動態的ListView滾動的TextView自動

Question

改變。

我應該爲停留增量價格做些什麼？

這裏是我的適配器

public class ListAdapter extends BaseAdapter { 

public ArrayList<Integer> quantity = new ArrayList<Integer>(); 
public ArrayList<Integer> price = new ArrayList<Integer>(); 
private String[] listViewItems, prices, static_price; 
TypedArray images; 
View row = null; 

static String get_price, get_quntity; 
int g_quntity, g_price, g_minus; 

private Context context; 
CustomButtonListener customButtonListener; 

static HashMap<String, String> map = new HashMap<>(); 


public ListAdapter(Context context, String[] listViewItems, TypedArray images, String[] prices) { 
    this.context = context; 
    this.listViewItems = listViewItems; 
    this.images = images; 
    this.prices = prices; 

    for (int i = 0; i < listViewItems.length; i++) { 
    quantity.add(0); 
    price.add(0); 
    } 
} 

public void setCustomButtonListener(CustomButtonListener customButtonListner) { 
    this.customButtonListener = customButtonListner; 
} 

@Override 
public int getCount() { 
    return listViewItems.length; 
} 

@Override 
public String getItem(int position) { 
    return listViewItems[position]; 
} 


@Override 
public long getItemId(int position) { 
    return 0; 
} 

@Override 
public View getView(final int position, View convertView, ViewGroup parent) { 

    final ListViewHolder listViewHolder; 
    if (convertView == null) { 
    LayoutInflater layoutInflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE); 
    row = layoutInflater.inflate(R.layout.activity_custom_listview, parent, false); 
    listViewHolder = new ListViewHolder(); 
    listViewHolder.tvProductName = (TextView) row.findViewById(R.id.tvProductName); 
    listViewHolder.ivProduct = (ImageView) row.findViewById(R.id.ivproduct); 
    listViewHolder.tvPrices = (TextView) row.findViewById(R.id.tvProductPrice); 
    listViewHolder.btnPlus = (ImageButton) row.findViewById(R.id.ib_addnew); 
    listViewHolder.edTextQuantity = (EditText) row.findViewById(R.id.editTextQuantity); 
    listViewHolder.btnMinus = (ImageButton) row.findViewById(R.id.ib_remove); 
    static_price = context.getResources().getStringArray(R.array.Price); 
    row.setTag(listViewHolder); 
    } else { 
    row = convertView; 
    listViewHolder = (ListViewHolder) convertView.getTag(); 
    } 


    listViewHolder.ivProduct.setImageResource(images.getResourceId(position, -1)); 


    try { 

    listViewHolder.edTextQuantity.setText(quantity.get(position) + ""); 

    } catch (Exception e) { 
    e.printStackTrace(); 
    } 

    listViewHolder.btnPlus.setOnClickListener(new View.OnClickListener() { 

    @Override 
    public void onClick(View v) { 
    if (customButtonListener != null) { 
    customButtonListener.onButtonClickListener(position, listViewHolder.edTextQuantity, 1); 

    quantity.set(position, quantity.get(position) + 1); 
    price.set(position, price.get(position) + 1); 

    row.getTag(position); 

    get_price = listViewHolder.tvPrices.getText().toString(); 

    g_price = Integer.valueOf(static_price[position]); 

    get_quntity = listViewHolder.edTextQuantity.getText().toString(); 
    g_quntity = Integer.valueOf(get_quntity); 

    map.put("" + listViewHolder.tvProductName.getText().toString(), " " + listViewHolder.edTextQuantity.getText().toString()); 
    listViewHolder.tvPrices.setText("" + g_price * g_quntity); 
//     Log.d("A ", "" + a); 
//     Toast.makeText(context, "A" + a, Toast.LENGTH_LONG).show(); 
//     Log.d("Position ", "" + position); 
//     System.out.println(+position + " Values " + map.values()); 
    ShowHashMapValue(); 
    listViewHolder.tvPrices.setText("" + g_price * g_quntity); 
    } 


    } 

    }); 
    listViewHolder.btnMinus.setOnClickListener(new View.OnClickListener() { 
    @Override 
    public void onClick(View v) { 
    if (customButtonListener != null) { 
    customButtonListener.onButtonClickListener(position, listViewHolder.edTextQuantity, -1); 
    if (quantity.get(position) > 0) 
     quantity.set(position, quantity.get(position) - 1); 

    get_price = listViewHolder.tvPrices.getText().toString(); 
    g_minus = Integer.valueOf(get_price); 
    g_price = Integer.valueOf(static_price[position]); 
    int minus = g_minus - g_price; 
    if (minus >= g_price) { 
     listViewHolder.tvPrices.setText("" + minus); 
    } 

    map.put("" + listViewHolder.tvProductName.getText().toString(), " " + listViewHolder.edTextQuantity.getText().toString()); 
    ShowHashMapValue(); 
    } 
    } 
    }); 
    listViewHolder.tvProductName.setText(listViewItems[position]); 
    listViewHolder.tvPrices.setText(prices[position]); 

    return row; 
} 

private void ShowHashMapValue() { 

    /** 
    * get the Set Of keys from HashMap 
    */ 
    Set setOfKeys = map.keySet(); 

/** 
* get the Iterator instance from Set 
*/ 
    Iterator iterator = setOfKeys.iterator(); 

/** 
* Loop the iterator until we reach the last element of the HashMap 
*/ 
    while (iterator.hasNext()) { 
/** 
* next() method returns the next key from Iterator instance. 
* return type of next() method is Object so we need to do DownCasting to String 
*/ 
    String key = (String) iterator.next(); 

/** 
* once we know the 'key', we can get the value from the HashMap 
* by calling get() method 
*/ 
    String value = map.get(key); 

    System.out.println("Key: " + key + ", Value: " + value); 
    } 
} 
} 

Answer 1

在的onclick，你遞減後的值調用notifyDataSetChanged（）

notifyDataSetChanged

，但其昂貴的操作，因爲它刷新完整列表