uses-sdk:minSdkVersion 9 cannot be smaller than version 14

Question

Error:Execution failed for task ':baseGameUtils:processDebugAndroidTestManifest'.

Manifest merger failed : uses-sdk:minSdkVersion 9 cannot be smaller than version 14 declared in library [com.google.android.gms:play-services-ads:11.0.4] C:\\Users\\nekos.android\\build-cache\\ac3e2c727e192cdc9e7fe0403f8315232b0e8024\\output\\AndroidManifest.xml Suggestion: use tools:overrideLibrary="com.google.android.gms.ads.impl" to force usage

Answer 1

Google Play Services don't support Android APi 2.3x (Gingerbread) starting from Google Play Services 10.2, Here's the documentation :

Google Play services 10.2.x is the first release that no longer includes full support for Android version 2.3.x (Gingerbread). Apps developed using SDK release 10.2.x and later require a minimum Android API level of 14 and cannot be installed on devices running an API level below 14.

If you happen to use support library, please be noted that version 26 also need minimum api level 14.