Android Question Background task

[Laurie]

I'm struggling to create a background task using Tracker as a guide. I have a simple music player that we like but of course it stops when the screen goes off.

Where should my Process Globals/Globals and all subs go?
Particularly what happens to what was Activity_Create ?

 

[Erel]

You are referring to this example: Background location tracking
right?

MediaPlayer should be a process global variable of the background service and should be handled from that service.

 

[Laurie]

Thanks Erel,

So,I replace the Tracker module with my MediaPlayer module and set Process_Globals in that module to 'Player as Boolean', where Player is the sub that was Activity_Create ??

Sorry if I'm being thick, but this still seems quite complicated to my very limited experience.

 

[Erel]

No.

See the attached example.

Unlike in the location tracking example, here the service is not started at boot and is not scheduled to start if it is killed.

 

[Laurie]

Many thanks for responding Erel.

I get an error message from the manifest file
File not found: NetworkClearText.b4x_excluded

If I comment that line out the app compiles and runs - but keeps on stopping.

My version of b4x is 8.5 - if that is relevant...

 

[Erel]

My version of b4x is 8.5 - if that is relevant...

Yes, it was added in B4A v9.0.

but keeps on stopping

What does it mean?

 

[Laurie]

'It keeps on stopping' - that was the message, nothing more.
Is my b4a 8.5 unable to achieve what I wanted?

 

[Erel]

You should check the logs and find the error message.

The clear text issue is probably not related to this crash. You can search the forum and find alternatives to this macro.

 

[Laurie]

Thanks Erel, I commented out the 'CreateResourceFromFile(Macro, Core.NetworkClearText)' line in the manifest editor and downloaded to a different cellphone (galaxy S6). On opening the app the following error was logged.

Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'int java.lang.Integer.intValue()' on a null object reference
at anywheresoftware.b4a.objects.drawable.ColorDrawable.build(ColorDrawable.java:65)

However, the app worked, so thank you very much for your help.
How important is the NetworkClearText statement?

 

[Erel]

You cannot make non-ssl requests on Android 9+ devices without it.
This was required in my example.

 

[Laurie]

Is my only option to upgrade b4a to solve this problem?

 

[Erel]

The clear text communication has nothing to do with your original question about background playback. It was just needed in my example as I've used a non-ssl stream. Please start a new thread for further discussion about clear text communication.

 

[kisoft]

I know this is an old thread ... How to turn off playback when a user uses Recent Button and removes the application from memory.

 

[Robert Zmrzli]

Eriel, your BackgroundPlay project from post #5 stops playing few seconds after screen is turned off.