(06-25-2016, 11:41 AM)dwrae Wrote: It may be useless for you, but on many devices it works fine or people live with it by turning on their device and controlling volume then. It's the drawback of bypassing Android audio. There are some lines of code deep down in Android that check if Android audio is playing, otherwise the volume buttons do not work. What the 'Use volume buttons' option does in the app is try to play a silent audio stream through Android when that option is enabled, but that is not always working.
Don't get offended - it's just extremely annoying (and dangerous) to have to manipulate with the device while driving just to adjust volume. For that reason I have modified bluetooth keyboard acting as a hands-on-wheel media control. Maybe an option to adjust UAPP volume with custom hardware keys? Locked device isn't much of a problem (I can always force staying unlocked) - the real problem is when other app (navigation) is in focus and UAPP plays in background - a lot of finger clicks to adjust volume with eyes on device screen and off the road. If UAPP had some kind of interface to change it's volume from outside, I could gladly write my own service to implement volume control that suits my needs.