How i can pass a parameter to an activity that i am creating from other activity?

Question

Hi

i have a main activity that is creating another activity (with googlemap)

i have to pass my googlemaps activity a parameter, but i dont know how

i created a constructor in my googlemaps activity with the parameter but... how i can call that constructor?

i dont know how to do that because i only know one way to call an activity and doesn't uses the constructor:

Intent i = new Intent (prueba1.this, HelloGoogleMaps.class); startActivityForResult(i, 0);