Add the following code to src/MainActivity.kt
import 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?) {
      super.onCreate(savedInstanceState)
      setContentView(R.layout.activity_main)
      title = "KotlinApp"
      main = findViewById(R.id.main)
      imageView = findViewById(R.id.imageView)
      val btn: Button = findViewById(R.id.button)
      btn.setOnClickListener {
         val b: Bitmap = Screenshot.takeScreenshotOfRootView(imageView)
         imageView.setImageBitmap(b)
         main.setBackgroundColor(Color.parseColor("#999999"))
      }
   }
   companion object Screenshot {
      private fun takeScreenshot(view: View): Bitmap {
         view.isDrawingCacheEnabled = true
         view.buildDrawingCache(true)
         val b = Bitmap.createBitmap(view.drawingCache)
         view.isDrawingCacheEnabled = false
         return b
      }
      fun takeScreenshotOfRootView(v: View): Bitmap {
         return takeScreenshot(v.rootView)
      }
   }
}
Step 4 − Add the following code to androidManifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
   package="com.example.q11">
   <application
      android:allowBackup="true"
      android:icon="@mipmap/ic_launcher"
      android:label="@string/app_name"
      android:roundIcon="@mipmap/ic_launcher_round"
      android:supportsRtl="true"
      android:theme="@style/AppTheme">
      <activity android:name=".MainActivity">
         <intent-filter>
            <action android:name="android.intent.action.MAIN" />
            <category android:name="android.intent.category.LAUNCHER" />
         </intent-filter>
      </activityv
   </application>
</manifest>
Let's try to run your application. I assume you have connected your actual Android Mobile device with your computer. To run the app from android studio, open one of your project's activity files and click the Run  icon from the toolbar. Select your mobile device as an option and then check your mobile device which will display your default screen