QRcode using xzing

Hi, All I need is to write a code using zxing library to integrate barcode scanner into my app. basically, a button when is hit open the camera to scan the QRcode without having to download barcode scanner. I wrote a code that shows how to scan QR code but i had to use intent to call barcode scanner which is kind of lame because I don't want a user to have to go through long process. Note: you have to use zxing. I could send you the code i wrote if you like.