只有在onclicklistener后显示Recycler视图的最后一个元素

Question

我试图从服务器检索我的数据，然后在RecyclerView的帮助下显示它。我的RecyclerView包含4个按钮，每个按钮将数据发送到不同的表格。这是我的尝试：

public class QuoteAdapter extends RecyclerView.Adapter<QuoteAdapter.ViewHolder> { 
    List<QuoteList> qItems; 
    String sQuote,sName,sEmail; 
    public QuoteAdapter(List<QuoteList> qItems) { 
     this.qItems = qItems; 
    } 

    @Override 
    public QuoteAdapter.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) { 
     View v = LayoutInflater.from(parent.getContext()).inflate(R.layout.fetch_list, parent, false); 
     ViewHolder viewHolder = new ViewHolder(v); 
     return viewHolder; 
    } 

    @Override 
    public void onBindViewHolder(final QuoteAdapter.ViewHolder holder, int position) { 
     final QuoteList codeListBeans = qItems.get(position); 
     final Background background = new Background(); 
     holder.tv_quote.setText(codeListBeans.getQuote()); 
     holder.tv_name.setText(codeListBeans.getName()); 
     holder.tv_email.setText(codeListBeans.getEmail()); 
     sQuote=holder.tv_quote.getText().toString(); 
     sName=holder.tv_name.getText().toString(); 
     sEmail=holder.tv_email.getText().toString(); 

     holder.btn_other.setOnClickListener(new View.OnClickListener() { 
      @Override 
      public void onClick(View view) { 
       url = "http://velapanti.esy.es/quotation/other/add.php"; 
       background.execute(sQuote, sEmail, sName); 
      } 
     }); 
     holder.btn_love.setOnClickListener(new View.OnClickListener() { 
      @Override 
      public void onClick(View view) { 
       url = "http://velapanti.esy.es/quotation/love/add.php"; 
       background.execute(sQuote, sEmail, sName); 
      } 
     }); 
     holder.btn_mot.setOnClickListener(new View.OnClickListener() { 
      @Override 
      public void onClick(View view) { 
       url = "http://velapanti.esy.es/quotation/motivation/add.php"; 
       background.execute(sQuote, sEmail, sName); 
      } 
     }); 
     holder.btn_frnd.setOnClickListener(new View.OnClickListener() { 
      @Override 
      public void onClick(View view) { 
       url = "http://velapanti.esy.es/quotation/friends/add.php"; 
       background.execute(sQuote, sEmail, sName); 
      } 
     }); 

    } 

    class ViewHolder extends RecyclerView.ViewHolder { 

     public TextView tv_name, tv_quote, tv_email; 
     public Button btn_other, btn_mot, btn_love, btn_frnd; 
     public ViewHolder(View itemView) { 
      super(itemView); 
      tv_quote = (TextView) itemView.findViewById(R.id.tv_quote); 
      tv_name = (TextView) itemView.findViewById(R.id.tv_name); 
      tv_email = (TextView) itemView.findViewById(R.id.tv_email); 
      btn_frnd = (Button) itemView.findViewById(R.id.btn_frnd); 
      btn_love = (Button) itemView.findViewById(R.id.btn_love); 
      btn_mot = (Button) itemView.findViewById(R.id.btn_mot); 
      btn_other = (Button) itemView.findViewById(R.id.btn_other); 
     } 
    } 

    @Override 
    public int getItemCount() { 
     return qItems.size(); 
    } 

    class Background extends AsyncTask<String, String, String> { 
     @Override 
     protected void onPreExecute() { 

      if (isConnection()) { 
       super.onPreExecute(); 
       progressDialog.show(); 
      } else { 
       showConnectionErrorDialog(); 
       startActivity(getIntent()); 
      } 
     } 

     @Override 
     protected String doInBackground(String... strings) { 
      sQuote = strings[0]; 
      sEmail = strings[1]; 
      sName = strings[2]; 

      try { 
       URL openUrl = new URL(url); 
       HttpURLConnection httpURLConnection = (HttpURLConnection) openUrl.openConnection(); 
       httpURLConnection.setRequestMethod("POST"); 
       httpURLConnection.setDoOutput(true); 

       OutputStream OS = httpURLConnection.getOutputStream(); 
       BufferedWriter bufferedWriter = new BufferedWriter(new OutputStreamWriter(OS, "UTF-8")); 
       String data = URLEncoder.encode("quote", "UTF-8") + "=" + URLEncoder.encode(sQuote, "UTF-8") 
         + "&" + 

         URLEncoder.encode("email", "UTF-8") + "=" + URLEncoder.encode(sEmail, "UTF-8") 
         + "&" + 

         URLEncoder.encode("name", "UTF-8") + "=" + URLEncoder.encode(sName, "UTF-8"); 
       bufferedWriter.write(data); 
       bufferedWriter.flush(); 
       bufferedWriter.close(); 
       OS.close(); 
       InputStream IS = httpURLConnection.getInputStream(); 
       IS.close(); 
       httpURLConnection.disconnect(); 
       return "Quotation Added"; 
      } catch (MalformedURLException e) { 
       e.printStackTrace(); 
      } catch (IOException e) { 
       e.printStackTrace(); 
      } 
      return null; 
     } 

     @TargetApi(Build.VERSION_CODES.JELLY_BEAN) 
     @Override 
     protected void onPostExecute(String result) { 
      progressDialog.dismiss(); 
      Snackbar.make(layout, result, Snackbar.LENGTH_LONG) 
        .setAction("Action", null).show(); 
     } 
    } 
} 

是我面临的是，当我点击任何按钮的问题，从最后一排移动到表格不管行从我点击按钮的数据，即，如果我点击任何行的按钮都会发送最后一行的数据，但不会从该按钮所属的行中发送。

Answer 1

这里的问题很简单。在您的onBindViewHolder()方法中，您将获得data（sQuote，sEmail，sName）并独立存储它们。现在当RecyclerView完成向所有View添加和设置数据时，您的data容器也会更新，以便您的data包含最后onBindView()调用的值。

也就是说，如果您要向下滚动并点击，则会从View发送data。同样，如果您要向上滚动，则会从顶部最明显的View发送数据。

您需要想出一种方法，以便您的data保持更新。

赞同而不是从sQuote等获取数据等从qItems获取数据。

另外作为一般规则，不要在onBindViewHolder()中创建新对象，而应在onCreateViewHolder()或ViewHolder中创建新对象。因为无论何时滚动回View，都会创建另一个Object。

对于需要位置点击的位置的听众View将它们放在ViewHolder（就像你的情况一样）。因此，您可以通过getAdapterPosition()轻松获得点击的View的位置。