public void onCreate(Bundle savedInstanceState) {  super.onCreate(savedInstanceState);  setContentView(R.layout.main);  ContentResolver cr = this.getContentResolver();  try {   if (Settings.System.getInt(cr, Settings.System.WIFI_USE_STATIC_IP)==0){    Log.d("Demo", "No use Static IP!");   }   else{    Log.d("Demo", "use Static IP and Change IP to 192.168.1.123!");    Settings.System.putString(cr, Settings.System.WIFI_STATIC_IP, "192.168.1.125");    Settings.System.putString(cr, Settings.System.WIFI_STATIC_GATEWAY, "192.168.1.1");    Settings.System.putString(cr, Settings.System.WIFI_STATIC_NETMASK, "255.255.255.0");    Settings.System.putString(cr, Settings.System.WIFI_STATIC_DNS1, "202.103.24.68");    Settings.System.putString(cr, Settings.System.WIFI_STATIC_DNS2, "202.103.0.68");   }  } catch (SettingNotFoundException e) {   // TODO Auto-generated catch block   e.printStackTrace();  }}