Context for RecyclerView.Adapter

Question

I want to add `ProgressDialog` in an adapter. AFAIK, `.this` for activity, and `getActivity.getApplicationContext()` for fragment. What about adapter? Is it possible? I got error `Unable to add window -- token null is not valid; is your activity running?` when I use `mContext.getApplicationContext()`. EDIT: In a fragment, I show cards by ``` allGroupsView = (RecyclerView) rootView.findViewById(R.id.allGroupsView); adapterGroup = new AdapterGroup(getActivity().getApplicationContext(), results); allGroupsView.setAdapter(adapterGroup); allGroupsView.setLayoutManager(new LinearLayoutManager(getActivity().getApplicationContext())); ``` In class `AdapterGroup` ``` public class AdapterGroup extends RecyclerView.Adapter { private Context mContext; private LayoutInflater inflater; List data= Collections.emptyList(); DataGroup current; public AdapterGroup(Context context, List results) { this.mContext = context; inflater = LayoutInflater.from(mCont…

Accepted Answer

I've seen a lot of code where people keep reference to the Context in an Adapter. But in a RecyclerView.Adapter, the itemView (the view you already inflated from onCreateViewHolder) is accessible from your ViewHolder. For the most part, you should be dealing with the viewHolder anyways. So, use viewholder.itemView.getContext();. You can even expose a method in your viewholder getContext().

```
public Context getContext() {return itemView.getContext();}
```

Context for RecyclerView.Adapter

Solution

Problem