Android reflection between 2 classes

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Android

I need to know if reflection in android can affect the outside class (class A)
lets say i have class A
which have a method setData:

public void setData(int id){
    editText1.setText(id+"");
}

and class B ;
I send A.class as parameter to class B represent by c.

Object obj = c.newInstance();
Method method1 = c.getMethod("setData", new Class[]{Integer.TYPE});
method1.setAccessible(true);
method1.invoke(obj, 3)

this code is working in the inside class(class B) but outside in the original class A like I didn't change anything.

thanks in advance.

What I have tried:

I tried to trace the data send i.e id after invoke the method in class B and print it in both classes it changed in Class B only class A has no effect