How to Enable Disable WiFi programmatically in android on button click.

Add all these three permissions inside your AndroidManifest.xml file.

 <uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
 <uses-permission android:name="android.permission.INTERNET" />
 <uses-permission android:name="android.permission.CHANGE_WIFI_STATE" />

Code for MainActivity.java file.

 package com.enabledisablewifiprogrammatically_android_examples.com;

import android.app.Activity;
import android.content.Context;
import android.net.wifi.WifiManager;
import android.os.Bundle;
import android.widget.CompoundButton;
import android.widget.Switch;
import android.widget.TextView;

public class MainActivity extends Activity {

 Switch WiFiButton;
 TextView textview;
 WifiManager wifimanager;
 @Override
 protected void onCreate(Bundle savedInstanceState) {
 super.onCreate(savedInstanceState);
 setContentView(R.layout.activity_main);
 
 textview = (TextView)findViewById(R.id.textView1);
 
 WiFiButton = (Switch)findViewById(R.id.switch1);
 
 WiFiButton.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
 
 @Override
 public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
 // TODO Auto-generated method stub
 
 if(isChecked)
 {
 textview.setText("WiFi ON");
 
 EnableWiFi() ;
 
 }
 else {
 textview.setText("WiFi OFF");
 
 DisableWiFi();
 
 }
 }
 });
 }
 
 public void EnableWiFi(){
 
 wifimanager = (WifiManager) getSystemService(Context.WIFI_SERVICE);
 wifimanager.setWifiEnabled(true);
 
 }
 
 public void DisableWiFi(){
 
 wifimanager = (WifiManager) getSystemService(Context.WIFI_SERVICE);
 wifimanager.setWifiEnabled(false);
 
 }
 
}

Code for activity_main.xml file.

<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"
 android:paddingBottom="@dimen/activity_vertical_margin"
 android:paddingLeft="@dimen/activity_horizontal_margin"
 android:paddingRight="@dimen/activity_horizontal_margin"
 android:paddingTop="@dimen/activity_vertical_margin"
 tools:context="com.enabledisablewifiprogrammatically_android_examples.com.MainActivity" >

 <Switch
 android:id="@+id/switch1"
 android:layout_width="wrap_content"
 android:layout_height="wrap_content"
 android:layout_centerHorizontal="true"
 android:layout_centerVertical="true"
 />

 <TextView
 android:id="@+id/textView1"
 android:layout_width="wrap_content"
 android:layout_height="wrap_content"
 android:layout_above="@+id/switch1"
 android:layout_centerHorizontal="true"
 android:layout_marginBottom="42dp"
 android:text="WiFi OFF"
 android:textAppearance="?android:attr/textAppearanceLarge" />
 
</RelativeLayout>

Code for AndroidManifest.xml file.

 <?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
 package="com.enabledisablewifiprogrammatically_android_examples.com"
 android:versionCode="1"
 android:versionName="1.0" >

 <uses-sdk
 android:minSdkVersion="14"
 android:targetSdkVersion="21" />
 
 <uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
 <uses-permission android:name="android.permission.INTERNET" />
 <uses-permission android:name="android.permission.CHANGE_WIFI_STATE" />

 <application
 android:allowBackup="true"
 android:icon="@drawable/ic_launcher"
 android:label="@string/app_name"
 android:theme="@style/AppTheme" >
 <activity
 android:name=".MainActivity"
 android:label="@string/app_name" >
 <intent-filter>
 <action android:name="android.intent.action.MAIN" />

 <category android:name="android.intent.category.LAUNCHER" />
 </intent-filter>
 </activity>
 </application>

</manifest>

Screenshots: