How to use hide method in Android?

I'm new in Android.My phone has two SIM slot,And i want to know secomd SIM card's info.So I want to sue the blowe method in TelephonyManager which is hided.

Someone tells me to use reflect,and here is my try.

            Class<TelephonyManager> telephonyManagerClass = TelephonyManager.class;
            TelephonyManager telephonyManager = (TelephonyManager) getSystemService(Context.TELEPHONY_SERVICE);
            try {
                Method method = telephonyManagerClass.getMethod("getSimState", new Class[]{int.class});
                method.setAccessible(true);
                Object object = method.invoke(telephonyManager,1);
                int a = (int)object;
                System.out.println(a);
            } catch (NoSuchMethodException e) {
                e.printStackTrace();
            }catch (Exception e){
                e.printStackTrace();
            }

Unfortunatly, here is exception

 java.lang.NoSuchMethodException: getSimState [int]
 at java.lang.Class.getConstructorOrMethod(Class.java:472)
 at java.lang.Class.getMethod(Class.java:857)
 at (MainActivity.java:61)
 at android.view.View.performClick(View.java:4438)
 at android.view.View$PerformClick.run(View.java:18442)
 at android.os.Handler.handleCallback(Handler.java:733)
 at android.os.Handler.dispatchMessage(Handler.java:95)
 at android.os.Looper.loop(Looper.java:136)
 at android.app.ActivityThread.main(ActivityThread.java:5195)
 at java.lang.reflect.Method.invokeNative(Native Method)
 at java.lang.reflect.Method.invoke(Method.java:515)
 at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:787)
 at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:603)
 at dalvik.system.NativeStart.main(Native Method)

Could you help me to fix it?