Creating a stanadlone QR Code scanner

I want to know how to begin with creating a basic QR Code scanner. I dont want any application Intent to be called. I want to know how my Camera intent can be started in QRCode scan mode, and how the result can be used. My application is only for S开发者_运维百科tring. Thanks in advance.

Take a look at googles zxing here, its open source so you can have a look at how they achieve it. Hope this helps.