How to hide a soft keyboard on android after clicking outside EditText using Kotlin?

This example demonstrates how to hide a soft keyboard on android after clicking outside 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 project.
Step 2 − Add the following code to res/layout/activity_main.xml.
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
   xmlns:tools="http://schemas.android.com/tools"
   android:layout_width="match_parent"
   android:layout_height="match_parent"
   android:orientation="vertical"
   android:padding="16dp"
   tools:context="MainActivity">
   <TextView
      android:id="@+id/textView"
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:layout_gravity="center_horizontal"
      android:hint="Enter text here"
      android:textColor="@android:color/background_dark"
      android:textSize="20sp" />
   <EditText
      android:id="@+id/editText"
      android:layout_width="match_parent"
      android:layout_height="wrap_content" />
   <Button
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:layout_gravity="center_horizontal"
      android:onClick="setText"
      android:text="Set Text"
      android:textStyle="bold" />
</LinearLayout>
Step 3 − Add the following code to src/MainActivity.kt
import android.content.Context
import android.os.Bundle
import android.view.View
import android.view.inputmethod.InputMethodManager
import android.widget.EditText
import android.widget.TextView
import androidx.appcompat.app.AppCompatActivity
class MainActivity : AppCompatActivity() {
   lateinit var editText: EditText
   lateinit var textView: TextView
   override fun onCreate(savedInstanceState: Bundle?) {
      super.onCreate(savedInstanceState)
      setContentView(R.layout.activity_main)
      editText = findViewById(R.id.editText)
      textView = findViewById(R.id.textView)
      title = "KotlinApp"
   }
   fun setText(view: View) {
      val newText = editText.text.toString()
      textView.text = newText
      closeKeyBoard()
   }
   private fun closeKeyBoard() {
      val view = this.currentFocus
      if (view != null) {
         val imm = getSystemService(Context.INPUT_METHOD_SERVICE) as InputMethodManager
         imm.hideSoftInputFromWindow(view.windowToken, 0)
      }
   }
}
Step 4 − Add the following code to androidManifest.xml
<manifest xmlns:android="http://schemas.android.com/apk/res/android" package="app.com.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>
      </activity>
   </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