Solawe,
so if i repeat your need :
-> 1 complex object has to be stored and retrieved when your app stop/
start
-> This object must be accessible in your program
If I were you I'll do the follwing
-> To store and retrieve your file, use java serialization mechanism.
You'll find a lot of information and tutorial on internet.
-> This class should be the singleton fo a singleton pattern
You should have a méthode getInstance like this:
public class A implements Serializable {
A a = null;
public static A getInstance(){
if (a = null){
1/ first try to deserialize the persistence file
... I let you work here :-)
2/ if the file does not exisits, for the first time for
instance:
a = new A()
}//end if
return a;
}//end method
public save(){
// save your class thanks to serialization in a file
}
}//end class
You'll find infiormation on how to store file in locale application
context here :
http://code.google.com/android/devel/data.html
Every time you need to use your instance call A.getinstance()
Save with A.getinstance().save()
Rgds
C.
On Jul 25, 12:11 pm, solawe <[EMAIL PROTECTED]> wrote:
> Thank you hackbod, Steve Oldmeadow and 6real for your response;
>
> I've a question : can i acess to an object A stored in a Application
> object from a simple class java?
>
> because me i need to store an instance of a class A on starting of my
> android application,later this instance A must be accessed by other
> simple classes java included on my application.
>
> Thanks for your responses.
>
> On 25 juil, 07:47, 6real <[EMAIL PROTECTED]> wrote:
>
> > I don't know exactly what will be your final choice but you maybe
> > should think to implements a Singleton pattern :
>
> >http://radio.weblogs.com/0122027/stories/2003/10/20/implementingTheSi...
>
> > Personnaly I have a class named ConfigurationContext with only static
> > variables that are stored, for persistence with the preferences
> > mechanism (http://code.google.com/android/devel/data/preferences.html)
> > and :
> > in my first activity the class is loaded.
> > Then all is accessed trough static attributs
> > If one attribut is changed, then I saved the preferences.
>
> > I hope it could help you but I only need to store simple object like
> > strings/numbers or boolean.
>
> > C.
>
> > On Jul 25, 3:23 am, Steve Oldmeadow <[EMAIL PROTECTED]> wrote:
>
> > > On Jul 24, 6:33 pm, solawe <[EMAIL PROTECTED]> wrote:
>
> > > > Ok, thanks;
>
> > > > But i dont know when i declare this variable? you think that i must
> > > > declare it on the first activity of my application?
>
> > > You could create an Application object and store it there. Have a
> > > look at android.app.Application. It has an onCreate() that gets
> > > called when the Application is created, before any Activities. If it
> > > is going to be accessed by Services you probably need to think about
> > >threading issues.
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