If you are very very careful. It is extremely easy to create a UI where you leave task around that the user can not get back to. For example, if you are launching activities tied to any kind of data URI.
On Wed, Apr 27, 2011 at 5:02 PM, Eric <[email protected]> wrote: > The doc says this: > > > http://developer.android.com/guide/topics/fundamentals/tasks-and-back-stack.html > > "This second ability is important: Users must be able to leave a task > and then come back to it later using this activity launcher. For this > reason, the two launch modes that mark activities as always initiating > a task, "singleTask" and ""singleInstance", should be used only when > the activity has an ACTION_MAIN and a CATEGORY_LAUNCHER filter. > Imagine, for example, what could happen if the filter is missing: An > intent launches a "singleTask" activity, initiating a new task, and > the user spends some time working in that task. The user then presses > the HOME key. The task is now sent to the background and not visible. > Because it is not represented in the application launcher, the user > has no way to return to the task." > > But isn't it true that the user could indeed navigate back to that > 'singleTask' task by simply following the steps they took to get there > in the first place, when they first launched it? There will obviously > not be a launcher icon for this task, but if the user launched > whatever they launched in the first place, and then performed the same > action that started the task in the first occurrence, then the system > should find the existing task and bring it to the foreground correct? > Or does Android destroy tasks that it considers 'orphaned'? > > -- > You received this message because you are subscribed to the Google > Groups "Android Developers" 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-developers?hl=en > -- Dianne Hackborn Android framework engineer [email protected] Note: please don't send private questions to me, as I don't have time to provide private support, and so won't reply to such e-mails. All such questions should be posted on public forums, where I and others can see and answer them. -- You received this message because you are subscribed to the Google Groups "Android Developers" 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-developers?hl=en
