如何在适配器外部的 ListView 和 GridView 中获取项目位置?

How to get the item position in a ListView and GridView outside the adapter?

我正在尝试通过他的视图层次结构获取视图位置。

当我有 RecyclerView 时,为了获取当前视图位置,我会这样做:

if(view.getParent() instanceof RecyclerView){ 
  RecyclerView rv = (RecyclerView)view.getParent();
  if(rv.getLayoutManager()!=null) {
     position = rv.getLayoutManager().getPosition(view);
  }
}

但是当 ListView 或 GridView 出现时,我无法让布局管理器获取视图的位置。这个想法是以一种通用的方式实现它,不知道视图具有的自定义适配器

我试图通过 ListView 和 GridView 适配器获取位置,但我没有看到任何方法可以做到这一点。

有人可以帮助我吗? 非常感谢!

为外部适配器创建获取位置的接口class

这是适配器代码:

public class ReportMediaAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder> {
    private ArrayList<File> reportMediaList = new ArrayList<>();
    private Context context;
    private int selectedPos = -1;
    private OnRemoveImage onRemoveImage;

    public ReportMediaAdapter(Context context, ArrayList<File> reportMediaList, OnRemoveImage onRemoveImage) {
        this.reportMediaList = reportMediaList;
        this.onRemoveImage = onRemoveImage;
        this.context = context;
    }

    **public interface OnRemoveImage {
        void onRemove(int pos);
    }**

    public class MyViewHolder extends RecyclerView.ViewHolder {
        private ImageView iv_image, iv_remove;

        public MyViewHolder(View itemView) {
            super(itemView);
            iv_image = itemView.findViewById(R.id.iv_image);
            iv_remove = itemView.findViewById(R.id.iv_remove);
        }
    }

    @Override
    public int getItemCount() {
        return reportMediaList.size()-1;
    }


    @NonNull
    @Override
    public RecyclerView.ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
        View itemView = LayoutInflater.from(parent.getContext()).inflate(R.layout.adapter_media, parent, false);
        return new MyViewHolder(itemView);
    }

    @Override
    public void onBindViewHolder(@NonNull RecyclerView.ViewHolder holder, int position) {
        try {
            MyViewHolder menuItemHolder = (MyViewHolder) holder;
            CommonMethods.loadImage(context, reportMediaList.get(position), menuItemHolder.iv_image);
            menuItemHolder.iv_remove.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    **onRemoveImage.onRemove(position);**
                }
            });

        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

这里是activity代码:

@Override
    public void onRemove(int pos) {

        // use adapter position

    }

我找到了解决方案:

if(view.getParent() instanceof ViewGroup) {
   position = ((ViewGroup)view.getParent()).indexOfChild(view);
}