Exclamation [Q] [ URGENT ] Barcode Scanner, only for study

hello sir,

i student university. i'm try develop bar code scanner android apps for my final year project. next week it will be present. my scan button to scan bar code, are work fine. problem is my search button not working at all. i want link that search button, to my SQL that i create. so it will search info about that bar code that i got, and appear result info. Can u guys help please?