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I am building an app-to-app messaging appplication using firebase. When I am trying to run the app, it shows me following the error: enter image description here

what is the problem? How can I solve it?

Rosário Pereira Fernandes
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rabiul
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  • can you share you build.gradle file (the one in the folder app) – Sofiane Daoud Feb 24 '17 at 18:01
  • Don't post screenshots of text please. Instead capture the actual text and add it to your question by clicking the little edit link under it. Also be sure to share the [minimal code (and JSON, and gradle) that are needed to reproduce the problem](http://stackoverflow.com/help/mcve). – Frank van Puffelen Feb 24 '17 at 18:37
  • It worked when i have added packagingOptions { exclude 'META-INF/DEPENDENCIES' exclude 'META-INF/NOTICE' exclude 'META-INF/LICENSE' } in build.gradle – rabiul Feb 24 '17 at 20:16

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