How do I connect to a Wi-Fi network on Android programmatically using Kotlin?

This example demonstrates how to connect to a Wi-Fi network on Android 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.

<?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:id="@+id/activity_main"    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="70dp"       android:background="#008080"       android:padding="5dp"       android:text="TutorialsPoint"       android:textColor="#fff"       android:textSize="24sp"       android:textStyle="bold" />    <Switch       android:id="@+id/switchWifi"       android:layout_width="wrap_content"       android:layout_height="wrap_content"       android:layout_centerInParent="true" />    <TextView       android:id="@+id/textView"       android:layout_width="wrap_content"       android:layout_height="wrap_content"       android:layout_above="@+id/switchWifi"       android:layout_centerHorizontal="true"       android:layout_marginBottom="30dp"       android:text="WiFi OFF"       android:textColor="@android:color/background_dark"       android:textSize="24sp"       android:textStyle="bold|italic" /> </RelativeLayout> 

Step 3 − Add the following code to src/MainActivity.kt

import android.content.Context import android.net.wifi.WifiManager import android.os.Bundle import android.widget.Switch import android.widget.TextView import android.widget.Toast import androidx.appcompat.app.AppCompatActivity @Suppress("DEPRECATION") class MainActivity : AppCompatActivity() {    private lateinit var wifiButton: Switch    lateinit var textView: TextView    lateinit var wifiManager: WifiManager    override fun onCreate(savedInstanceState: Bundle?) {       super.onCreate(savedInstanceState)       setContentView(R.layout.activity_main)       title = "KotlinApp"       textView = findViewById(R.id.textView)       wifiButton = findViewById(R.id.switchWifi)       wifiButton.setOnCheckedChangeListener { _, isChecked -> // TODO Auto-generated method stub if (isChecked) {             textView.text = "WIFI ON"             enableWiFi()          }          else {             textView.text = "WIFI OFF"             disableWiFi()          }       }    }    private fun disableWiFi() {       wifiManager = applicationContext.getSystemService(Context.WIFI_SERVICE) as WifiManager wifiManager.isWifiEnabled = false       Toast.makeText(this, "Wifi Disabled", Toast.LENGTH_SHORT).show()    }    private fun enableWiFi() {       wifiManager = applicationContext.getSystemService(Context.WIFI_SERVICE) as WifiManager wifiManager.isWifiEnabled = true       Toast.makeText(this, "Wifi Enabled", 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="com.example.q11"> <uses-permission android:name="android.permission.ACCESS_WIFI_STATE" /> <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.