How to close / hide Android Soft Keyboard in Kotlin

In this android kotlin source code example, we are going to close/hide Android Soft Keyboard in Kotlin.

You can copy and adopt this source code example to your Kotlin android project without reinventing the wheel.

Below is a step by step source code to close/hide Android Soft Keyboard in Kotlin.

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".EditText.EditTextActivity6">

    <EditText
        android:id="@+id/edtField"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:hint="Fullname"
        android:layout_marginBottom="10dp"
        app:layout_constraintBottom_toTopOf="@+id/softKeyboard"/>

    <Button
        android:id="@+id/softKeyboard"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:background="@color/colorAccent"
        android:layout_marginLeft="10dp"
        android:layout_marginRight="10dp"
        android:text="Hide SoftKeyBoard"
        android:onClick="edtSoftKeyboard"
        android:textColor="#ffffff"
        android:textStyle="bold"
        android:textSize="15sp"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintBottom_toBottomOf="parent"/>


</androidx.constraintlayout.widget.ConstraintLayout>

MainActivity.kt

import android.content.Context
import androidx.appcompat.app.AppCompatActivity
import android.os.Bundle
import android.view.View
import android.widget.EditText
import com.bluapp.kotlinview.R
import android.content.Context.INPUT_METHOD_SERVICE
import android.util.Log
import android.view.inputmethod.InputMethodManager
import android.widget.Toast
import androidx.core.content.ContextCompat.getSystemService



class EditTextActivity6 : AppCompatActivity() {
    private var edtField : EditText? = null

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_edit_text6)
        edtField = findViewById<EditText>(R.id.edtField) as EditText
    }

    fun edtSoftKeyboard(view: View){
        try {
            val editTextInput = getSystemService(Context.INPUT_METHOD_SERVICE) as InputMethodManager
            editTextInput.hideSoftInputFromWindow(currentFocus!!.windowToken, 0)
        } catch (e: Exception) {
            Log.e("KotlinView", "closeKeyboard: $e")
        }
        Toast.makeText(this@EditTextActivity6, "Result: "+edtField?.text.toString(), Toast.LENGTH_LONG).show()
    }
}

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