added in API level 23

android.app.assist

Classes

AssistContent Holds information about the content an application is viewing, to hand to an assistant at the user's request. 
AssistStructure

This API automatically creates assist data from the platform's implementation of assist and autofill. 

AssistStructure.ViewNode Describes a single view in the assist data. 
AssistStructure.WindowNode Describes a window in the assist data.