I have got a list of simple items in RecyclerView. Using ItemTouchHelper it was very easy to implement "swipe-to-delete" behavior.
public class TripsAdapter extends RecyclerView.Adapter<TripsAdapter.VerticalItemHolder> {
private List<Trip> mTrips;
private Context mContext;
private RecyclerView mRecyclerView;
[...]
//Let adapter know his RecyclerView. Attaching ItemTouchHelper
@Override
public void onAttachedToRecyclerView(RecyclerView recyclerView) {
ItemTouchHelper itemTouchHelper = new ItemTouchHelper(new TripItemTouchHelperCallback());
itemTouchHelper.attachToRecyclerView(recyclerView);
mRecyclerView = recyclerView;
}
[...]
public class TripItemTouchHelperCallback extends ItemTouchHelper.SimpleCallback {
public TripItemTouchHelperCallback (){
super(ItemTouchHelper.UP | ItemTouchHelper.DOWN, ItemTouchHelper.RIGHT);
}
@Override
public boolean onMove(RecyclerView recyclerView,
RecyclerView.ViewHolder viewHolder, RecyclerView.ViewHolder target) {
//some "move" implementation
}
@Override
public void onSwiped(RecyclerView.ViewHolder viewHolder, int swipeDir) {
//AND WHAT HERE?
}
}
}
It works well. However i also need to implement some undo action or confirmation. What is the best way to do this?
First question is how to insert another view in place of removed with confirmation dialog? And how to restore swiped item, if user chooses to undo removing?
notify...()
method on theRecyclerView.Adapter
to indicate what changed in your model.