Sqlite游标不返回数据[重复]

Question

游标携带数据有问题，调试，我知道了"java.lang.IllegalStateException: Cannot perform this operation because the connection pool has been closed."。

但是我仍然无法调整光标问题，我知道在光标返回数据之前不应该关闭连接，但我不知道如何调整它。

我想从 getEmpData 方法中获取一些信息，然后传递它。

我的方法：

public Cursor getEmpData(Integer employeeID)
        {
            EmpDept = getReadableDatabase();
            Integer[] empRow = {employeeID};

            Cursor c = EmpDept.rawQuery("Select name, Title, phone, email from Employee where EmpID like ?", new String[]{employeeID.toString()});
            if (c != null)
            {
                c.moveToFirst();
            }
            EmpDept.close();
            return c;

        }

列表视图部分：

单击名称时，它应该将数据移动到新活动。

       namelist.setOnItemClickListener(new AdapterView.OnItemClickListener() {
              @Override
              public void onItemClick(AdapterView<?> parent, View view, int position, long id)
              {
                  String name = namelist.getItemAtPosition(position).toString();
                   //Getting ID of emp,dept
                  Cursor empID = Emp.getEmpID(name);
                  Cursor DepID = Emp.getDeptID(name);
                  int eID = empID.getInt(0);
                  int dID = DepID.getInt(0);



                  Intent intent = new Intent(MainActivity.this, empDetails.class);

                  intent.putExtra("empName", Emp.getEmpData(eID).toString());
                  intent.putExtra("empTitle",Emp.getEmpData(eID).toString());
                  intent.putExtra("empPhone",Emp.getEmpData(eID).toString());
                  intent.putExtra("empEmail",Emp.getEmpData(eID).toString());

                  intent.putExtra("empDept",Emp.getDeptName(dID).toString());
                  startActivity(intent);
              }
          });

Answer 1

使用此代码：

public Employee getEmpData(Integer employeeID)
        {
            EmpDept = getReadableDatabase();
            Integer[] empRow = {employeeID};

            Cursor c = EmpDept.rawQuery("Select name, Title, phone, email, dept from Employee where EmpID like ?", new String[]{employeeID.toString()});
            Employee employee = new Employee();
            if (c != null && c.getCount() > 0 && c.moveToFirst())
            {
                employee.setName(c.getString(0));
                employee.setTitle(c.getString(1));
                employee.setPhone(c.getString(2));
                employee.setEmail(c.getString(3));
                employee.setDept(c.getString(4));
            }
            c.close();
            return employee;

        }

你的清单部分：

    Intent intent = new Intent(MainActivity.this, empDetails.class);
    Employee employee = Emp.getEmpData(eID);
    intent.putExtra("empName", employee.getName());
    intent.putExtra("empTitle",employee.getTitle());
    intent.putExtra("empPhone",employee.getPhone());
    intent.putExtra("empEmail",employee.getEmail());
    intent.putExtra("empDept",employee.getDept());

而Employee 是一个对象，包括姓名、职务、电话、电子邮件、部门及其getter 和setter。