Sunday, January 16, 2011

Get Wifi IP of Android device, using WifiManager

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

Get Wifi IP of Android device, 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



9 comments:

edward said...

i have a print button onclicking the button i want the printer to print my xml file????
I have no idea how to achieve this....
And need little light and help, thnk u

Android Er said...

hello edward,

Sorry! I have no idea how to print in Android.

James Anderson said...

Is it possible to get the RSSI of individual networks in the ScanResult list? These are not the pre-configured networks.
Please note that i need the RSSI value and not the signal strength in dBm. Thanks

Android Er said...

Please read Check RSSI by monitoring of WifiManager.RSSI_CHANGED_ACTION

James Anderson said...

Thanks for ur reply.

But i'd wanted the following:

1. scan the available networks- which is generally done via startScan(); The results are obtained on a list.

2. get the "RSSI" value for each found-
which is my question.

A little hint/idea would do great. Thanks.

Dhananjay said...

how to establish the wifi connection for running this app on android...

Anonymous said...

Thanks buddy nice work

Fai Zal said...

hello sir, thanks for the tutorial..
can i ask something... what is the different on this three line?

int intMyIp3 = myIp/0x1000000;
int intMyIp3mod = myIp%0x1000000;

int intMyIp2 =intMyIp3mod/0x10000;
int intMyIp2mod = intMyIp3mod%0x10000;

int intMyIp1 = intMyIp2mod/0x100;
int intMyIp0 = intMyIp2mod%0x100;

Andr.oid Eric said...

Hello Fai Zal,

It's used to get the four group of digits, ex. 192.168.1.100