I am trying to implement ItemTouchHelper for Horizontal Recyclerview. (setting layout manager to LinearLayoutManager with orientation LinearLayoutManager.HORIZONTAL). Example, I want to delete an item when swiped down and drag to left or right for swapping items.
All the samples I have gone through explains ItemTouchHelper for Vertical Recyclerview or items in grid.
Followed samples from following links:
https://medium.com/@ipaulpro/drag-and-swipe-with-recyclerview-b9456d2b1aaf
https://medium.com/@xabaras/recyclerview-swiping-with-style-151e21b1af07
How can I achieve swipe down to delete and drag sideways to swap items in Horizontal Recyclerview?
You can use this simple code to achieve the swipe down to remove.
ItemTouchHelper.SimpleCallback simpleCallback = new ItemTouchHelper.SimpleCallback(0,ItemTouchHelper.DOWN) {
@Override
public boolean onMove(RecyclerView recyclerView, RecyclerView.ViewHolder viewHolder, RecyclerView.ViewHolder target) {
return false;
}
@Override
public void onSwiped(RecyclerView.ViewHolder viewHolder, int direction) {
final int position = viewHolder.getLayoutPosition();
if (direction == ItemTouchHelper.DOWN) {
//your code for deleting the item from database or from the list
adapter.removeNote(position);
adapter.notifyItemRemoved(position)
}
}
};
ItemTouchHelper itemTouchHelper = new ItemTouchHelper(simpleCallback);
itemTouchHelper.attachToRecyclerView(recyclerView);
For Kotlin geeks below is the code for the same -
val simpleCallback = object : ItemTouchHelper.SimpleCallback(0, ItemTouchHelper.DOWN) {
override fun onMove(recyclerView: RecyclerView, viewHolder: RecyclerView.ViewHolder, target: RecyclerView.ViewHolder): Boolean {
return false
}
override fun onSwiped(viewHolder: RecyclerView.ViewHolder, direction: Int) {
if (direction == ItemTouchHelper.DOWN) {
//your code for deleting the item from database or from the list
val position = viewHolder.adapterPosition
noteList.removeAt(position)
adapter.notifyItemRemoved(position)
}
}
}
val itemTouchHelper = ItemTouchHelper(simpleCallback)
itemTouchHelper.attachToRecyclerView(recycler_view)
You only need to change the method "getMovementFlags".
@Override
public int getMovementFlags(RecyclerView recyclerView, RecyclerView.ViewHolder viewHolder) {
int dragFlags = ItemTouchHelper.UP | ItemTouchHelper.DOWN;
int swipeFlags = ItemTouchHelper.START | ItemTouchHelper.END;
return makeMovementFlags(dragFlags, swipeFlags);
}
to
@Override
public int getMovementFlags(RecyclerView recyclerView, RecyclerView.ViewHolder viewHolder) {
final int swipeFlags = ItemTouchHelper.UP | ItemTouchHelper.DOWN;
final int dragFlags = ItemTouchHelper.START | ItemTouchHelper.END;
return makeMovementFlags(dragFlags, swipeFlags);
}
To delete an item, create a new method in "ItemTouchHelperAdapter" called "onSwiped" and implement it to remove the item
@Override
public boolean onSwiped(int itemPosition, int direction) {
if(direction == SimpleItemTouchHelperCallback.SWIPED_TO_END) {
list.remove(itemPosition);
notifyItemRemoved(itemPosition);
}else{
notifyItemChanged(itemPosition);
}
return true;
}
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