如何摧毁片段实例变量用户注销后

Question

我必须从服务器获取数据，第一次当用户的土地上片段然后数据应在申请，除非用户登出坚持，但我想这样。

public class AttendanceFragment : Fragment 
{ 
    private static ListView listView; 
    private static ProgressBar progress; 
    private static List<DA_ClassSectionAttendance> dataList=new List<DA_ClassSectionAttendance>(); 

// If i instantiate this variable 'dataList' here 
//it will be persisted even the user logs out I know its declared as static 
// because I am accessing this variable on broadcast receiver. 
// But I want this re-instantiated after user logs out but HOW? 
    private static AttendanceListAdapter attendanceAdapter; 
    private static DA_Attendance daAttendance; 
    public override void OnCreate(Bundle savedInstanceState) 
    { 
     base.OnCreate(savedInstanceState); 

     // dataList = new List<DA_ClassSectionAttendance>(); if I instantiate this variable here everytime this fragment created or restores dataList.Count is zero or null 
     attendanceAdapter = new AttendanceListAdapter(this.Activity, dataList); 
     if((dataList==null || dataList.Count==0)) // pull data from server for the first time when fragment is created but I want this method call when user logs out as well. 
      { 
       GetClassSection(); // this method pulls data from server 

      } 

     //set whether MenuOption show/hide from toolbar 
     HasOptionsMenu = true; 
    } 

谢谢

Answer 1

您可以在片段中的onDestroy释放的变量。如果您需要保存数据，则需要将其保存在数据库中。您可以根据您的要求使用SQLlite或realDB。然后当用户注销时，清除当时的数据库。希望它清除