This will save you lots of hours that i spend on that, but i need to publish my games and there is no way any update will stop me ! When you will have Build APK problem that says : Error:Execution failed for task ':app:transformDexArchiveWithExternalLibsDexMergerForDebug'. > java.lang.RuntimeException: java.lang.RuntimeException: com.android.builder.dexing.DexArchiveMergerException: Unable to merge dex Here is a screenshot what you have to do: And if you will have problem generated signed apk like i had change minSdkVersion to 21