android - Check if device has hardware volume controls? -

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some devices kindle fire not have hardware buttons volume, going add on screen controls, don't want have them there if not necessary.

i can't find info on this, i've looked in packagemanager features, plus configuration.

is true maybe devices have hardware volume controls exception of kindle fires?

android.view.keycharactermap.devicehaskey(keyevent.keycode_volume_up)

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