Calling barcode scanner on a button click in android application

I have downloaded the zxing 1.6 and was able to successfully run a standalone barcode scanner through it. Now this scanner is in another project and (the CaptureActivity) and I have my app's different project called MyProj , all I want to do is on click of button in my project call CaptureActivity in another project , how do I import that entire project in my project or what do I do it get this working. Thanking in advance