Der Index wird nicht aktualisiert, es sei denn, der Artikel wird zweimal im Adapter

Question

gedrückt. Aus irgendeinem Grund aktualisiert die Variable mItemIndex ihren Wert erst, wenn ich denselben Eintrag zweimal drücke.

Doch als ich beide Instanzen von mItemIndex protokollierte, protokollierten sie unterschiedliche Werte. Was ist hier falsch? Ich habe das den ganzen Tag über getestet, aber ich kann keine passende Lösung dafür finden.

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

Sie aktualisieren mItemIndex innerhalb weniger Bedingungen. Können Sie in der getView() - Methode des Adapters die untere Zeile hinzufügen? mItemIndex = Position;