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Integrate zxing barcode scanner into your Android app natively using Eclipse « Damian Flannery's Blog
June 13, 2011
This is step by step tutorial what you need to do, when you want have QR scanner inside your application, and you don’t want to have full screen camera output on the screen: 1) First go to the ZXing project from here http://code.google.com/p/zxing/downloads/list , and download projects file ZXing-2.0.zip.
ZXing QR Reader Direct Integration | AndroidAZ
ScanningViaIntent - zxing - Simple scanning on Android, by calling Barcode Scanner via Intent - Multi-format 1D/2D barcode image processing library with clients for Android, Java
IntentIntegrator The best way to integrate is to use the small library of code we have provided. It correctly handles for you many details, such as setting category, flags, picking the most appropriate app, and most importantly handling the case where Barcode Scanner is not installed:
android - Updating sdk got NoClassDefFoundError for zxing
For some reason, ADT is no longer including libraries from your build path in the generated .apk file.
To fix, create a "libs" folder in the root of your project (ie: bin, src, assets, libs) and put the core.jar file in there. Remove all other instances from your build path, and everything should work fine. by Jun 6