android-recyclerview

问题 I try to implement a search bar like in google maps android app: When the recycler view is in its initial state, the toolbar has no elevation. Only when the users starts scrolling the elevation becomes visible. And the search bar (toolbar) never collapses. Here is what I tried to replicate this: <android.support.design.widget.CoordinatorLayout android:layout_width="match_parent" android:layout_height="match_parent" android:fitsSystemWindows="true"> <android.support.v7.widget.RecyclerView

问题 I did recyclerView retrieve data from firebase real-time database, and created button for delete item from recycelerView and from database I have 2 questions 1- after i add new item in recyclerView and then try delete it not delete directly , just when add item and run code again then i can delete it public class WorkerRecyclerViewAdapter extends RecyclerView.Adapter<WorkerRecyclerViewAdapter.ViewHolder> { private Context context; private ArrayList<Worker> workersList; private

问题 I used firebase database to load information into the recyclerview. By using itemtouchhelper, I was able to relocate the items in the recyclerview. However, the changes made to the recyclerview doesn't save and always goes back to its original state when I end the activity. How can I fix my code to make the changes last permanently? ItemTouchHelper.SimpleCallback simpleCallback = new ItemTouchHelper.SimpleCallback(ItemTouchHelper.UP | ItemTouchHelper.DOWN | ItemTouchHelper.START |

问题 I want to save data from the API in the RecyclerView so that when rotating the screen is not reloaded I think I can use onSaveInstanceState but still don't really understand how to use it @Override public void onViewCreated(@NonNull View view, @Nullable Bundle savedInstanceState) { super.onViewCreated(view, savedInstanceState); final RecyclerView rvTVShow = view.findViewById(R.id.rv_shows); rvTVShow.setHasFixedSize(true); rvTVShow.setLayoutManager(new LinearLayoutManager(getActivity()));

问题 I have an issue with my RecyclerView and ListAdapter. Through an API, I receive items in a ascending order from older to newer. My list is then being refreshed by calling the submitList(items) method. However, since everything is asynchronous, after receiving the first item, the RecyclerView remains on the position of the first item received and showed. Since in the ListAdapter class there is no callback when the submitList() method completed, I cannot find a way to scroll after the updates

问题 Problem: I am trying to remake TikTok's comments UI using a BottomSheetDialogFragment and a RecyclerView . This is how it looks like (ORIGINAL): This is what I have tried for now: Basically, I have a FrameLayour whose first child contains eveerything other than the EditText and the second child is, of course, the EditText. <FrameLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:id="@+id/relativeLayout" android:layout_width

问题 Problem: I am trying to remake TikTok's comments UI using a BottomSheetDialogFragment and a RecyclerView . This is how it looks like (ORIGINAL): This is what I have tried for now: Basically, I have a FrameLayour whose first child contains eveerything other than the EditText and the second child is, of course, the EditText. <FrameLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:id="@+id/relativeLayout" android:layout_width

问题 My List is being sorted by the alphabetical order after sorting by date while I am adding extra 4-5 items in my List with different names. I want to sort my List by date and time only. here I have shared my code please help me to do so. thanks in advance. // Filters All patient to keep only single latest record of each patient id private List<PatientData> filterPatients(List<PatientData> allPatientData) throws ParseException { HashMap<String ,Pair<PatientData,Date>> filtered = new HashMap<>()

问题 My List is being sorted by the alphabetical order after sorting by date while I am adding extra 4-5 items in my List with different names. I want to sort my List by date and time only. here I have shared my code please help me to do so. thanks in advance. // Filters All patient to keep only single latest record of each patient id private List<PatientData> filterPatients(List<PatientData> allPatientData) throws ParseException { HashMap<String ,Pair<PatientData,Date>> filtered = new HashMap<>()

问题 I have two cases. Both with bug. Root element is ConstraintLayout . Fragment element with NavHostFragment ( RecycleView inside). BottomNavigationView connect to bottom . Bug: doesn't work animation of scrolling by CollapsingToolbarLayout . Root element is CoordinatorLayout . The animation by CollapsingToolbarLayout is work. Bug: BottomNavigationView covers last item of RecycleView . Two gifs. Attention the AppBar and date 5 August 2019 (in the bottom). Please help to fix the layout so that