アイテムがアダプタで2回押し込まれない限りインデックスは更新されません

Question

何らかの理由で、同じアイテムを2回押すまで、変数mItemIndexはその値を更新しません。

しかし、私はmItemIndexの両方のインスタンスをログに記録したとき、異なる値を記録しました。ここで何が間違っていますか？私は一日中これをデバッグしてきましたが、適切な解決策を見つけることができません。

package com.app.burgerking.menu.category.product; 

import java.text.NumberFormat; 
import java.util.ArrayList; 
import java.util.Arrays; 
import java.util.List; 

import android.annotation.SuppressLint; 
import android.app.AlertDialog; 
import android.content.Context; 
import android.content.DialogInterface; 
import android.graphics.Color; 
import android.graphics.Typeface; 
import android.net.ParseException; 
import android.util.Log; 
import android.view.LayoutInflater; 
import android.view.View; 
import android.view.View.OnClickListener; 
import android.view.ViewGroup; 
import android.widget.BaseAdapter; 
import android.widget.ImageView; 
import android.widget.RelativeLayout; 
import android.widget.TextView; 
import android.widget.Toast; 

import com.app.burgerking.R; 
import com.app.burgerking.layout.FontHandler; 
import com.app.burgerking.models.ModifierGroup; 
import com.app.burgerking.models.ModifierItem; 

import android.content.SharedPreferences; 

/*** Reference to Pass TextView to Adapter: 
http://stackoverflow.com/questions/9785523/on-button-click-how-to-increment-counter-and-show-in-textview 
***/ 

public class ModifierGridViewAdapter extends BaseAdapter { 

    private Context mContext; 
    private List<ModifierItem> mItems; 
    private Typeface berthold; 
    private String mModGroupId; 

    private TextView tv_totalPrice; 
    private TextView tv_totalPrice2; 
    private int mItemIndex = -1; 

    private TextView tv_availableOptionsCount; 
    private ModifierGroup mModGroup; 
    private NumberFormat nf; 

    // Gregg's Code 
    private static final String ACTIVITY = "languageStorage"; 
    private static String savedLanguage = ""; 

    private static SharedPreferences spLanguage; 
    // End 

    public ModifierGridViewAdapter(Context context) { 
     mContext = context; 
     mItems = new ArrayList<ModifierItem>(); 
     berthold = FontHandler.getTypefaceBertholdCondensed(); 
     nf = NumberFormat.getInstance(mContext.getResources().getConfiguration().locale); 

     // Gregg's Code 
     spLanguage = mContext.getSharedPreferences(ACTIVITY, Context.MODE_PRIVATE); 
     // End 
    } 

    @Override 
    public int getItemViewType(int position) { 
     int type; 

     if (mModGroup.getMax() <= 1) { 
      // Load Second Layout (Layout with only touch events) 
      type = 1; 
     } else { 
      // Load First Layout (Layout with Increment/Decrement buttons) 
      type = 0; 
     } 

     return type; 
    } 

    public void setTotalPriceTextView(TextView textViewFromActivity) { 
     this.tv_totalPrice = textViewFromActivity; 
    } 

    public void setTotalPriceTextView2(TextView textViewFromActivity) { 
     this.tv_totalPrice2 = textViewFromActivity; 
    } 

    public void setAvailableOptionsCount(TextView textViewFromActivity) { 
     this.tv_availableOptionsCount = textViewFromActivity; 
    } 

    public void setModifierGroup(ModifierGroup modGroupFromActivity) { 
     this.mModGroup = modGroupFromActivity; 
    } 

    public void setItems(List<ModifierItem> items, String id) { 
     mItems = items; 
     mModGroupId = id; 
    } 

    public int countSelected() { 
     int count = 0; 
     for (int i = 0; i < mItems.size(); i++) { 
      if (mItems.get(i).isSelected()) 
       count++; 
     } 
     return count; 
    } 

    private List<ModifierItem> getSelectedModifiers() { 
     List<ModifierItem> list = new ArrayList<ModifierItem>(); 
     for (int i = 0; i < mItems.size(); i++) { 
      ModifierItem item = mItems.get(i); 
      if (item.isSelected()) { 
       item.setGroupId(mModGroupId); 
       list.add(item); 
      } 
     } 
     return list; 
    } 

    public ModifierGroup getModifierGroup() { 
     String id = mModGroupId; 
     int min = -999; 
     int max = -999; 
     int free = -999; 
     String name = null; 
     List<ModifierItem> items = getSelectedModifiers(); 
     return new ModifierGroup(id, min, max, free, name, items); 
    } 

    public double getTotalPrice() { 
     double ret = 0.0; 
     for (ModifierItem item : mItems) { 
      ret += (item.getPrice() * item.getQuantity()); 
     } 

     return ret; 
    } 

    @Override 
    public int getCount() { 
     return mItems.size(); 
    } 

    @Override 
    public ModifierItem getItem(int pos) { 
     return mItems.get(pos); 
    } 

    @Override 
    public long getItemId(int pos) { 
     return pos; 
    } 

    public void highlightSelected(ViewHolder holder, final int position) { 
     getItem(position).setQuantity(getItem(position).getQuantity() + 1); 

     double convertedTotalPrice = 0.0; 
     double convertedTotalPrice2 = 0.0; 

     try { 
      convertedTotalPrice = nf.parse(tv_totalPrice.getText().toString() 
        .substring(0, tv_totalPrice.getText().toString().indexOf(" "))).doubleValue(); 

      convertedTotalPrice2 = nf.parse(tv_totalPrice2.getText().toString() 
        .substring(0, tv_totalPrice2.getText().toString().indexOf(" "))).doubleValue(); 

     } catch (java.text.ParseException e) { 
      e.printStackTrace(); 
     } 

     convertedTotalPrice += getItem(position).getPrice(); 
     convertedTotalPrice2 += getItem(position).getPrice(); 

     tv_totalPrice.setText(String.format("%.2f " + mContext.getString(R.string.sar_string), 
       convertedTotalPrice)); 
     tv_totalPrice2.setText(String.format("%.2f " + mContext.getString(R.string.sar_string), 
       convertedTotalPrice2)); 

     holder.container.setBackgroundResource(R.drawable.modifier_button_toggled); 
     holder.name.setTextColor(Color.parseColor("#ffffff")); 
     holder.img.setImageResource(R.drawable.checkout_check); 
     holder.price.setTextColor(Color.parseColor("#ffffff")); 
    } 

    public void unhighlightSelected(ViewHolder holder, final int position) { 
     decrementAvailableOptions(tv_availableOptionsCount); 
     getItem(position).setQuantity(getItem(position).getQuantity() - 1); 

     double convertedTotalPrice = 0.0; 
     double convertedTotalPrice2 = 0.0; 

     try { 
      convertedTotalPrice = nf.parse(tv_totalPrice.getText().toString() 
        .substring(0, tv_totalPrice.getText().toString().indexOf(" "))).doubleValue(); 

      convertedTotalPrice2 = nf.parse(tv_totalPrice2.getText().toString() 
        .substring(0, tv_totalPrice2.getText().toString().indexOf(" "))).doubleValue(); 

     } catch (java.text.ParseException e) { 
      e.printStackTrace(); 
     } 

     convertedTotalPrice -= getItem(position).getPrice(); 
     convertedTotalPrice2 -= getItem(position).getPrice(); 

     tv_totalPrice.setText(String.format("%.2f " + mContext.getString(R.string.sar_string), convertedTotalPrice)); 
     tv_totalPrice2.setText(String.format("%.2f " + mContext.getString(R.string.sar_string), convertedTotalPrice2)); 

     holder.container.setBackgroundResource(R.drawable.modifier_button_untoggled); 
     holder.name.setTextColor(Color.parseColor("#777777")); 
     holder.img.setImageResource(R.drawable.checkout_add); 
     holder.price.setTextColor(Color.parseColor("#777777")); 
    } 

    @Override 
    public View getView(final int position, View convertView, ViewGroup parent) { 
     LayoutInflater inflater = LayoutInflater.from(mContext); 
     final ViewHolder holder; 
     savedLanguage = new String(spLanguage.getString("language", "")); 
     int type = getItemViewType(position); 

     if (convertView == null) { 
      switch (type) { 

      case 1: // Modifier Group has only less than or equal to one Available Option 
       convertView = inflater.inflate(R.layout.modifier_item, parent, false); 

       holder = new ViewHolder(); 

       holder.container = (RelativeLayout) convertView.findViewById(R.id.modifier_item_container); 
       holder.img = (ImageView) convertView.findViewById(R.id.modifier_item_image); 
       holder.name = (TextView) convertView.findViewById(R.id.modifier_item_name); 
       holder.price = (TextView) convertView.findViewById(R.id.modifier_item_price); 

       convertView.setTag(holder); 

       convertView.setTag(R.id.modifier_item_container, holder.container); 
       convertView.setTag(R.id.modifier_item_image, holder.img); 
       convertView.setTag(R.id.modifier_item_name, holder.name); 
       convertView.setTag(R.id.modifier_item_price, holder.price); 

       if (getItem(position).getQuantity() > 0) { 
        mItemIndex = position; 
        highlightSelected(holder, position); 
       } 

       convertView.setOnClickListener(new OnClickListener() { 

        @Override 
        public void onClick(View view) { 

         Log.d("INDEX", Integer.toString(mItemIndex)); 

         // Case 1: The user deselects the item he/she selected. 
         if (getItem(position).getQuantity() > 0) { 
          mItemIndex = -1; 
          Log.d("INDEX 2", Integer.toString(mItemIndex)); 
          unhighlightSelected(holder, position); 


         } else { 

         } 


        } 

       }); 

       break; 

      case 0: // Modifier Group has more than one Available Option 
       convertView = inflater.inflate(R.layout.modifier_item_2, parent, false); 

       holder = new ViewHolder(); 

       holder.container = (RelativeLayout) convertView.findViewById(R.id.modifier_item_container_2); 
       holder.incrementImg = (ImageView) convertView.findViewById(R.id.modifier_item_increment_quantity); 
       holder.quantity = (TextView) convertView.findViewById(R.id.modifier_item_quantity); 
       holder.decrementImg = (ImageView) convertView.findViewById(R.id.modifier_item_decrement_quantity); 
       holder.name = (TextView) convertView.findViewById(R.id.modifier_item_name_2); 
       holder.price = (TextView) convertView.findViewById(R.id.modifier_item_price_2); 

       convertView.setTag(holder); 

       convertView.setTag(R.id.modifier_item_container_2, holder.container); 
       convertView.setTag(R.id.modifier_item_increment_quantity, holder.incrementImg); 
       convertView.setTag(R.id.modifier_item_quantity, holder.quantity); 
       convertView.setTag(R.id.modifier_item_decrement_quantity, holder.decrementImg); 
       convertView.setTag(R.id.modifier_item_name_2, holder.name); 
       convertView.setTag(R.id.modifier_item_price_2, holder.price); 

       holder.quantity.setText(Integer.toString(getItem(position).getQuantity())); 
       holder.quantity.setTypeface(berthold); 

       holder.incrementImg.setOnClickListener(new OnClickListener() { 

        @Override 
        public void onClick(View v) { 
         if (isAvailableCountBelowZero(tv_availableOptionsCount)) { 
          displayErrorMessage(); 
          return; 
         } 

         int acquiredQuantity = Integer.parseInt(holder.quantity.getText().toString()); 
         acquiredQuantity += 1; 
         getItem(position).setQuantity(acquiredQuantity); 

         double convertedTotalPrice = 0.0; 
         double convertedTotalPrice2 = 0.0; 

         try { 
          convertedTotalPrice = nf.parse(tv_totalPrice.getText().toString() 
            .substring(0, tv_totalPrice.getText().toString().indexOf(" "))).doubleValue(); 

          convertedTotalPrice2 = nf.parse(tv_totalPrice2.getText().toString() 
            .substring(0, tv_totalPrice2.getText().toString().indexOf(" "))).doubleValue(); 

         } catch (java.text.ParseException e) { 
          e.printStackTrace(); 
         } 

         convertedTotalPrice += getItem(position).getPrice(); 
         convertedTotalPrice2 += getItem(position).getPrice(); 

         tv_totalPrice.setText(String.format("%.2f " + mContext.getString(R.string.sar_string), 
           convertedTotalPrice)); 
         tv_totalPrice2.setText(String.format("%.2f " + mContext.getString(R.string.sar_string), 
           convertedTotalPrice2)); 

         holder.quantity.setText(Integer.toString(acquiredQuantity)); 
        } 

       }); 

       holder.decrementImg.setOnClickListener(new OnClickListener() { 

        @Override 
        public void onClick(View v) { 
         int acquiredQuantity = Integer.parseInt(holder.quantity.getText().toString()); 
         if (acquiredQuantity - 1 < 0) {acquiredQuantity = 0;} 
         else { 
          decrementAvailableOptions(tv_availableOptionsCount); 
          acquiredQuantity -= 1; 
          getItem(position).setQuantity(acquiredQuantity); 

          double convertedTotalPrice = 0.0; 
          double convertedTotalPrice2 = 0.0; 

          try { 
           convertedTotalPrice = nf.parse(tv_totalPrice.getText().toString() 
             .substring(0, tv_totalPrice.getText().toString().indexOf(" "))).doubleValue(); 

           convertedTotalPrice2 = nf.parse(tv_totalPrice2.getText().toString() 
             .substring(0, tv_totalPrice2.getText().toString().indexOf(" "))).doubleValue(); 

          } catch (java.text.ParseException e) { 
           e.printStackTrace(); 
          } 

          convertedTotalPrice -= getItem(position).getPrice(); 
          convertedTotalPrice2 -= getItem(position).getPrice(); 

          tv_totalPrice.setText(String.format("%.2f " + mContext.getString(R.string.sar_string), 
            convertedTotalPrice)); 
          tv_totalPrice2.setText(String.format("%.2f " + mContext.getString(R.string.sar_string), 
            convertedTotalPrice2)); 
         } 
         holder.quantity.setText(Integer.toString(acquiredQuantity)); 
        } 

       }); 

       break; 

      default: 
       convertView = inflater.inflate(R.layout.modifier_item, parent, false); 

       holder = new ViewHolder(); 

       holder.container = (RelativeLayout) convertView.findViewById(R.id.modifier_item_container); 
       holder.img = (ImageView) convertView.findViewById(R.id.modifier_item_image); 
       holder.name = (TextView) convertView.findViewById(R.id.modifier_item_name); 
       holder.price = (TextView) convertView.findViewById(R.id.modifier_item_price); 

       convertView.setTag(holder); 

       convertView.setTag(R.id.modifier_item_container, holder.container); 
       convertView.setTag(R.id.modifier_item_image, holder.img); 
       convertView.setTag(R.id.modifier_item_name, holder.name); 
       convertView.setTag(R.id.modifier_item_price, holder.price); 

       break; 
      } 

     } 
     else { 
      holder = (ViewHolder) convertView.getTag(); 
     } 

     if (savedLanguage.equals("ar")) { 
      holder.name.setText(getItem(position).getAltName().toUpperCase()); 
     } else { 
      holder.name.setText(getItem(position).getName().toUpperCase()); 
     } 

     holder.price.setText(String.format("%.2f " + mContext.getString(R.string.sar_string), 
       getItem(position).getPrice())); 

     holder.name.setTypeface(berthold); 
     holder.price.setTypeface(berthold); 

     return convertView; 
    } 

    public void decrementAvailableOptions(TextView tv_count) { 
     int availableCount = Integer.parseInt(tv_count.getText().toString()); 

     if (availableCount + 1 > mModGroup.getMax()) { 
      availableCount = mModGroup.getMax(); 
     } else { 
      availableCount += 1; 
      if ((mModGroup.getSelectedCount() - 1) < 0) { 
       mModGroup.setSelectedCount(0); 
      } else { 
       mModGroup.setSelectedCount(mModGroup.getSelectedCount() - 1); 
      } 
     } 

     tv_count.setText(Integer.toString(availableCount)); 
    } 

    public boolean isAvailableCountBelowZero(TextView tv_count) { 
     boolean isBelowZero = false; 
     int availableCount = Integer.parseInt(tv_count.getText().toString()); 

     if (availableCount - 1 < 0) { 
      isBelowZero = true; 
     } 
     else { 
      mModGroup.setSelectedCount(mModGroup.getSelectedCount() + 1); 
      tv_count.setText(Integer.toString(availableCount - 1)); 
     } 
     return isBelowZero; 
    } 

    public void displayErrorMessage() { 
     AlertDialog.Builder builder = new AlertDialog.Builder(mContext); 
     builder.setTitle("Add-On Limit"); 
     builder.setMessage("You have exceeded the maximum number of items you can add."); 
     builder.setPositiveButton("OK", new DialogInterface.OnClickListener() { 
      @Override 
      public void onClick(DialogInterface dialog, int which) { 
       dialog.dismiss(); 
      } 
     }); 
     builder.show(); 
    } 

    private class ViewHolder { 
     RelativeLayout container; 
     ImageView img; 
     ImageView incrementImg; 
     TextView quantity; 
     ImageView decrementImg; 
     TextView name; 
     TextView price; 
    } 
} 

Answer 1

いくつかの条件の中でmItemIndexを更新しています。アダプタのgetView（）メソッドに以下の行を追加できますか？ mItemIndex = position;