Is there a better way of getting a reference to the parent RecyclerView from the adapter?

Question

I have a use case where I need a reference to the parent RecyclerView from inside the adapter, specifically inside the onBindViewHolder method. So far what I am doing is assigning it to a private class member in the onCreateViewHolder method passing along the viewGroup parent arg like so:

private ViewGroup mParent;  @Override public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {     // inflater logic.     mParent = parent; } 

And referencing the parent RecyclerView in onBindViewHolder like this:

@Override public void onBindViewHolder(ViewHolder holder, int position) {     // binder logic.     ((RecyclerView)mParent).blahBlahBlah(); } 

Is there a better way of doing this? Maybe RecyclerView.Adapter has a way that I may have missed?

Answer 1

There's actually a specific method that callsback with the RecyclerView that attaches to the adapter. Just override the onAttachedToRecylerView(RecyclerView recyclerView) method.

public class Adapter_RV extends RecyclerView.Adapter<RecyclerView.ViewHolder>{      RecyclerView mRecyclerView;        @Override     public void onAttachedToRecyclerView(RecyclerView recyclerView) {         super.onAttachedToRecyclerView(recyclerView);          mRecyclerView = recyclerView;     }      @Override     public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {         return null;     }      @Override     public void onBindViewHolder(RecyclerView.ViewHolder holder, int position) {          mRecyclerView....     }