Here is my code

public class NewAddressActivity extends BaseActivity {

    private RobotoEditText houseNumber, fullName, phoneNumber, alternateNumber;

    private RobotoEditText  region;

    private RobotoEditText landMark, town, pinCode;

    private Address address;

    public Customer customer;

    public Order order;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.new_address);

        ActionBarUtils.setActionBar(this, true);

        getActiveActionBar().setHomeAsUpIndicator(R.drawable.ic_close_white_24dp);

        this.setTitle("Add New Address");

        fullName = (RobotoEditText) findViewById(R.id.name);

        town = (RobotoEditText) findViewById(R.id.town);

        phoneNumber = (RobotoEditText) findViewById(R.id.mobile_number);

        alternateNumber = (RobotoEditText) findViewById(R.id.alternate_number);//alternate number

        houseNumber = (RobotoEditText) findViewById(R.id.house_name);

        landMark = (RobotoEditText) findViewById(R.id.land_mark);

        region = (RobotoEditText) findViewById(R.id.street_name);

        pinCode = (RobotoEditText) findViewById(R.id.pin_number);

        Button submit = (Button) findViewById(R.id.submit_address);
        submit.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                sendAddress();
            }
        });

        updateView();

    }

    private void updateView() {

        //Address address = Order.getInstance().getAddress();

        if(address != null) {

            fullName.setText(address.getFullName());
            phoneNumber.setText(address.getMobileNumber());
            pinCode.setText(address.getPincode());
            houseNumber.setText(address.getHouseNumber());
            landMark.setText(address.getLandMark());
            region.setText(address.getRegion());
            town.setText(address.getAddress());
        } else{

            if(Order.getInstance().getCustomer() != null) {
                fullName.setText(Order.getInstance().getCustomer().getFullName());


            }
        }
    }

    private void sendAddress(){

        AddNewAddressApi request = new AddNewAddressApi(listener);

        JSONArray jsonArray = new JSONArray();
        JSONObject jsonObject = new JSONObject();
        try {
            jsonObject.put("AddressID",0);


               // jsonObject.put("CustomerID",Order.getInstance().getCustomer().getId());


                jsonObject.put("CustomerID",Order.getInstance().getCustomer().getId());


            jsonObject.put("FullName",fullName.getText().toString());
            jsonObject.put("Address",town.getText().toString());
            jsonObject.put("ContactNumber",phoneNumber.getText().toString());
            jsonObject.put("Pincode",pinCode.getText().toString());
            jsonObject.put("HouseNumber",houseNumber.getText().toString());
            jsonObject.put("LandMark",landMark.getText().toString());
            jsonObject.put("AddressType","Home");
            jsonObject.put("Region",region.getText().toString());


            Address address = new Address(jsonObject);
          //Order.getInstance().setAddress(address);
        } catch (JSONException e) {
            e.printStackTrace();
        }

        jsonArray.put(jsonObject);
        //request.addParam("");
        request.addParam("address",jsonArray);

        request.fire();

        showProgressWheel();
    }


    RPCRequest.OnResponseListener listener = new RPCRequest.OnResponseListener<AddNewAddressApi>() {
        @Override
        public void onSuccessResponse(RPCRequest request, AddNewAddressApi response) {

            hideProgressWheel(true);

            Address address = new Address();
            address.setId(response.AddressID);


            address.setMobileNumber(phoneNumber.getText().toString());
            try {
                address.setAlternateNumber(alternateNumber.getText().toString());
            }catch (NullPointerException e){

            }
            address.setAddress(town.getText().toString());
            address.setPincode(pinCode.getText().toString());
            address.setFullName(fullName.getText().toString());
            address.setHouseNumber(houseNumber.getText().toString());
            address.setStreet(region.getText().toString());
            address.setLandMark(landMark.getText().toString());
            //Order.getInstance().setAddress(address);

          if(Order.getInstance().getOrderId() == null) {

              Intent intent = new Intent(NewAddressActivity.this, HomeScreenActivity.class);

               startActivity(intent);
           }else {
                finish();
            }

        }

        @Override
        public void onErrorResponse(RPCRequest request, ResponseError error) {

            hideProgressWheel(true);

            showErrorMessage(error.getErrorTitle(), error.getErrorSummary());

        }
    };

    private void showErrorMessage(String title, String message) {
        AlertDialog.Builder builder = new AlertDialog.Builder(NewAddressActivity.this);

        builder.setMessage(message)
                .setTitle(title);

        builder.setPositiveButton(R.string.ok, new DialogInterface.OnClickListener() {
            @Override
            public void onClick(DialogInterface dialog, int i) {
                dialog.dismiss();
            }
        });

        AlertDialog dialog = builder.create();
        dialog.show();
    }


}