Android Question DBRequestManager to many Activities

[cristian petersen]

Hello,

I just started to use B4A 6 days ago. I read too much information here and I am trying to absorb all. I am creating an app with various Activities in each one I need to retreive data from my SQL Server using RDC. My question is: Do I have to declare Dim reqManager As DBRequestManager in Sub Global in every Activity, or just one in Main in Process_globals ? Same question for JobDone, one for each Activity or a unique with all the different tags?

Thank you for your help.

 

[Erel]

No (to all questions). Note that Sub Globals should only be used for UI objects.

You should use a single service to manage all the requests. You can call activities from the service with CallSub or CallSubDelayed. You can use the starter service for this.

 

[cristian petersen]

Thank you. I created a service module and it called from Starter service to maintain the logic separated.

 

[incendio]

No (to all questions). Note that Sub Globals should only be used for UI objects.

You should use a single service to manage all the requests. You can call activities from the service with CallSub or CallSubDelayed. You can use the starter service for this.

What are the benefits to put DBRequest in a single service compared to declared it on each activity?

 

[DonManfred]

less code. Only one place to handle

 

[Erel]

Services are simpler than Activities, especially when long, background tasks are involved. If you use activities then they will be started unexpectedly when the response arrives (because of the usage of CallSubDelayed in HttpJob).