Re: [android-developers] Re: Calling a non-static method in an Activity class from a non-Activity class ?

Wed, 05 Jan 2011 09:55:55 -0800 

Yes, that, too. Thank you.

05.01.2011 20:48, Bob Kerns пишет:

You're forgetting that it facilitates unit testing.

On Jan 5, 1:26 am, Kostya Vasilyev<[email protected]>  wrote:

05.01.2011 2:01, Emre A. Yavuz О©╫О©╫О©╫О©╫О©╫:


Thanks Kostya,
I've actually been aware of using a callback interface reference to
solve this problem, but considering its size and importance (in what
I've been working on)

Size and importance?


I just wanted to find out whether there's a simpler way to do it or not.

A Java interface seems like a pretty simple way to me.

In fact, using interfaces to connect pieces of code provides some
important benefits:

- It reduces coupling between classes, separating behavior and
implementation dependencies;

- It creates a well-defined contract for the class using the interface;

- Provides a way to "call up" in a layered system;

- Related to the above, makes it possible to compile layers as separate
units.

and probably some others that I'm forgetting right now.

-- Kostya










Cheers,
Emre
------------------------------------------------------------------------
Date: Tue, 4 Jan 2011 17:03:53 +0300
Subject: Re: [android-developers] Calling a non-static method in an
Activity class from a non-Activity class ?
From: [email protected]
To: [email protected]
You can override onPause and onResume in your activity and keep track
of its screen time.
Another, cleaner way is to pass a callback interface reference from
your activity to "the other" class instance.
--
Kostya Vasilyev --http://kmansoft.wordpress.com
04.01.2011 16:49 О©╫О©╫О©╫О©╫О©╫О©╫О©╫О©╫О©╫О©╫О©╫О©╫ "Emre A. 
Yavuz"<[email protected]
<mailto:[email protected]>>  О©╫О©╫О©╫О©╫О©╫О©╫О©╫:

Hi,
This question might actually have been brought to developer's

attention here on the list before, yet I wasn't able to find a
solution after a brief search on the net.

I have a method in one of my Activity classes which I would like to

call from a non-Activity class when the Activity class that the method
is a member of is active and running (e.g. in my case the Activity
class that I am refering to is in fact a ListActivity class and thus
it displays a list of items on the screen when it is running) The
problem arises when the non-Activity class, which has a Broadcast
Receiver, needs to call this method to update the list.

Here are my contraints:
- I can't move the method to a static class
- I can make neither the Activity class nor the method just by

itself static

Is there any way to retrieve the "context" for the Activity that is

currently running ? Maybe I am missing a straight forward solution
here. Any suggestions on how to proceed ?

Thanks in advance,
Emre
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