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原文链接：https://blog.csdn.net/SAPmatinal/article/details/130483382
SAP 使用cl_gui_timer自动刷新屏幕的用法详解
这个类在初始化的时候会设置一个定时间隔，每隔这个时间就会触发一次FINISHED事件。利用这个类的特性，可以实现很多东西，让程序自动化起来
比如定时刷新ALV，但是这个事件不能触发PBO ，此时需要去强制触发PAI，让程序走一次PBO，如果不涉及屏幕字段啥的，只是刷新ALV就不必要了，直接调用REFRESH就行了
正常结果屏幕刷新
*&---------------------------------------------------------------------*
*& Report Y_XB_TEST1
*&---------------------------------------------------------------------*
*&
*&---------------------------------------------------------------------*
REPORT Y_XB_TEST1 NO STANDARD PAGE HEADING.CLASS lcl_event_handler DEFINITION DEFERRED.DATA: go_timer TYPE REF TO cl_gui_timer,go_evt_hndl TYPE REF TO lcl_event_handler,gv_datum TYPE sy-datum,gv_uzeit TYPE sy-uzeit.*&---------------------------------------------------------------------**& START-OF-SELECTION*&---------------------------------------------------------------------*START-OF-SELECTION.gv_datum = sy-datum.gv_uzeit = sy-uzeit.PERFORM list_output.PERFORM init_timer.*&---------------------------------------------------------------------**& USER-COMMAND*&---------------------------------------------------------------------*AT USER-COMMAND.IF sy-ucomm = 'RFSH'.sy-lsind = sy-lsind - 1.PERFORM list_output.ENDIF.*&---------------------------------------------------------------------**& CLASS lcl_event_handler DEFINITION*&---------------------------------------------------------------------*CLASS lcl_event_handler DEFINITION.PUBLIC SECTION.METHODS:handle_timer FOR EVENT finished OF cl_gui_timer.ENDCLASS. "lcl_event_handler DEFINITION
*&---------------------------------------------------------------------*
*& CLASS lcl_event_handler IMPLEMENTATION
*&---------------------------------------------------------------------*
CLASS lcl_event_handler IMPLEMENTATION.METHOD handle_timer.CALL METHOD cl_gui_cfw=>set_new_ok_codeEXPORTINGnew_code = 'RFSH'.CALL METHOD go_timer->run "必须重新激活定时器EXCEPTIONSOTHERS = 9.ENDMETHOD. "handle_timer
ENDCLASS. "lcl_event_handler IMPLEMENTATION*&---------------------------------------------------------------------**& Form INIT_TIMER*&---------------------------------------------------------------------*FORM init_timer.CHECK go_timer IS INITIAL.CREATE OBJECT go_timerEXCEPTIONSOTHERS = 9.CREATE OBJECT go_evt_hndl.SET HANDLER go_evt_hndl->handle_timer FOR go_timer.go_timer->interval = 5. "设置间隔为10秒CALL METHOD go_timer->run "激活定时器EXCEPTIONSOTHERS = 9.ENDFORM. " INIT_TIMER
*&---------------------------------------------------------------------*
*& Form LIST_OUTPUT
*&---------------------------------------------------------------------*
*& text
*&---------------------------------------------------------------------*
*& --> p1 text
*& <-- p2 text
*&---------------------------------------------------------------------*
FORM list_output .DATA: datediff TYPE p,timediff TYPE p DECIMALS 2.datediff = sy-datum - gv_datum.timediff = ( sy-uzeit - gv_uzeit ) / 60.WRITE: /5 '本次开始时间：' ,AT 30 gv_datum , AT 45 gv_uzeit.WRITE: /5 '本次运行时长：' ,AT 30 datediff LEFT-JUSTIFIED,AT 38 '天' ,at 45 timediff LEFT-JUSTIFIED ,AT 51 '分'.
ENDFORM.
layout CALL SCREEN 屏幕刷新
DATA GO_TIMER TYPE REF TO CL_GUI_TIMER .
DATA: GV_INDEX TYPE N LENGTH 2 ,GV_TMP TYPE N LENGTH 2 ,GV_OKCODE TYPE SY-UCOMM .DATA: HH TYPE C LENGTH 2 , "记录时分秒FF TYPE C LENGTH 2 ,MM TYPE C LENGTH 2 .
CLASS LCL_EVENT_HANDLER DEFINITION.PUBLIC SECTION.METHODS:HANDLE_TIMER FOR EVENT FINISHED OF CL_GUI_TIMER.
ENDCLASS. "lcl_event_handler DEFINITION
*&---------------------------------------------------------------------*
*& CLASS lcl_event_handler IMPLEMENTATION
*&---------------------------------------------------------------------*
CLASS LCL_EVENT_HANDLER IMPLEMENTATION.METHOD HANDLE_TIMER.PERFORM FRM_PROCESS_TIMER.ENDMETHOD. "handle_timer
ENDCLASS. "lcl_event_handler IMPLEMENTATION
DATA GO_EVT_HNDL TYPE REF TO LCL_EVENT_HANDLER .INITIALIZATION .START-OF-SELECTION .CALL SCREEN 0100 .
*&---------------------------------------------------------------------*
*& Form FRM_PROCESS_TIMER
*&---------------------------------------------------------------------*
*& text
*&---------------------------------------------------------------------*
*& --> p1 text
*& <-- p2 text
*&---------------------------------------------------------------------*
FORM FRM_PROCESS_TIMER .CALL METHOD CL_GUI_CFW=>SET_NEW_OK_CODE "强制触发PAIEXPORTINGNEW_CODE = 'RFSH'.CALL METHOD GO_TIMER->RUN "EXCEPTIONSOTHERS = 9.ENDFORM.
*&---------------------------------------------------------------------*
*& Form INIT_TIMER
*&---------------------------------------------------------------------*
*& text
*&---------------------------------------------------------------------*
*& --> p1 text
*& <-- p2 text
*&---------------------------------------------------------------------*
FORM INIT_TIMER .IF GO_TIMER IS INITIAL.CREATE OBJECT GO_TIMEREXCEPTIONSOTHERS = 9.CREATE OBJECT GO_EVT_HNDL.SET HANDLER GO_EVT_HNDL->HANDLE_TIMER FOR GO_TIMER.GO_TIMER->INTERVAL = 1. "设置间隔为1秒CALL METHOD GO_TIMER->RUN "激活定时器EXCEPTIONSOTHERS = 9.ELSE .CALL METHOD GO_TIMER->RUN "重新激活定时器EXCEPTIONSOTHERS = 9.ENDIF .
ENDFORM.
*&---------------------------------------------------------------------*
*& Module STATUS_0100 OUTPUT
*&---------------------------------------------------------------------*
*&
*&---------------------------------------------------------------------*
MODULE STATUS_0100 OUTPUT.SET PF-STATUS 'STATUS_0100'.
* SET TITLEBAR 'xxx'.PERFORM INIT_TIMER .
ENDMODULE.
*&---------------------------------------------------------------------*
*& Module USER_COMMAND_0100 INPUT
*&---------------------------------------------------------------------*
* text
*----------------------------------------------------------------------*
MODULE USER_COMMAND_0100 INPUT.CASE GV_OKCODE.WHEN 'BACK'.LEAVE TO SCREEN 0 .WHEN 'RFSH'.GV_INDEX = GV_INDEX + 1 .CLEAR GV_TMP.GV_TMP = GV_INDEX DIV 3600 . "获取小时HH = GV_TMP .CLEAR GV_TMP .GV_TMP = GV_INDEX DIV 60 . "获取分钟FF = GV_TMP .CLEAR GV_TMP .GV_TMP = GV_INDEX MOD 60 . "获取秒MM = GV_TMP .WHEN OTHERS.ENDCASE.
ENDMODULE.