I have been developing an android app to scan the barcode and QR code and send the results to some other application (HTTP). I have read most of the documentation over internet
I found "zxing" complicated to use. Then I tried with "ZBar Android Version Library". It was so simple. You can download the library from here: http://sourceforge.net/p/zbar/news/2012/03/zbar-android-sdk-version-01-released/
Within the downloaded package, there is a very simple example. Just follow it or include the example to your app. Hopefully your task will be done.