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How to programmatically turn off and turn on WiFi in Kotlin?
This example demonstrates programmatically turning off and turning on WiFi 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.
<?xml version="1.0" encoding="utf-8"?> <RelativeLayout 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" tools:context=".MainActivity"> <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_centerHorizontal="true" android:layout_marginTop="50dp" android:text="Tutorials Point" android:textAlignment="center" android:textColor="@android:color/holo_green_dark" android:textSize="32sp" android:textStyle="bold" /> <Button android:id="@+id/button" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_centerInParent="true" android:onClick="enableWifi" android:text="Wifi On!" /> <Button android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_below="@id/button" android:layout_centerInParent="true" android:onClick="disableWifi" android:text="Wifi Off!" /> </RelativeLayout>
Step 3 − Add the following code to MainActivity.kt
import android.net.wifi.WifiManager
import androidx.appcompat.app.AppCompatActivity
import android.os.Bundle
import android.view.View
import android.widget.Toast
class MainActivity : AppCompatActivity() {
lateinit var wifiManager: WifiManager
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_main)
title = "KotlinApp"
}
fun enableWifi(view: View) {
wifiManager.isWifiEnabled = true
Toast.makeText(this, "Wifi enabled", Toast.LENGTH_SHORT).show()
}
fun disableWifi(view: View) {
wifiManager.isWifiEnabled = false
Toast.makeText(this, "Wifi disabled", Toast.LENGTH_SHORT).show()
}
}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="app.com.q36"> <uses-permission android:name="android.permission.CHANGE_WIFI_STATE" /> <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 −
Click here to download the project code.
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