[android-developers] Re: Where to put a broadcast receiver for a widget

Okay, figured it out. I guess I can't have anything from the
AppWidgetProvider class activate a registerReceiver so I have to make
a service to do it. I don't keep it running, just launch it to update
everything then it dies.

Thanks for your help and patience.

On Feb 3, 10:56 pm, Jeffrey <jeffisagen...@gmail.com> wrote:
> Also the only thing that changes is the Context, is that where the
> problem is? Because if it's not that then I have absolutely no clue as
> to what it could be.
>
> On Feb 3, 10:45 pm, Jeffrey <jeffisagen...@gmail.com> wrote:
>
>
>
>
>
>
>
> > Am I doing something wrong? The first time my app runs this code it
> > runs it from the Configuration page and it works just fine, the second
> > time it comes up with a nullpointerexception, the code is this:
>
> > IntentFilter batteryLevelFilter = new
> > IntentFilter(Intent.ACTION_BATTERY_CHANGED);
> > rawlevel = registerReceiver(null,
> > batteryLevelFilter).getIntExtra("level", -1);
>
> > I know that registerReceiver doesn't like to run from the
> > AppWidgetProvider, so is it something to do with the class being
> > called by the onUpdate()? I don't know if I need to do anything
> > special but I can't seem to get it to run this line of code to save my
> > life.
>
> > Also as a side note I tried using this
>
> > int rawlevel = intent.getIntExtra(BatteryManager.EXTRA_LEVEL, -1);
>
> > and it can't resolve BatteryManager.EXTRA_LEVEL even after importing
> > BatteryManager and setting the minSDK to 8.
>
> > On Feb 3, 8:30 pm, AndroidDevTime <androiddevd...@gmail.com> wrote:
>
> > > what are the power battery performance implications of maintaining a
> > > service? Will this drain the battery more to keep a service up and
> > > running?  Especially if you bind to the service from the widget to
> > > call service functions?
>
> > > On Feb 3, 3:39 pm, Mark Murphy <mmur...@commonsware.com> wrote:
>
> > > > 2011/2/3 Jeffrey <jeffisagen...@gmail.com>:
>
> > > > > Thank you, one last issue that I'm having, you said to get the battery
> > > > > level to call registerReceiver with a null broadcast receiver, but
> > > > > when I try the following code I get a nullpointerexception:
>
> > > > > int rawlevel = registerReceiver(null,
> > > > > batteryLevelFilter).getIntExtra("level", -1);
>
> > > > > I'm not sure if thats right or not. When I was running a broadcast
> > > > > receiver it grabbed the context and the code was as such:
>
> > > > >  int rawlevel = intent.getIntExtra("level", -1);
>
> > > > > which worked but since I no longer use the broadcast receiver to grab
> > > > > the intent I can't seem to figure out how to get it into a manageable
> > > > > variable.
>
> > > > There are two possibilities:
>
> > > > 1. Your batteryLevelFilter is incorrect
>
> > > > 2. Your code is being called before an ACTION_BATTERY_CHANGED
> > > > broadcast has been sent
>
> > > > Since #2 is conceivable, depending on when you are setting up your
> > > > alarms, be sure to handle a null response to registerReceiver().
>
> > > > Also, I would use BatteryManager.EXTRA_LEVEL instead of "level".
> > > > That's a change I need to make in one of my own examples, one of these
> > > > days...
>
> > > > --
> > > > Mark Murphy (a Commons Guy)http://commonsware.com|http://github.com/commonsguyhttp://commonsware.com/blog|http://twitter.com/commonsguy
>
> > > > Android Training...At Your Office:http://commonsware.com/training

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