ERA reports some cases of unhandled exception from Application.Properties.getValue() in onLayout()

I'm getting some ERA reports of an unhandled exception when calling Application.Properties.getValue() from onLayout() - but I've no idea why it could be happening ...

It is happening in both an app and a watchface - and it's always on the very first call to access the properties after starting up.

The property is defined in the properties.xml just like normal:

<property id="pg" type="boolean">false</property>

And is accessed just with a normal call:

var v = Application.Properties.getValue("pg");

It clearly works for most people using the app, but why are there some instances of exceptions being created?

The documentation says these are the possible exceptions:

(Toybox::Lang::UnexpectedTypeException) —

Thrown if key is of type null, Array, or Dictionary

(Toybox::Application::Properties::InvalidKeyException) —

Thrown if key does not exist in Application Settings

Is there some other exception possible here?

Any suggestions for how I could debug this?

VAW.BE over 3 years ago in reply to jim_m_58

It's indeed a property with no settings. I'm using them to define devices that are OLED, or has no floors, or if they are square or round,... So I define those properties based on jungle files etc. Using a try/ catch is an option, but then it results in other errors are weird layouts because I actually need the correct device information.

Is there a better way for doing this?

If I understand correctly, properties should only be used for actual settings?

Michael over 3 years ago in reply to VAW.BE

Just to show you an alternative way to handle device specific source code and definitions:

What I do to define device specific constant data is following:

fenix7x.sourcePath = $(srcBase);../../shared/src-devices/fenix7x
fenix7x.resourcePath=$(resBase)
fenix6xpro.sourcePath = $(srcBase);../../shared/src-devices/fenix6xpro
fenix6xpro.resourcePath=$(resBase)
enduro.sourcePath = $(srcBase);../../shared/src-devices/enduro
enduro.resourcePath=$(resBase)

// ...

And then I have a DeviceInfo.mc file for each device like e.g. following:

class DeviceInfo {

    static const MODEL = 10 /* fenix6xpro */;
    static const DEVICE_NAME = "Fenix 6X";
    static const SIZE = [280, 280];
    static const HEIGHT_FONT_OVERLAY = 8;

    static const SUPPORTS_PARTIAL = true;
	static const HIGH_MEMORY = false;
	
	// ...
}

VAW.BE over 3 years ago in reply to Michael

Well that's a very good alternative. I honestly did not now about the option for sourcepath. Very interesting!