Parse dev/input/event touch events

Question

I am able to read events from dev/input/event* on a Android phone. However they are row codes in certain sequence like a touch event gives.

How do I parse them into meaningful events like touch at x and y coordinate? Or a long touch etc. And then I want to convert high level events back to similar codes to insert them in event queue.

Does any one have parser code in C/C++?

Any help greatly appreciated.

This is quite device specific. It's not hard to figure out by experiment on a given device, but that information is not necessarily transferable to other makes/models or even other android versions on the same hardware. — Chris Stratton
– Chris Stratton, Commented Apr 12, 2013 at 15:59

Ron · Accepted Answer · 2013-12-05 13:12:26Z

2

u can see struct input_event defined in android kernel source code in external\kernel-headers\original\linux\Input.h

answered Dec 5, 2013 at 13:12

Ron

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Bojan Djurdjevic · Accepted Answer · 2013-05-28 01:59:18Z

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I know this question is old, but here is the answer http://blog.softteco.com/2011/03/android-writing-events-low-level-touch.html

answered May 28, 2013 at 1:59

Bojan Djurdjevic

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2 Comments

michaelb958--GoFundMonica Over a year ago

Please summarise the link in your answer; that way, if the link goes stale the answer won't be completely useless. (BTW, we don't care how long it takes for a question to be answered, as long as the answer's a good one.)

TorukMakto Over a year ago

Bojan - Thanks for attempting to answer. I understand the relevance of each command. You can also get more details from kernel.org/doc/Documentation/input/multi-touch-protocol.txt . Eg: If you draw a circle on screen, it might produce more than 2000 inputs on S3 and sequence of these commands is variating. OS is able to parse them and convert them into high level commands like drag etc... How can we do the equivalent? A good parser would help..

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