// This method is called when the proximity sensor reports a state change,
// e.g. from "NEAR to FAR" or from "FAR to NEAR".
private void onProximitySensorChangedState() {
// The proximity sensor should only be activated when there are exactly two
// available audio devices.
if (audioDevices.size() == 2
&& audioDevices.contains(AppRTCAudioManager.AudioDevice.EARPIECE)
&& audioDevices.contains(AppRTCAudioManager.AudioDevice.SPEAKER_PHONE)) {
if (proximitySensor.sensorReportsNearState()) {
// Sensor reports that a "handset is being held up to a person's ear",
// or "something is covering the light sensor".
setAudioDevice(AppRTCAudioManager.AudioDevice.EARPIECE);
} else {
// Sensor reports that a "handset is removed from a person's ear", or
// "the light sensor is no longer covered".
setAudioDevice(AppRTCAudioManager.AudioDevice.SPEAKER_PHONE);
}
}
}
