[APP]CM/AOKP/AOSP S Pen detection

tushar9989 · May 18, 2013

https://play.google.com/store/apps/details?id=com.tushar.cmspen2
This is an application which allows detection of the S Pen detachment even on AOSP/AOKP/CM based ROMs.
It has only been tested on the Note 2 by me. If it works on your note device please let me know so that I can add it to the list of compatible note devices.

Explanation of how it works:

The android system automatically adds event files for each input device it detects when being installed. These event files are located in /dev/input/eventX where X denotes a particular device. These event files can be read using native C code for which I use an API provided by Radu Motisan which can be found here and also a bit more information about the event files can be found there. So now using this interface I find the event file for the S Pen and then continously read it to see if the value of the S Pen sensor has been changed. Whenever it changes I broadcast the corresponding Intent which was broadcasted by Samsung so that any applications which work based on that Intent can work even on these ROMs without having to change any of their code.

An interesting thing is that this feature is already present in CyanogenMod i.e S-Pen Power saving mode which disables the s pen touch decoder when the s pen is inserted. I fail to understand why they are not doing the same thing that I am doing through my application and save all of us the trouble.

jnr21 · May 19, 2013

Phone vibrates when i inserted/detached s-pen, so it works? I have note2 lte (n7105) with latest rootbox nightly.

Sent from my GT-N7105 using Tapatalk 4 Beta

bungknees · May 19, 2013

tushar9989 said:
https://www.dropbox.com/s/eebkzugsm7ek12s/CM S-Pen Addon.apk

Guys this is the beta version of my application which can detect S Pen detection even on CyanogenMod(works for me on JellyBeer Rom).
Please test it out and tell me if it works on your ROM, it mimics the Intent which is broadcast-ed by Samsung when the S Pen is inserted/detached so any applications which use that intent should work fine.

You can use it in conjunction with my application S Pen Helper to mimic page-buddy on CM 10. Here is the playstore link https://play.google.com/store/apps/details?id=com.tushar.spen_helper

It works well, also Using jellybeer rom. Very good, one thing, how to auto launch a note app? There is the option to launch something, but can't choose what to launch, unless I'm blind.(which could easily be the case)

tushar9989 · May 19, 2013

jnr21 said:
Phone vibrates when i inserted/detached s-pen, so it works? I have note2 lte (n7105) with latest rootbox nightly.

Sent from my GT-N7105 using Tapatalk 4 Beta

If it's vibrating means it's working

bungknees said:
It works well, also Using jellybeer rom. Very good, one thing, how to auto launch a note app? There is the option to launch something, but can't choose what to launch, unless I'm blind.(which could easily be the case)

I had made spen-helper keeping Samsung based ROMs in mind so it selects s note by default but since it's not there on cm10 so it's blank just click below the enable launch toggle will pop up a dialog to change it. I'll fix it in the next version. Also I suggest not to keep the event monitor running in the background as it drains the battery a lot. I'm looking for a method to fix the battery drain currently.

bungknees · May 19, 2013

tushar9989 said:
If it's vibrating means it's working

I had made spen-helper keeping Samsung based ROMs in mind so it selects s note by default but since it's not there on cm10 so it's blank just click below the enable launch toggle will pop up a dialog to change it. I'll fix it in the next version. Also I suggest not to keep the event monitor running in the background as it drains the battery a lot. I'm looking for a method to fix the battery drain currently.

Ok, thanks for the tip. Great work

Edit: just looked at battery now, and holy crap, yes it does drain it. But good start.

tushar9989 · May 21, 2013

Uploaded to play store and source code to GitHub and also a brief explanation on how it works

tushar9989 · May 27, 2013

v0.2.1 out
-Bug fixes and optimizations
-Changed app version to reflect beta status

leonard.pitzu · May 31, 2013

app lauch settings

tushar9989 said:
v0.2.1 out
-Bug fixes and optimizations
-Changed app version to reflect beta status

Can't see the "app launch settings" you've mentioned. Did you remove it? The batery drain is visible but i think it's not catastrophic. I wonder why the CM team never got around implementing this because they already have the building blocks...

tushar9989 · May 31, 2013

leonard.pitzu said:
Can't see the "app launch settings" you've mentioned. Did you remove it? The batery drain is visible but i think it's not catastrophic. I wonder why the CM team never got around implementing this because they already have the building blocks...

The app launch settings are not there in this application. If you want those features you will have to use this application in conjunction with this.
Regarding the battery drain I fixed it in the last version if you are still having battery drain I would suggest increasing the polling value to 1000 which is responsive enough and not at all taxing on the battery

leonard.pitzu · May 31, 2013

tushar9989 said:
The app launch settings are not there in this application. If you want those features you will have to use this application in conjunction with this.
Regarding the battery drain I fixed it in the last version if you are still having battery drain I would suggest increasing the polling value to 1000 which is responsive enough and not at all taxing on the battery

Thanks for the update. I already use the app you've pointed at - just thought your app could do the same (my bad...). On the battery side i disabled you app and the s pen helper leaving me with "stock" CM10.1 + a bunch of play store downloaded apps. The battery drain is still there so the good news is that your app works as expected - that is not causing any dramatic power consumption. The the bad side... the battery drain is caused by something else. I've installed wakelock doctor and am waiting to see which is the app causing the mentioned battery drain (~4%/hour - roughly 4 times more than usual).
Thanks for your quick support!

tushar9989 · May 31, 2013

leonard.pitzu said:
Thanks for the update. I already use the app you've pointed at - just thought your app could do the same (my bad...). On the battery side i disabled you app and the s pen helper leaving me with "stock" CM10.1 + a bunch of play store downloaded apps. The battery drain is still there so the good news is that your app works as expected - that is not causing any dramatic power consumption. The the bad side... the battery drain is caused by something else. I've installed wakelock doctor and am waiting to see which is the app causing the mentioned battery drain (~4%/hour - roughly 4 times more than usual).
Thanks for your quick support!

The battery drain is a problem in most of the CM based ROMs. I use Sentinel ROM which gives much better battery life than any of the other ROMs I tried. Link is in my signature in case you want to try it out.

leonard.pitzu · May 31, 2013

tushar9989 said:
The battery drain is a problem in most of the CM based ROMs. I use Sentinel ROM which gives much better battery life than any of the other ROMs I tried. Link is in my signature in case you want to try it out.

Thanks for pointing out that CM causes battery drain. I've previousely used CM on all my devices (HTC Desire, Nexus S, Galaxy Nexus, Note I & II and Nexus 7) and it turned out to being great. I'll test a bit more and then jump over to Sentinel ROM.

gregsarg · Jun 23, 2013

This is a great application...
Many thanks for this huge step forward !!

AllGamer · Sep 22, 2013

tushar9989 said:
The battery drain is a problem in most of the CM based ROMs. I use Sentinel ROM which gives much better battery life than any of the other ROMs I tried. Link is in my signature in case you want to try it out.

I'm using Notes 1, Google Play will not let me download it.

Could you remove the Google Play restrictions?

or maybe just attach the .APK file here in XDA?

Thanks

tushar9989 · Sep 23, 2013

AllGamer said:
I'm using Notes 1, Google Play will not let me download it.

Could you remove the Google Play restrictions?

or maybe just attach the .APK file here in XDA?

Thanks

Sorry the Note 1 does not have the sensor for detecting the s pen

AllGamer · Sep 23, 2013

tushar9989 said:
Sorry the Note 1 does not have the sensor for detecting the s pen

Thanks for the heads up

bigjl99 · Oct 9, 2013

Issue with the app working reliably on an ASOP ROM

tushar9989 said:
This is an application which allows detection of the S Pen detachment even on AOSP/AOKP/CM based ROMs.
It has only been tested on the Note 2 by me. If it works on your note device please let me know so that I can add it to the list of compatible note devices.
The source code can be found here

The android system automatically adds event files for each input device it detects when being installed. These event files are located in /dev/input/eventX where X denotes a particular device. These event files can be read using native C code for which I use an API provided by Radu Motisan which can be found and also a bit more information about the event files can be found there. So now using this interface I find the event file for the S Pen and then continously read it to see if the value of the S Pen sensor has been changed. Whenever it changes I broadcast the corresponding Intent which was broadcasted by Samsung so that any applications which work based on that Intent can work even on these ROMs without having to change any of their code.

An interesting thing is that this feature is already present in CyanogenMod i.e S-Pen Power saving mode which disables the s pen touch decoder when the s pen is inserted. I fail to understand why they are not doing the same thing that I am doing through my application and save all of us the trouble.

I want to thank you for your hard work on this application, and the level to which you've gone to enable s-pen support in non-touchwiz ROMs. I just made the jump to Carbon ROM (4.3) this weekend after using my Sprint Note 2 (SPH-L900) with rooted, stock 4.1 since I got it at launch last year. I am totally fed-up with touch-wiz and I am really amazed at the difference the ASOP ROM is making for me.

I installed your app and it seemed to work perfectly for about 20 mins or so, then the next time I pulled out my s-pen it didn't recognize the event. Rebooting didn't make a difference, the only thing that made it work again was uninstalling, and then reinstalling the app. I am really confused as to why it stops working. I've checked, and both background services are still active, not cached, and the main program shows as running in my application manager. Do you have any thoughts or suggestions?

I can't paste links into XDA as I don't contribute all that often, but if you want to check out more on Carbon ROM I read about it on galaxynote2root, listed under the recent posts. The ROM is extremely stable and I'm very baffled as to why it isn't cooperating with your app! Thanks!

tushar9989 · Oct 9, 2013

bigjl99 said:
I want to thank you for your hard work on this application, and the level to which you've gone to enable s-pen support in non-touchwiz ROMs. I just made the jump to Carbon ROM (4.3) this weekend after using my Sprint Note 2 (SPH-L900) with rooted, stock 4.1 since I got it at launch last year. I am totally fed-up with touch-wiz and I am really amazed at the difference the ASOP ROM is making for me.

I installed your app and it seemed to work perfectly for about 20 mins or so, then the next time I pulled out my s-pen it didn't recognize the event. Rebooting didn't make a difference, the only thing that made it work again was uninstalling, and then reinstalling the app. I am really confused as to why it stops working. I've checked, and both background services are still active, not cached, and the main program shows as running in my application manager. Do you have any thoughts or suggestions?

I can't paste links into XDA as I don't contribute all that often, but if you want to check out more on Carbon ROM I read about it on galaxynote2root, listed under the recent posts. The ROM is extremely stable and I'm very baffled as to why it isn't cooperating with your app! Thanks!

I think that is happening because you have screen off detection disabled and you are locking the phone before re inserting the s pen. If that happens again you can try inserting the pen then enabling and disabling the detection from the application's settings.

Dwnhiller · Nov 28, 2013

Running unofficial cm11 4.4 Kit Kat and on ART. Any chance of support in the future?

tushar9989 · Nov 28, 2013

Dwnhiller said:
Running unofficial cm11 4.4 Kit Kat and on ART. Any chance of support in the future?

Have you tried using it? Because some users said it works on CM 11.

[APP]CM/AOKP/AOSP S Pen detection

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