Get Wifi IP of Android device, using WifiManager

It's a simple exercise to retrieve my Wifi Ip address using WifiManager.



main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
   android:orientation="vertical"
   android:layout_width="fill_parent"
   android:layout_height="fill_parent"
   >
<TextView 
   android:layout_width="fill_parent"
   android:layout_height="wrap_content"
   android:text="@string/hello"
   />
  
<TextView 
   android:layout_width="fill_parent"
   android:layout_height="wrap_content"
   android:text="My WifiManager:"
   />
<TextView 
   android:id="@+id/WifiManager"
   android:layout_width="fill_parent"
   android:layout_height="wrap_content"
   />
  
<TextView 
   android:layout_width="fill_parent"
   android:layout_height="wrap_content"
   android:text="My WifiInfo"
   />
<TextView 
   android:id="@+id/WifiInfo"
   android:layout_width="fill_parent"
   android:layout_height="wrap_content"
   />
  
<TextView 
   android:layout_width="fill_parent"
   android:layout_height="wrap_content"
   android:text="My Wifi IP:"
   />
<TextView 
   android:id="@+id/Ip"
   android:layout_width="fill_parent"
   android:layout_height="wrap_content"
   />
</LinearLayout>

AndroidWifiIp.java

package com.exercise.AndroidWifiIp;

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

public class AndroidWifiIp extends Activity {
   /** Called when the activity is first created. */
   @Override
   public void onCreate(Bundle savedInstanceState) {
       super.onCreate(savedInstanceState);
       setContentView(R.layout.main);
       TextView textWifiManager = (TextView)findViewById(R.id.WifiManager);
       TextView textWifiInfo = (TextView)findViewById(R.id.WifiInfo);
       TextView textIp = (TextView)findViewById(R.id.Ip);
      
       WifiManager myWifiManager = (WifiManager)getSystemService(Context.WIFI_SERVICE);
      
       WifiInfo myWifiInfo = myWifiManager.getConnectionInfo();
       int myIp = myWifiInfo.getIpAddress();
      
       textWifiManager.setText(myWifiManager.toString());
       textWifiInfo.setText(myWifiInfo.toString());
      
       int intMyIp3 = myIp/0x1000000;
       int intMyIp3mod = myIp%0x1000000;
      
       int intMyIp2 = intMyIp3mod/0x10000;
       int intMyIp2mod = intMyIp3mod%0x10000;
      
       int intMyIp1 = intMyIp2mod/0x100;
       int intMyIp0 = intMyIp2mod%0x100;
      
       textIp.setText(String.valueOf(intMyIp0)
         + "." + String.valueOf(intMyIp1)
         + "." + String.valueOf(intMyIp2)
         + "." + String.valueOf(intMyIp3)
         );
   }
}

Also have to modify AndroidManifest.xml to grant permission of android.permission.ACCESS_WIFI_STATE.

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

Download the files.

Related article: Monitor Wifi status and information with BroadcastReceiver