Knowledge Summary of main components of Android applications

In the Android system, several main components are used for flexible organization to facilitate developers, without losing its dazzling effect. It is worth further understanding and learning, the figure below is a summary of the knowledge about Android components in the recent period. It is inevitable that there will be omissions or errors. Please kindly advise.

I think a deep understanding and understanding of the usage and relationship between these components is equivalent to grasping the Android Application.ProgramAs shown in the figure above, the Main Meridian helps us better clarify our thinking. It is because I spent a few hours of rest and sorted out some omissions and errors, it is also regarded as a reference,