/** Called each time a new audio device has been added or removed. */
private void onAudioManagerChangedState() {
Log.d(
TAG,
"onAudioManagerChangedState: devices="
+ audioDevices
+ ", selected="
+ selectedAudioDevice);
// Enable the proximity sensor if there are two available audio devices
// in the list. Given the current implementation, we know that the choice
// will then be between EARPIECE and SPEAKER_PHONE.
if (audioDevices.size() == 2) {
AppRTCUtils.assertIsTrue(
audioDevices.contains(AudioDevice.EARPIECE)
&& audioDevices.contains(AudioDevice.SPEAKER_PHONE));
// Start the proximity sensor.
proximitySensor.start();
} else if (audioDevices.size() == 1) {
// Stop the proximity sensor since it is no longer needed.
proximitySensor.stop();
} else {
Log.e(TAG, "Invalid device list");
}
if (onStateChangeListener != null) {
// Run callback to notify a listening client. The client can then
// use public getters to query the new state.
onStateChangeListener.run();
}
}
// 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);
}
}
}
private AppRTCAudioManager(Context context, Runnable deviceStateChangeListener) {
apprtcContext = context;
onStateChangeListener = deviceStateChangeListener;
audioManager = ((AudioManager) context.getSystemService(Context.AUDIO_SERVICE));
// Create and initialize the proximity sensor.
// Tablet devices (e.g. Nexus 7) does not support proximity sensors.
// Note that, the sensor will not be active until start() has been called.
proximitySensor =
AppRTCProximitySensor.create(
context,
new Runnable() {
// This method will be called each time a state change is detected.
// Example: user holds his hand over the device (closer than ~5 cm),
// or removes his hand from the device.
public void run() {
onProximitySensorChangedState();
}
});
AppRTCUtils.logDeviceInfo(TAG);
}
public void close() {
Log.d(TAG, "close");
if (!initialized) {
return;
}
unregisterForWiredHeadsetIntentBroadcast();
// Restore previously stored audio states.
setSpeakerphoneOn(savedIsSpeakerPhoneOn);
setMicrophoneMute(savedIsMicrophoneMute);
audioManager.setMode(savedAudioMode);
audioManager.abandonAudioFocus(null);
if (proximitySensor != null) {
proximitySensor.stop();
proximitySensor = null;
}
initialized = false;
}