database - zxing android creating a list of scanned codes -

so building app keeps track of items on loan students. want able scan barcode on student card, , scan barcode on item borrowing. information should added "loan" database table.

this should able done multiple times, there more 1 student borrowing items @ 1 time. when finished, ui of android app have list of student numbers retrieved student cards alongside item borrowing.

i have embedded zxing app , scanning barcodes. have reached point cannot think how proceed next stage.

i think main problem onactivityresult retrieving read data, , being overwritten every new barcode scan. there way can scan multiple barcodes , save data of each without overwriting?

from scan.java:

    public void onactivityresult(int requestcode, int resultcode, intent intent) {      intentresult scanningresult = intentintegrator.parseactivityresult(requestcode, resultcode, intent);      if (scanningresult != null) {     //we have result         string scancontent = scanningresult.getcontents();         string scanformat = scanningresult.getformatname();          formattxt.settext("format: " + scanformat);         contenttxt.settext("content: " + scancontent);       } else {         toast toast = toast.maketext(getapplicationcontext(), "no scan data received!", toast.length_short);         toast.show();     } } 

the table loans information stored in. dbhelper.java:

     private static final string sql_create_table_onloan = "create table " + table_onloan + "("         + column_onloan_loan_id + " integer primary key autoincrement, "         + column_onloan_kit_number + " text not null, "         + column_onloan_borrower_number + " text not null, "         + column_onloan_date_borrowed + " date not null "         + ");";