Set Android IP,DNS,GATEWAY setting programmatically

Question

How do I set wifi ip address, dns address, gateway from android java i.e programmatically, I didn't find any method which has the capability to store the values.

Solution 1

You can change system settings programatically.

First you need to request the 'WRITE_SETTINGS' permission in your 'AndroidManifest.xml':

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

Then you need to actually change the setting using the following code:

    android.provider.Settings.System.putString(getContentResolver(), android.provider.Settings.System.WIFI_USE_STATIC_IP, "0");
    android.provider.Settings.System.putString(getContentResolver(), android.provider.Settings.System.WIFI_STATIC_DNS1, "192.168.0.2");
    android.provider.Settings.System.putString(getContentResolver(), android.provider.Settings.System.WIFI_STATIC_DNS2, "192.168.0.3");
    android.provider.Settings.System.putString(getContentResolver(), android.provider.Settings.System.WIFI_STATIC_GATEWAY, "192.168.0.1");
    android.provider.Settings.System.putString(getContentResolver(), android.provider.Settings.System.WIFI_STATIC_NETMASK, "255.255.255.0");
    android.provider.Settings.System.putString(getContentResolver(), android.provider.Settings.System.WIFI_STATIC_IP, "1");

The current settings can be accessed via the same method but use 'getString' instead of 'putString'.

For information about the settings option visit the reference here: Settings.System | Android Developers

Solution 2

You can't do this from an application.

Would you like applications on your phone to change phone's settings at will?

Comments

[faheem]

yes i want my application to change wifi ip settings.. its not possible?

[Kyle P]

I think the point Peter is trying to make is that you shouldn't want arbitrary applications to change these settings.

[faheem]

ok, i wanna create an application that changes these n/w settings (ip,dns,gateway).. create different profiles of wifi config. and on single touch it changes the configruation..60% of my app has completed,just want a method or anything to change these settings

[Peter Knego]

Yes we understand what you would like to do - it's not possible. Applications can't change phone settings.

[faheem]

i heard everything is possible in linux as well as android :))

[faheem]

Thanks,by using intent is it possible to change wifi settings?

[Peter Knego]

Well there is some truth in this. You could use NDK - this gives you low-level access to Linux under Android. Warning: don't expect this to be documented or supported. They might even ban you from Android Market (I know I would). developer.android.com/sdk/ndk/index.html

[Harpreet]

@Flexiweb, Bro. Its not working for Android OS Ver 3 & above. Can you please help for that too.

[Timothy Miller]

How does this set the DNS value?

[Jeff.H]

This may work for 'putString' but I am trying on 5.1.1 to 'getString' and it is returning null for every one of these.