Why are the Android runtime and native libraries in the same layer?

Question

Regarding the diagram in Android's website: https://developer.android.com/guide/platform

Why did they put the Android Runtime category in the same layer as the native C/C++ libraries category. Shouldn't they be one on top of the other?

Answer 1

That layer is for components that support Java API Framework interface with the Hardware Abstraction Layer. Components in Java API Framework utilize both Native C/C++ Libraries and Android Runtime.