RESTRICT AUTOMERGE Use Alternative Prox Sensor for Falsing

This allows new phones to use a sensor with a different
theshold when attempting to determine the devices proximity
to surfaces.

Bug: 149420648
Test: manual
Change-Id: Iee8568f7d9f58359dc1e72fd195a42abeaf2ddf3

packages/SystemUI/res/values/config.xml

@@ -201,6 +201,14 @@
          always-on display) -->
     <string name="doze_brightness_sensor_type" translatable="false"></string>
 
+    <!-- Override value to use for proximity sensor.  -->
+    <string name="proximity_sensor_type" translatable="false">@string/doze_brightness_sensor_type</string>
+
+    <!-- If using proximity_sensor_type, specifies a threshold value to distinguish near and
+         far break points. A sensor value less than or equal to this is considered "near". -->
+    <item name="proximity_sensor_threshold" translatable="false" format="float" type="dimen">
+        0</item>
+
     <!-- Doze: pulse parameter - how long does it take to fade in? -->
     <integer name="doze_pulse_duration_in">130</integer>
 

packages/SystemUI/src/com/android/systemui/doze/DozeSensors.java

@@ -43,11 +43,11 @@ import androidx.annotation.VisibleForTesting;
 
 import com.android.internal.logging.MetricsLogger;
 import com.android.internal.logging.nano.MetricsProto;
-import com.android.systemui.R;
 import com.android.systemui.plugins.SensorManagerPlugin;
 import com.android.systemui.statusbar.phone.DozeParameters;
 import com.android.systemui.util.AlarmTimeout;
 import com.android.systemui.util.AsyncSensorManager;
+import com.android.systemui.util.ProximitySensor;
 import com.android.systemui.util.wakelock.WakeLock;
 
 import java.io.PrintWriter;
@@ -288,6 +288,7 @@ public class DozeSensors {
         final AlarmTimeout mCooldownTimer;
         final AlwaysOnDisplayPolicy mPolicy;
         final Sensor mSensor;
+        private final float mSensorThreshold;
         final boolean mUsingBrightnessSensor;
 
         public ProxSensor(AlwaysOnDisplayPolicy policy) {
@@ -297,11 +298,14 @@ public class DozeSensors {
 
             // The default prox sensor can be noisy, so let's use a prox gated brightness sensor
             // if available.
-            Sensor sensor = DozeSensors.findSensorWithType(mSensorManager,
+            Sensor sensor = ProximitySensor.findCustomProxSensor(mContext, mSensorManager);
-                    mContext.getString(R.string.doze_brightness_sensor_type));
             mUsingBrightnessSensor = sensor != null;
-            if (sensor == null) {
+            if (mUsingBrightnessSensor) {
+                mSensorThreshold = ProximitySensor.getBrightnessSensorThreshold(
+                        mContext.getResources());
+            } else {
                 sensor = mSensorManager.getDefaultSensor(Sensor.TYPE_PROXIMITY);
+                mSensorThreshold = sensor.getMaximumRange();
             }
             mSensor = sensor;
         }
@@ -343,11 +347,9 @@ public class DozeSensors {
             if (DEBUG) Log.d(TAG, "onSensorChanged " + event);
 
             if (mUsingBrightnessSensor) {
-                // The custom brightness sensor is gated by the proximity sensor and will return 0
+                mCurrentlyFar = event.values[0] > mSensorThreshold;
-                // whenever prox is covered.
-                mCurrentlyFar = event.values[0] > 0;
             } else {
-                mCurrentlyFar = event.values[0] >= event.sensor.getMaximumRange();
+                mCurrentlyFar = event.values[0] >= mSensorThreshold;
             }
             mProxCallback.accept(mCurrentlyFar);
 

packages/SystemUI/src/com/android/systemui/doze/DozeTriggers.java

@@ -41,10 +41,10 @@ import com.android.internal.logging.MetricsLogger;
 import com.android.internal.logging.nano.MetricsProto.MetricsEvent;
 import com.android.internal.util.Preconditions;
 import com.android.systemui.Dependency;
-import com.android.systemui.R;
 import com.android.systemui.dock.DockManager;
 import com.android.systemui.statusbar.phone.DozeParameters;
 import com.android.systemui.util.Assert;
+import com.android.systemui.util.ProximitySensor;
 import com.android.systemui.util.wakelock.WakeLock;
 
 import java.io.PrintWriter;
@@ -431,15 +431,18 @@ public class DozeTriggers implements DozeMachine.Part {
         private boolean mFinished;
         private float mMaxRange;
         private boolean mUsingBrightnessSensor;
+        private float mSensorThreshold;
 
         protected abstract void onProximityResult(int result);
 
         public void check() {
             Preconditions.checkState(!mFinished && !mRegistered);
-            Sensor sensor = DozeSensors.findSensorWithType(mSensorManager,
+            Sensor sensor = ProximitySensor.findCustomProxSensor(mContext, mSensorManager);
-                    mContext.getString(R.string.doze_brightness_sensor_type));
             mUsingBrightnessSensor = sensor != null;
-            if (sensor == null) {
+            if (mUsingBrightnessSensor) {
+                mSensorThreshold = ProximitySensor.getBrightnessSensorThreshold(
+                        mContext.getResources());
+            } else {
                 sensor = mSensorManager.getDefaultSensor(Sensor.TYPE_PROXIMITY);
             }
             if (sensor == null) {
@@ -473,7 +476,7 @@ public class DozeTriggers implements DozeMachine.Part {
                 if (mUsingBrightnessSensor) {
                     // The custom brightness sensor is gated by the proximity sensor and will
                     // return 0 whenever prox is covered.
-                    isNear = event.values[0] == 0;
+                    isNear = event.values[0] <= mSensorThreshold;
                 } else {
                     isNear = event.values[0] < mMaxRange;
                 }

packages/SystemUI/src/com/android/systemui/util/ProximitySensor.java

@@ -17,6 +17,7 @@
 package com.android.systemui.util;
 
 import android.content.Context;
+import android.content.res.Resources;
 import android.hardware.Sensor;
 import android.hardware.SensorEvent;
 import android.hardware.SensorEventListener;
@@ -40,7 +41,7 @@ public class ProximitySensor {
     private final Sensor mSensor;
     private final AsyncSensorManager mSensorManager;
     private final boolean mUsingBrightnessSensor;
-    private final float mMaxRange;
+    private final float mThreshold;
 
     private SensorEventListener mSensorEventListener = new SensorEventListener() {
         @Override
@@ -59,7 +60,7 @@ public class ProximitySensor {
     @Inject
     public ProximitySensor(Context context, AsyncSensorManager sensorManager) {
         mSensorManager = sensorManager;
-        Sensor sensor = findBrightnessSensor(context, sensorManager);
+        Sensor sensor = findCustomProxSensor(context, sensorManager);
 
         if (sensor == null) {
             mUsingBrightnessSensor = false;
@@ -69,9 +70,13 @@ public class ProximitySensor {
         }
         mSensor = sensor;
         if (mSensor != null) {
-            mMaxRange = mSensor.getMaximumRange();
+            if (mUsingBrightnessSensor) {
+                mThreshold = getBrightnessSensorThreshold(context.getResources());
+            } else {
+                mThreshold = mSensor.getMaximumRange();
+            }
         } else {
-            mMaxRange = 0;
+            mThreshold = 0;
         }
     }
 
@@ -79,8 +84,18 @@ public class ProximitySensor {
         mTag = tag;
     }
 
-    private Sensor findBrightnessSensor(Context context, SensorManager sensorManager) {
+    /**
-        String sensorType = context.getString(R.string.doze_brightness_sensor_type);
+     * Returns a brightness sensor that can be used for proximity purposes.
+     *
+     * @deprecated This method exists for legacy purposes. Use the containing class directly.
+     */
+    @Deprecated
+    public static Sensor findCustomProxSensor(Context context, SensorManager sensorManager) {
+        String sensorType = context.getString(R.string.proximity_sensor_type);
+        if (sensorType.isEmpty()) {
+            return null;
+        }
+
         List<Sensor> sensorList = sensorManager.getSensorList(Sensor.TYPE_ALL);
         Sensor sensor = null;
         for (Sensor s : sensorList) {
@@ -93,6 +108,16 @@ public class ProximitySensor {
         return sensor;
     }
 
+    /**
+     * Returns a threshold value that can be used along with {@link #findCustomProxSensor}
+     *
+     * @deprecated This method exists for legacy purposes. Use the containing class directly.
+     */
+    @Deprecated
+    public static float getBrightnessSensorThreshold(Resources resources) {
+        return resources.getFloat(R.dimen.proximity_sensor_threshold);
+    }
+
     /**
      * Returns {@code false} if a Proximity sensor is not available.
      */
@@ -141,11 +166,11 @@ public class ProximitySensor {
     }
 
     private void onSensorEvent(SensorEvent event) {
-        boolean near = event.values[0] < mMaxRange;
         if (mUsingBrightnessSensor) {
-            near = event.values[0] == 0;
+            mNear = event.values[0] <= mThreshold;
+        } else {
+            mNear = event.values[0] < mThreshold;
         }
-        mNear = near;
         mListeners.forEach(proximitySensorListener ->
                 proximitySensorListener.onProximitySensorEvent(
                         new ProximityEvent(mNear, event.timestamp)));