Android :: Development-cannot Download An Image Outside Of OnCreate

I am trying to develop an android application that shows the user the location of atms,hotels etc on a google map....i havent started working on the gps yet.as of now the app works something like this....first of all a map loads on which i intend to show the users current location......on clicking on the menu button there are 3 options.....

-services
-about us
-quit
on selecting services option the following options are available......
-atm
-hospital
-hotel
etc
on selecting the atm option we will be shown a screen displaying some text........
on using the menu for this screen we get the following menu items.....
-sbi
-canara
-hdfc
-icici
etc

My intention is that when the user selects the sbi option a map should load showing the various places where there are sbi atms near where the user is currently............i started out with the google map api but i had to quit because when i select one of the menu options,such as "sbi",the map doesnt load......instead i am getting the error "application failed to load"...basically i was trying to load a map activity from my first map activity......after googling a bit without any results i tried another approach.......i tried to download and view the static map of the location i wanted..it worked.......but when i tried to download
the static map when i select an option like before i get the same error..."application failed to load"...then i tried downloading 2 images from inside onCreate....that worked.......i cannot do the same thing outside the onCreate.....for eg.inside the function for the selected option...