/**
    * 監聽總金額變化
    */
    private void listenAllFee() {
        double allPay = 0.00;
        for (int u = 0; u < dataList.size(); u++) {
            Boolean checked = mAdapter.getIsSelected().get(u);
            NeedPayBillsBean billsBean = dataList.get(u);
            String fee = billsBean.getFee();
            double
 
 allFee = Double.parseDouble(fee);
            if(checked){
                allPay+=allFee;
            }
        }
        //把double型別累加結果--保持2位小數點
        DecimalFormat df = new DecimalFormat("#####0.00");
        String str = df.format(allPay);
        KLog.e(str);
        //總金額顯示
        mAllPay.setText(str);
    }
 

**//把double型別累加結果--保持2位小數點
DecimalFormat df = new DecimalFormat("#####0.00");
String str = df.format(allPay);**