Update README.md

Author: HendrixString

README.md

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 # Android-PdfMyXml
 convert your android `XML` layouts into PDF document, works on all versions of Android.
 
+[![Android Arsenal](https://img.shields.io/badge/Android%20Arsenal-Android--PdfMyXml-green.svg?style=flat)](https://android-arsenal.com/details/1/2297)
+
 ### Dependencies
 * [`pdfjet`](https://github.com/soster/pdfjet)