I have a recyclerview that allows me to drag items in edit mode. When the user exits edit mode, I need to disable the drag and drop function.
I tried to change things in ItemTouchCallback, including movement flags, and isLongPressDragEnabled to no avail. A long press continued to trigger the drag event.
My current solution is to disconnect and reconnect the fragment, and then just add a callback when I re-enter edit mode, however I hope that there is something a little cleaner that I'm missing.
Callback:
public class ItemTouchCallback extends ItemTouchHelper.Callback { private final ItemTouchHelperAdapter mAdapter; public ItemTouchCallback(ItemTouchHelperAdapter mAdapter) { this.mAdapter = mAdapter; } @Override public int getMovementFlags(RecyclerView recyclerView, RecyclerView.ViewHolder viewHolder) { int dragFlags = ItemTouchHelper.START | ItemTouchHelper.END |ItemTouchHelper.DOWN | ItemTouchHelper.UP; return makeMovementFlags(dragFlags, 0); } @Override public boolean onMove(RecyclerView recyclerView, RecyclerView.ViewHolder viewHolder, RecyclerView.ViewHolder target) { mAdapter.onItemMove(viewHolder.getAdapterPosition(), target.getAdapterPosition()); return true; } @Override public void onSwiped(RecyclerView.ViewHolder viewHolder, int direction) { } @Override public boolean isLongPressDragEnabled() { return true; } @Override public boolean isItemViewSwipeEnabled() { return false; } @Override public void onSelectedChanged(RecyclerView.ViewHolder viewHolder, int actionState) { if (actionState != ItemTouchHelper.ACTION_STATE_IDLE) { if (viewHolder instanceof ItemTouchHelperViewHolder) { ItemTouchHelperViewHolder itemViewHolder = (ItemTouchHelperViewHolder) viewHolder; itemViewHolder.onItemSelected(); } } super.onSelectedChanged(viewHolder, actionState); } @Override public void clearView(RecyclerView recyclerView, RecyclerView.ViewHolder viewHolder) { if (viewHolder instanceof ItemTouchHelperViewHolder) { ItemTouchHelperViewHolder itemViewHolder = (ItemTouchHelperViewHolder) viewHolder; itemViewHolder.onItemClear(); } } }
Adapter:
public interface ItemTouchHelperAdapter { void onItemMove(int fromPosition, int toPosition); void onItemDismiss(int position); }
Fragment:
@Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { View rootView = inflater.inflate(R.layout.fragment_rectangle_switches, container, false); ButterKnife.bind(this, rootView); // Note: Title set by AmbientPagerFragment layoutManager = new LinearLayoutManager(getActivity(), LinearLayoutManager.HORIZONTAL, false); recyclerView.setLayoutManager(layoutManager); adapter = new SwitchAdapter(switchList, dimmableList, ghostList, editMode, bus); recyclerView.setAdapter(adapter); displaySwitches(); return rootView; } @Override public boolean onOptionsItemSelected(MenuItem item) { switch (item.getItemId()) { case R.id.icon_edit: editMode = true; changeEditMode(); break; case R.id.icon_cancel: editMode = false; changeEditMode(); break; } return super.onOptionsItemSelected(item); } public void changeEditMode() { bus.post(new EditModeEvent(editMode)); reattachFragment(); displaySwitches(); getActivity().invalidateOptionsMenu(); } private void displaySwitches() { if (editMode) { callback = new ItemTouchCallback((ItemTouchHelperAdapter) adapter); mTouchHelper = new ItemTouchHelper(callback); mTouchHelper.attachToRecyclerView(recyclerView); } } private void reattachFragment(){ ft = getFragmentManager().beginTransaction(); ft.detach(this).attach(this).commit(); }
Thanks.