以下是我根据@divers的帖子所做的事情:
正如他所提到的,我向适配器传递了一个已排序的团队列表,并在下一个名称之前添加了字母。
这是用于设置适配器的代码。
void updateUI(ArrayList<TeamMember> teamMembers) {
adapter = new TeamMemberActivityAdapter(this, addAlphabets(sortList(teamMembers)));
recList.setAdapter(adapter);
recList.setVisibility(View.VISIBLE);
spinningProgressView.setVisibility(View.GONE);
}
以下是从服务器获取团队列表并对其进行排序的代码:
ArrayList<TeamMember> sortList(ArrayList<TeamMember> list) {
Collections.sort(list, new Comparator<TeamMember>() {
@Override
public int compare(TeamMember teamMember1, TeamMember teamMember2) {
return teamMember1.getFullname().compareTo(teamMember2.getFullname());
}
});
return list;
}
在向列表中添加字母时,我会设置一个类型值来确定其是否是字母或团队名称,并在适配器中检查以显示相应的布局。代码如下所示:
在向列表添加字母的同时,我会设定一个类型值,以便在适配器内部进行检查,以决定它是字母还是团队名称,并显示相应的布局。以下为代码:
ArrayList<TeamMember> addAlphabets(ArrayList<TeamMember> list) {
int i = 0;
ArrayList<TeamMember> customList = new ArrayList<TeamMember>(); TeamMember firstMember = new TeamMember();
firstMember.setFullname(String.valueOf(list.get(0).getFullname().charAt(0)));
firstMember.setType(1);
customList.add(firstMember);
for (i = 0; i < list.size() - 1; i++) {
TeamMember teamMember = new TeamMember();
char name1 = list.get(i).getFullname().charAt(0);
char name2 = list.get(i + 1).getFullname().charAt(0);
if (name1 == name2) {
list.get(i).setType(2);
customList.add(list.get(i));
} else {
list.get(i).setType(2);
customList.add(list.get(i));
teamMember.setFullname(String.valueOf(name2));
teamMember.setType(1);
customList.add(teamMember);
}
}
list.get(i).setType(2);
customList.add(list.get(i));
return customList;
}
最后,在您的适配器中检查项目是否为团队成员名称或字母表,并根据下面所示显示相应的布局:
@Override
public int getItemViewType(int position) {
int viewType = 0;
if (mMembers.get(position).getType() == TYPE_LETTER) {
viewType = TYPE_LETTER;
} else if (mMembers.get(position).getType() == TYPE_MEMBER) {
viewType = TYPE_MEMBER;
}
return viewType;
}
@Override
public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup viewGroup, int viewType) {
LayoutInflater mInflater = LayoutInflater.from(viewGroup.getContext());
switch (viewType) {
case TYPE_LETTER:
ViewGroup vGroupImage = (ViewGroup) mInflater.inflate(R.layout.board_team_letter_item, viewGroup, false);
ViewHolderLetter image = new ViewHolderLetter(vGroupImage);
return image;
case TYPE_MEMBER:
ViewGroup vGroupText = (ViewGroup) mInflater.inflate(R.layout.board_team_member_item, viewGroup, false);
ViewHolderMember text = new ViewHolderMember(vGroupText);
return text;
default:
ViewGroup vGroupText2 = (ViewGroup) mInflater.inflate(R.layout.board_team_member_item, viewGroup, false);
ViewHolderMember text1 = new ViewHolderMember(vGroupText2);
return text1;
}
}
希望这能对你有所帮助。祝一切顺利。
Adapter
中放置特殊视图。比较您的模型并从标题中获取第一个字符....
private void getHeaderListLatter(ArrayList<CountriesModel> usersList) {
Collections.sort(usersList, new Comparator<CountriesModel>() {
@Override
public int compare(CountriesModel user1, CountriesModel user2) {
return String.valueOf(user1.name.charAt(0)).toUpperCase().compareTo(String.valueOf(user2.name.charAt(0)).toUpperCase());
}
});
String lastHeader = "";
int size = usersList.size();
for (int i = 0; i < size; i++) {
CountriesModel user = usersList.get(i);
String header = String.valueOf(user.name.charAt(0)).toUpperCase();
if (!TextUtils.equals(lastHeader, header)) {
lastHeader = header;
mSectionList.add(new CountriesModel(header,true));
}
mSectionList.add(user);
}
}
@Override
public int getItemViewType(int position) {
if (mCountriesModelList.get(position).isSection) {
return SECTION_VIEW;
} else {
return CONTENT_VIEW;
}
}
完整的参考资料,请查看 https://github.com/sayanmanna/LetterSectionedRecyclerView
https://github.com/emilsjolander/StickyListHeaders 我希望这正是您所需要的。