更改意图在一行，但影响显示在下一行

Question

嗨，朋友，我无法理解如何在列表视图的同一行中设置文本，其中我有两个按钮，文本视图在中心，但是当我我想递增或递减效果显示在下一行，但不是我想应用

CartAdapter.java

public class Cart_Adapter extends BaseAdapter { 
    Context cartcontext; 
    List<MobiData> cartlist; 
    LayoutInflater inflater; 
    cartlist cartdata; 
    public ArrayList<Integer> quantity = new ArrayList<Integer>(); 
    CustomButtonListener customButtonListener; 
    public Cart_Adapter(Context cartcontext, List<MobiData> cartlist) { 
     this.cartcontext = cartcontext; 
     this.cartlist = cartlist; 
} 
@Override 
    public int getCount() { 
     return cartlist.size(); 
    } 

    @Override 
    public Object getItem(int position) { 
     return cartlist.get(position); 
    } 

    @Override 
    public long getItemId(int position) { 
     return position; 
    } 
@Override 
    public View getView(final int position, View convertView, ViewGroup parent) { 
     inflater = (LayoutInflater) cartcontext.getSystemService(Context.LAYOUT_INFLATER_SERVICE); 

     if (convertView == null) { 
      cartdata = new cartlist(); 
      convertView = inflater.inflate(R.layout.cart_row, parent, false); 
      cartdata.decrement = (TextView) convertView.findViewById(R.id.decrement); 
      cartdata.single = (TextView) convertView.findViewById(R.id.single); 
      cartdata.single.setTag(position); 
      cartdata.increment = (TextView) convertView.findViewById(R.id.increment); 
      cartdata.increment.setTag(position); 
      cartdata.cancel = (TextView) convertView.findViewById(R.id.cancel); 
      cartdata.vcmedname = (TextView) convertView.findViewById(R.id.vcmedname); 
      cartdata.vcmedprice = (TextView) convertView.findViewById(R.id.vcmedprice); 
      Typeface carttext = Typeface.createFromAsset(cartcontext.getAssets(), "fonts/fontawesome.ttf"); 
      cartdata.decrement.setTypeface(carttext); 
      cartdata.increment.setTypeface(carttext); 
      cartdata.cancel.setTypeface(carttext); 
      convertView.setTag(cartdata); 
     } else { 
      cartdata = (cartlist) convertView.getTag(); 
     } 
     MobiData newcart = cartlist.get(position); 
     cartdata.vcmedname.setText(newcart.getVcmedname()); 
     cartdata.vcmedprice.setText(newcart.getVcmedprice()); 
     cartdata.single.setText(newcart.getVcqty()); 
     final String cartids = newcart.getVcmedid(); 
     cartdata.cancel.setOnClickListener(new View.OnClickListener() { 
      @Override 
      public void onClick(View v) { 
       cartlist.remove(position); 
       notifyDataSetChanged(); 
      } 
     }); 
     cartdata.increment.setOnClickListener(new View.OnClickListener() { 
      @Override 
      public void onClick(View v) { 
       if (customButtonListener !=null){ 
        int plus = Integer.parseInt(cartdata.single.getText().toString()); 
       plus++; 
            int plus = Integer.parseInt(cartdata.single.getText().toString()); 
       plus++; 
       cartdata.single.setText(String.valueOf(plus)); 
       SharedPreferences viewpref = cartcontext.getSharedPreferences("datapref", Context.MODE_PRIVATE); 
       String cartuid = viewpref.getString("uid", ""); 
       String carttempid = viewpref.getString("tempid", ""); 
       String incremnturl = "http://sampletemplates.net/mobichemist/json/cart_process.php?mid=" + cartids + "&userid=" + cartuid + "&tempid=" + carttempid; 
       Log.d("Incremnturl", incremnturl); 
       JsonArrayRequest incrementarray = new JsonArrayRequest(Request.Method.GET, incremnturl, (String) null, new Response.Listener<JSONArray>() { 
        @Override 
        public void onResponse(JSONArray response) { 
         for (int i = 0; i < response.length(); i++) { 
          try { 
           JSONObject incrobj = response.getJSONObject(i); 
           int plus = Integer.parseInt(cartdata.single.getText().toString()); 
           plus++; 

           cartdata.single.setText(String.valueOf(plus)); 

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

        } 
       }, new Response.ErrorListener() { 
        @Override 
        public void onErrorResponse(VolleyError error) { 
         Log.d("Incrementurl", String.valueOf(error)); 
        } 
       }); 
       incrementarray.setRetryPolicy(new DefaultRetryPolicy(50000, DefaultRetryPolicy.DEFAULT_MAX_RETRIES, 
         DefaultRetryPolicy.DEFAULT_BACKOFF_MULT)); 
          AppController.getInstance().addToRequestQueue(incrementarray); 


      } 
     }); 
     cartdata.decrement.setOnClickListener(new View.OnClickListener() { 
      @Override 
      public void onClick(View v) { 
int i = Integer.parseInt(cartdata.single.getText().toString()); 
      i--; 
      if (i <= 0) { 
       Toast.makeText(Single_Cart_Page.this, "Minimum Quantity is 1", Toast.LENGTH_SHORT).show(); 
      } else { 
       cartdata.single.setText(String.valueOf(i)); 
      } 
      } 
     }); 
     return convertView; 
    } 

    static class cartlist { 
     TextView decrement, single, increment, cancel, vcmedname, vcmedprice; 
    } 

Answer 1

试试这个，并添加您的其他代码。

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

    ViewHolder holder; 

    if (convertView == null) { 
     convertView = inflater.inflate(R.layout.cart_row, parent, false); 
     holder = new ViewHolder(); 
     holder.decrement = (TextView) convertView.findViewById(R.id.decrement); 
     holder.single = (TextView) convertView.findViewById(R.id.single); 
     holder.increment = (TextView) convertView.findViewById(R.id.increment); 
     holder.cancel = (TextView) convertView.findViewById(R.id.cancel); 
     holder.vcmedname = (TextView) convertView.findViewById(R.id.vcmedname); 
     holder.vcmedprice = (TextView) convertView.findViewById(R.id.vcmedprice); 

     convertView.setTag(holder); 
    } 
    else { 
     holder = (ViewHolder) convertView.getTag(); 
    } 
     Typeface carttext = Typeface.createFromAsset(cartcontext.getAssets(), "fonts/fontawesome.ttf"); 
     holder.decrement.setTypeface(carttext); 
     holder.increment.setTypeface(carttext); 
     holder.cancel.setTypeface(carttext); 

    MobiData newcart = cartlist.get(position); 
    holder.vcmedname.setText(newcart.getVcmedname()); 
    holder.vcmedprice.setText(newcart.getVcmedprice()); 
    holder.single.setText(newcart.getVcqty()); 
    final String cartids = newcart.getVcmedid(); 

    holder.cancel.setOnClickListener(new View.OnClickListener() { 
     @Override 
     public void onClick(View v) { 
      cartlist.remove(position); 
      notifyDataSetChanged(); 
     } 
    }); 
    return convertView; 
} 

static class ViewHolder { 

    private TextView decrement; 
    private TextView single; 
    private TextView increment; 
    private TextView vcmedname; 
    private TextView vcmedprice; 

} 

Answer 2

使用ArrayAdaper，而不是底座适配器与变化的行ViewHolder。不要为所有视图手动设置setTag（位置）。 在此处查找ViewHolder示例https://dzone.com/articles/optimizing-your-listview。它将解决您的索引问题。 ViewHolder类设置所有视图的位置。 Hold View Objects in a View Holder