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/*
* 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 com.android.location.provider;
import android.annotation.NonNull;
import android.annotation.Nullable;
import android.hardware.location.IActivityRecognitionHardware;
import android.hardware.location.IActivityRecognitionHardwareWatcher;
import android.os.Binder;
import android.os.IBinder;
import android.os.Process;
import android.os.RemoteException;
import android.util.Log;
/**
* A watcher class for Activity-Recognition instances.
*/
public class ActivityRecognitionProviderWatcher {
private static final String TAG = "ActivityRecognitionProviderWatcher";
private static ActivityRecognitionProviderWatcher sWatcher;
private static final Object sWatcherLock = new Object();
private ActivityRecognitionProvider mActivityRecognitionProvider;
private ActivityRecognitionProviderWatcher() {}
public static ActivityRecognitionProviderWatcher getInstance() {
synchronized (sWatcherLock) {
if (sWatcher == null) {
sWatcher = new ActivityRecognitionProviderWatcher();
}
return sWatcher;
}
}
private IActivityRecognitionHardwareWatcher.Stub mWatcherStub =
new IActivityRecognitionHardwareWatcher.Stub() {
@Override
public void onInstanceChanged(IActivityRecognitionHardware instance) {
int callingUid = Binder.getCallingUid();
if (callingUid != Process.SYSTEM_UID) {
Log.d(TAG, "Ignoring calls from non-system server. Uid: " + callingUid);
return;
}
try {
mActivityRecognitionProvider = new ActivityRecognitionProvider(instance);
} catch (RemoteException e) {
Log.e(TAG, "Error creating Hardware Activity-Recognition", e);
}
}
};
/**
* Gets the binder needed to interact with proxy provider in the platform.
*/
@NonNull
public IBinder getBinder() {
return mWatcherStub;
}
/**
* Gets an object that supports the functionality of {@link ActivityRecognitionProvider}.
*
* @return Non-null value if the functionality is supported by the platform, false otherwise.
*/
@Nullable
public ActivityRecognitionProvider getActivityRecognitionProvider() {
return mActivityRecognitionProvider;
}
}
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