android - Is there any way to force audio through the speakers when headphones are plugged in?

Question

I've tried the recommended

setSpeakerphoneOn(true) 

and the unrecommended

AudioSystem.setForceUse(AudioSystem.FOR_MEDIA, AudioSystem.FORCE_SPEAKER);

but neither has worked.

I've tried

setWiredHeadsetOn(false)

but that doesn't work either, and is deprecated.

Interestingly,

isSpeakerphoneOn()

reports true, as does

isWiredHeadsetOn()

Additionally, the following permission is set

<uses-permission android:name="android.permission.MODIFY_AUDIO_SETTINGS" />

Answer 1

The answer turned out to be the following, with tips from Android - Getting audio to play through earpiece

audioManager.setMode(AudioManager.MODE_IN_CALL);
audioManager.setSpeakerphoneOn(true);

Ignore setRouting, it does nothing in APK > 10. Ignore comments about setMode. Ignore comments about setWiredHeadsetOn. Make sure you have MODIFY_AUDIO permissions.