How to Turn off, Turn on Wifi in Android

The following code snippet will help you to pragmatically turn on and turn off wi-fi in android. This sample code is using android Switch (Available from android API level 14) to toggle between wi-fi state.

We need following permissions in AndroidMainfest.xml file

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

Creating Layout for On/Off Switch

<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" >

    <ImageView
        android:id="@+id/imageView1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerInParent="true"
        android:src="@drawable/wifi" />

    <Switch
        android:id="@+id/wifi_switch"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentBottom="true"
        android:layout_marginBottom="10dp"
        android:background="@android:color/background_dark"
        android:checked="false"
        android:text="Wi-Fi Settings"
        android:textColor="@android:color/white"
        android:textOff="OFF"
        android:textOn="ON" />

</RelativeLayout>

Turn on or off wifi in Android

We are done with the layout. Now let us move on to turn on wifi pragmatically.  To do this e need to get the Wifi system service by calling getSystemService() method. After getting Wifi manager, we can check the state of WiFi by calling isWiiEnabled() method, before turning on.

package com.example.wifitest;
import android.net.wifi.WifiManager;
import android.os.Bundle;
import android.widget.CompoundButton;
import android.widget.Switch;
import android.widget.Toast;
import android.app.Activity;
import android.content.Context;

public class MainActivity extends Activity {

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);

		Switch toggle = (Switch) findViewById(R.id.wifi_switch);
		toggle.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
			public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
				if (isChecked) {
					toggleWiFi(true);
					Toast.makeText(getApplicationContext(), "Wi-Fi Enabled!", Toast.LENGTH_LONG).show();
				} else {
					toggleWiFi(false);
					Toast.makeText(getApplicationContext(), "Wi-Fi Disabled!", Toast.LENGTH_LONG).show();
				}
			}
		});
	}

	public void toggleWiFi(boolean status) {
		WifiManager wifiManager = (WifiManager) this
				.getSystemService(Context.WIFI_SERVICE);
		if (status == true && !wifiManager.isWifiEnabled()) {
			wifiManager.setWifiEnabled(true);
		} else if (status == false && wifiManager.isWifiEnabled()) {
			wifiManager.setWifiEnabled(false);
		}
	}

}