1 /* 2 * Copyright (C) 2014 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.location.provider; 18 19 import com.android.internal.util.Preconditions; 20 21 import android.hardware.location.IActivityRecognitionHardware; 22 import android.hardware.location.IActivityRecognitionHardwareSink; 23 import android.os.RemoteException; 24 25 import java.util.ArrayList; 26 import java.util.Collection; 27 import java.util.HashSet; 28 29 /** 30 * A class that exposes {@link IActivityRecognitionHardware} functionality to unbundled services. 31 * @hide 32 */ 33 public final class ActivityRecognitionProvider { 34 private final IActivityRecognitionHardware mService; 35 private final HashSet<Sink> mSinkSet = new HashSet<>(); 36 37 // the following constants must remain in sync with activity_recognition.h 38 39 public static final String ACTIVITY_IN_VEHICLE = "android.activity_recognition.in_vehicle"; 40 public static final String ACTIVITY_ON_BICYCLE = "android.activity_recognition.on_bicycle"; 41 public static final String ACTIVITY_WALKING = "android.activity_recognition.walking"; 42 public static final String ACTIVITY_RUNNING = "android.activity_recognition.running"; 43 public static final String ACTIVITY_STILL = "android.activity_recognition.still"; 44 public static final String ACTIVITY_TILTING = "android.activity_recognition.tilting"; 45 46 // NOTE: when adding an additional EVENT_TYPE_, EVENT_TYPE_COUNT needs to be updated in 47 // android.hardware.location.ActivityRecognitionHardware 48 public static final int EVENT_TYPE_FLUSH_COMPLETE = 0; 49 public static final int EVENT_TYPE_ENTER = 1; 50 public static final int EVENT_TYPE_EXIT = 2; 51 52 // end constants activity_recognition.h 53 54 /** 55 * Used to receive Activity-Recognition events. 56 */ 57 public interface Sink { onActivityChanged(ActivityChangedEvent event)58 void onActivityChanged(ActivityChangedEvent event); 59 } 60 ActivityRecognitionProvider(IActivityRecognitionHardware service)61 public ActivityRecognitionProvider(IActivityRecognitionHardware service) 62 throws RemoteException { 63 Preconditions.checkNotNull(service); 64 mService = service; 65 mService.registerSink(new SinkTransport()); 66 } 67 getSupportedActivities()68 public String[] getSupportedActivities() throws RemoteException { 69 return mService.getSupportedActivities(); 70 } 71 isActivitySupported(String activity)72 public boolean isActivitySupported(String activity) throws RemoteException { 73 return mService.isActivitySupported(activity); 74 } 75 registerSink(Sink sink)76 public void registerSink(Sink sink) { 77 Preconditions.checkNotNull(sink); 78 synchronized (mSinkSet) { 79 mSinkSet.add(sink); 80 } 81 } 82 83 // TODO: if this functionality is exposed to 3rd party developers, handle unregistration (here 84 // and in the service) of all sinks while failing to disable all events unregisterSink(Sink sink)85 public void unregisterSink(Sink sink) { 86 Preconditions.checkNotNull(sink); 87 synchronized (mSinkSet) { 88 mSinkSet.remove(sink); 89 } 90 } 91 enableActivityEvent(String activity, int eventType, long reportLatencyNs)92 public boolean enableActivityEvent(String activity, int eventType, long reportLatencyNs) 93 throws RemoteException { 94 return mService.enableActivityEvent(activity, eventType, reportLatencyNs); 95 } 96 disableActivityEvent(String activity, int eventType)97 public boolean disableActivityEvent(String activity, int eventType) throws RemoteException { 98 return mService.disableActivityEvent(activity, eventType); 99 } 100 flush()101 public boolean flush() throws RemoteException { 102 return mService.flush(); 103 } 104 105 private final class SinkTransport extends IActivityRecognitionHardwareSink.Stub { 106 @Override onActivityChanged(android.hardware.location.ActivityChangedEvent event)107 public void onActivityChanged(android.hardware.location.ActivityChangedEvent event) { 108 Collection<Sink> sinks; 109 synchronized (mSinkSet) { 110 if (mSinkSet.isEmpty()) { 111 return; 112 } 113 sinks = new ArrayList<>(mSinkSet); 114 } 115 116 // translate the event from platform internal and GmsCore types 117 ArrayList<ActivityRecognitionEvent> gmsEvents = new ArrayList<>(); 118 for (android.hardware.location.ActivityRecognitionEvent reportingEvent 119 : event.getActivityRecognitionEvents()) { 120 ActivityRecognitionEvent gmsEvent = new ActivityRecognitionEvent( 121 reportingEvent.getActivity(), 122 reportingEvent.getEventType(), 123 reportingEvent.getTimestampNs()); 124 gmsEvents.add(gmsEvent); 125 } 126 ActivityChangedEvent gmsEvent = new ActivityChangedEvent(gmsEvents); 127 128 for (Sink sink : sinks) { 129 sink.onActivityChanged(gmsEvent); 130 } 131 } 132 } 133 } 134