Android Question Always open last activity

[ducphu]

Hi all,

My app has a few activities. Let say I open a child activity then press Home button to close the app, when I re-open the app, I always see my last opened activity, even if I purposely kill the app to get rid of it from the memory. What should be the problem here?

 

[parijs]

Do you have closed the activity before you went to main?

 

[ducphu]

Which activity? I didn't close any activity. If my last opened activity is a child activity, every time I open the app I will see that child activity. Even I kill the process, it doesn't open my main activity as it should be, but it still load that child activity.

 

[klaus]

Can you post a small project showing the problem.

 

[ducphu]

Hi klaus,

It's difficult. My app is a large project and if I don't know where the problem is. If I make a simple project, I'm unable to generate the problem.
Anyway, I notice that, if I force stop the app, it will load back my main activity. Does it make any clue?

 

[ducphu]

Below is the log:
** Activity (main) Create, isFirst = true **
** Activity (main) Resume **
** Service (update) Create **
** Service (update) Start **
** Activity (main) Pause, UserClosed = false **
** Activity (activity2) Create, isFirst = true **
** Activity (activity2) Resume **
** Activity (activity2) Pause, UserClosed = false ** 'Close App by pressing Home button

' Manually kill the process, then open app again

** Activity (activity2) Create, isFirst = true **
** Activity (activity2) Resume **
** Activity (activity2) Pause, UserClosed = false **

 

[ducphu]

Hi klaus,

I just use the Two Activities example (https://www.b4x.com/android/forum/threads/two-activities-example.6611) to test and it happens exactly the same as my app. the log is:

** Activity (main) Create, isFirst = true **
** Activity (main) Resume **
** Activity (main) Pause, UserClosed = false **
** Activity (activity2) Create, isFirst = true **
** Activity (activity2) Resume **
** Activity (activity2) Pause, UserClosed = false **
' Manually kill the process, then open app again
** Activity (activity2) Create, isFirst = true **
** Activity (activity2) Resume **
** Activity (activity2) Pause, UserClosed = false **

I'm confused. So, is this normal??? I tested some apps on the market. If I kill those apps, they will open with the main activity.

 

[klaus]

Do you have
Activity.Finish
in the Activity_Pause routine ?
If no, as long as the application is not killed you'll see the last visible activity.

 

[ducphu]

@klaus I dont use Activity.Finish and yes I know if the app is not killed, it will be opened with last activity. But,my problem is, even I purposely kill the app, it is still opened with the last activity, which I dont want.
@Peter Simpson I dont want to make it complicate. Basically, what I want is, if my app is NOT killed, it is opened with last activity. If my app is killed, it should be opened with main activity. My problem here is, even my app is killed, it is still opened with last activity.

Hope I explained my problem clearly.

 

[klaus]

Without seeing your code it's difficult to help.
How do you kill the the app ?
The small attached example works as expected.

 

[ducphu]

@klaus Weird, to me that example doesn't work as expected.
I kill the app using an app from the market, i.e Watchdog
If that example works for you then maybe Watchdog doesn't really kill the app
Any suggestion how to or which app can be used to "really" kill the app.

P/S I just tested using Watchdog to kill some commercial apps like LINE Tools, Unit Converter.
What I observed is, for LINE Tools, after being killed by Watchdog, it open and show the main activity.
For Unit Converter, after being killed by Watchdog, it open and show the last activity.
uhmm so I think there should be some tricks behind to determine which activity will be showed....

 

[thedesolatesoul]

1. Dont use a process killer. Use 'Recents Menu' and then swipe to kill.
2. How are you re-launching the app?

 

[parijs]

Maybe LINE Tools has only one activity

 

[ducphu]

@thedesolatesoul thx you... if I use recents menu to kill, the app will load back main activity. Interesting, so those process killers don't really kill the process... I'm wondering what those apps do...
@parijs oh yeah maybe...that app has many functions and I didn't think that they put them all in 1 activity....

 

[thedesolatesoul]

@thedesolatesoul thx you... if I use recents menu to kill, the app will load back main activity. Interesting, so those process killers don't really kill the process... I'm wondering what those apps do...

After killing them, were you loading them from the recents menu or from the home screen?

 

[ducphu]

After killing them, were you loading them from the recents menu or from the home screen?

Home screen

 

[ducphu]

May I ask the right way to check if an app is still alive or killed?

 

[susu]

May I ask the right way to check if an app is still alive or killed?

Try in System settings menu / Apps / Running

 

[ducphu]

Apps / Running doesn't seem to be reliable. I test with "Two Activities" example. When the app is not in the running list, both "running services" and "cached processes", the app seems still alive. It still loads the last opened activity.