我工作的应用程序，我已经使用回收器视图显示数据从Firebase。 当用户注销时，回收器视图中的项目不会被破坏。当其他用户登录时，他/她可以看到以前的用户数据。

当用户按下注销按钮时，我如何清除回收器视图。我试图清除应用程序中的所有数据，但它关闭了应用程序，用户需要重新单击应用程序。

我的适配器类。

public class UserHistoryViewAdapter extends RecyclerView.Adapter<UserHistoryViewAdapter.UserHistoryViewHolder>{
private List<UserHistoryModel> userHistoryModels;
private Dialog UserHistoryPopUp;
private TextView bookingid_pop_up,check_in_date_time_pop_up,room_no, floor_no ,room_type;
private Button close_btn;


public void setUserHistoryModels(List<UserHistoryModel> userHistoryModels) {
    this.userHistoryModels = userHistoryModels;
}

@NonNull
@Override
public UserHistoryViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
    View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.user_history,parent,false);
    UserHistoryPopUp = new Dialog(view.getContext());
    UserHistoryPopUp.setContentView(R.layout.user_history_pop_up);
    bookingid_pop_up = UserHistoryPopUp.findViewById(R.id.BookingId);
    check_in_date_time_pop_up = UserHistoryPopUp.findViewById(R.id.check_in_date_time_pop_up);
    room_no = UserHistoryPopUp.findViewById(R.id.Room_no_pop_up);
    floor_no = UserHistoryPopUp.findViewById(R.id.Floor_no_pop_up);
    room_type = UserHistoryPopUp.findViewById(R.id.Room_Type_pop_up);
    close_btn = UserHistoryPopUp.findViewById(R.id.Close_btn);

    return new UserHistoryViewHolder(view);
}

@Override
public void onBindViewHolder(@NonNull UserHistoryViewHolder holder, final int position) {
    final String bookingid = userHistoryModels.get(position).getBookingId();
    final Timestamp check_in_d_t = userHistoryModels.get(position).getCheck_in_date_time();
    final SimpleDateFormat sdf = new SimpleDateFormat("dd/MM/yy HH:mm:ss");
    holder.bookingid.setText(bookingid);
    holder.showdetails.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            bookingid_pop_up.setText(bookingid);
            check_in_date_time_pop_up.setText(sdf.format(check_in_d_t.toDate()));
            room_no.setText(String.valueOf(userHistoryModels.get(position).getRoomNo()));
            floor_no.setText(String.valueOf(userHistoryModels.get(position).getFloorNo()));
            room_type.setText(userHistoryModels.get(position).getRoomType());
            UserHistoryPopUp.show();
            close_btn.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    UserHistoryPopUp.dismiss();
                }
            });

        }
    });
}

@Override
public int getItemCount() {

    if(userHistoryModels==null){
        return 0;
    }
    else {

    return userHistoryModels.size();}
}

public class UserHistoryViewHolder extends RecyclerView.ViewHolder {
    private TextView bookingid;
    private Button showdetails;


    public UserHistoryViewHolder(@NonNull View itemView) {
        super(itemView);
        bookingid = itemView.findViewById(R.id.Booking_id_textview);
        showdetails = itemView.findViewById(R.id.Show_booking_details);

    }



}

}