Question

您好我正在使用循环器视图根据显示视图的值从json检索图像和文本。如果数据小于10日期，则所有工作正常在回收者视图中只有10个图像显示一次。在我向下滚动并向上滚动图像后，图像消失了。不知道我错在哪里。

这是我的代码

jsondata
         "DATA":[
         {
        "ID":"82",
        "MSG":"",
         "IMAGE":"http://14.18.19.15/data/chat_img/20160308102624439533297.jpg",
         "TYPE":"1",
         "STATUS":"0",
        "DATE":"2016-03-08 10:26:24"
         },
         {
         "ID":"81",
         "MSG":"saggergergergaskfasjdfahsdfalshdfaldfafdjkahsdfkjahlfdkjahfls",
         "IMAGE":"",
         "TYPE":"1",
         "STATUS":"0",
         "DATE":"2016-03-08 10:25:40"
         },
        {
        "ID":"80",
        "MSG":"Hi",
        "IMAGE":"",
        "TYPE":"2",
        "STATUS":"0",
        "DATE":"2016-03-07 13:24:00"
         },....
       ]
Activity code

       recyclerView = (RecyclerView) findViewById(R.id.my_recycler_view);
        context=this;
        messege = new ArrayList<String>();
        date = new ArrayList<String>();
        image = new ArrayList<String>();
        getjsondata();
        //adapter = new RecyclerAdapter(context, stockArr);
        //recyclerView.setAdapter(adapter);


       // Toast.makeText(getApplicationContext(),""+stockArr.length,Toast.LENGTH_SHORT).show();
        System.out.print("ARRRRRRRRRRRRRRRRRRRRRRY"+stockArr);
        recyclerView.setHasFixedSize(true);
        recyclerView.setLayoutManager(new LinearLayoutManager(this));

    }


    public void getjsondata()
    {
                 StringRequest stringRequest = new StringRequest(Request.Method.POST, REGISTER_URL,
                new Response.Listener<String>() {
                    @Override
                    public void onResponse(String response) {

                     //   Toast.makeText(MainActivity.this, response, Toast.LENGTH_LONG).show();
                        try {
                            JSONObject homeobj = new JSONObject(response);
                            JSONObject insteller  = homeobj.getJSONObject("INSTELLAR");
                            status = insteller.getString("STATUS");

                            if(status.equals("success")) {
                                JSONArray data = insteller.getJSONArray("DATA");
                                for(int i=0; i < data.length(); i++) {
                                    JSONObject jsonObject = data.getJSONObject(i);
                                    msg = jsonObject.getString("MSG").toString();
                                    img =jsonObject.getString("IMAGE").toString();
                                    dte =jsonObject.getString("DATE").toString();
                                    messege.add(msg);
                                    date.add(dte);
                                    image.add(img);

                                }
                                 stockArr = new String[messege.size()];
                                 stockArr = messege.toArray(stockArr);
                                 stockArr1 = new String[date.size()];
                                stockArr1 = date.toArray(stockArr1);
                                stockArr2 = new String[image.size()];
                                stockArr2 = image.toArray(stockArr2);
                               /* for(String s : stockArr)
                                    System.out.println(s);*/
                                    Toast.makeText(getApplicationContext(),"TOAST SIZE"+messege.size(), Toast.LENGTH_SHORT).show();
                                adapter = new RecyclerAdapter(context, stockArr,stockArr1,stockArr2);
                                recyclerView.setAdapter(adapter);


                            }
                            else
                            {
                                Toast.makeText(MainActivity.this, "Failed", Toast.LENGTH_LONG).show();
                            }
                        } catch (JSONException e) {
                            e.printStackTrace();
                            Toast.makeText(MainActivity.this, "Error in Json", Toast.LENGTH_LONG).show();
                        }


                    }
                },
                new Response.ErrorListener() {
                    @Override
                    public void onErrorResponse(VolleyError error) {
                        Toast.makeText(MainActivity.this, error.toString(), Toast.LENGTH_LONG).show();
                    }
                }) {
            @Override
            protected Map<String, String> getParams() {
                Map<String, String> params = new HashMap<String, String>();
                params.put("clientid", KEY_ClientID);
                params.put("adminid", KEY_ADMINID);
                params.put("userid", KEY_USERID);
                return params;
            }

        };

        RequestQueue requestQueue = Volley.newRequestQueue(this);
        requestQueue.add(stringRequest);
    }


    }

Adapter.java

public class RecyclerAdapter extends        

           RecyclerView.Adapter<RecyclerViewHolder> {

    String name[];
    String image[];
    String date[];
    // String [] date={"date1","date2","date3","date4"};

        Context context;
    LayoutInflater inflater;
    public RecyclerAdapter(Context context, String[] message,String[] datee,String[] imageee) {

        this.context=context;
        inflater=LayoutInflater.from(context);
        name=message;
        date=datee;
        image=imageee;



    }
    @Override
    public RecyclerViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        View v=inflater.inflate(R.layout.item_list, parent, false);
        RecyclerViewHolder viewHolder=new RecyclerViewHolder(v);
        return viewHolder;
    }

    @Override
    public void onBindViewHolder(RecyclerViewHolder holder, int position)
    {

         try
         {
                if(name[position].equals("")) {
                    for(int i = 0;i<image.length;i++) {
                        Picasso.with(context).load(image[position]).into(holder.imageView);
                        holder.imageView.setTag(holder);
                        holder.tv2.setText(date[position]);
                    }
                }
                  if(image[position].equals(""))
                 {
                     holder.imageView.setVisibility(View.GONE);
                 holder.tv1.setText(name[position]);
                 holder.tv2.setText(date[position]);
                 }



                //  holder.tv1.setVisibility(View.GONE);


            } catch (Exception e) {
                e.printStackTrace();
           //  holder.tv1.setVisibility(View.GONE);
             //   holder.imageView.setVisibility(View.GONE);
                // holder.imageView.setTag(holder);
            }

    }





    @Override
    public int getItemCount() {

        return name.length;

    }
     }

Answer 1

RecyclerView重用行视图。因此，一旦设置为消失，您的ImageView可见性永远不可见。只需在if(image[position].equals(""))添加其他内容，如下所示

       else{
         holder.imageView.setVisibility(View.Visible);
       }

让我知道这是否有效。

Answer 2

如果您更改了视图状态，请确保每个视图状态都匹配，因为转换视图已记住视图状态。

if(flag){
      view.changeState();
      }else{
      view.changeState();
      }

图像在recyclerview中的imageview中仅显示一次

2 个答案: