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I installed NIPPON NDROID 9PRO 9.1Inch Android 10.1(MCU:T3L) Car Multimedia Player and Alpine external speakers in my vehicle. But not able to control volume programmatically.

I used this code to control volume

audioManager.setStreamVolume(AudioManager.STREAM_MUSIC, \_volume, if (showSystemUI) FLAG_SHOW_UI else 0)

But not able to control. Any specific code to control hardware volume?

Sumit
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  • Please clarify your specific problem or provide additional details to highlight exactly what you need. As it's currently written, it's hard to tell exactly what you're asking. – Community Dec 05 '22 at 22:06
  • Google screwed up, no app can control volume on headunits including mine. I only read FCC launcher is able to do it. – Ronen Festinger Jan 13 '23 at 15:25
  • @RonenFestinger I found how FCC launcher is controlling volume, They are using this libTWUtil.so library, I am not able to find this library anywhere They are using android.tw.john.TWUtil package – Sumit Feb 06 '23 at 06:06
  • @Sumit good catch, how did you find it out? Maybe we can contact them? – Ronen Festinger Feb 08 '23 at 05:53

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