我使用发射调用系统隐藏的类，为什么不行？没办法创建对象呢？？？求大神们指教啊

ClassLoader classLoader = getClass().getClassLoader();
final Class<?> callManagerClass = classLoader.loadClass("com.android.internal.telephony.CallManager");
Constructor<?> declaredConstructor = callManagerClass.getDeclaredConstructor();
Log.i("TAG", "declaredConstructors===0000===>>>>>");
declaredConstructor.setAccessible(true);
Log.i("TAG", "declaredConstructors====11111==>>>>>"+declaredConstructor);
boolean newInstance = declaredConstructor.isAccessible();
Log.i("TAG", "declaredConstructors======>>>>>"+newInstance);
Object newInstance2 = declaredConstructor.newInstance();
Log.i("TAG", "declaredConstructors==22222====>>>>>");

        到Object newInstance2 = declaredConstructor.newInstance();这一句就不走了，得不到对象。求职大神们指教啊

http://blog.csdn.net/gumanren/article/details/7014283