I want to update an ImageView on a desktop widget. How can i proceed. (I follow your tutorial and it works fine, but i’m unable to change my ImageView on upate)

Thanks for the tutorial. It helped me a lot. However, i still have questions when it comes to ui and listeners:

1. How can i add at least 3 button with different listeners for each.
2. I tried adding a seekbar and the “desktop widget” displayed “Problem loading widget”.

Hope you can help me with these. Many thanks. :)

concerning the battery life, here’s what my tests tell me so far:
It seems, that the class derived from AppWidgetProvider is instantiated on every onUpdate call (which is called every ‘updatePerdiodMillis’) while my Task thread is hold in memory.
I tested that with some class variables. I created a private String test = “g” and did a test += “g” into the onUpdate method. My displayed String had the maximum of 2 times “g” (gg) while doing the same with a String test2 = “i” in my MyTime-class, I get a new “i” displayed to my widget every second my task is rerun.

I assume, that instantiating a new class every second compared to using an existing class in memory will eat up more battery. On the other hand, we might get the memory space problem when running a lot of widgets that store their stuff in memory which could be the point in this case
… is there any android core developer out there who can give us a statement about that?

For the time widget, why do you say the “service way” would eat more battery life (vs the “java way”)?