等待绑定数据，直到响应进入Recycler视图适配器

Question

我正在开发一个应用程序，该应用程序要求单击鼠标即可发出服务器请求，一切正常，但是我的代码不会等到响应到来之后才对Image视图进行设置，是否有人面对同样的问题，找到解决方案。

我的适配器代码是：

 public class DocumentAdapter extends RecyclerView.Adapter<DocumentAdapter.ViewHolder> implements  Response.ErrorListener{
        Context context;
        private ArrayList<FetchDocument> docDatalist;
        private int expandedPosition = -1;
        int customerSerial;
        private int vinappserial;
        ViewHolder holderNew;


        UtilityOfActivity utilityOfActivity;
        List<ImageFetchResponseDocumentList> list = new ArrayList<>();



        public DocumentAdapter(ArrayList<FetchDocument> docDatalist, Context context,String vinappserial) {
            this.docDatalist = docDatalist;
            this.context = context;
            utilityOfActivity = new UtilityOfActivity((Activity) context);
            this.vinappserial= Integer.valueOf(vinappserial);

            UserDetail userDetail = new Gson().fromJson(PrefrenceFile.getInstance().getString(Constant.PREF_KEY_USER_DATA), UserDetail.class);
            customerSerial = userDetail.getLoginResponse().getCustInfo().getCustSerialNo();
        }

        @Override
        public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
            View v = LayoutInflater.from(parent.getContext()).inflate(R.layout.fragment_document_listview_adapter, parent, false);

            ViewHolder viewHolder = new ViewHolder(v);


            return viewHolder;
        }
        @Override
        public void onBindViewHolder(final ViewHolder holder, final int position) {
            holder.doc_type.setText(docDatalist.get(position).getDocTypeDesc());
            if (position == expandedPosition) {
                holder.myDocumentlistexpeded.setVisibility(View.VISIBLE);
            } else {
                holder.myDocumentlistexpeded.setVisibility(View.GONE);
            }
            holder.myDocumentListCollapse.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View view) {


    //by the below line I am making the request
                    imagerequestserver(docDatalist.get(position), vinappserial);
    //here I am setting the image to the imageview this code execute before response come
                    for (int i = 0; i < list.size(); i++) {
                        NetworkImageView imageView = new NetworkImageView(context);
                        imageView.setAdjustViewBounds(true);
                       imageView.setImageUrl(list.get(i).getNewFilePath().concat(list.get(i).getNewFilename()), VolleyRequestQue.getmInstance(context).getImageLoader());
                        holder.horizontal_scrollView_linear.addView(imageView);
                    }
                    if (expandedPosition >= 0) {
                        int prev = expandedPosition;
                        notifyItemChanged(prev);
                    }
                    // Set the current position to "expanded"
                    expandedPosition = holder.getPosition();
                    notifyItemChanged(expandedPosition);
                    holder.myDocumentlistexpeded.setVisibility(View.VISIBLE);
                }
            });
            holder.layoutAddDoc.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View view) {
                    holder.expanded_menu_cameraImage.setVisibility(View.VISIBLE);
                }
            });
        }

        @Override
        public int getItemCount() {
            return docDatalist.size();
        }
        public  interface SendHoldertdata{
             void setdata(ViewHolder holder,  int position);
        }

        class ViewHolder extends RecyclerView.ViewHolder {
            TextView doc_type;
            LinearLayout myDocumentlistexpeded;
            LinearLayout myDocumentListCollapse;
            LinearLayout horizontal_scrollView_linear;
            LinearLayout expanded_menu_cameraImage;
            RelativeLayout layoutAddDoc;

            public ViewHolder(View itemView) {
                super(itemView);
                doc_type = (TextView) itemView.findViewById(R.id.doc_type);
                myDocumentlistexpeded = (LinearLayout) itemView.findViewById(R.id.myDocumentlistexpeded);
                myDocumentListCollapse = (LinearLayout) itemView.findViewById(R.id.myDocumentListCollapse);
                horizontal_scrollView_linear = (LinearLayout) itemView.findViewById(R.id.horizontal_scrollView_linear);
                expanded_menu_cameraImage = (LinearLayout) itemView.findViewById(R.id.expanded_menu_cameraImage);
                layoutAddDoc = (RelativeLayout) itemView.findViewById(R.id.layoutAddDoc);


            }

        }
        public void imagerequestserver(FetchDocument fetchDocument, int vinappserial) {

            ImageFetchRequest imageFetchRequest = new ImageFetchRequest();

            imageFetchRequest.setCustSerial(customerSerial);
            imageFetchRequest.setDocGroup(fetchDocument.getDocTypeCode());
            imageFetchRequest.setVehSerial(String.valueOf(vinappserial));
            imageFetchRequest.setDocSerial("0");
            String url = Constant.API_MAIN + Constant.API_DOCUMENT_IMAGEFETCH;
            AbstractVolleyRequest jsonObjectrequest = new
                    AbstractVolleyRequest(url, this, new DocumentAdapter.DocumentImageFetchResponseListner(fetchDocument, vinappserial), imageFetchRequest, Request.Method.POST);
            jsonObjectrequest.setTag("DocumentImageFetchRequest");
            Log.v("DocumentFetchRequest", "DocumentImageFetchRequest" + jsonObjectrequest);
            VolleyRequestQue.getmInstance(context.getApplicationContext()).addToRequestQueue(jsonObjectrequest);

        }
        @Override
        public void onErrorResponse(VolleyError error) {
            if (context != null) {
                utilityOfActivity.progresDissmiss();
            }
            utilityOfActivity.toast(context.getString(R.string.connectivity_server_error));
        }

        public class DocumentImageFetchResponseListner extends MyListner<ImageFetchResponse> {
            ImageFetchResponse response;
            FetchDocument fetchDocument;
            String vinappserial;

            public DocumentImageFetchResponseListner(FetchDocument fetchDocument, int vinappserial) {

                super(ImageFetchResponse.class);
                this.vinappserial = String.valueOf(vinappserial);
                this.fetchDocument = fetchDocument;
              //  this.moveFromDocList = moveFromDocList;
                utilityOfActivity.progressDialogShow(context.getString(R.string.please_wait));
            }

            @Override
            public void onResponse(MyResponse instaResponse) {
                utilityOfActivity.progresDissmiss();
                if (instaResponse != null) {
                    if (instaResponse instanceof ImageFetchResponse) {
                        response = (ImageFetchResponse) instaResponse;
                        if (response.getResult().getResultStatus().contains("SUCCESS")) {

                            list = response.getDocumentList();
                            Log.d("","");
                            if (list.size() > 0) {

                            } else {
                               // imageDelete.setVisibility(View.GONE);
                             //   no_media.setVisibility(View.VISIBLE);
                            }
                           /*else {
                                if (moveFromDocList)
                                utilityOfActivity.moveFragment(FragmentAddDocument.newInstance(fetchDocument, vinappserial), Constant.TAG_GLOBAL_2, R.id.container);
                            }*/
                        } else {
                            utilityOfActivity.toast(context.getString(R.string.connectivity_server_error));
                        }
                    }
                }
            }





        }
}

对于代码中的任何澄清，请问我：

Answer 1

if (response.getResult().getResultStatus().contains("SUCCESS")) {
    List<ImageFetchResponseDocumentList> newList = response.getDocumentList();
    list.addAll(newList);
    Log.d("","");
    ....
}

检查此代码。 并且不要将请求api放入适配器。 阅读链接