staggeredgridlayoutmanager don';在android中刷新后不显示项目
在我的RecyclerView中,我使用StaggeredLayoutManager来显示项目,但当使用RefrefreshLAyout刷新时,但稍后刷新时不显示项目,直到在RecyclerView中滚动,这是代码的一部分staggeredgridlayoutmanager don';在android中刷新后不显示项目,android,android-recyclerview,layout-manager,Android,Android Recyclerview,Layout Manager,在我的RecyclerView中,我使用StaggeredLayoutManager来显示项目,但当使用RefrefreshLAyout刷新时,但稍后刷新时不显示项目,直到在RecyclerView中滚动,这是代码的一部分 public class NotesListFragment extends Fragment implements SwipeRefreshLayout.OnRefreshListener, OnInternetListener, OnTapInternetDialog
public class NotesListFragment extends Fragment
implements SwipeRefreshLayout.OnRefreshListener, OnInternetListener, OnTapInternetDialogListener {
private SwipeRefreshLayout notesListRefreshLayout = null;
private ListRecyclerView notesListRecyclerView = null;
private NotesAdapter notesAdapter = null;
private List<Note> notes = null;
public NotesListFragment() {
// Required empty public constructor
}
public static NotesListFragment newInstance() {
NotesListFragment fragment = new NotesListFragment();
return fragment;
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
return inflater.inflate(R.layout.fragment_notes_list, container, false);
}
@Override
public void onViewCreated(View view, @Nullable Bundle savedInstanceState) {
super.onViewCreated(view, savedInstanceState);
notesListRefreshLayout = (SwipeRefreshLayout) view.findViewById(R.id.notesListRefreshLayout);
notesListRefreshLayout.setOnRefreshListener(this);
notesListRecyclerView = (ListRecyclerView) view.findViewById(R.id.notesListRecyclerView);
initObjects();
showNotes(notes);
}
private void initObjects() {
notesListRecyclerView.setHasFixedSize(true);
if (isTablet) {
if (((BaseActivityCompat) getActivity()).getOrientationDevice() == OrientationDevice.LANDSCAPE) {
final StaggeredGridLayoutManager manager = new StaggeredGridLayoutManager(3, StaggeredGridLayoutManager.VERTICAL);
notesListRecyclerView.setLayoutManager(manager);
notesListRecyclerView.addItemDecoration(new SpaceGridDecoration(3, 20, true));
} else {
final StaggeredGridLayoutManager manager = new StaggeredGridLayoutManager(2, StaggeredGridLayoutManager.VERTICAL);
notesListRecyclerView.setLayoutManager(manager);
notesListRecyclerView.addItemDecoration(new SpaceGridDecoration(2, 20, true));
}
} else {
final StaggeredGridLayoutManager manager = new StaggeredGridLayoutManager(1, StaggeredGridLayoutManager.VERTICAL);
notesListRecyclerView.setLayoutManager(manager);
}
}
private void showNotes(List<Note> notes) {
if (notesAdapter == null) {
notesAdapter = new NotesAdapter(getContext(), notes, advertising,
advertisingList, (AppCompatActivity) getActivity(), AdvertisingSection.HOME.getSection());
notesListRecyclerView.setAdapter(notesAdapter);
notesAdapter.setOnNoteItemClickListener(onNoteItemClickListener);
notesAdapter.setOnNoteActionClickListener(onNoteActionClickListener);
} else {
notesAdapter.setUpdate(true);
notesAdapter.refreshAdapter(notes);
notesListRecyclerView.setAdapter(notesAdapter);
}
}
public void onRefresh() {
obtainNotesHome(true);
}
}
public类NotesListFragment扩展了片段
实现SwipeRefreshLayout.OnRefreshListener、OnInternetListener、OnTapInternetDialogListener{
private SwipeRefreshLayout NotesListerFreshLayout=null;
private ListRecyclerView notesListRecyclerView=null;
私有NotesAdapter NotesAdapter=null;
私有列表注释=null;
公共NotesListFragment(){
//必需的空公共构造函数
}
公共静态NotesListFragment newInstance(){
NotesListFragment=新的NotesListFragment();
返回片段;
}
@凌驾
创建视图上的公共视图(布局、充气机、视图组容器、,
Bundle savedInstanceState){
返回充气机。充气(R.layout.fragment\u notes\u列表,容器,错误);
}
@凌驾
已创建视图上的公共void(视图,@Nullable Bundle savedInstanceState){
super.onViewCreated(视图,savedInstanceState);
notesListRefreshLayout=(SwiperFreshLayout)view.findViewById(R.id.notesListRefreshLayout);
NotesListerFreshLayout.setOnRefreshListener(此);
NotesListRecycleView=(ListRecycleView)view.findViewById(R.id.NotesListRecycleView);
initObjects();
showNotes(notes);
}
私有void initObjects(){
NotesListerCyclerView.setHasFixedSize(true);
如果(isTablet){
if(((BaseActivityCompat)getActivity()).getOrientationDevice()==OrientationDevice.LANDSCAPE){
最终StaggedGridLayoutManager=新的StaggedGridLayoutManager(3,StaggedGridLayoutManager.VERTICAL);
notesListRecyclerView.setLayoutManager(管理器);
addItemDecoration(新的SpaceGridDecoration(3,20,true));
}否则{
最终StaggedGridLayoutManager=新的StaggedGridLayoutManager(2,StaggedGridLayoutManager.VERTICAL);
notesListRecyclerView.setLayoutManager(管理器);
addItemDecoration(新的SpaceGridDecoration(2,20,true));
}
}否则{
最终StaggedGridLayoutManager=新的StaggedGridLayoutManager(1,StaggedGridLayoutManager.VERTICAL);
notesListRecyclerView.setLayoutManager(管理器);
}
}
私人void showNotes(列表注释){
如果(notesAdapter==null){
notesAdapter=新的notesAdapter(getContext(),注释,广告,
advertisingList,(AppCompatActivity)getActivity(),AdvertisingSection.HOME.getSection();
NotesListerCyclerView.setAdapter(notesAdapter);
setOnNoteItemClickListener(onNoteItemClickListener);
setOnNoteActionClickListener(onNoteActionClickListener);
}否则{
notesAdapter.setUpdate(真);
notesAdapter.refreshAdapter(备注);
NotesListerCyclerView.setAdapter(notesAdapter);
}
}
公共void onRefresh(){
获得noteshome(真);
}
}
稍后,使用RefreshLayout的刷新将实现显示空间null,并且当我使用staggeredlayoutmanager在recyclerview中滚动项目时,将显示该项目。我认为您的代码没有问题。尝试使用占位符图像。它对我起了作用。我认为您的代码没有问题。尝试使用占位符图像。这对我很有用。此片段用于tabhostfragment,当更改tab并返回此片段时,recyclerview不显示包含项的列表,当调试内存中存在的适配器但不显示任何内容时,适配器如何丢失此片段用于tabhostfragment,当更改tab并返回此片段时,recyclerview not show(循环视图不显示)列表包含项,调试适配器时适配器如何丢失,但不显示任何内容