Hi Experts,

I need to change the status when i check the checkbox, i need to amend in the code . could you anyone help me

Please call this new field “Defect_on_Hold__c” - checkbox. When checked, the Activity Status(Activity_Status__c) needs to change from "INTrR" to "HOLD". 

trigger tRIIO_Calc_Activity_Status_And_Fields on tRIIO_Activity__c (before update, before insert) {
    //To calculate Reinstatement Status
    if(!Test.isRunningTest())
    if(Trigger.isUpdate){
        Boolean isActivityWithoutOM  = false;
        Boolean isAnyOMWithoutFM = false;
        Boolean doesAnyFMHaveInterimDate = false;
        String Status = ''; 
        Integer countInterimDate = 0;
        for(tRIIO_Reinstatement_FM__c fm:[SELECT Id, Interim_Date__c FROM tRIIO_Reinstatement_FM__c WHERE Activity__c =: trigger.new[0].id]){
            if(fm.Interim_Date__c != null)
                countInterimDate++;
        }
        List<tRIIO_Reinstatement_OM__c> OM = [select id, name,FM__c from tRIIO_Reinstatement_OM__c where Activity__c =: trigger.new[0].id ];
        Boolean isNotWithOutOM = false;
        Boolean isAnyOMWOFM = false;
        Boolean doesNiFMHaveInterimDate = false;
        String NGA_Work_Status_Text = '';
        if (OM.size()==0) {
            isActivityWithoutOM = true;
        } else {   
            //Loop for all OMs and if any OM is without FM then set the flag
            for(tRIIO_Reinstatement_OM__c a : OM) {
                if (a.FM__c!=true) {
                    isAnyOMWithoutFM = true;
                }
           }
           if (countInterimDate > 0) {
               doesAnyFMHaveInterimDate = true;
           } 
        }
        //if there are no Original Measures for Notice set Status to 'Schld'
        if (isActivityWithoutOM == true) {
            Status = 'Schld';
        } else {
            //if any original measures is without a final measures set status to 'InPrg'
            if (IsAnyOMWithoutFM == true) {
                Status = 'InPrg';
            } else {
                //if any final measures have an interim date set status to 'InPrg' else set to 'IntReinst'
                if (DoesAnyFMHaveInterimDate == true) {
                    Status = 'IntrC';
                } else {
                    Status = 'PermC';
                }
            }   
         }
        trigger.new[0].Status__c = Status;
    }
    //To calculate Activity Status
    if(Trigger.isInsert || Trigger.isUpdate){
        String ActivityStatus = '';
        tRIIO_Activity__c [] ActivityNew;
        ActivityNew = trigger.new;
        for( tRIIO_Activity__c Nots : ActivityNew){
            if(Nots.Activity_Status__c != 'IntrR(S)'){
                Nots.Clk_Int_Perm__c = false;
            }
        }
        Profile p = [SELECT Id,Name FROM profile WHERE id=:Userinfo.getProfileId()];
        String currentProfile = p.Name;
        String readOnlyProfiles = 'NG Read-Only';//Add other read-only profiles here seperated by ,
        if (readOnlyProfiles.indexOf(currentProfile) > -1){
            ActivityNew[0].addError('You do not have sufficient privilages to add or modify records.');
        }
        for(tRIIO_Activity__c activity : ActivityNew){
            if ((activity.Activity_Status__c != 'IntrR(S)')&&(activity.Activity_Status__c != 'Cancelled') ) {
                if (activity.Abandoned__c == true){
                    if(activity.Hit_Int_Perm__c == true){
                        ActivityStatus = 'Awaiting Notice';
                    } else{
                        ActivityStatus = 'Abandoned';
                    }
              }
              else{
                  //If Works Close Date AND Registration Date exists AND Reinstatement Status = "Schld" then "Nil Reinstatement"
                  if ((activity.Works_Close__c != null) && (activity.Registration__c != null) && (activity.Status__c == 'Schld'))
                      ActivityStatus = 'Nil Reinstatement';
                  //If Works Close Date AND Registration Date exists AND Reinstatement Status = "PermC" then "PermR"
                  else if ((activity.Works_Close__c != null) && (activity.Registration__c != null) && (activity.Status__c == 'PermC'))
                      ActivityStatus = 'PermR';
                  //If Works Close Date exists AND Registration Date does not exist AND Reinstatement Status = "PermC" then "PermC"     
                  else if ((activity.Works_Close__c != null) && (activity.Registration__c == null) && (activity.Status__c == 'PermC'))
                      ActivityStatus = 'PermC';
                  //If Works Close Date AND Registration Date exists AND Reinstatement Status = "IntrC" then "IntrR" 
                  else if ((activity.Works_Close__c != null) && (activity.Registration__c != null) && (activity.Status__c == 'IntrC'))
                      ActivityStatus = 'IntrR';
                  //If Works Close Date exists AND Registration Date does not exist AND Reinstatement Status = "IntrC" then "IntrC"  
                  else if ((activity.Works_Close__c != null) && (activity.Registration__c == null) && (activity.Status__c == 'IntrC'))
                      ActivityStatus = 'IntrC';
                  //If Actual Start Date exists then "InPrg
                  else if ((activity.Actual_Start__c != null))
                      ActivityStatus = 'InPrg';
                  //If Works Start Date exists then "Notice Raised" 
                  else if ((activity.Works_End_Date__c != null))
                      ActivityStatus = 'Notice Raised';
                  else
                      ActivityStatus = 'Awaiting Notice';                    
               }
               activity.Activity_Status__c = ActivityStatus;
               //If this is a new record then default reinstatement status to 'Schld'
               if(Trigger.isInsert)
                   activity.Status__c = 'Schld';
            }
            //when Reinstatement status changes to a status that is not 'PermC'or 'IntrC'then deattach Activity from closure report
            //so that it can can be added to next batch
            if ((activity.Status__c != 'PermC')&&(activity.Status__c != 'IntrC')){
                activity.Closure_Report__c = null;
            }
            if(Trigger.isInsert){
                Map<Id,Double> mapCounts = tRIIO_QuotationAttachment.ValidateNotice(ActivityNew);
                for(tRIIO_Activity__c activity_Quotation: Trigger.new){                
                    if(activity_Quotation.Works_Order__c != null){
                        if(mapCounts.get(activity_Quotation.Works_Order__c) != null && mapCounts.get(activity_Quotation.Works_Order__c) != 0.0){
                            activity_Quotation.addError('Notice already generated for this Quotation'); 
                        }
                    }
                }
            }    
        }
    }
}