[android-developers] How can I get the reference to the top (or second top, or any one in the task) activity object

[Linda Li]

 I can only get the package name and class name of the top activity object, 
using activityManager.getRunningTasks.

 

The reason I want to get the reference to the top activity object is:

My application FOOL will start a third-part activity, say Gallery intent 
activity. For example, the activity list is:

A -> B -> C -> D -> Gallery

 

And now during Gallery, I press HOME button.

 

I want to delete all activities, including Gallery, immediately pressing 
HOME button.

 

I can delete the activities who belong to my FOOL package, using an 
activity manager.

But I cannot delete Gallery, since I cannot get its object’s reference.

So when I start FOOL again, I see Gallery! This is not desired at all!

 

Help please? Hint? Link?

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Re: [android-developers] How can I get the reference to the top (or second top, or any one in the task) activity object

[TreKing]

On Mon, Jul 8, 2013 at 8:33 PM, Linda Li wrote:

> So when I start FOOL again, I see Gallery! This is not desired at all!


And why not? If I opened the Gallery via your app, and went home, when I
returned to your app I would expect to still be in the Gallery as this was
the last thing I was doing with your app and this is standard Android
Behavior.

However, if you feel you need to change this, check the Intent flags which
you can use when starting activities. I'm sure some combination of them
will do what you're looking for.

-
TreKing  - Chicago
transit tracking app for Android-powered devices

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Re: [android-developers] How can I get the reference to the top (or second top, or any one in the task) activity object

[Linda Li]

If I use clearTaskOnLaunch of activity A, then the whole procedure can be 
what I want.

However, I do not know all activities are cleared immediately after 
pressing HOME button, or immediately after launching the application.
I just asked the question in "clearTaskOnLaunch behavior ambiguous"

I need to clear all activities immediately after pressing HOME button.
The reason, my application is related to some private data, and the first 
activity actually is login. So security is the top reason.

On Monday, July 8, 2013 9:47:22 PM UTC-5, TreKing wrote:
>
>
> On Mon, Jul 8, 2013 at 8:33 PM, Linda Li 
> > wrote:
>
>> So when I start FOOL again, I see Gallery! This is not desired at all!
>
>
> And why not? If I opened the Gallery via your app, and went home, when I 
> returned to your app I would expect to still be in the Gallery as this was 
> the last thing I was doing with your app and this is standard Android 
> Behavior.
>
> However, if you feel you need to change this, check the Intent flags which 
> you can use when starting activities. I'm sure some combination of them 
> will do what you're looking for.
>
>
> -
> TreKing  - Chicago 
> transit tracking app for Android-powered devices
>  

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Re: [android-developers] How can I get the reference to the top (or second top, or any one in the task) activity object

[TreKing]

On Mon, Jul 8, 2013 at 10:45 PM, Linda Li wrote:

> However, I do not know all activities are cleared immediately after
> pressing HOME button, or immediately after launching the application.


http://developer.android.com/reference/android/content/Intent.html#FLAG_ACTIVITY_CLEAR_WHEN_TASK_RESET

-
TreKing  - Chicago
transit tracking app for Android-powered devices

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Re: [android-developers] How can I get the reference to the top (or second top, or any one in the task) activity object

[Kristopher Micinski]

so call finish in onPause?

Kris

On Mon, Jul 8, 2013 at 11:45 PM, Linda Li  wrote:
> If I use clearTaskOnLaunch of activity A, then the whole procedure can be
> what I want.
>
> However, I do not know all activities are cleared immediately after pressing
> HOME button, or immediately after launching the application.
> I just asked the question in "clearTaskOnLaunch behavior ambiguous"
>
> I need to clear all activities immediately after pressing HOME button.
> The reason, my application is related to some private data, and the first
> activity actually is login. So security is the top reason.
>
> On Monday, July 8, 2013 9:47:22 PM UTC-5, TreKing wrote:
>>
>>
>> On Mon, Jul 8, 2013 at 8:33 PM, Linda Li  wrote:
>>>
>>> So when I start FOOL again, I see Gallery! This is not desired at all!
>>
>>
>> And why not? If I opened the Gallery via your app, and went home, when I
>> returned to your app I would expect to still be in the Gallery as this was
>> the last thing I was doing with your app and this is standard Android
>> Behavior.
>>
>> However, if you feel you need to change this, check the Intent flags which
>> you can use when starting activities. I'm sure some combination of them will
>> do what you're looking for.
>>
>>
>> -
>> TreKing - Chicago transit tracking app for Android-powered devices
>
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Re: [android-developers] How can I get the reference to the top (or second top, or any one in the task) activity object

[Linda Li]

You cannot get the activity ID of the thrid-party activity, such as Gallery.

On Tuesday, July 9, 2013 8:03:57 AM UTC-5, Kristopher Micinski wrote:

> so call finish in onPause? 
>
> Kris 
>
>

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Re: [android-developers] How can I get the reference to the top (or second top, or any one in the task) activity object

[Kristopher Micinski]

It sounds like your design is flawed and completely insecure:  you
really thinking that not showing the user the screen any more --- even
though you're going through another app and handing all the sensitive
information to it --- sounds like a good security policy?

Merely "not showing" the screen sounds like a non solution.

Kris

On Tue, Jul 9, 2013 at 12:39 PM, Linda Li  wrote:
> You cannot get the activity ID of the thrid-party activity, such as Gallery.
>
> On Tuesday, July 9, 2013 8:03:57 AM UTC-5, Kristopher Micinski wrote:
>>
>> so call finish in onPause?
>>
>> Kris
>>
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Re: [android-developers] How can I get the reference to the top (or second top, or any one in the task) activity object

[Linda Li]

I plan to kill all activities in the app, of course. 
 
If all activities in the app are my own, the goal can be easily implemented.
 
However, now we need to call a thrid-party activity, such as Gallery (yes, 
we could design our gallery. Here is an example):
So if the user presses HOME button when he is during Gallery, I still want 
to kill activities in the app, including Gallery.
 
 

On Tuesday, July 9, 2013 11:44:15 AM UTC-5, Kristopher Micinski wrote:

> It sounds like your design is flawed and completely insecure:  you 
> really thinking that not showing the user the screen any more --- even 
> though you're going through another app and handing all the sensitive 
> information to it --- sounds like a good security policy? 
>
> Merely "not showing" the screen sounds like a non solution. 
>
> Kris 
>
> On Tue, Jul 9, 2013 at 12:39 PM, Linda Li 
> > 
> wrote: 
> > You cannot get the activity ID of the thrid-party activity, such as 
> Gallery. 
> > 
> > On Tuesday, July 9, 2013 8:03:57 AM UTC-5, Kristopher Micinski wrote: 
> >> 
> >> so call finish in onPause? 
> >> 
> >> Kris 
> >> 
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> > 
> > 
>

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Re: [android-developers] How can I get the reference to the top (or second top, or any one in the task) activity object

[Kristopher Micinski]

I guess my point is that if you don't control the app, whose to say it
won't steal your data?  Nothing stops it from doing so.  Furthermore,
how are you going to transmit the data so that the gallery app gets it
in a secure way?  The gallery doesn't have any features that allow
encryption or any way to exchange keys.

Kris


On Tue, Jul 9, 2013 at 2:12 PM, Linda Li  wrote:
> I plan to kill all activities in the app, of course.
>
> If all activities in the app are my own, the goal can be easily implemented.
>
> However, now we need to call a thrid-party activity, such as Gallery (yes,
> we could design our gallery. Here is an example):
> So if the user presses HOME button when he is during Gallery, I still want
> to kill activities in the app, including Gallery.
>
>
>
> On Tuesday, July 9, 2013 11:44:15 AM UTC-5, Kristopher Micinski wrote:
>>
>> It sounds like your design is flawed and completely insecure:  you
>> really thinking that not showing the user the screen any more --- even
>> though you're going through another app and handing all the sensitive
>> information to it --- sounds like a good security policy?
>>
>> Merely "not showing" the screen sounds like a non solution.
>>
>> Kris
>>
>> On Tue, Jul 9, 2013 at 12:39 PM, Linda Li  wrote:
>> > You cannot get the activity ID of the thrid-party activity, such as
>> > Gallery.
>> >
>> > On Tuesday, July 9, 2013 8:03:57 AM UTC-5, Kristopher Micinski wrote:
>> >>
>> >> so call finish in onPause?
>> >>
>> >> Kris
>> >>
>> > --
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>> >
>> >
>
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Re: [android-developers] How can I get the reference to the top (or second top, or any one in the task) activity object

[TreKing]

I already provided you a direct link to an Activity flag whose description
seems to match exactly what you want. What's the problem with that?

On Tue, Jul 9, 2013 at 1:12 PM, Linda Li wrote:

> So if the user presses HOME button when he is during Gallery, I still want
> to kill activities in the app, including Gallery.


And if the user uses the recent task list to move to another app, not HOME?
In that case as well?

What difference does it make if the user remains on the Gallery when they
come back to your app or not? How is this any less "secure" than opening
the Gallery app to begin with?

-
TreKing  - Chicago
transit tracking app for Android-powered devices

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Re: [android-developers] How can I get the reference to the top (or second top, or any one in the task) activity object

[Linda Li]

I do not think using default Gallery is not secure. I also use default 
camera intent in the app.
I only need the picture. The picture is not secure: it is in the storage.
So this would not be a problem.

On Tuesday, July 9, 2013 1:39:59 PM UTC-5, Kristopher Micinski wrote:
>
> I guess my point is that if you don't control the app, whose to say it 
> won't steal your data?  Nothing stops it from doing so.  Furthermore, 
> how are you going to transmit the data so that the gallery app gets it 
> in a secure way?  The gallery doesn't have any features that allow 
> encryption or any way to exchange keys. 
>
> Kris 
>
>
> On Tue, Jul 9, 2013 at 2:12 PM, Linda Li > 
> wrote: 
> > I plan to kill all activities in the app, of course. 
> > 
> > If all activities in the app are my own, the goal can be easily 
> implemented. 
> > 
> > However, now we need to call a thrid-party activity, such as Gallery 
> (yes, 
> > we could design our gallery. Here is an example): 
> > So if the user presses HOME button when he is during Gallery, I still 
> want 
> > to kill activities in the app, including Gallery. 
> > 
> > 
> > 
> > On Tuesday, July 9, 2013 11:44:15 AM UTC-5, Kristopher Micinski wrote: 
> >> 
> >> It sounds like your design is flawed and completely insecure:  you 
> >> really thinking that not showing the user the screen any more --- even 
> >> though you're going through another app and handing all the sensitive 
> >> information to it --- sounds like a good security policy? 
> >> 
> >> Merely "not showing" the screen sounds like a non solution. 
> >> 
> >> Kris 
> >> 
> >> On Tue, Jul 9, 2013 at 12:39 PM, Linda Li  
> wrote: 
> >> > You cannot get the activity ID of the thrid-party activity, such as 
> >> > Gallery. 
> >> > 
> >> > On Tuesday, July 9, 2013 8:03:57 AM UTC-5, Kristopher Micinski wrote: 
> >> >> 
> >> >> so call finish in onPause? 
> >> >> 
> >> >> Kris 
> >> >> 
> >> > -- 
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> >> > 
> >> > 
> > 
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Re: [android-developers] How can I get the reference to the top (or second top, or any one in the task) activity object

[Linda Li]

On Tuesday, July 9, 2013 11:30:37 PM UTC-5, TreKing wrote:
>
>
> I already provided you a direct link to an Activity flag whose description 
> seems to match exactly what you want. What's the problem with that?
>

The link you posted is not what I want.
It clear the activities when we relaunch the task.

I want the activities to be killed when pressing the HOME button. There is 
a gap between the two situations.

 

> On Tue, Jul 9, 2013 at 1:12 PM, Linda Li 
> > wrote:
>
>> So if the user presses HOME button when he is during Gallery, I still 
>> want to kill activities in the app, including Gallery.
>
>
> And if the user uses the recent task list to move to another app, not 
> HOME? In that case as well?
>
> What difference does it make if the user remains on the Gallery when they 
> come back to your app or not? How is this any less "secure" than opening 
> the Gallery app to begin with?
>

It is not clean. Actually I can make relaunching the app by starting with 
Login page. However, when we press back, there is Gallery. It is not clean 
at all.


 

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Re: [android-developers] How can I get the reference to the top (or second top, or any one in the task) activity object

[TreKing]

On Wed, Jul 10, 2013 at 11:01 PM, Linda Li wrote:

> It is not clean. Actually I can make relaunching the app by starting with
> Login page. However, when we press back, there is Gallery. It is not clean
> at all.


I have no idea what you mean by it not being "clean".

-
TreKing  - Chicago
transit tracking app for Android-powered devices

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Re: [android-developers] How can I get the reference to the top (or second top, or any one in the task) activity object

[Linda Li]

I mean, when we relaunch the application, the page is Login Page. if we 
press back button, it is Gallery. If we continue pressing back button, it 
goes to HOME.

The whole process seems "not clean" (or "not neat", or "not friendly", or 
"weird") to the user, since we do not expect a Gallery page hidden before a 
Login page.

On Thursday, July 11, 2013 6:06:51 PM UTC-5, TreKing wrote:
>
>
> On Wed, Jul 10, 2013 at 11:01 PM, Linda Li 
> > wrote:
>
>> It is not clean. Actually I can make relaunching the app by starting with 
>> Login page. However, when we press back, there is Gallery. It is not clean 
>> at all.
>
>
> I have no idea what you mean by it not being "clean".
>
>
> -
> TreKing  - Chicago 
> transit tracking app for Android-powered devices
>  

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Re: [android-developers] How can I get the reference to the top (or second top, or any one in the task) activity object

[TreKing]

On Sun, Jul 14, 2013 at 3:15 PM, Linda Li wrote:

> I mean, when we relaunch the application, the page is Login Page. if we
> press back button, it is Gallery. If we continue pressing back button, it
> goes to HOME.


Sounds like your task stack is screwed up. You can make the Gallery be part
of it's own task so the system does not do what you described. Again, look
at the activity flags - I'm sure there's some combination there that will
help you achieve your goal.

-
TreKing  - Chicago
transit tracking app for Android-powered devices

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