Remove all items from RecyclerView

Question

I am trying to remove all the elements from my RecyclerView in my onRestart method so the items don t get loaded twice    Override protected void onRestart         super onRestart            first clear the recycler view so items are not populated twice     for  int i   0  i  lt  recyclerAdapter getSize    i              recyclerAdapter delete i                 then reload the data     PostCall doPostCall   new PostCall       my AsyncTask         doPostCall execute        But for some reason the delete method I created in the adapter is not functioning properly   in RecyclerAdapter java    public void delete int position       myList remove position       notifyItemRemoved position      public int getSize        return myList size        I think every other item in my list gets deleted instead of the entire list   With a listview it was so easy and I simply called adapter clear     Can someone please help me fix up the code   I think I should be using notifyItemRangeRemoved           but I am not sure how  TIA

User · Answer

Avoid deleting your items in a for loop and calling notifyDataSetChanged in every iteration  Instead just call the clear method in your list myList clear    and then notify your adapter  public void clearData         myList clear       clear list     mAdapter notifyDataSetChanged       let your adapter know about the changes and reload view

User · Answer

This works great for me   public void clear         int size   data size        if  size  gt  0            for  int i   0  i  lt  size  i                  data remove 0                      notifyItemRangeRemoved 0  size             Source  https   github com mikepenz LollipopShowcase blob master app src main java com mikepenz lollipopshowcase adapter ApplicationAdapter java  or   public void clear         int size   data size        data clear        notifyItemRangeRemoved 0  size       For you    Override protected void onRestart         super onRestart            first clear the recycler view so items are not populated twice     recyclerAdapter clear            then reload the data     PostCall doPostCall   new PostCall       my AsyncTask         doPostCall execute

User · Answer

Help yourself       public void clearAdapter         arrayNull clear        notifyDataSetChanged

User · Answer

Another way to clear the recycleview items is to instanciate a new empty adapter   mRecyclerView setAdapter new MyAdapter this  new ArrayList lt MyDataSet gt         It s probably not the most optimized solution but it s working like a charm

User · Answer

ListView uses clear     But  if you re just doing it for RecyclerView  First you have to clear your RecyclerView Adapter with notifyItemRangeRemoved 0 size   Then  only you recyclerView removeAllViewsInLayout

User · Answer

private void clearRecyclerView         CustomListViewValuesArr clear        customRecyclerViewAdapter notifyDataSetChanged        use this func

User · Answer

For my case adding an empty list did the job   List lt Object gt  data   new ArrayList lt  gt     adapter setData data   adapter notifyDataSetChanged

User · Answer

You have better clear the array-list that you used for recyleview adapter   arraylist clear

User · Answer

recyclerView removeAllViewsInLayout      The above line would help you remove all views from the layout   For you    Override protected void onRestart         super onRestart         recyclerView removeAllViewsInLayout      removes all the views        then reload the data     PostCall doPostCall   new PostCall      my AsyncTask         doPostCall execute

User · Answer

setAdapter null     Useful if RecycleView have different views type

User · Answer

This is how I cleared my recyclerview and added new items to it with animation   mList clear    mAdapter notifyDataSetChanged     mSwipeRefreshLayout setRefreshing false      reset adapter with empty array list  it did the trick animation  mAdapter   new MyAdapter context  mList   recyclerView setAdapter mAdapter    mList addAll newList   mAdapter notifyDataSetChanged

User · Answer

On Xamarin Android  It works for me and need change layout   var layout   recyclerView GetLayoutManager   as GridLayoutManager   layout SpanCount   GetItemPerRow Context    recyclerView SetAdapter null    recyclerView SetAdapter adapter     reset

User · Answer

public void clearData         mylist removeAll mylist       mAdapter notifyDataSetChanged        recyclerView setAdapter mAdapter

[android] Remove all items from RecyclerView

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