In that case I should probably create the array in a persistent store
and load it when required?
On 12/06/2011 11:04 AM, Kostya Vasilyev wrote:
No.
An Activity is just one of the components that make up an application
(package).
http://developer.android.com/guide/topics/fundamentals.html#Components
http://developer.android.com/guide/topics/fundamentals/activities.html
Since you have a receiver for boot_completed, and there is an event
for it, your package is brought into memory and run as a process. This
is needed so you can get BOOT_COMPLETED in your receiver's onReceive.
After this, the process is left in memory as a cache.
But at this time, the user hasn't started any activities, so there
aren't any.
As soon as the the user goes to the application drawer to run your
app, or uses a status bar notification that resolves to an activity,
etc - the approprate activitiy will be 1) constructed 2) initialized
with onCreate 3) go on doing its thing, interacting with the user.
Until then, no.
-- Kostya
2011/6/12 Simon Platten <simonaplat...@googlemail.com
<mailto:simonaplat...@googlemail.com>>
During testing, I have shutdown all processes including the
application before shutting down the phone.
When I power up the phone I can see that the application has been
restarted and is resident, so I should be able to get the activity
shouldn't I?
On 12/06/2011 9:51 AM, Kostya Vasilyev wrote:
There may not be an instance of your activity - definitely not
when we're talking about processing boot_completed.
At that point, the only components involed are a broadcast
receiver and possibly your wakeful intent service (IIRC). Since
the user at that point has never run your application, there
aren't any activities that have been constructed.
So - don't rely on an instance of Activity subclass to initialize
your statics.
You can use a lazy-initializable singleton (mine and many others'
preferred solution) or use an Application subclass and its
onCreate method.
-- Kostya
2011/6/12 Simon Platten <simonaplat...@googlemail.com
<mailto:simonaplat...@googlemail.com>>
Hi,
I've managed to find out why my application wasn't restarting
correctly after a boot up and it was an uninitialised array
that is normally set-up by the main activity when the
application starts.
The question now is....how do I get the main application
activity?
The reason it isn't so straight forward is that I've created
a library which I use in several similar applications, in the
library I have a base activity class which provides core
functionality, in that class I have defined an abstract
method called 'setupArray'.
The name of the derived activity class may be different in
each application. What I would like to do is get a reference
to the application activity from within the library then call
the setupArray method to ensure the array is set-up from the
reboot onReceive method.
Does that make sense?
--
Regards,
Sy
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