java - 根据值禁用 ListView 内的按钮 - Android

Question

我正在尝试根据值禁用自定义 ListView 中特定项目的按钮。但它禁用了 ListView 中所有项目的按钮。我的 CustomAdapter 代码如下

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

        View vi = convertView;
        ViewHolder holder;

        if(convertView==null){

            vi = inflater.inflate(R.layout.tabitem, null);   

            holder = new ViewHolder();
            holder.txtRef = (TextView) vi.findViewById(R.id.lst_txt_jobpartid);
            holder.txtDate=(TextView)vi.findViewById(R.id.lst_txt_date);
            holder.txtTime=(TextView)vi.findViewById(R.id.lst_txt_time);
            holder.txtNotes=(TextView)vi.findViewById(R.id.lst_txt_notes);
            holder.txtPick=(TextView)vi.findViewById(R.id.lst_txt_pick);
            holder.txtVia=(TextView)vi.findViewById(R.id.lst_txt_via);
            holder.txtDrop=(TextView)vi.findViewById(R.id.lst_txt_drop);
            holder.txtPassengers=(TextView)vi.findViewById(R.id.lst_txt_passangers);
            holder.txtSuitcases=(TextView)vi.findViewById(R.id.lst_txt_luggages);
            holder.txtChildseat=(TextView)vi.findViewById(R.id.lst_txt_childseat);
            holder.txtFlight=(TextView)vi.findViewById(R.id.lst_txt_flight);
            holder.txtExpArrival=(TextView)vi.findViewById(R.id.lst_txt_expArrival);
            holder.txtMeetnGreet=(TextView)vi.findViewById(R.id.lst_txt_meetngreet);
            holder.txtVehicle=(TextView)vi.findViewById(R.id.lst_txt_vehicle);
            holder.txtReturn=(TextView)vi.findViewById(R.id.lst_txt_waitnrtn);
            holder.txtFee=(TextView)vi.findViewById(R.id.lst_txt_fee);
            holder.txtTopup=(TextView)vi.findViewById(R.id.lst_txt_topup);
            holder.txtPay=(TextView)vi.findViewById(R.id.lst_txt_paymethod);
            holder.txtPrice=(TextView)vi.findViewById(R.id.lst_txt_price);
            holder.btnAccept=(Button)vi.findViewById(R.id.lst_btnAccept);

            vi.setTag( holder );
        }
        else
            holder=(ViewHolder)vi.getTag();

        if(data.size()<=0)
        {

        }
        else
        {
            tempValues=null;
            tempValues = ( job_details ) data.get( position );                                          

  holder.txtRef.setText(String.valueOf(tempValues.getRequestedJobPartID()));    
            SimpleDateFormat sdf = new SimpleDateFormat("dd/MM/yyyy");
            String dateString = sdf.format(tempValues.getPickupDate());
            holder.txtDate.setText(dateString);    
            sdf = new SimpleDateFormat("HH:mm");
            dateString = sdf.format(tempValues.getPickupDate());
            holder.txtTime.setText(dateString);    
            holder.txtNotes.setText(tempValues.getNotes());    
            holder.txtPick.setText(tempValues.getPickupAddress());    
            holder.txtVia.setText(tempValues.getViaLocations());    
            holder.txtDrop.setText(tempValues.getDropoffAddress());                           holder.txtPassengers.setText(String.valueOf(tempValues.getPassengers()));    holder.txtSuitcases.setText(String.valueOf(tempValues.getSuitcases()));
            holder.txtChildseat.setText(tempValues.getChildSeat());
            holder.txtFlight.setText(tempValues.getFlightNumber());
            sdf = new SimpleDateFormat("yyyyMMdd  kk:mm");

            if(tempValues.getExpFlightArrival()!=null) {
                dateString = sdf.format(tempValues.getExpFlightArrival());
                holder.txtExpArrival.setText(dateString);    
            }    
            holder.txtMeetnGreet.setText(tempValues.getMeetAndGreet());    
            holder.txtVehicle.setText(tempValues.getVehicleType());    
            holder.txtReturn.setText(tempValues.getJourneyType());                                      holder.txtFee.setText(String.valueOf(tempValues.getBookingFee()));holder.txtTopup.setText(String.valueOf(tempValues.getAdjustment()));
            holder.txtPay.setText(tempValues.getPaymentMethod());
            holder.txtPrice.setText(tempValues.getTotalFare());
            Button btn1=(Button)vi.findViewById(R.id.lst_btnReject);
            Button btn=(Button)vi.findViewById(R.id.lst_btnAccept);
//Checking the value and disabling/enabling the buttons
            if(tempValues.getRequestStatus()=="Accepted")
            {
                holder.btnAccept.setEnabled(false);
                holder.btnAccept.setEnabled(false);
            }
            else
            {
                holder.btnAccept.setEnabled(true);
                holder.btnAccept.setEnabled(true);
            }    

            Button btn2=(Button)vi.findViewById(R.id.lst_btnStart); 
            btn2.setOnClickListener(new OnItemClickListener(position, "Start", tempValues.getRequestedJobPartID()));

//vi.setOnClickListener(new OnItemClickListener(position));

        }
        return vi;
    }

任何建议将不胜感激。

ListView 项上的单击事件也不起作用。我尝试删除按钮并将以下行放入 xml 中。我还尝试在代码中将 focusable 设置为 flase。

android:focusable="false"
android:focusableInTouchMode="false"

Answer 1

二元运算符 == 比较内存地址。

if(tempValues.getRequestStatus().equal("Accepted"))
            {
                holder.btnAccept.setEnabled(false);
                holder.btnAccept.setEnabled(false);
            }
            else
            {
                holder.btnAccept.setEnabled(true);
                holder.btnAccept.setEnabled(true);
            } 

关于 String 类:

equals() 方法比较 String 实例内部(在堆上)的“值”，无论两个对象引用是否引用同一个 String 实例。如果任意两个 String 类型的对象引用引用同一个 String 实例，那就太好了!如果两个对象引用引用两个不同的 String 实例..它没有什么区别。它是正在比较的每个 String 实例内的“值”(即:字符数组的内容)。