| /* |
| * Copyright (C) 2019 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package com.android.systemui.util; |
| |
| import android.content.Context; |
| import android.hardware.Sensor; |
| import android.hardware.SensorEvent; |
| import android.hardware.SensorEventListener; |
| import android.hardware.SensorManager; |
| import android.util.Log; |
| |
| import com.android.systemui.R; |
| |
| import java.util.ArrayList; |
| import java.util.List; |
| |
| import javax.inject.Inject; |
| |
| /** |
| * Simple wrapper around SensorManager customized for the Proximity sensor. |
| */ |
| public class ProximitySensor { |
| private static final String TAG = "ProxSensor"; |
| private static final boolean DEBUG = false; |
| |
| private final Sensor mSensor; |
| private final AsyncSensorManager mSensorManager; |
| private final boolean mUsingBrightnessSensor; |
| private final float mMaxRange; |
| |
| private SensorEventListener mSensorEventListener = new SensorEventListener() { |
| @Override |
| public synchronized void onSensorChanged(SensorEvent event) { |
| onSensorEvent(event); |
| } |
| |
| @Override |
| public void onAccuracyChanged(Sensor sensor, int accuracy) { |
| } |
| }; |
| private boolean mNear; |
| private List<ProximitySensorListener> mListeners = new ArrayList<>(); |
| private String mTag = null; |
| |
| @Inject |
| public ProximitySensor(Context context, AsyncSensorManager sensorManager) { |
| mSensorManager = sensorManager; |
| Sensor sensor = findBrightnessSensor(context, sensorManager); |
| |
| if (sensor == null) { |
| mUsingBrightnessSensor = false; |
| sensor = sensorManager.getDefaultSensor(Sensor.TYPE_PROXIMITY); |
| } else { |
| mUsingBrightnessSensor = true; |
| } |
| mSensor = sensor; |
| if (mSensor != null) { |
| mMaxRange = mSensor.getMaximumRange(); |
| } else { |
| mMaxRange = 0; |
| } |
| } |
| |
| public void setTag(String tag) { |
| mTag = tag; |
| } |
| |
| private Sensor findBrightnessSensor(Context context, SensorManager sensorManager) { |
| String sensorType = context.getString(R.string.doze_brightness_sensor_type); |
| List<Sensor> sensorList = sensorManager.getSensorList(Sensor.TYPE_ALL); |
| Sensor sensor = null; |
| for (Sensor s : sensorList) { |
| if (sensorType.equals(s.getStringType())) { |
| sensor = s; |
| break; |
| } |
| } |
| |
| return sensor; |
| } |
| |
| /** |
| * Returns {@code false} if a Proximity sensor is not available. |
| */ |
| public boolean getSensorAvailable() { |
| return mSensor != null; |
| } |
| |
| /** |
| * Add a listener. |
| * |
| * Registers itself with the {@link SensorManager} if this is the first listener |
| * added. |
| */ |
| public boolean register(ProximitySensorListener listener) { |
| if (!getSensorAvailable()) { |
| return false; |
| } |
| |
| logDebug("using brightness sensor? " + mUsingBrightnessSensor); |
| mListeners.add(listener); |
| if (mListeners.size() == 1) { |
| logDebug("registering sensor listener"); |
| mSensorManager.registerListener( |
| mSensorEventListener, mSensor, SensorManager.SENSOR_DELAY_GAME); |
| } |
| |
| return true; |
| } |
| |
| /** |
| * Remove a listener. |
| * |
| * If all listeners are removed from an instance of this class, |
| * it will unregister itself with the SensorManager. |
| */ |
| public void unregister(ProximitySensorListener listener) { |
| mListeners.remove(listener); |
| if (mListeners.size() == 0) { |
| logDebug("unregistering sensor listener"); |
| mSensorManager.unregisterListener(mSensorEventListener); |
| } |
| } |
| |
| public boolean isNear() { |
| return getSensorAvailable() && mNear; |
| } |
| |
| private void onSensorEvent(SensorEvent event) { |
| boolean near = event.values[0] < mMaxRange; |
| if (mUsingBrightnessSensor) { |
| near = event.values[0] == 0; |
| } |
| mNear = near; |
| mListeners.forEach(proximitySensorListener -> |
| proximitySensorListener.onProximitySensorEvent( |
| new ProximityEvent(mNear, event.timestamp))); |
| } |
| |
| /** Implement to be notified of ProximityEvents. */ |
| public interface ProximitySensorListener { |
| /** Called when the ProximitySensor changes. */ |
| void onProximitySensorEvent(ProximityEvent proximityEvent); |
| } |
| |
| /** |
| * Returned when the near/far state of a {@link ProximitySensor} changes. |
| */ |
| public static class ProximityEvent { |
| private final boolean mNear; |
| private final long mTimestampNs; |
| |
| public ProximityEvent(boolean near, long timestampNs) { |
| mNear = near; |
| mTimestampNs = timestampNs; |
| } |
| |
| public boolean getNear() { |
| return mNear; |
| } |
| |
| public long getTimestampNs() { |
| return mTimestampNs; |
| } |
| } |
| |
| private void logDebug(String msg) { |
| if (DEBUG) { |
| Log.d(TAG, (mTag != null ? "[" + mTag + "] " : "") + msg); |
| } |
| } |
| } |