有没有更好的方法从适配器获取对父回收视图的引用？

我有一个用例，需要从适配器内部引用父 RecyclerView，特别是在 onBindViewHolder方法内部。到目前为止，我所做的是将它分配给 onCreateViewHolder方法中的一个私有类成员，像这样传递 viewGroup parent参数:

private ViewGroup mParent;


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

像这样引用 onBindViewHolder中的母 RecyclerView:

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

有没有更好的方法? 也许 RecyclerView.Adapter有一个方法，我可能已经错过了？

34260

public final class MyAdapter extends RecyclerView.Adapper { private final recyclerView; public MyAdapter(@NonNull RecyclerView recyclerView) { this.recyclerView = recyclerView; } ... @Override public void onBindViewHolder(ViewHolder holder, int position) { ... } }

小开

最佳答案

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....
}