How to reflect SubscriptionManager and Telephonymanager get their methods

        Mtelephonymanager = (Telephonymanager) context.getsystemservice (context.telephony_service);
        if (Mtelephonymanager = = null) {
            throw new Error ("telephony manager is null");
        }
       
        Msubscriptionmanager = Subscriptionmanager.from (Mcontext);

For a chestnut, get Subscriptionmanagergetsubid (SlotID) and Telephonymanager's getsimserialnumber (int subId)

    private static int[] getsubid (int slotid) {Method declaredmethod;
        int[] Subarr = null; try {Declaredmethod = Class.forName ("Android.telephony.SubscriptionManager"). Getdeclaredmethod ("Getsubid", NE
            W Class[]{integer.type});
            Declaredmethod.setaccessible (TRUE);
        Subarr = (int[]) Declaredmethod.invoke (Msubscriptionmanager, SlotID);
            } catch (ClassNotFoundException e) {e.printstacktrace ();
        Declaredmethod = null;
            } catch (IllegalArgumentException E2) {e2.printstacktrace ();
        Declaredmethod = null;
            } catch (Nosuchmethodexception E3) {e3.printstacktrace ();
        Declaredmethod = null;
            } catch (ClassCastException e4) {e4.printstacktrace ();
        Declaredmethod = null;
            } catch (Illegalaccessexception e5) {e5.printstacktrace ();
        Declaredmethod = null; } catch (InvocationtargetexcEption e6) {e6.printstacktrace ();
        Declaredmethod = null;
        } if (Declaredmethod = = null) {Subarr = null;
        } mlog.d ("getsubid =" + subarr[0]);
    return Subarr;
        } private String Getsimserialnumber (int subId) {method method;
        String status = NULL;
            try {method = Mtelephonymanager.getclass (). GetMethod ("Getsimserialnumber", Int.class);
            Method.setaccessible (TRUE);
        Status = String.valueof (Method.invoke (Mtelephonymanager, subId));
        } catch (Nosuchmethodexception e) {e.printstacktrace ();
        } catch (Illegalaccessexception e) {e.printstacktrace ();
        } catch (IllegalArgumentException e) {e.printstacktrace ();
        } catch (InvocationTargetException e) {e.printstacktrace ();
        } mlog.d ("Getsimserialnumber =" + status);
    return status; }