Hi I just want to update what I said before.
On 7 nov, 10:53, andria <andri...@gmail.com> wrote: > Hi, > > Is UEventObserver only available for the framework? Because when I try > to import this class in my application source code an error is raised. > > I've found that there is a kernel API that enables user-space program > execution from kernel thanks to call_userhelpmode but when I tried > that one it returns an error. The error disappeared I don't know exactly why. The only thing I did is to wrap the am command with a shell script. My problem now is that the am command part of the script seems like never executed unlike other commands as echo which just works fine. > > Thanks, > > Andria > > On 4 nov, 18:27, Durgadoss Ramanathan <r.durgad...@gmail.com> wrote: > > > > > > > > > Hi Andria, > > > You can Poll from the User Space using "Handlers" as Preetam mentioned. > > But "Polling" is bad. Instead you can use UEvents. > > > The ideal (Android) way would be: > > > 1. Let your kernel module send an UEvent, whenever the alert raises. > > This can be done by KOBJ_UEVENT(,,.,,) > > 2. Create a Simple Service in UserSpace that has an UEventObserver. > > Register this Observer with your > > KOBJ device path name. > > You can have a look at > > android<http://www.google.com/codesearch#cZwlSNS7aEw/> > > /frameworks > > <http://www.google.com/codesearch#cZwlSNS7aEw/frameworks/>/base<http://www.google.com/codesearch#cZwlSNS7aEw/frameworks/base/&exact_p...> > > /services<http://www.google.com/codesearch#cZwlSNS7aEw/frameworks/base/services...> > > /java<http://www.google.com/codesearch#cZwlSNS7aEw/frameworks/base/services...> > > /com<http://www.google.com/codesearch#cZwlSNS7aEw/frameworks/base/services...> > > /android<http://www.google.com/codesearch#cZwlSNS7aEw/frameworks/base/services...> > > /server<http://www.google.com/codesearch#cZwlSNS7aEw/frameworks/base/services...>/BatteryService.java > > to figure out how to use UEventObservers. > > > 3. Whenever you send the UEvent, this Observer will be called by the > > Android Framework. Inside the observer > > code, you can broadCast an Intent to notify other Services/Apps, that can > > raise a 'notification' or 'Toasts' or > > 'Alerts'. > > > Thanks, > > Durga > > > On Thu, Nov 3, 2011 at 10:04 PM, preetam m.n <preeta...@gmail.com> wrote: > > > as said below create a sysfs entries for the aleart. > > > > 1. for checking for the alert (it could be something like toggling the > > > switch- saying true or 1 when you have a message and false or 0 when no > > > message). > > > 2. for message > > > > create a handler in the android stack to watch 1st sysfs entry to check > > > for the aleart. > > > create a intent observer which pops alert on the lcd. make sure the system > > > by default registers for this intent. > > > when a alert from kernel is given, you handler should be able to recognize > > > it by realizing that the switch is toggled from false to true using cat > > > the > > > 2nd sysfs entry you can get the message content. > > > immediately broadcast an intent to the registered observers and from there > > > your observer should be able to pop and alert message on lcd. > > > > if you not keen of knowing the message from the kernel you can go ahead > > > and create only one sysfs entry and use the same logic. > > > > - Preetam > > > > On Tue, Nov 1, 2011 at 8:11 PM, Tiago Maluta > > > <tiago.mal...@gmail.com>wrote: > > > >> you can create a file [1] as a sysfs entry on your system, create a > > >> android service pooling that information and display to user. > > > >> [1] example: you can create a "notifications" file and put printk > > >> content. > > > >> $ cat /sys/kernel/notifications > > >> YOUR MESSAGE > > > >> --tm > > > >> On Fri, Oct 28, 2011 at 11:05 AM, andria <andri...@gmail.com> wrote: > > >> > Hi, > > > >> > I work on a kernel module that sometimes raises an alert thanks to > > >> > printk. I want to improve it by raising the alert in the user space > > >> > like a notification in the status bar. Does anyone know how this can > > >> > be done? One way to do it is to do like the sms notification because > > >> > as far as I know there is something related to sms an call at kernel > > >> > level but I don't know here exactly. So any idea? > > > >> > Thanks, > > > >> > Andria > > > >> -- > > >> unsubscribe: android-kernel+unsubscr...@googlegroups.com > > >> website:http://groups.google.com/group/android-kernel > > > > -- > > > "The great pleasure in life is doing what people say you cannot do" > > > > -- > > > unsubscribe: android-kernel+unsubscr...@googlegroups.com > > > website:http://groups.google.com/group/android-kernel > > > -- > > Regards > > Durgadoss -- unsubscribe: android-kernel+unsubscr...@googlegroups.com website: http://groups.google.com/group/android-kernel
