Cannot access zxing jar in android studio -

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i've added zxing core prebuilt jar android studio project. however, unable access of classes. if com.google.zxing doesn't recognize import nor other package. error receive cannot resolve symbol zxing. did add dependency project, i'm not sure going on. zxing core added module.

the first time tried this, imported core files javadoc. i'm not sure if problem. tried again importing core jar, except time without javadocs. able access classes now.


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