Android MediaPlayer to play an audio file no sound on Galaxy Nexus -

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i use mediaplayer playback local audio file.

i need support backward compability android 4.3.

on samsung galaxy nexus 4.3 version. there no sound device speaker. if plugged in earphone, can hear audio sound.

there no such problem android 6.1 , android 7.1.

i call getactivity().setvolumecontrolstream(audiomanager.stream_music); still not work. same device on 4.3, play music palyer, there sound. not device problem. test audiomanager.setstreamvolume(audiomanager.stream_music, audiomanager.getstreammaxvolume(audiomanager.stream_music), 0); still not work.

is there missing do?

i found app on galaxy nexus 4.3, rare speaker not working. event call ring tone front speaker.





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