Recyclerview implements grouping effects in a variety of ways

1、 By customizing ItemDecoration To achieve grouping （ commend ）;

utilize RecyclerView.ItemDecoration Achieve top suspension effect

RecyclerView Easy implementation of the suspended head part of the group list

RecyclerView Realize the floating top column of the grouping list （ Ceiling effect ）

2、 By customizing Adapter To achieve grouping ;

https://github.com/truizlop/SectionedRecyclerView （ Not updated ）

RecyclerView Realize the effect of grouping mobile photo albums by time

GroupRecyclerAdapter It is used to realize grouping data in RecyclerView Show in , Include the split line treatment in the list .

My own way of thinking ：
adopt At present position Corresponding Title and the previous position Compare the corresponding title , If the title is different , The header information is displayed ; If it is the same, the header information is hidden ;

3、 Distinguish by data structure Group and Child

problem ： If the data structures do not match , Need to reassemble data , Affect performance ; If the list is paged , It's more complicated to deal with ;

4、RecyclerView nesting RecyclerView （ Not recommended ）