[Solved] integrate zxing in own android app [closed]

The instructions in the blog post are incorrect, in at least one area.

The following paragraph from Step #3:

The project will not currently build. We need to add the core.jar file (that we produced in the previous step) into our project. Right-click on ZXing project –> properties –> Java Build Path –> Add External Jars –> Navigate to and select core.jar –> Open –> OK.

should read:

The project will not currently build. We need to add the core.jar file (that we produced in the previous step) into our project. Simply copy it into the ZXing project’s libs/ directory.

Please undo the manual changes you presumably made based on the original paragraph, and copy the core.jar file into the ZXing project’s libs/ directory.