ActivityInfo inside an app

Hi guys,

I've just about finished my paramotor flying app, but while this snippet works in the simulator, it crashed the app on the device:

var activityInfo = Act.getActivityInfo(); -< this line crashes

if (activityInfo!=null){
Sys.println("elapsedTime" + activityInfo.elapsedTime);
distanceFlown = activityInfo.elapsedDistance/1000/1.609;
distanceFlownFormatted = distanceFlown.format( "%.01f" );
}

So - have I just got the wrong end of the stick about activities? The docs arn't great, but my the simulator behaviour I assumed that an activity was automatically started when my apps started ?

There seems to be no way of actually starting/creating an activity from within an app ?

Again, I'm probably missing something - but I want to grab the distance travelled in the activity ideally. As I'd be wanting to save the activity at the end of my flight.

any help ?

jim_m_58 over 9 years ago

It's best to include a check for "null" on these values, as that's how they can start out on devices.

IIRC, elapsedDistance that can be null. So something like:

if(activityInfo.elapsedDistance!=null) {
...
}

powerlord over 9 years ago

thanks Jim,

I'd assumed as docs said only the Activity.getActivityInfo method can return null, the others were safe.

But you were right - it was getting a null.

protected now and all working. :-)