| /* |
| * Copyright (C) 2014 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 android.hardware.location; |
| |
| import android.Manifest; |
| import android.content.Context; |
| import android.os.RemoteCallbackList; |
| import android.os.RemoteException; |
| import android.text.TextUtils; |
| import android.util.Log; |
| |
| /** |
| * A class that implements an {@link IActivityRecognitionHardware} backed up by the Activity |
| * Recognition HAL. |
| * |
| * @hide |
| */ |
| public class ActivityRecognitionHardware extends IActivityRecognitionHardware.Stub { |
| private static final String TAG = "ActivityRecognitionHardware"; |
| |
| private static final String HARDWARE_PERMISSION = Manifest.permission.LOCATION_HARDWARE; |
| private static final int INVALID_ACTIVITY_TYPE = -1; |
| private static final int NATIVE_SUCCESS_RESULT = 0; |
| |
| private static ActivityRecognitionHardware sSingletonInstance = null; |
| private static final Object sSingletonInstanceLock = new Object(); |
| |
| private final Context mContext; |
| private final String[] mSupportedActivities; |
| |
| private final RemoteCallbackList<IActivityRecognitionHardwareSink> mSinks = |
| new RemoteCallbackList<IActivityRecognitionHardwareSink>(); |
| |
| private static class Event { |
| public int activity; |
| public int type; |
| public long timestamp; |
| } |
| |
| private ActivityRecognitionHardware(Context context) { |
| nativeInitialize(); |
| |
| mContext = context; |
| mSupportedActivities = fetchSupportedActivities(); |
| } |
| |
| public static ActivityRecognitionHardware getInstance(Context context) { |
| synchronized (sSingletonInstanceLock) { |
| if (sSingletonInstance == null) { |
| sSingletonInstance = new ActivityRecognitionHardware(context); |
| } |
| |
| return sSingletonInstance; |
| } |
| } |
| |
| public static boolean isSupported() { |
| return nativeIsSupported(); |
| } |
| |
| @Override |
| public String[] getSupportedActivities() { |
| checkPermissions(); |
| return mSupportedActivities; |
| } |
| |
| @Override |
| public boolean isActivitySupported(String activity) { |
| checkPermissions(); |
| int activityType = getActivityType(activity); |
| return activityType != INVALID_ACTIVITY_TYPE; |
| } |
| |
| @Override |
| public boolean registerSink(IActivityRecognitionHardwareSink sink) { |
| checkPermissions(); |
| return mSinks.register(sink); |
| } |
| |
| @Override |
| public boolean unregisterSink(IActivityRecognitionHardwareSink sink) { |
| checkPermissions(); |
| return mSinks.unregister(sink); |
| } |
| |
| @Override |
| public boolean enableActivityEvent(String activity, int eventType, long reportLatencyNs) { |
| checkPermissions(); |
| |
| int activityType = getActivityType(activity); |
| if (activityType == INVALID_ACTIVITY_TYPE) { |
| return false; |
| } |
| |
| int result = nativeEnableActivityEvent(activityType, eventType, reportLatencyNs); |
| return result == NATIVE_SUCCESS_RESULT; |
| } |
| |
| @Override |
| public boolean disableActivityEvent(String activity, int eventType) { |
| checkPermissions(); |
| |
| int activityType = getActivityType(activity); |
| if (activityType == INVALID_ACTIVITY_TYPE) { |
| return false; |
| } |
| |
| int result = nativeDisableActivityEvent(activityType, eventType); |
| return result == NATIVE_SUCCESS_RESULT; |
| } |
| |
| @Override |
| public boolean flush() { |
| checkPermissions(); |
| int result = nativeFlush(); |
| return result == NATIVE_SUCCESS_RESULT; |
| } |
| |
| /** |
| * Called by the Activity-Recognition HAL. |
| */ |
| private void onActivityChanged(Event[] events) { |
| if (events == null || events.length == 0) { |
| Log.d(TAG, "No events to broadcast for onActivityChanged."); |
| return; |
| } |
| |
| int eventsLength = events.length; |
| ActivityRecognitionEvent activityRecognitionEventArray[] = |
| new ActivityRecognitionEvent[eventsLength]; |
| for (int i = 0; i < eventsLength; ++i) { |
| Event event = events[i]; |
| String activityName = getActivityName(event.activity); |
| activityRecognitionEventArray[i] = |
| new ActivityRecognitionEvent(activityName, event.type, event.timestamp); |
| } |
| ActivityChangedEvent activityChangedEvent = |
| new ActivityChangedEvent(activityRecognitionEventArray); |
| |
| int size = mSinks.beginBroadcast(); |
| for (int i = 0; i < size; ++i) { |
| IActivityRecognitionHardwareSink sink = mSinks.getBroadcastItem(i); |
| try { |
| sink.onActivityChanged(activityChangedEvent); |
| } catch (RemoteException e) { |
| Log.e(TAG, "Error delivering activity changed event.", e); |
| } |
| } |
| mSinks.finishBroadcast(); |
| |
| } |
| |
| private String getActivityName(int activityType) { |
| if (activityType < 0 || activityType >= mSupportedActivities.length) { |
| String message = String.format( |
| "Invalid ActivityType: %d, SupportedActivities: %d", |
| activityType, |
| mSupportedActivities.length); |
| Log.e(TAG, message); |
| return null; |
| } |
| |
| return mSupportedActivities[activityType]; |
| } |
| |
| private int getActivityType(String activity) { |
| if (TextUtils.isEmpty(activity)) { |
| return INVALID_ACTIVITY_TYPE; |
| } |
| |
| int supportedActivitiesLength = mSupportedActivities.length; |
| for (int i = 0; i < supportedActivitiesLength; ++i) { |
| if (activity.equals(mSupportedActivities[i])) { |
| return i; |
| } |
| } |
| |
| return INVALID_ACTIVITY_TYPE; |
| } |
| |
| private void checkPermissions() { |
| String message = String.format( |
| "Permission '%s' not granted to access ActivityRecognitionHardware", |
| HARDWARE_PERMISSION); |
| mContext.enforceCallingPermission(HARDWARE_PERMISSION, message); |
| } |
| |
| private String[] fetchSupportedActivities() { |
| String[] supportedActivities = nativeGetSupportedActivities(); |
| if (supportedActivities != null) { |
| return supportedActivities; |
| } |
| |
| return new String[0]; |
| } |
| |
| // native bindings |
| static { nativeClassInit(); } |
| |
| private static native void nativeClassInit(); |
| private static native boolean nativeIsSupported(); |
| |
| private native void nativeInitialize(); |
| private native void nativeRelease(); |
| private native String[] nativeGetSupportedActivities(); |
| private native int nativeEnableActivityEvent( |
| int activityType, |
| int eventType, |
| long reportLatenceNs); |
| private native int nativeDisableActivityEvent(int activityType, int eventType); |
| private native int nativeFlush(); |
| } |