我试图用这个Android类找出反射:Classc=Class.forName("com.android.internal.widget.LockPatternUtils");Methodmethod=c.getDeclaredMethod("getKeyguardStoredPasswordQuality");method.setAccessible(true);Objectobject=method.invoke(c);//Errorwiththislineresult=object.toString());getKeyguardStoredPasswordQuality方法声明为