1 /*
2  * Copyright (C) 2021 The Android Open Source Project
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *      http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
17 package com.android.server.display.utils;
18 
19 import android.hardware.Sensor;
20 import android.hardware.SensorManager;
21 import android.text.TextUtils;
22 
23 import java.util.List;
24 
25 /**
26  * Provides utility methods for dealing with sensors.
27  */
28 public class SensorUtils {
29     public static final int NO_FALLBACK = 0;
30 
31     /**
32      * Finds the specified sensor by type and name using SensorManager.
33      */
findSensor(SensorManager sensorManager, String sensorType, String sensorName, int fallbackType)34     public static Sensor findSensor(SensorManager sensorManager, String sensorType,
35             String sensorName, int fallbackType) {
36         final boolean isNameSpecified = !TextUtils.isEmpty(sensorName);
37         final boolean isTypeSpecified = !TextUtils.isEmpty(sensorType);
38         if (isNameSpecified || isTypeSpecified) {
39             final List<Sensor> sensors = sensorManager.getSensorList(Sensor.TYPE_ALL);
40             for (Sensor sensor : sensors) {
41                 if ((!isNameSpecified || sensorName.equals(sensor.getName()))
42                         && (!isTypeSpecified || sensorType.equals(sensor.getStringType()))) {
43                     return sensor;
44                 }
45             }
46         }
47         if (fallbackType != NO_FALLBACK) {
48             return sensorManager.getDefaultSensor(fallbackType);
49         }
50 
51         return null;
52     }
53 
54 }
55