android if Statement

i have a problem with android if, this is my Code:

private String getCode = null,getIn = null,getOut = null,getBold = null;

 if (getIntent().getExtras().getString("pos_code") != null){
        getCode = getIntent().getExtras().getString("pos_code");
    }
    if (getIntent().getExtras().getString("pos_in") != null){
        getIn = getIntent().getExtras().getString("pos_in");
    }
    if (getIntent().getExtras().getString("pos_out") != null){
        getOut = getIntent().getExtras().getString("pos_out");
    }
    if (getIntent().getExtras().getString("pos_bold") != null){
        getBold = getIntent().getExtras().getString("pos_bold");
    }

if (response.body().get(i).getAcf().getPosCode().toString().contains(getCode.toString())
                            && response.body().get(i).getAcf().getPosDInside().toString().matches(getIn.toString())
                            && response.body().get(i).getAcf().getPosDOutsid().toString().matches(getOut.toString())
                            && response.body().get(i).getAcf().getPosBBold().toString().matches(getBold.toString())) {

                        list.add(new Model(Model.IMAGE_TYPE
                                , response.body().get(i).getAcf().getPosCode()
                                , response.body().get(i).getAcf().getPosDInside()
                                , response.body().get(i).getAcf().getPosDOutsid()
                                , response.body().get(i).getAcf().getPosBBold()));
                    }

and its working But i want if one or more of 4 Strings was null the IF steel Working and give the results without considering the nulled string and match others

actually i want to say that: i want to get all of data that matched or contains the EditText from user and if there was naull just NOT compare the nulled one