java - Access Variable from the same Class but different method - Android Eclipse - App -

i face problem cannot access directory variable main method in eclipse. here snippet of code:

public class mainscreen extends activity {      public void main(string [] args) {          button import = (button)findviewbyid(r.id.importcontactbutton);          uri sdlocation = uri.parse(environment.getexternalstoragedirectory().getabsolutepath());         string path = "/scanner/data/";         file directory = new file(sdlocation + path);     }      protected void cameraactivity() {          uri outputfileuri = uri.fromfile(directory);         intent intent = new intent(android.provider.mediastore.action_image_capture );         intent.putextra( mediastore.extra_output, outputfileuri );         startactivityforresult( intent, 0 );      } } 

i'm not sure wether because i'm using wrong access modifiers on classes, or right access control modifiers on classes. tried many methods access variable none working, doing wrong??? appreciated.

thank :)

you out of scope, directory valid until end of method 'main'. should make class variable.

also, main method on android project pretty useless (unless test purposes). code not run application, , can run on console java application.