Android：如何为Android ListView实现这样的操作？

Question

我的应用程序具有如下功能：

我已完成使用自定义适配器设置值。但现在我想实现这样的功能：添加另一个数据、删除显示数据、转到下一个数据并返回到上一个数据。在所有这些功能中，只有蓝色值应该改变。 （即代码中的 orderStatus）。左一个值 (orderName()) 应保持不变。那么如何实施呢？

如果我要添加新数据，那么它应该被临时存储，因为我想在报告中显示该数据。

在我的应用程序中，我将第一次添加数据，如下代码所示：

getOrder 函数设置 OrderName 和 OrderStatus 的值。

    public void getOrders(){
        try{
//              if(employee)
//              {
                    System.out.println("You are in Employee");
                    m_orders = new ArrayList<Order>();
                    payListForEmployee = new String[] {"Tax Code","Pay period Begin","Pay Frequency","Salary/Wage per pay",
                        "Net or Gross Amount","KS Employee deduction","KS Employee contributions","Child Support deduction","Payroll giving donation"};

                    Order o[]=new Order[payListForEmployee.length];
                    System.out.println("The Length is: "+payListForEmployee.length);
                    for (int i = 0; i < payListForEmployee.length; i++) 
                    {
                        o[i]=new Order();
                        o[i].setOrderName(payListForEmployee[i]);

                        //myPrefs = this.getSharedPreferences("myPrefs", MODE_WORLD_READABLE);
                        // for TAXCODE
                        if(i==0) {
                            taxCodeValue = PAYEEmployeeDetail.taxCodeFinalValue;
                            if((taxCodeValue==null)) {
                                taxCodeValue = "Please select";
                            }
                            o[i].setOrderStatus(taxCodeValue);
                            //System.out.println("The Value is: "+o[i].getOrderStatus());

                        }
                        // for Pay Period Frequency
                        if(i==1) {
                            //payPeriodValue = myPrefs.getString("payperiod", "12 09 2011");
                            payPeriodValue =  PAYEEmployeeDetail.payPeriodFinalValue;
                            if((payPeriodValue==null)) {
                                payPeriodValue = "--/--/----";
                            }
                            o[i].setOrderStatus(payPeriodValue);
                            //System.out.println("The Value is: "+o[i].getOrderStatus());
                        }
                        // for Pay frequency
                        if(i==2) {
                            //payFrequencyValue = myPrefs.getString("payfrequency", "Weekly");
                            payFrequencyValue =  PAYEEmployeeDetail.payFrequencyFinalValue;
                            if((payFrequencyValue==null)) {
                                payFrequencyValue = "Please select";
                            }
                            o[i].setOrderStatus(payFrequencyValue);
                            //System.out.println("The Value is: "+o[i].getOrderStatus());
                        }
                        // for salary / wage
                        if(i==3) {
                            salaryWageValue =  PAYEEmployeeDetail.salaryWageFinalValue;
                            if((salaryWageValue==null)||(salaryWageValue.equals(""))) {
                                salaryWageValue = "$0";
                            }
                            else{
                                salaryWageValue = "$"+salaryWageValue;
                            }
                            o[i].setOrderStatus(salaryWageValue);
                            //System.out.println("The Value is: "+o[i].getOrderStatus());
                        }
                        // For Gross / Net
                        if(i==4) {

                            o[i].setOrderStatus("Gross");
                            //System.out.println("The Value is: "+o[i].getOrderStatus());
                        }
                        // for KS Employee Deduction
                        if(i==5) {
                            employeeDeductionValue =  PAYEEmployeeDetail.employeeDeductionFinalValue;
                            if((employeeDeductionValue==null)||(employeeDeductionValue.equals(""))) {
                                employeeDeductionValue = "0%";
                            }
                            o[i].setOrderStatus(employeeDeductionValue);
                            //System.out.println("The Value is: "+o[i].getOrderStatus());
                        }
                        // for KS Employee Contribution
                        if(i==6) {
                            employeeContributionValue =  PAYEEmployeeDetail.employeeContributionFinalValue;
                            if((employeeContributionValue==null)||(employeeContributionValue.equals(""))) {
                                employeeContributionValue = "0%";
                            }
                            else{
                                employeeContributionValue = employeeContributionValue+"%";
                            }
                            o[i].setOrderStatus(employeeContributionValue);
                            //System.out.println("The Value is: "+o[i].getOrderStatus());
                        }
                        // for Child Support Deduction
                        if(i==7) {
                            childSupportDeductionValue =  PAYEEmployeeDetail.childSupportDeductionFinalValue;
                            if((childSupportDeductionValue==null)||(childSupportDeductionValue.equals(""))) {
                                childSupportDeductionValue = "$0";
                            }
                            else{
                                childSupportDeductionValue = "$"+childSupportDeductionValue;
                            }
                            o[i].setOrderStatus(childSupportDeductionValue);
                            //System.out.println("The Value is: "+o[i].getOrderStatus());
                        }
                        // for Payroll giving donation
                        if(i==8) {
                            payrollDonationValue =  PAYEEmployeeDetail.payrollDonationFinalValue;
                            if((payrollDonationValue==null)||(payrollDonationValue.equals(""))) {
                                payrollDonationValue = "$0";
                            }
                            else{
                                payrollDonationValue = "$"+payrollDonationValue;
                            }
                            o[i].setOrderStatus(payrollDonationValue);
                            //System.out.println("The Value is: "+o[i].getOrderStatus());
                        }
                        m_orders.add(o[i]);
                        //lv.invalidate();
//                      System.out.println("==> TaXCode Value: "+PAYEEmployeeDetail.taxCodeFinalValue);
//                      System.out.println("==> PAyPeriod Value: "+PAYEEmployeeDetail.payPeriodFinalValue);
//                      System.out.println("==> PayFrequency Value: "+PAYEEmployeeDetail.payFrequencyFinalValue);
//                      System.out.println("==> Salary/Wage Value: "+PAYEEmployeeDetail.salaryWageFinalValue);
//                      System.out.println("==> Gross/Net Value "+"STATIC VALUE = GROSS");
//                      System.out.println("==> Employee Deduction Value "+PAYEEmployeeDetail.employeeDeductionFinalValue);
//                      System.out.println("==> Employee Contribution Value "+PAYEEmployeeDetail.employeeContributionFinalValue);
//                      System.out.println("==> Child Support Deduction Value "+PAYEEmployeeDetail.childSupportDeductionFinalValue);
//                      System.out.println("==> PayRoll Donation Value "+PAYEEmployeeDetail.payrollDonationFinalValue);
//                      
                    }
//              }
//              else
//              {
//                  System.out.println("You Are in Employer");
//                  m_orders = new ArrayList<Order>();
//                  
//                  payListForEmployer = new String[] {"Tax Code","Pay period Begin","Pay Frequency","Salary/Wage per pay",
//                          "Net or Gross Amount","KiwiSaver Member","Employee Deduction","Employee Contributions",
//                          "Complying Fund Member","Fund Contribution","ESCT Tax Rate","Child Support Deduction","Payroll giving donation"};
//                  
//                  System.out.println("The Length is: "+payListForEmployer.length);
//                  
//                  Order o[]=new Order[payListForEmployer.length];
//                  for (int i = 0; i < payListForEmployer.length; i++) 
//                  {
//                      o[i]=new Order();
//                      o[i].setOrderName(payListForEmployer[i]);
//                      o[i].setOrderStatus("Pending");
//                      m_orders.add(o[i]);
//                  }
//              }

                Thread.sleep(100);
                Log.i("ARRAY", ""+ m_orders.size());
            } catch (Exception e) { 
                e.printStackTrace();
         }
         runOnUiThread(returnRes);
    }
private Runnable returnRes = new Runnable() {

        @Override
        public void run() {
            if(m_orders != null && m_orders.size() > 0){

                m_adapter.notifyDataSetChanged();
                for(int i=0;i<m_orders.size();i++)
                    m_adapter.add(m_orders.get(i));
            }
           // m_ProgressDialog.dismiss();
            m_adapter.notifyDataSetChanged();
        }
};

并像这样创建和调用线程：

 viewOrders = new Runnable(){
        @Override
        public void run() {
            getOrders();
        }
    };

    thread =  new Thread(null, viewOrders, "MagentoBackground");
    thread.start();

所以请帮助我给出该逻辑，或者给出一些可以帮助我实现该功能的代码。 谢谢。

Answer 1

根据你的问题

我已完成使用自定义适配器设置值。但现在我想要
实现添加其他数据、删除等功能
显示数据，转到下一个数据并返回到上一个数据。在所有这一切中
仅应更改蓝色值的功能。 （即
代码中的 orderStatus）。左一个值 (orderName()) 应保留为
相同的。那么如何实现呢？

这是我的几个步骤的答案，假设您在 var 'A' 中传递列表值：

1。您应该在自定义适配器<中扩展BaseAdapter列表的 /code>。

2.将初始值设置为A并将其传递给适配器并将其设置为列表视图。

3. 现在，如果您想添加更多值，则将其添加到您的 var A 中并调用 notifyDataSetChanged() 会将您的新值反映到列表中。

4. 如果您想显示下一个值，则还要在 A 中设置适当的值并调用 notifyDataSetChanged()。

5. 如果您想删除，则将 setOnItemClickListener() 添加到列表中，然后单击从 A 中删除值并调用 notifyDataSetChanged ()。

注意：要保存列表值，您可以使用 SQLite。您可以通过 lisview 来学习本教程。