在Android動態列表視圖發送前添加數據

Question

我有動態列表視圖活動，它將項目轉移到另一個具有編輯文本（名稱，電話，表格）和另一個動態列表視圖的活動。

每個項目都有它應該與每個項目發送的編輯文本。

public class OrderAdapter extends BaseAdapter { 

private Context ctx; 
private LayoutInflater mInflater; 
private List<Item> orderItems; 
private DatabaseHelper helper; 

public OrderAdapter(Context context, List<Item> items) { 
    // TODO Auto-generated constructor stub 

    ctx = context; 
    helper = new DatabaseHelper(ctx); 
    mInflater = LayoutInflater.from(ctx); 
    orderItems = items; 
} 

@Override 
public int getCount() { 
    // TODO Auto-generated method stub 
    return orderItems.size(); 
} 

@Override 
public Object getItem(int position) { 
    // TODO Auto-generated method stub 
    return orderItems.get(position).getItemID(); 
} 

@Override 
public long getItemId(int position) { 
    // TODO Auto-generated method stub 
    return 0; 
} 


public class ViewHolder { 

    TextView name, desc, price, total; 
    EditText etQty; 
    Button btnDelete, btnAdd, btnMinus; 
} 

@Override 
public View getView(final int position, View convertView, ViewGroup parent) { 
    // TODO Auto-generated method stub 

    final ViewHolder holder; 

    if (convertView == null) { 

     convertView = mInflater.inflate(R.layout.order_preview_row, parent, 
       false); 

     holder = new ViewHolder(); 
     holder.name = (TextView) convertView.findViewById(R.id.c_table); 
     holder.desc = (TextView) convertView.findViewById(R.id.order_item_name); 
     holder.price = (TextView) convertView.findViewById(R.id.tvOpPrice); 
     holder.etQty = (EditText) convertView.findViewById(R.id.etQty); 

     holder.btnAdd = (Button) convertView 
       .findViewById(R.id.btnIncreaseQty); 

     holder.btnAdd.setOnClickListener(new OnClickListener() { 

      @Override 
      public void onClick(View v) { 
       // TODO Auto-generated method stub 

       float total_qty = (Float.parseFloat(holder.etQty.getText() 
         .toString()) + 1); 

       Item item = (Item) holder.etQty.getTag(); 
       item.setNoItems(String.valueOf(total_qty)); 

       holder.etQty.setText(String.valueOf(total_qty)); 

       holder.total.setText(" = " 
         + (Float.parseFloat(orderItems.get(position) 
           .getItemPrice()) * Float 
           .parseFloat(holder.etQty.getText().toString()))); 
      } 
     }); 

     holder.btnMinus = (Button) convertView 
       .findViewById(R.id.btnDecreaseQty); 

     holder.btnMinus.setOnClickListener(new OnClickListener() { 

      @Override 
      public void onClick(View v) { 
       // TODO Auto-generated method stub 

       Float total_qty = (Float.parseFloat(holder.etQty.getText() 
         .toString()) - 1); 

       if (total_qty != 0) { 

        Item item = (Item) holder.etQty.getTag(); 
        item.setNoItems(String.valueOf(total_qty)); 

        holder.etQty.setText(String.valueOf(total_qty)); 

        holder.total.setText(" = " 
          + (Float.parseFloat(orderItems.get(position) 
            .getItemPrice()) * Float 
            .parseFloat(holder.etQty.getText() 
              .toString()))); 

       } 
      } 
     }); 

     holder.btnDelete = (Button) convertView 
       .findViewById(R.id.btnDeleteItem); 

     holder.btnDelete.setOnClickListener(new OnClickListener() { 

      @Override 
      public void onClick(View v) { 
       // TODO Auto-generated method stub 

       helper.deleteItem(orderItems.get(position).getItemID()); 
       orderItems.remove(position); 
       notifyDataSetChanged(); 
      } 
     }); 

     holder.total = (TextView) convertView.findViewById(R.id.tvTotal); 
     holder.etQty.setTag(orderItems.get(position)); 
     convertView.setTag(holder); 
    } else { 

     holder = (ViewHolder) convertView.getTag(); 
     holder.etQty.setTag(orderItems.get(position)); 
    } 

    holder.name.setText(orderItems.get(position).getItemName()); 
    holder.desc.setText(orderItems.get(position).getItemDescription()); 
    holder.price.setText(orderItems.get(position).getItemPrice() + " x "); 

    holder.etQty.setText(orderItems.get(position).getNItems()); 

    holder.total 
      .setText(" = " 
        + (Float.parseFloat(orderItems.get(position) 
          .getItemPrice()) * Float 
          .parseFloat(holder.etQty.getText().toString()))); 

    return convertView; 
} 

} 

我的問題是如何調用從編輯的文本數據與例如項目名稱是每個項目

添加：「奶酪比薩餅」我希望它「2奶酪比薩餅」

@Override 
     protected Boolean doInBackground(Void... params) { 
      // TODO Auto-generated method stub 

      item_ids = new StringBuilder(); 

      for (int i = 0; i < orderItems.size(); i++) { 
       item_ids.append(orderItems.get(i).getItemID()).append(","); 
      } 

      if (item_ids.length() == 0) 
       return false; 
      else 
       item_ids.deleteCharAt(item_ids.length() - 1); 

      Log.d("OrderPreview", item_ids.toString()); 

      item_names = new StringBuilder(); 

      for (int i = 0; i < orderItems.size(); i++) { 
       item_names.append(orderItems.get(i).getItemName()).append(","); 
      } 

      if (item_names.length() == 0) 
       return false; 
      else 
       item_names.deleteCharAt(item_names.length() - 1); 

      Log.d("OrderPreview", item_names.toString()); 



      HttpClient client = new DefaultHttpClient(); 
      HttpPost post = new HttpPost(Utils.WS_ADD_ORDER); 

      List<NameValuePair> mParams = new ArrayList<NameValuePair>(); 

      mParams.add(new BasicNameValuePair("name", etName.getText() 
        .toString())); 
      mParams.add(new BasicNameValuePair("phone", etPhone.getText() 
        .toString())); 
      mParams.add(new BasicNameValuePair("table", etTable.getText() 
        .toString())); 
      mParams.add(new BasicNameValuePair("order_status", "Processing")); 
      mParams.add(new BasicNameValuePair("id", item_ids.toString())); 
      mParams.add(new BasicNameValuePair("items", item_names.toString())); 

Answer 1

在適配器中編寫一個方法，在現有項目列表中添加新項目。 ，並在從服務/ API獲取新數據集時，在異步任務中調用該方法。不要忘記將notifyDataSetChanged（）放入適配器內的該方法中。