Unusual interval between key down and key up events for back button on Chromecast remote

Rahil_Dhru — Fri, 26 May 2023 09:02:01 GMT

I am an Android developer. Writing this message to report a bug in input handling of Chromecast

Problem statement

-the interval between key down and key up events for back button on Chromecast remote is unusually small.

Steps to reproduce the problem
- Create a hello world application that logs key down and key up events
- Install the application on Chromecast and begin adb logcat
- Short press back button of Chromecast remote and observe the timings
- Short press any dpad button of Chromecast remote and observe the timings

What happened
- For short press of back button, the time delta between down and up event is 10 to 15ms
- For short press of other buttons, the time delta between down and up event is 100 to 200ms

Logcat snippets :

05-23 13:02:36.198 14319 14319 I ***: onKey: KeyEvent { action=ACTION_DOWN, keyCode=KEYCODE_BACK, scanCode=158, metaState=0, flags=0x8, repeatCount=0, eventTime=2002824, downTime=2002824, deviceId=5, source=0x301, displayId=-1 }
05-23 13:02:36.203 14319 14319 I ***: onKey: KeyEvent { action=ACTION_UP, keyCode=KEYCODE_BACK, scanCode=158, metaState=0, flags=0x8, repeatCount=0, eventTime=2002827, downTime=2002824, deviceId=5, source=0x301, displayId=-1 }

05-23 13:02:46.861 14319 14319 I ***: onKey: KeyEvent { action=ACTION_DOWN, keyCode=KEYCODE_DPAD_CENTER, scanCode=353, metaState=0, flags=0x8, repeatCount=0, eventTime=2013485, downTime=2013485, deviceId=5, source=0x301, displayId=-1 }
05-23 13:02:47.061 14319 14319 I ***: onKey: KeyEvent { action=ACTION_UP, keyCode=KEYCODE_DPAD_CENTER, scanCode=353, metaState=0, flags=0x8, repeatCount=0, eventTime=2013685, downTime=2013485, deviceId=5, source=0x301, displayId=-1 }

What you think the correct behavior should be
- 10-15ms delta for back button press is unusual. The delta for back button should have matched other buttons
- The delta is in 100-200 ms range in general for any button presses on gamepad, keyboard, etc.

Is this a security related issue?
No

Build information :
Android 12; Chromecast Build/STTE.221215.004.A1;

Re: Unusual interval between key down and key up events for back button on Chromecast remote

Kimy — Tue, 30 May 2023 21:44:27 GMT

Hi Rahil_Dhru,

Thanks for sharing this information. Our team is working hard to deliver the best experience for our users — we'll take this as feedback. Keep an eye on the Google Nest Community page for any updates.

Please let me know if you have other questions or concerns, as I will be locking this in 24 hours if I don't hear back from you again. Feel free to start a new thread, and we'll be happy to help.

Thanks,

Kimy

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Unusual interval between key down and key up events for back button on Chromecast remote

Re: Unusual interval between key down and key up events for back button on Chromecast remote