I have a recycler view and I want to perform click on one of its items.
Here is my code:
mRecyclerView.findViewHolderForAdapterPosition(2).itemView.performClick(); It works fine when the item is visible, but when it is not visible i'm getting a null pointer exception
also i tried scroll to position before perform click but i got same result
Any idea on how to solve this issue?
I have solved my problem with this code
mRecyclerView.getLayoutManager().scrollToPosition(17); search_list.postDelayed(new Runnable() { @Override public void run() { mRecyclerView.findViewHolderForAdapterPosition(17).itemView.performClick(); } }, 50); There is a slight delay for the viewholder to be created. Thus if the item is clicked before viewholder is created an NPE would occur
Unfortunately for you, this is working as intended. When a child View is scrolled out of the boundaries of a RecyclerView, the child View is often reused to display another item for another position in the list, hence you will get a null View for the position that is no longer displayed.
What you can do is implement a getItem() on the RecyclerView.Adapter to retrieve the item for that position. Not sure if that satisfies your requirements though.
It is recommended to use a listener to wait for the drawing to complete, Then perform the operation you want.
recyclerView.getViewTreeObserver().addOnGlobalLayoutListener( new ViewTreeObserver.OnGlobalLayoutListener() { @Override public void onGlobalLayout() { // At this point the layout is complete recyclerView.getViewTreeObserver().removeOnGlobalLayoutListener(this); } }); This works for me. Regards!
void emulate_userClick() { RecyclerView.ViewHolder xView = xRecycler.findViewHolderForAdapterPosition(xPosition); if( isNull(xView) ) { xRecycler.removeOnScrollListener(listener_onScroll); xRecycler.addOnScrollListener(listener_onScroll); xRecycler.smoothScrollToPosition(xPosition); } else { Objects.requireNonNull( xRecycler.findViewHolderForAdapterPosition(xPosition)).itemView.performClick(); } } RecyclerView.OnScrollListener listener_onScroll = new RecyclerView.OnScrollListener() { @Override public void onScrollStateChanged(RecyclerView recyclerView, int newState) { switch (newState) { case SCROLL_STATE_IDLE: //we reached the target position Objects.requireNonNull(xRecycler.findViewHolderForAdapterPosition(xPosition)).itemView.performClick(); recyclerView.removeOnScrollListener(this); break; } } };