learn from
https://www.cnblogs.com/lianghe01/p/6617275.html
Overall mechanism
The memory in the eyes of Android developers is virtual, paging, and continuous space
In fact, every page must be mapped from ram
So Android's memory is scattered in actual ram
divided into
native process
The java process is based on the native process
important point
The new object is not mapped immediately, but only after the memory is used by memset.