通过编程方式动态修改手机的静态IP，可以用于wifi接入点切换
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(); } }