Ringer Mode Lock

This application blocks the ringer mode to avoid changing the mode when the phone is locked (screen on)



this is a workaround for the following strange behavior / bug:

Volume rocker usable when the phone is locked, accidental ringtone mode changes under Android 4.2+

https://code.google.com/p/android/issues/detail?id=39828

Note:
 This application blocks only the ringer mode not the volume level.


- Steps to reproduce the problem.
1.Lock the phone, and light the screen with power button.
2.Long press power button until the power off menu appears.
3.Press the power button to close the screen.

- What happened.
4.After that, every time the screen is lighted (but not unlocked), press the volume keys can change the volume though no music is playing at all.

The volume keys keep working each time I turn on the screen without unlocking, and it is back to normal when I unlock the phone use the unlock pattern and lock again.

- What you think the correct behavior should be.
The volume keys should not work at all when the phone is showing lock screen, it has accidentally muted my phone and led to missed calls. This is worse than power off menu it self. Since power off menu only appears with long press, but when ever the menu appears once, the volume keys work every time until I re-lock the phone.

And also I don't think the power off menu should appear by long pressing during locking state, since it is quite possible that the power button can be long pressed even in my pocket during taking the phone in or out.

P.S. When the phone is rebooted and went into lock screen the first time, the volume keys will work on lock screen without the necessity of showing the power-off menu.


- Device
GSM Galaxy Nexus (yakju)
Unrooted Android 4.2.1 (factory image)

Privacy:
I do not collect any personal information with this completely free application.


Keywords:
Jellybean, Samsung Galaxy Nexus, LG Nexus 4, ASUS Nexus 7, Samsung Nexus 10, Volume buttons,Ringer modes