init

react/features/mobile/proximity/middleware.ts

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+import { NativeModules } from 'react-native';
+
+import { getCurrentConference } from '../../base/conference/functions';
+import StateListenerRegistry from '../../base/redux/StateListenerRegistry';
+
+/**
+ * State listener which enables / disables the proximity sensor based on the
+ * current conference state. If the proximity sensor is enabled, it will dim
+ * the screen and disable touch controls when an object is nearby. The
+ * functionality is  enabled when the current audio device is the earpiece.
+ */
+StateListenerRegistry.register(
+    /* selector */ state => {
+        const { devices } = state['features/mobile/audio-mode'];
+        const selectedDevice = devices.filter(d => d.selected)[0];
+        const conference = getCurrentConference(state);
+
+        return Boolean(conference && selectedDevice?.type === 'EARPIECE');
+    },
+    /* listener */ proximityEnabled => _setProximityEnabled(proximityEnabled)
+);
+
+/**
+ * Enables / disables the proximity sensor. If the proximity sensor is enabled,
+ * it will dim the screen and disable touch controls when an object is nearby.
+ *
+ * @param {boolean} enabled - True to enable the proximity sensor or false to
+ * disable it.
+ * @private
+ * @returns {void}
+ */
+function _setProximityEnabled(enabled: boolean) {
+    NativeModules.Proximity.setEnabled(Boolean(enabled));
+}