這裏演示通過編程方式動態修改手機靜態IP的方法，可以用於wifi接入點切換
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();
}
}