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 com.android.location.provider; 18 19 import android.annotation.NonNull; 20 import android.hardware.location.IActivityRecognitionHardware; 21 import android.hardware.location.IActivityRecognitionHardwareClient; 22 import android.os.Binder; 23 import android.os.IBinder; 24 import android.os.Process; 25 import android.os.RemoteException; 26 import android.util.Log; 27 28 /** 29 * A client class for interaction with an Activity-Recognition provider. 30 */ 31 public abstract class ActivityRecognitionProviderClient { 32 private static final String TAG = "ArProviderClient"; 33 ActivityRecognitionProviderClient()34 protected ActivityRecognitionProviderClient() {} 35 36 private IActivityRecognitionHardwareClient.Stub mClient = 37 new IActivityRecognitionHardwareClient.Stub() { 38 @Override 39 public void onAvailabilityChanged( 40 boolean isSupported, 41 IActivityRecognitionHardware instance) { 42 int callingUid = Binder.getCallingUid(); 43 if (callingUid != Process.SYSTEM_UID) { 44 Log.d(TAG, "Ignoring calls from non-system server. Uid: " + callingUid); 45 return; 46 } 47 ActivityRecognitionProvider provider; 48 try { 49 provider = isSupported ? new ActivityRecognitionProvider(instance) : null; 50 } catch (RemoteException e) { 51 Log.e(TAG, "Error creating Hardware Activity-Recognition Provider.", e); 52 return; 53 } 54 onProviderChanged(isSupported, provider); 55 } 56 }; 57 58 /** 59 * Gets the binder needed to interact with proxy provider in the platform. 60 */ 61 @NonNull getBinder()62 public IBinder getBinder() { 63 return mClient; 64 } 65 66 /** 67 * Called when a change in the availability of {@link ActivityRecognitionProvider} is detected. 68 * 69 * @param isSupported whether the platform supports the provider natively 70 * @param instance the available provider's instance 71 */ onProviderChanged( boolean isSupported, ActivityRecognitionProvider instance)72 public abstract void onProviderChanged( 73 boolean isSupported, 74 ActivityRecognitionProvider instance); 75 } 76