有没有更好的方法从适配器获取对父 RecyclerView 的引用？

Question

我有一个用例，我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，我正在做的是将其分配给 onCreateViewHolder 方法中的私有类成员，该方法沿 viewGroup parent arg 传递，如下所示：

private ViewGroup mParent;

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

并像这样在onBindViewHolder 中引用父级RecyclerView：

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

有没有更好的方法来做到这一点？也许RecyclerView.Adapter 有我可能错过的方式？

Answer 1

实际上有一个特定的方法可以使用附加到适配器的RecyclerView 进行回调。只需覆盖 onAttachedToRecylerView(RecyclerView recyclerView) 方法即可。

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....
    }

Answer 2

另一种方法是在构造函数中传递引用，例如

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) {
        ...
    }
}