I think you're confused about how Android picks apps (activities)
to handle various commands (intents) that the user invokes.
Roughly:
* the phone radio kit receives a call
* Android asks, "hey, which app is able to answer calls?"
+ If one app says it can, that app is assumed the default.
+ If more than one app says it can, and one has been marked
as the default, that app is used.
+ If more than one app says it can, and no default is marked,
the user is shown a list of choices.
+ The user can make a choice and use it this time.
+ The user can make a choice and mark it as default for
future situations as well.
* Android uses the chosen app to display a "receive call" UI.
This scenario is not just for receiving calls. It also works
for responding to the Home button, and many many many other
situations in the Android system.
You don't get hooks or callbacks for when applications finish--
even the app itself may not be notified that it's being killed.
You cannot disable this "search for intent handlers" mechanism.
It is at the core of what makes Android... Android.
On Mar 23, 9:58 am, Kacee <[email protected]> wrote:
> Hello All,
>
> I want to change default behavior of one of the in-built application
> like Phone/SMS/etc. I got to search on forums that there is an option
> in
> Settings>Launch By Default > There "Clear defaults"
> The "Clear default" button on right is disabled for both in-built and
> any other downloaded app.
>
> 1) Are there any special settings to disable it from custom(non in-
> built) app?
> 2) If once I change Clear Default using "ClearDefault" app available
> on market , is it possible to set the original default application
> back to "active/defaults" ?
>
> I want to change behavior of app after it is just about to complete.
> Can i get some event/ack that "abc app has finished" so that I can
> start my app after that ?
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