Android Question Sending message to waiting queue of uninitialized activity (submitjob)

hatzisn · Oct 23, 2020

I do not know if this is generally valid but I've found a solution for this error. If you call a wait for a job in a sub (Number2Sub) which is resumable sub and is called with a wait for then the ball is lost completely. So the answer is do not call wait for in a wait for.

B4X:

Sub Number1Sub
    Wait For (Number2Sub) Complete (Result As boolean)
End Sub

Sub Number2Sub As ResumableSub
    dim hj as HttpJob
    hj.initialize("code1", Me)
    hj.download("http://www.somesite.org")
    
    wait for (hj) JobDone(job As HttpJob)
    If job.success then
        'Never fires
    End If
    Return True
End Sub

agraham · Oct 23, 2020

hatzisn said:
I do not know if this is generally valid

It is certainly not generally valid. You are not correctly calling your HttpJob as a Resumable Sub.

[B4X] Resumable subs that return values (ResumableSub)

Remember that that a call to Sleep or Wait For in a resumable sub causes the code flow to return to the parent. Example: Sub Button1_Click Sum(1, 2) Log("after sum") End Sub Sub Sum(a As Int, b As Int) Sleep(100) 'this will cause the code flow to return to the parent Log(a + b) End Sub...

www.b4x.com

hatzisn · Oct 23, 2020

agraham said:
It is certainly not generally valid. You are not correctly calling your HttpJob as a Resumable Sub.

[B4X] Resumable subs that return values (ResumableSub)

Remember that that a call to Sleep or Wait For in a resumable sub causes the code flow to return to the parent. Example: Sub Button1_Click Sum(1, 2) Log("after sum") End Sub Sub Sum(a As Int, b As Int) Sleep(100) 'this will cause the code flow to return to the parent Log(a + b) End Sub...

www.b4x.com

Hi @agraham. I am not sure I understood what you answered me. Can you please copy my code above and show me what I am doing wrong. I checked the link you posted and I did not find anything relative (with a brief look at least).

agraham · Oct 23, 2020

I've never used HttpJob but all the examples I've seen would have your Wait For line as

B4X:

wait for (hj) JobDone(hj As HttpJob)

but I have to admit that I don't know why. There are still odd corners of Resumable Subs that I don't fully understand.

hatzisn · Oct 23, 2020

I see... I have used it this way a lot of times and it works perfect. Maybe there is not specific need for this and is more of a syntax thing.
When I remove though in Number1Sub the wait for it actually works with no problem.

agraham · Oct 23, 2020

Long shot! - but you could try

B4X:

 hj.initialize("", Me)

or

B4X:

wait for (hj) Code1_JobDone(job As HttpJob)

Erel · Oct 25, 2020

Moved to the questions forum.

Your conclusion is wrong. Based on the message in the title it is related to a paused activity. There isn't enough information here to say what exactly happens. Try to reproduce it in small project.

Best solution, as usual, is to switch to B4XPages and forget from all such issues.

hatzisn · Oct 25, 2020

Erel said:
Moved to the questions forum.

Your conclusion is wrong. Based on the message in the title it is related to a paused activity. There isn't enough information here to say what exactly happens. Try to reproduce it in small project.

Best solution, as usual, is to switch to B4XPages and forget from all such issues.

You are by 95% right. In my Samsung SM-J730F I cannot reproduce it. The error appeared in a client's phone (Xiaomi Mi) and it was solved by removing the Wait For in the loop. The other 5% is that in the client's phone no Activity is destroyed when the code (button1_Click) is called (it has been destroyed and recreated before). I doubt thus a little if this is the cause of this error. I attach a small project and if someone has a Xiaomi Mi and wants to try to reproduce it, any results are highly welcomed.

agraham · Oct 25, 2020

Seems to work fine in release mode on my Xiomi Mi Max 3 with Android 10 and MIUI Global 12.0.1 and also on my Redmi Note 9 Pro with Android 10 and MIUI Global 11.0..6.

It's also fine on a Galaxy A3 with Android 8, a Pixel 4a with Android 11 and a Galaxy Tab A 8 with android 10.

Android Question Sending message to waiting queue of uninitialized activity (submitjob)

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