1 /* 2 * Copyright (C) 2015 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 android.car.hardware; 18 19 import android.car.hardware.CarSensorEvent; 20 import android.car.hardware.ICarSensorEventListener; 21 22 /** @hide */ 23 interface ICarSensor { 24 getSupportedSensors()25 int[] getSupportedSensors() = 0; 26 27 /** 28 * register a callback or update registration if already updated. 29 * @param sensorType sensor to listen with this callback. 30 * @param rate sensor rate. 31 * @return false if requested sensors cannot be subscribed / started. 32 */ registerOrUpdateSensorListener(int sensorType, int rate, in ICarSensorEventListener callback)33 boolean registerOrUpdateSensorListener(int sensorType, int rate, 34 in ICarSensorEventListener callback) = 1; 35 36 /** 37 * get latest sensor event for the type. If there was no update after car connection, it will 38 * return null immediately. 39 */ getLatestSensorEvent(int sensorType)40 CarSensorEvent getLatestSensorEvent(int sensorType) = 2; 41 42 /** 43 * Stop listening for the given sensor type. All other sensors registered before will not 44 * be affected. 45 */ unregisterSensorListener(int sensorType, in ICarSensorEventListener callback)46 void unregisterSensorListener(int sensorType, in ICarSensorEventListener callback) = 3; 47 } 48