Android Question How to kill all activities in the app?

Beja · Mar 4, 2015

The tech advice is to let the OS kill them at its own convenience! but the problem is when I run the same app again,
it started from where it last closed, not from Main activity. and there's a lot of data in memory too.

achtrade · Apr 22, 2015

I have this in my main activity

B4X:

Sub btnExit
   Activity.Finish
   ExitApplication 
End sub

but the device re-open my app and I don't want that, I need to finish it from cache and everywhere, It has to be reopen only by the user

RandomCoder · Apr 23, 2015

I'm guessing that maybe you are using a service set to startat? If this is the case then you also need to cancel it otherwise it will still run at the predefined time.

achtrade · Apr 23, 2015

No, I don't have any service

What else can be ?

Erel · Apr 23, 2015

Use a process global variable as a flag to indicate that the app is quitting. Check the value of this variable in Activity_Resume of all activities.

If it is true then call Activity.Finish.

In the last activity (assuming that you know which activity is the first in the stack) you should call ExitApplication.

JTmartins · Apr 23, 2015

Maybe I'm doing something wrong, but the way I do it, is calling activity.finish before launching the next activity, and I never had any problems, nor global variables lost.

So if I am in activity "ONE" and want to call activity "TWO" I always do

B4X:

Activity.finish
StartActivity ("TWO")

If I am In activity "TWO" and want to call Activity "THREE" I do

B4X:

Activity.finish
StartActivity ("THREE")

If I am in activity Three and want to call Activity one I do

B4X:

Activity.finish
StartActivity ("ONE")

Etc.

If I want to end the application then I do

B4X:

Activity.finish
ExitApplication

As only the currently activity is running then it exits correctly.

As I said, maybe this is wrong, but I have a stress tested app that works this way, and it is working very well

Beja · Apr 24, 2015

Hi,
How do you use a finished activity's process globals' variables in an open activity?

achtrade · Apr 27, 2015

Erel said:
Use a process global variable as a flag to indicate that the app is quitting. Check the value of this variable in Activity_Resume of all activities.

If it is true then call Activity.Finish.

In the last activity (assuming that you know which activity is the first in the stack) you should call ExitApplication.

But what happen if the user is in the main activity (last activity) ? activity_resume isn't fire. This is what I have in the main activity:

B4X:

Sub Process_Globals
        dim blCloseApp=False as boolean
end sub

Sub Activity_Resume
   if blCloseApp then

      ' AGAIN ??????
      Activity.Finish
      ExitApplication 
   end if
end sub

Sub Activity_KeyPress(KeyCode As Int) As Boolean
    If  KeyCode = KeyCodes.KEYCODE_BACK Then
        Dim result As Int
        result = Msgbox2("Close App?", "Exit", "Yes", "", "No", Null)
        If result = DialogResponse.Positive Then  
            blCloseApp=True
            Activity.Finish
            ExitApplication 
        Else
            Return True
        End If
    End If
End Sub

Erel · Apr 27, 2015

Is the main activity the only activity in the stack? If yes then your code should work.

achtrade · Apr 27, 2015

Erel said:
Is the main activity the only activity in the stack? If yes then your code should work.

Yes, but is it ok to put the ExitApplication twice ?

Erel · Apr 28, 2015

As a general rule you should avoid using ExitApplication at all. However if you do want to use it then you can use it any number of times (it will only be called once ).

Android Question How to kill all activities in the app?

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