Set Android IP,DNS,GATEWAY setting programmatically
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?