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;
