Hi, 1.Thanks for your prompt reply.Why I need to have all the three activities in the stack because I want to avoid the time it takes to create the activity.So that user will not feel smoother screen transition.to explain in a better way suppose that A and B activity has a text view that updates the timer that is updated from a common place.
Only objective is to have a smoother transition. 2.What is the use of "Single Top" activity.If I press back key on a single top activity.Will it be killed? Thanks, Shekhar On Apr 22, 10:30 pm, Mark Murphy <[email protected]> wrote: > Shekhar wrote: > > I have a problem. > > > I have to design an application in which three activities A ,B,C are > > such that if I move across the activities, previous > > activities are not killed.A,B,C should be in the application stack so > > that their OnCreate > > function is not called everytime.Activities should be killed only when > > finish() is called explicitly.What is the solution for it? > > If the user goes from A -> B -> C, then presses the BACK button, C will > be destroyed. If the user presses the BACK button again, B will be > destroyed. > > If the user goes from A -> B, then takes a phone call and meanders away > from your application for a while, A or B may be destroyed to free up > RAM (though you will be able to use onSaveInstanceState() to retain some > knowledge of your current condition). > > None of that is avoidable. All of that is very important for the proper > operation of the users' phones. > > The only way to have the functionality of A, B, and C all exist as a > unit is for it all to *be* a unit -- having a *single* activity do all > three things. > > On the whole, I think Android works better where A, B, and C can work > independently, and so I really recommend you consider why your design > requires those activities to all be in memory at the same time. > > > Also what intent flag I should use to call another activity? > > I do not understand this question, sorry. > > -- > Mark Murphy (a Commons > Guy)http://commonsware.com|http://twitter.com/commonsguy > > Android Training in US: 14-18 June 2010:http://bignerdranch.com > > -- > 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 > athttp://groups.google.com/group/android-developers?hl=en -- 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
