On Tue, May 26, 2009 at 6:31 PM, zhangxiyuan <zhangzho...@gmail.com> wrote:
> > Hi Dianne, Yi Sun, > > What I want to do is to get the battery status at any time, for > example, I have a button on the screen, any time I click it, I can > view the battery status. > of course, there maybe more functions beyond this. > > Yi Sun, > First of all, thanks a lot. > I used adb shell to check the /sys directory, but there is not a > power_supply sub directory. > Is it because I am using an emulator but not real phone? > Could provide any snippets of poll the battery status? I had a typo, it should be /sys/class/power_supply. For the code, look at com_android_server_BatteryService.cpp. But I think Dianne is right, the sticky broadcast can help you. > > Thanks. > > On May 27, 12:47 am, Dianne Hackborn <hack...@android.com> wrote: > > As I said, I am pretty sure this is a sticky broadcast, meaning that the > > contents of the last broadcast are remembered by the system. > > > > That said, I can't really help you any more without know what you are > > actually trying to do -- are you trying to write a third party app (if so > > android-developers is the appropriate place), are you trying to port to > some > > hardware (if so android-porting), or something else? > > > > > > > > On Tue, May 26, 2009 at 12:29 AM, zhangxiyuan <zhangzho...@gmail.com> > wrote: > > > > > Hi Dianne, > > > Thanks a lot for your help. > > > > > According to the reply from Yi Sun: > > > >>>>Look into the update() method in BatteryService.java. You may be > able > > > to > > > >>>>solve the issue by register for BATTERY_CHANGED. But, it only be > sent > > > >>>>out when the battery status is changed. Not sure if it is good for > you > > > >>>>or not. > > > I checked the source code of com.android.server.BatteryService#update > > > (), yes, the update method first call native_update(), > > > then check for the status, if some status field changed, then > > > sendIntent() will be invoked to broadcast. > > > My question is "does that mean I can not get the battery information > > > in real-time?", I mean if I launch the application at 00:00:00, then > > > return to home screen, > > > then relaunch it at 00:00:30, then maybe none of the status changed, > > > does that mean I can not get any status information? > > > > > Thanks. > > > > > On May 26, 3:16 pm, Dianne Hackborn <hack...@android.com> wrote: > > > > On Mon, May 25, 2009 at 8:12 PM, zhangxiyuan <zhangzho...@gmail.com> > > > wrote: > > > > > And I have three other questions: > > > > > 1. Which apis will be included in the sdk public api? Is there any > > > > > description about it? > > > > > > The official public SDK is only the things described here: > > > > > >http://developer.android.com/reference/packages.html > > > > > > And yes, @hide is used to keep classes and methods out of the SDK. > > > > > > 2. I modified the com.android.settings.BatteryInfo activity to > another > > > > > > > activity, delete all the api invocation to the non-public api, > > > > > I can still get the battery information such as level, scale, ... > > > > > so, I think what I really need to do is just impelement the > > > > > BroadcastReceiver, and registerReceiver in the onCreate or onResume > > > > > methods. > > > > > Is that right? > > > > > > Yes, as I said, most of the information is sent as a sticky > broadcast. > > > > > > > 3. I do not have a real android-based phone, so I just run the > > > > > application on the emulator, I got the following information all > the > > > > > time: > > > > > Battery status: Charging (AC) > > > > > Battery level: 50 > > > > > Battery scale: 100 > > > > > Battery health: Good > > > > > Battery voltage: 0 mV > > > > > Battery temperature: 0.0°C > > > > > Battery technology: Li-ion > > > > > I wonder how can I get different information by changing some > > > > > configurations of the emulator? > > > > > > Sorry can't help with that. > > > > > > -- > > > > Dianne Hackborn > > > > Android framework engineer > > > > hack...@android.com > > > > > > 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. > > > > -- > > Dianne Hackborn > > Android framework engineer > > hack...@android.com > > > > 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-framework" group. To post to this group, send email to android-framework@googlegroups.com To unsubscribe from this group, send email to android-framework+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-framework?hl=en -~----------~----~----~----~------~----~------~--~---
