Error IndexOutBoundsException when multiple delete item

[fjr619]

Firstly, thank you for your handwork, but I got issue when try to multiple delete from the bottom of item it always got IndexOutBoundsException, but if i just remove it individually it was good, and if i multiple delete from top item sometimes good sometimes got error.

java.lang.IndexOutOfBoundsException: invalid position 37. State item count is 36 at android.support.v7.widget.RecyclerView$Recycler.convertPreLayoutPositionToPostLayout(RecyclerView.java:3234) at android.support.v7.widget.RecyclerViewHelper.convertPreLayoutPositionToPostLayout(RecyclerViewHelper.java:6) at library.StickyHeadersItemDecoration.isHeader(StickyHeadersItemDecoration.java:110) at library.StickyHeadersItemDecoration.onDrawOver(StickyHeadersItemDecoration.java:58)

*note i use https://github.com/writtmeyer/recyclerviewdemo for multiple delete item

[leruaa]

Hello,

Thanks for raising this issue. Do you have theses exceptions with the samples or with your own app ? How do you do multiple delete ?

[fjr619]

actually with the samples that you given, but i just change the data and add some function to do multiple delete.

[leruaa]

Ok. Can you post the code that do multiple delete (you can fork the recyclerview-stickyheaders repo) ?

[fjr619]

in PersonAdapter

private SparseBooleanArray selectedItems = new SparseBooleanArray();

    @Override
    public void onBindViewHolder(final ViewHolder viewHolder, int position) {
                 ...
                viewHolder.itemView.setActivated(selectedItems.get(position,false));
        }

    public void toggleSelection(int pos) {
        if (selectedItems.get(pos, false)) {
            selectedItems.delete(pos);
        } else {
            selectedItems.put(pos, true);
        }
        notifyItemChanged(pos);
    }

    public void clearSelections() {
        selectedItems.clear();
        notifyDataSetChanged();
    }

    public int getSelectedItemCount() {
        return selectedItems.size();
    }

    public List<Integer> getSelectedItems() {
        List<Integer> items = new ArrayList<Integer>(selectedItems.size());
        for (int i = 0; i < selectedItems.size(); i++) {
            items.add(selectedItems.keyAt(i));
        }
        return items;
    }

on MainActivity i add

public class MainActivity extends Activity implements OnRemoveListener, ActionMode.Callback {

and

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.main, menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        int id = item.getItemId();
        if (id == R.id.add_item) {
            countAdd++;
            Person p = new Person();
            p.setName("new name " + countAdd);
            p.setAge(30);
            personAdapter.addChild(p);

            int posAfterInsert = personDataProvider.getItems().indexOf(p);
            list.scrollToPosition(posAfterInsert);

            return true;
        }
        return super.onOptionsItemSelected(item);
    }

    @Override
    public void onRemove(int position) {
        if (actionMode != null) {
            myToggleSelection(position);
            return;
        }

        personAdapter.removeChild(position);

    }

    @Override
    public void onLongPressRemove(int position) {
        actionMode = startActionMode(this);
        myToggleSelection(position);
    }

    private void myToggleSelection(int position) {
        personAdapter.toggleSelection(position);
        String title = getString(R.string.selected_count, personAdapter.getSelectedItemCount());
        actionMode.setTitle(title);
    }

    @Override

    public boolean onCreateActionMode(ActionMode actionMode, Menu menu) {
        MenuInflater inflater = actionMode.getMenuInflater();
        inflater.inflate(R.menu.delete_menu, menu);
        return true;
    }

    @Override
    public boolean onPrepareActionMode(ActionMode mode, Menu menu) {
        // TODO Auto-generated method stub
        return false;
    }

    @Override
    public boolean onActionItemClicked(ActionMode actionMode, MenuItem menuItem) {
        switch (menuItem.getItemId()) {
        case R.id.menu_delete:
            List<Integer> selectedItemPositions = personAdapter.getSelectedItems();
            int currPos;

            for (int i = selectedItemPositions.size() - 1; i >= 0; i--) {
                currPos = selectedItemPositions.get(i);
                Log.i("TAG", "currPos delete =" + currPos);
                personAdapter.removeChild(currPos);
            }
            actionMode.finish();
            return true;
        default:
            return false;
        }
    }

    @Override
    public void onDestroyActionMode(ActionMode mode) {
        this.actionMode = null;
        personAdapter.clearSelections();
    }

[fjr619]

i will give you my code, because i’m still new in github so i didn’t how to do that

On Oct 29, 2014, at 4:50 PM, Aurélien notifications@github.com wrote:

Ok. Can you post the code that do multiple delete (you can fork the recyclerview-stickyheaders repo) ?

— Reply to this email directly or view it on GitHub.

[leruaa]

Ok, I will see that tonight.

[fjr619]

you can see my project https://github.com/fjr619/RecyclerViewSticky, basically it almost same with yours, i just modify the data and the way action view on click in main activity.

thank you

[fjr619]

i try use the new one 0.4.1 , that bug is still appear.

[leruaa]

When you remove more than one contigous item, you must call notifyItemRangeRemoved() once instead of calling notifyItemRemoved() for each items.

Please let me know if it still doesn't work.

[fjr619]

i still can't do that

List<Integer> selectedItemPositions = personAdapter.getSelectedItems();
int currPos;

            for (int i = selectedItemPositions.size() - 1; i >= 0; i--) {
                currPos = selectedItemPositions.get(i);
                Log.i("TAG", "currPos delete =" + currPos);
                personDataProvider.remove(currPos);
                                personAdapter.notifyItemRemoved(currPos); --> i still got error when delete multiple item 
            }

if i want use personAdapter.notifyItemRangeRemoved, i still didn't know where i have to put that, because example i have 10 datas and i want delete index 9,5,2,1, how i have to put positionStart and itemCount

[leruaa]

If you change your code by :

personDataProvider.remove(1);
personDataProvider.remove(2);
personAdapter.notifyItemRangeRemoved(1, 2);
personDataProvider.remove(5);
personAdapter.notifyItemRemoved(5);
personDataProvider.remove(9);
personAdapter.notifyItemRemoved(9);

Is it working ?

[fjr619]

            List<Integer> selectedItemPositions = personAdapter.getSelectedItems();
            int currPos;

//          selectedItemPositions = a(selectedItemPositions);

            for (int i = selectedItemPositions.size() - 1; i >= 0; i--) {
                currPos = selectedItemPositions.get(i);
                Log.i("TAG", "currPos delete =" + currPos);
                personDataProvider.remove(currPos);
//              personAdapter.notifyItemRemoved(currPos);
//              personAdapter.notifyItemRangeRemoved(currPos, selectedItemPositions.size());
            }

            personAdapter.notifyDataSetChanged();

personAdapter.notifyDataSetChanged(); it is help me, but still i got random bug IndexOutOfBoundsException. you can try my apt from this https://github.com/fjr619/RecyclerViewSticky/tree/master/bin

[leruaa]

I commited a new version of StickyHeadersItemDecoration.java.

Is it working ?

[fjr619]

-still same got random IndexOutOfBoundsException when using notifyItemRemoved -error when using notifyDataSetChanged (when try to multiple delete from bottom)

[fjr619]

with your last commit, it was still happened.

[leruaa]

I installed the apk from yout repository on my device, and I wasn't able to raise a IndexOutOfBoundsException. How can I do it ?

[fjr619]

sorry for late answer, yes because i used other libs for sticky header recycler view. i will make APK with using your libs, so you can test it

[fjr619]

you can try it again from https://github.com/fjr619/RecyclerViewSticky, i already update my APK

[leruaa]

The were a lot of refactoring and bug fixes in the latest versions.Do you still have errors ?