为usb网卡设置ip地址之三

    private boolean setRoute(String route) {        try{            IBinder b = ServiceManager.getService(Context.NETWORKMANAGEMENT_SERVICE);            INetworkManagementService service = INetworkManagementService.Stub.asInterface(b);            boolean ret = service.replaceV4DefaultRoute(ETH0,route) ;            return ret;        } catch (android.os.RemoteException e) {            Log.w(TAG,"repalceV4DefaultRoute=" + e);            return false;        }    }    private  int computeprefixLength(InetAddress mask) {        int count = 0;        for (byte b : mask.getAddress()) {            for (int i = 0; i < 8; ++i) {                if ((b & (1 << i)) != 0) {                    ++count;                }            }        }        return count;    }        private boolean isValideFromat(String address) {        if (address == null) {            return false;        }        String ipreg ="^(([1-9]{1}[0-9]{1}|[0-9]{1}|1\\d\\d|2[0-4]\\d|25[0-5])(\\.)){3}([1-9]{1}[0-9]{1}|[0-9]{1}|1\\d\\d|2[0-4]\\d|25[0-5])$";         Pattern p = Pattern.compile(ipreg);        Matcher m = p.matcher(address);        if (m.find()) {            return true;        } else {            return false;        }    }    private final BroadcastReceiver mUsbReceiver = new BroadcastReceiver() {        public void onReceive(Context context, Intent intent) {            String action = intent.getAction();            if ("android.hardware.usb.action.USB_DEVICE_DETACHED".equals(action)) {                UsbDevice device = (UsbDevice)intent.getParcelableExtra(UsbManager.EXTRA_DEVICE);                Log.i(TAG,"USB_DEVICE_DETACHED device="+device);                                ipEditText.setEnabled(false);                netmastEditText.setEnabled(false);                gwEditText.setEnabled(false);                dnsEditText.setEnabled(false);                okBtn.setEnabled(false);                                //usbMacAddrmodePreference.setChecked(false);             }          }    };