Android Question Homescreen widgets and Receivers in version 12.2

[Cebuvi]

Hello,

I have upgraded B4A to version 12.2 and found that the homescreen widgets now work with Receivers.
I have studied the example in the post https://www.b4x.com/android/forum/threads/android-home-screen-widgets-tutorial-part-i.10166/#content and I understand that to update my app I have to follow the following steps:

- create a Receiver Module.
- include in it all the code that was in my old widget service keeping the structure of the new module.

Is this correct?

Thank you.

 

[Erel]

Yes

 

[Cebuvi]

The code in the old widget is in the Sub Service_Start and Sub Service_Destroy, where should I add it now?

 

[Erel]

Service_Start -> Receiver_Receive

There is no equivalent "destroy" method.

 

[Alessandro71]

since we can't assume Starter is running, all global data that usually is declared in it, should also be ported to the Receiver module, I think.
For example a SQLite database, should be opened, read and closed within the Receiver module?

 

[Erel]

True.

It doesn't mean that you need to duplicate code. You can implement it in a class and make an instance in the receiver class and in one of the B4XPages.

 

[Alessandro71]

True.

It doesn't mean that you need to duplicate code. You can implement it in a class and make an instance in the receiver class and in one of the B4XPages.

Since tapping the widget also opens the main app, there’s a chance that the widget will update while the app is in foreground.
this means the database object will be instantiated 2 times and the database file opened 2 times: since it was stated that the Database object should be a global, single one to guarantee concurrency, this is giving me headaches…

 

[Erel]

Make it a process global variable and check whether it was already initialized or not.