@Override
protected List<? extends BaseUser> doInBackground(Void... params) {
if (adapter == null || microBlog == null) {
return null;
}
List<? extends BaseUser> userList = null;
boolean isFirstLoad = context.isFirstLoad();
SocialGraphDao dao = new SocialGraphDao(context);
try {
paging = adapter.getPaging();
if (!isFirstLoad && paging.moveToNext()) {
if (relation == Relation.Followingship) {
userList = dao.getFriends(user, paging);
} else {
userList = dao.getFollowers(user, paging);
}
if (paging.getPageIndex() == 1 && ListUtil.isEmpty(userList)) {
isFirstLoad = true;
context.setFirstLoad(isFirstLoad);
}
}
SocialGraphCacheTask cacheTask = null;
if (isFirstLoad) {
// 第一次加载时，做一个缓冲task
if (paging.getPageIndex() == 1 && adapter.getCount() == 0) {
Paging<User> remotePaging = new Paging<User>();
adapter.setPaging(remotePaging);
// 缓冲远程数据;
cacheTask = new SocialGraphCacheTask(context, account, relation);
}
paging = adapter.getPaging();
if (paging.moveToNext()) {
if (relation == Relation.Followingship) {
userList = microBlog.getFriends(paging);
} else {
userList = microBlog.getFollowers(paging);
}
}
} else if (paging.getPageIndex() == 1) {
// 防止新关注，缓冲第一次。
cacheTask = new SocialGraphCacheTask(context, account, relation);
cacheTask.setCycleTime(1);
cacheTask.setPageSize(20);
}
if (cacheTask != null) {
cacheTask.execute();
}
} catch (LibException e) {
if (Constants.DEBUG) Log.e(TAG, "Task", e);
resultMsg = ResourceBook.getStatusCodeValue(e.getExceptionCode(), context);
paging.moveToPrevious();
}
return userList;
}
