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Add the dependency of a code scanner in the build.gradle
Add meta-data in the manifest file so that Google Play services automatically download the scanner module to the device while your app is installed from the Play Store. In case you do not add it to the meta-data then it will download the scanner module the first time it is used.

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Finally, create the scanner object by specifying the context and option (or just context) to GmsBarcodeScanning and thereafter use this object to scan code like following

This article was previously published on proandroiddev.com

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The purpose of this article is to explain how we can integrate code-scanning functionality…
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