What do you mean by "in use"? You can find out whether you are attached to a power source with the "plugged" field (0 means not plugged in / on battery, non-zero is the power source), which is generally what things use to determine whether the device is plugged in (so it is okay to do more power drawing operations).
On Sat, Sep 19, 2009 at 12:42 PM, Walles <[email protected]> wrote: > > Thanks Mark, that was the hint I needed. > > What I really wanted to know was whether or not the battery was > currently in use, and for anybody else following this thread, here's > the method I came up with: > > " > /** > * Is the battery currently discharging? > * > * @return True if our battery is discharging. False otherwise. > */ > private boolean isDischarging() { > // Contact the battery manager > Intent batteryIntent = > registerReceiver(null, new IntentFilter > (Intent.ACTION_BATTERY_CHANGED)); > if (batteryIntent == null) { > Log.w(DrainOMeter.LOGGING_TAG, > "Failed to talk to the battery manager, assuming > we're on battery power"); > return true; > } > > // Ask about battery charging status > int batteryStatus = BatteryManager.BATTERY_STATUS_UNKNOWN; > if (batteryIntent != null) { > batteryStatus = > batteryIntent.getIntExtra("status", > > BatteryManager.BATTERY_STATUS_UNKNOWN); > } > if (batteryStatus == BatteryManager.BATTERY_STATUS_UNKNOWN) { > Log.w(DrainOMeter.LOGGING_TAG, > "Failed to get battery charging status, assuming > we're on battery power"); > return true; > } > > return batteryStatus == > BatteryManager.BATTERY_STATUS_DISCHARGING; > } > " > > Cheers //Johan > > On 18 Sep, 11:54, Mark Murphy <[email protected]> wrote: > > Walles wrote: > > > I want to know if my device is currently charging. > > > > > How do I find that out? I've been looking a bit at the Intents API, > > > but AFAIU I can just subscribe to events from there, and a > > > subscription is not what I'm after. And even if I *did* want updates, > > > I'd still need to know the initial state. > > > > > I just want to ask a one-shot "are we charging" question. How can I > > > do that? > > > > Register for the broadcast Intent with a null receiver. If you get a > > non-null return value, then that return value is an Intent from the last > > "sticky broadcast" matching your supplied IntentFilter. I believe the > > battery updates are such a sticky broadcast. By passing null for the > > receiver, you do not actually register a receiver and so do not need to > > unregister anything later. > > > > For more instructions on this, look up registerReceiver() in the Context > > class (which is a base class for Activity, Service, etc.). > > > > -- > > Mark Murphy (a Commons Guy)http://commonsware.com| > http://twitter.com/commonsguy > > > > _The Busy Coder's Guide to *Advanced* Android Development_ > > Version 1.1 Available! > > > -- Dianne Hackborn Android framework engineer [email protected] Note: please don't send private questions to me, as I don't have time to provide private support, and so won't reply to such e-mails. All such questions should be posted on public forums, where I and others can see and answer them. --~--~---------~--~----~------------~-------~--~----~ 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 -~----------~----~----~----~------~----~------~--~---
