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Android - 滚动RecyclerView时为什么会丢失值EditText？

分类: 技术问答 • 2022-03-27 22:25:06

Android - 滚动RecyclerView时为什么会丢失值EditText？

问题描述：

我正在使用波纹管代码将文本转换为货币格式，但当我滚动recyclerView时，我丢失了真实数据。我能做些什么：Android - 滚动RecyclerView时为什么会丢失值EditText？

public class ManagePriceProductsAdapter extends RecyclerView.Adapter<ManagePriceProductsAdapter.ViewHolder> { 
    private List<ManagePriceProductsModel.DataValue> managePriceProductsModelList; 
    private Context context; 
    private getListDiscountInterface getListDiscountInterface; 
    private int vendorId = -1; 

    public ManagePriceProductsAdapter(Context context, 
             List<ManagePriceProductsModel.DataValue> managePriceProductsModelList, 
             getListDiscountInterface getListDiscountInterface, 
             int vendorId) { 
     this.context = context; 
     this.managePriceProductsModelList = managePriceProductsModelList; 
     this.getListDiscountInterface = getListDiscountInterface; 
     this.vendorId = vendorId; 
    } 

    @Override 
    public ManagePriceProductsAdapter.ViewHolder onCreateViewHolder(ViewGroup viewGroup, int i) { 

     View view = LayoutInflater.from(context) 
       .inflate(R.layout.list_item_manage_price_products, viewGroup, false); 

     return new ManagePriceProductsAdapter.ViewHolder(view, 
       new DiscountNumberTextWatcherWithSeperator(), 
       new OriginalNumberTextWatcherWithSeperator()); 
    } 

    public void getListDiscount() { 
     getListDiscountInterface.sendGetListDiscountToActivity(managePriceProductsModelList); 
    } 

    public void backButton() { 
     getListDiscountInterface.backButtonForListDiscount(managePriceProductsModelList); 
    } 

    public void resetAdapter() { 
     this.managePriceProductsModelList.clear(); 
     notifyDataSetChanged(); 
    } 

    @Override 
    public void onBindViewHolder(final ManagePriceProductsAdapter.ViewHolder viewHolder, int position) { 

     viewHolder.discountNumberTextWatcherWithSeperator.updatePosition(viewHolder.getAdapterPosition(), 
       viewHolder.discountPriceEdittext, 
       viewHolder.originalPriceEdittext); 

     viewHolder.originalNumberTextWatcherWithSeperator.updatePosition(viewHolder.getAdapterPosition(), 
       viewHolder.originalPriceEdittext); 

     try { 
      if (managePriceProductsModelList.get(viewHolder.getAdapterPosition()).getTitle() != null) { 
       if (!TextUtils.isEmpty(managePriceProductsModelList.get(viewHolder.getAdapterPosition()).getTitle().trim())) { 
        String productName = managePriceProductsModelList.get(viewHolder.getAdapterPosition()).getTitle().trim(); 
        viewHolder.titleTextview.setText(productName); 
       } else { 
        viewHolder.titleTextview.setText("----"); 
       } 
      } else { 
       viewHolder.titleTextview.setText("----"); 
      } 
     } catch (Exception ex) { 
      if (vendorId != -1) { 
       Throwable t = new Throwable(ex + ", vendorId: " + vendorId).fillInStackTrace(); 
       FirebaseCrash.report(t); 
      } else { 
       Throwable t = new Throwable(ex + ", vendorId: empty").fillInStackTrace(); 
       FirebaseCrash.report(t); 
      } 
     } 


     try { 
      if (managePriceProductsModelList.get(viewHolder.getAdapterPosition()).getPrice() != null) { 
       Long productPrice = managePriceProductsModelList.get(viewHolder.getAdapterPosition()).getPrice(); 
       if (productPrice != null && productPrice != 0 && productPrice > 0) { 
        viewHolder.originalPriceEdittext.setText(String.valueOf(productPrice)); 
       } else { 
        viewHolder.originalPriceEdittext.setText(""); 
       } 
      } 
     } catch (Exception ex) { 
      if (vendorId != -1) { 
       Throwable t = new Throwable(ex + ", vendorId: " + vendorId).fillInStackTrace(); 
       FirebaseCrash.report(t); 
      } else { 
       Throwable t = new Throwable(ex + ", vendorId: empty").fillInStackTrace(); 
       FirebaseCrash.report(t); 
      } 
     } 


     try { 
      if (managePriceProductsModelList.get(viewHolder.getAdapterPosition()).getDiscountedPrice() != null) { 
       Long discountPrice = managePriceProductsModelList.get(viewHolder.getAdapterPosition()).getDiscountedPrice(); 
       if (discountPrice != null && discountPrice != 0 && discountPrice > 0) { 
        viewHolder.discountPriceEdittext.setText(String.valueOf(discountPrice)); 
       } else { 
        viewHolder.discountPriceEdittext.setText(""); 
       } 
      } 
     } catch (Exception ex) { 
      if (vendorId != -1) { 
       Throwable t = new Throwable(ex + ", vendorId: " + vendorId).fillInStackTrace(); 
       FirebaseCrash.report(t); 
      } else { 
       Throwable t = new Throwable(ex + ", vendorId: empty").fillInStackTrace(); 
       FirebaseCrash.report(t); 
      } 
     } 

    } 

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

    public interface getListDiscountInterface { 
     void sendGetListDiscountToActivity(List<ManagePriceProductsModel.DataValue> managePriceProductsModelList); 

     void backButtonForListDiscount(List<ManagePriceProductsModel.DataValue> managePriceProductsModelList); 
    } 

    class ViewHolder extends RecyclerView.ViewHolder { 
     //region ViewBinding 
     @BindView(R.id.title_textview) 
     TextView titleTextview; 
     @BindView(R.id.original_price_edittext) 
     EditText originalPriceEdittext; 
     @BindView(R.id.discount_price_edittext) 
     EditText discountPriceEdittext; 
     DiscountNumberTextWatcherWithSeperator discountNumberTextWatcherWithSeperator; 
     OriginalNumberTextWatcherWithSeperator originalNumberTextWatcherWithSeperator; 

     //endregion 
     ViewHolder(View view, 
        DiscountNumberTextWatcherWithSeperator discountNumberTextWatcherWithSeperator, 
        OriginalNumberTextWatcherWithSeperator originalNumberTextWatcherWithSeperator) { 
      super(view); 
      ButterKnife.bind(this, itemView); 
      this.discountNumberTextWatcherWithSeperator = discountNumberTextWatcherWithSeperator; 
      this.discountPriceEdittext.addTextChangedListener(discountNumberTextWatcherWithSeperator); 
      this.originalNumberTextWatcherWithSeperator = originalNumberTextWatcherWithSeperator; 
      this.originalPriceEdittext.addTextChangedListener(originalNumberTextWatcherWithSeperator); 
     } 
    } 

    private class DiscountNumberTextWatcherWithSeperator implements TextWatcher { 

     private EditText discountEditText; 
     private EditText originalEditText; 
     private int position; 

     private String getDecimalFormattedString(String value) { 
      StringTokenizer lst = new StringTokenizer(value, "."); 
      String str1 = value; 
      String str2 = ""; 
      if (lst.countTokens() > 1) { 
       str1 = lst.nextToken(); 
       str2 = lst.nextToken(); 
      } 
      String str3 = ""; 
      int i = 0; 
      int j = -1 + str1.length(); 
      if (str1.charAt(-1 + str1.length()) == '.') { 
       j--; 
       str3 = "."; 
      } 
      for (int k = j; ; k--) { 
       if (k < 0) { 
        if (str2.length() > 0) 
         str3 = str3 + "." + str2; 
        return str3; 
       } 
       if (i == 3) { 
        str3 = "," + str3; 
        i = 0; 
       } 
       str3 = str1.charAt(k) + str3; 
       i++; 
      } 

     } 

     public void updatePosition(int position, 
            EditText discountEditText, 
            EditText originalEditText) { 
      this.position = position; 
      this.discountEditText = discountEditText; 
      this.originalEditText = originalEditText; 
     } 

     @Override 
     public void beforeTextChanged(CharSequence s, int start, int count, int after) { 

     } 

     @Override 
     public void onTextChanged(CharSequence charSequence, int start, int before, int count) { 
      if (charSequence.length() > 0) { 
       originalEditText.setPaintFlags(originalEditText.getPaintFlags() | Paint.STRIKE_THRU_TEXT_FLAG); 
       ManagePriceProductsModel.DataValue dataValue = new ManagePriceProductsModel.DataValue(); 
       dataValue.setTitle(managePriceProductsModelList.get(position).getTitle().trim()); 
       dataValue.setId(managePriceProductsModelList.get(position).getId()); 
       dataValue.setPrice(managePriceProductsModelList.get(position).getPrice()); 
       dataValue.setDiscountedPrice(Long.parseLong(charSequence.toString().replace(",", ""))); 
       managePriceProductsModelList.set(position, dataValue); 
      } else if (charSequence.length() == 0) { 
       originalEditText.setPaintFlags(originalEditText.getPaintFlags() & (~Paint.STRIKE_THRU_TEXT_FLAG)); 
       ManagePriceProductsModel.DataValue dataValue = new ManagePriceProductsModel.DataValue(); 
       dataValue.setTitle(managePriceProductsModelList.get(position).getTitle().trim()); 
       dataValue.setId(managePriceProductsModelList.get(position).getId()); 
       dataValue.setPrice(managePriceProductsModelList.get(position).getPrice()); 
       dataValue.setDiscountedPrice(null); 
       managePriceProductsModelList.set(position, dataValue); 
      } 
     } 

     @Override 
     public void afterTextChanged(Editable editable) { 
      try { 
       discountEditText.removeTextChangedListener(this); 
       String value = discountEditText.getText().toString(); 

       if (!value.equals("")) { 

        if (value.startsWith(".")) { 
         discountEditText.setText("0."); 
        } 
        if (value.startsWith("0") && !value.startsWith("0.")) { 
         discountEditText.setText(""); 

        } 

        String str = discountEditText.getText().toString().replaceAll(",", ""); 
        if (!value.equals("")) 
         discountEditText.setText(getDecimalFormattedString(str)); 
        discountEditText.setSelection(discountEditText.getText().toString().length()); 
       } 
       discountEditText.addTextChangedListener(this); 
      } catch (Exception ex) { 
       ex.printStackTrace(); 
       discountEditText.addTextChangedListener(this); 
      } 
     } 
    } 


    private class OriginalNumberTextWatcherWithSeperator implements TextWatcher { 

     private EditText editText; 
     private int position; 

     private String getDecimalFormattedString(String value) { 
      StringTokenizer lst = new StringTokenizer(value, "."); 
      String str1 = value; 
      String str2 = ""; 
      if (lst.countTokens() > 1) { 
       str1 = lst.nextToken(); 
       str2 = lst.nextToken(); 
      } 
      String str3 = ""; 
      int i = 0; 
      int j = -1 + str1.length(); 
      if (str1.charAt(-1 + str1.length()) == '.') { 
       j--; 
       str3 = "."; 
      } 
      for (int k = j; ; k--) { 
       if (k < 0) { 
        if (str2.length() > 0) 
         str3 = str3 + "." + str2; 
        return str3; 
       } 
       if (i == 3) { 
        str3 = "," + str3; 
        i = 0; 
       } 
       str3 = str1.charAt(k) + str3; 
       i++; 
      } 

     } 

     public void updatePosition(int position, 
            EditText editText) { 
      this.position = position; 
      this.editText = editText; 
     } 

     @Override 
     public void beforeTextChanged(CharSequence s, int start, int count, int after) { 

     } 

     @Override 
     public void onTextChanged(CharSequence charSequence, int start, int before, int count) { 
      if (charSequence.length() > 0) { 
       ManagePriceProductsModel.DataValue dataValue = new ManagePriceProductsModel.DataValue(); 
       dataValue.setTitle(managePriceProductsModelList.get(position).getTitle().trim()); 
       dataValue.setId(managePriceProductsModelList.get(position).getId()); 
       dataValue.setPrice(Long.parseLong(charSequence.toString().replace(",", ""))); 
       dataValue.setDiscountedPrice(managePriceProductsModelList.get(position).getDiscountedPrice()); 
       managePriceProductsModelList.set(position, dataValue); 
      } else if (charSequence.length() == 0) { 
       ManagePriceProductsModel.DataValue dataValue = new ManagePriceProductsModel.DataValue(); 
       dataValue.setTitle(managePriceProductsModelList.get(position).getTitle().trim()); 
       dataValue.setId(managePriceProductsModelList.get(position).getId()); 
       dataValue.setPrice(null); 
       dataValue.setDiscountedPrice(managePriceProductsModelList.get(position).getDiscountedPrice()); 
       managePriceProductsModelList.set(position, dataValue); 
      } 
     } 

     @Override 
     public void afterTextChanged(Editable editable) { 
      try { 
       editText.removeTextChangedListener(this); 
       String value = editText.getText().toString(); 

       if (!value.equals("")) { 

        if (value.startsWith(".")) { 
         editText.setText("0."); 
        } 
        if (value.startsWith("0") && !value.startsWith("0.")) { 
         editText.setText(""); 

        } 

        String str = editText.getText().toString().replaceAll(",", ""); 
        if (!value.equals("")) 
         editText.setText(getDecimalFormattedString(str)); 
        editText.setSelection(editText.getText().toString().length()); 
       } 
       editText.addTextChangedListener(this); 
      } catch (Exception ex) { 
       ex.printStackTrace(); 
       editText.addTextChangedListener(this); 
      } 
     } 
    } 
}
+1

不建议在列表视图或回收视图中使用的EditText。您应该使用TextView而不是EditText。 – Lucky

+0

但我需要改变EditText的值。 –

+1

通过点击textview设置，你可以打开一个对话框来轻松改变数值。 – Lucky

答

如上的意见，不建议在recyclerview使用的EditText。

如果你必须这样做，你可以尝试使用

viewHolder.setIsRecyclable(false);

在onBindViewHolder方法

+0

@穆拉特古奇。优秀 。谢谢 –

+1

没问题！快乐编码:) –

+0

@穆拉特古奇。一个问题 。此代码在所有设备和Apis上都可以使用？ –

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