page-reference-listview-or-record.java

public void method(){
      try {
          // do stuff
          return redirectUser(true); 
      } catch (Exception e) {
          return redirectUser(false);
      }
  }
    
public PageReference redirectUser(Boolean success){   
    PageReference pageRef;
    String woListViewId 	= '00B8c00000BrguBEAR';
    String oppsListViewId 	= '00B8c00000Brgr2EAB';

    if(success){
        if(workOrdersToInsert.size() > 0){  // All Work Orders
            pageRef = new PageReference('/lightning/o/WorkOrder/list?filterName='+ woListViewId);

        } else {  // Single Work Order
            pageRef = new PageReference('/'+ workOrdersToInsert[0].id);

        }
    } else {
        if(selectedOpps.size() > 0){  // return to All Opportunities
            pageRef = new PageReference('/lightning/o/Opportunity/list?filterName='+ oppsListViewId);

        } else {  // Single opportunity
            pageRef = new PageReference('/'+ selectedOpps[0].id);
        }            
    }

    pageRef.setRedirect(true);
    return pageRef;
}