Question: how to use zxing barcode scanner in android?
Answer: Unzip zxing-master.zip, Use eclipse to import "android" project in zxing-master. Create "libs" folder in "android" project and paste cor-3.2.1.jar into the libs folder. Click on project: choose "properties" -> "Java Compiler" to change level to 1.7. ...  If "CameraConfigurationUtils. ...  Clean and build project.