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 <[email protected]> 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 <[email protected]> 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 <[email protected]> wrote: > > > > 2011/2/3 Jeffrey <[email protected]>: > > > > > 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 -- You received this message because you are subscribed to the Google Groups "Android Developers" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/android-developers?hl=en
