I have a datafield. I am trying to add a background process to download some json file from the web. (I know new devices can do it in the foreground, but I also want it to work for older devices).
So I added (:background) annotation to the class of MyApp:
import Toybox.Application;
import Toybox.Lang;
import Toybox.WatchUi;
(:background)
class MyApp extends Application.AppBase {
hidden var view as MyView?;
function initialize() {
AppBase.initialize();
}
(:typecheck(false))
function getInitialView() as Array<Views or InputDelegates>? {
self.view = new MyView();
return [ self.view ] as Array<Views or InputDelegates>;
}
(:foreground)
function onSettingsChanged() as Void {
if (view != null && !isRunningInBackground()) {
view.onSettingsChanged(SETTINGS_CHANGED_FROM_CONNECT_IQ);
}
}
}
(:no_ciq_2_4_0, :background)
function isRunningInBackground() as Boolean {
try {
var app = getApp();
app.setProperty(PROPERTY_NON_EXSISTANT, 1);
app.deleteProperty(PROPERTY_NON_EXSISTANT);
return false;
} catch (ex) {
return true;
}
}
(:ciq_2_4_0, :background)
function isRunningInBackground() as Boolean {
try {
Properties.setValue(PROPERTY_EXSISTANT, false);
return false;
} catch (ex) {
return true;
}
}
Until now in onSettingsChanged it called view.onSettingsChanged which was always set (IMHO), but now when the background app will run there won't be a view obviously.
The (:foreground) annotation doesn't help, I guess the whole class is in the background code, so if the onSettingsChanged method is overridden then it calls it. I get the following compilation errors. How can I make this compile?
ERROR: fr955: MyApp.mc:68,12: Value 'onSettingsChanged' not available in all function scopes.
ERROR: fr955: MyApp.mc:68,12: Cannot find symbol ':onSettingsChanged' on type 'Null'.
ERROR: fr955: MyApp.mc:68,12: Value 'SETTINGS_CHANGED_FROM_CONNECT_IQ' not available in all function scopes.
The 2nd error is just a bug in the compiler, as it should know that view isn't null, but what can I do if I don't want this code to run at all if the background?
