Thanks, Mark. That was helpful. > If you are referring to activities started by one of your activities via > startActivity(), then, yes, the BACK button behaves the same. The BACK > button's job is to destroy the current activity and return control to > the previous activity on the stack.
Is there a way for an (sub-)activity to pass values to the previous activity on the stack (when Back key is pressed) without resorting to persistence storage or static varables in the app? On Sep 11, 5:20 pm, Mark Murphy <[email protected]> wrote: > jason wrote: > > Is there a > > way to trap Back key within an application and prevent/control this > > behavior? > > Implement onKeyDown() in your activity and watch for KeyEvent.KEYCODE_BACK. > > Please bear in mind that your users will get irritated if you make it > difficult for them to navigate your application, so make sure if you > override the BACK button, it is for a good reason, not just because you > do not like the BACK button. > > For example, with the built-in Browser application, the BACK button is > used for going back in the browsing history. While this is fairly > natural, I still get frustrated at times because I try to use the BACK > button to exit the Browser and merely go back a page. When the vast > majority of apps use the BACK button to exit the current activity, it is > sometimes difficult for users to adjust to applications that choose to > handle this differently. > > Or, possibly, I'm just a moron. > > > For sub-activity screens, does the Back key have the same behavior > > (killing the app/activity) or does it go back to the parent activity > > in the stack? > > If you are referring to activities started by one of your activities via > startActivity(), then, yes, the BACK button behaves the same. The BACK > button's job is to destroy the current activity and return control to > the previous activity on the stack. > > -- > Mark Murphy (a Commons > Guy)http://commonsware.com|http://twitter.com/commonsguy > > Android Development Wiki:http://wiki.andmob.org --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Android Beginners" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/android-beginners?hl=en -~----------~----~----~----~------~----~------~--~---
