1 /* 2 * Copyright (C) 2020 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 package com.android.server.location.geofence; 17 18 import android.annotation.Nullable; 19 import android.content.ComponentName; 20 import android.content.Context; 21 import android.content.Intent; 22 import android.content.ServiceConnection; 23 import android.hardware.location.GeofenceHardwareService; 24 import android.hardware.location.IGeofenceHardware; 25 import android.location.IGeofenceProvider; 26 import android.location.IGpsGeofenceHardware; 27 import android.os.IBinder; 28 import android.os.RemoteException; 29 import android.os.UserHandle; 30 import android.util.Log; 31 32 import com.android.server.servicewatcher.CurrentUserServiceSupplier; 33 import com.android.server.servicewatcher.CurrentUserServiceSupplier.BoundServiceInfo; 34 import com.android.server.servicewatcher.ServiceWatcher; 35 import com.android.server.servicewatcher.ServiceWatcher.ServiceListener; 36 37 import java.util.Objects; 38 39 /** 40 * @hide 41 */ 42 public final class GeofenceProxy implements ServiceListener<BoundServiceInfo> { 43 44 private static final String TAG = "GeofenceProxy"; 45 private static final String SERVICE_ACTION = "com.android.location.service.GeofenceProvider"; 46 47 /** 48 * Creates and registers this proxy. If no suitable service is available for the proxy, returns 49 * null. 50 */ 51 @Nullable createAndBind(Context context, IGpsGeofenceHardware gpsGeofence)52 public static GeofenceProxy createAndBind(Context context, IGpsGeofenceHardware gpsGeofence) { 53 GeofenceProxy proxy = new GeofenceProxy(context, gpsGeofence); 54 if (proxy.register(context)) { 55 return proxy; 56 } else { 57 return null; 58 } 59 } 60 61 final IGpsGeofenceHardware mGpsGeofenceHardware; 62 final ServiceWatcher mServiceWatcher; 63 64 volatile IGeofenceHardware mGeofenceHardware; 65 GeofenceProxy(Context context, IGpsGeofenceHardware gpsGeofence)66 private GeofenceProxy(Context context, IGpsGeofenceHardware gpsGeofence) { 67 mGpsGeofenceHardware = Objects.requireNonNull(gpsGeofence); 68 mServiceWatcher = ServiceWatcher.create(context, 69 "GeofenceProxy", 70 new CurrentUserServiceSupplier(context, SERVICE_ACTION, 71 com.android.internal.R.bool.config_enableGeofenceOverlay, 72 com.android.internal.R.string.config_geofenceProviderPackageName), 73 this); 74 75 mGeofenceHardware = null; 76 } 77 updateGeofenceHardware(IBinder binder)78 void updateGeofenceHardware(IBinder binder) throws RemoteException { 79 IGeofenceProvider.Stub.asInterface(binder).setGeofenceHardware(mGeofenceHardware); 80 } 81 register(Context context)82 private boolean register(Context context) { 83 boolean resolves = mServiceWatcher.checkServiceResolves(); 84 if (resolves) { 85 mServiceWatcher.register(); 86 context.bindServiceAsUser( 87 new Intent(context, GeofenceHardwareService.class), 88 new GeofenceProxyServiceConnection(), 89 Context.BIND_AUTO_CREATE, 90 UserHandle.SYSTEM); 91 } 92 return resolves; 93 } 94 95 @Override onBind(IBinder binder, BoundServiceInfo boundServiceInfo)96 public void onBind(IBinder binder, BoundServiceInfo boundServiceInfo) throws RemoteException { 97 updateGeofenceHardware(binder); 98 } 99 100 @Override onUnbind()101 public void onUnbind() {} 102 103 private class GeofenceProxyServiceConnection implements ServiceConnection { 104 GeofenceProxyServiceConnection()105 GeofenceProxyServiceConnection() {} 106 107 @Override onServiceConnected(ComponentName name, IBinder service)108 public void onServiceConnected(ComponentName name, IBinder service) { 109 IGeofenceHardware geofenceHardware = IGeofenceHardware.Stub.asInterface(service); 110 111 try { 112 geofenceHardware.setGpsGeofenceHardware(mGpsGeofenceHardware); 113 mGeofenceHardware = geofenceHardware; 114 mServiceWatcher.runOnBinder(GeofenceProxy.this::updateGeofenceHardware); 115 } catch (RemoteException e) { 116 Log.w(TAG, "unable to initialize geofence hardware", e); 117 } 118 } 119 120 @Override onServiceDisconnected(ComponentName name)121 public void onServiceDisconnected(ComponentName name) { 122 mGeofenceHardware = null; 123 mServiceWatcher.runOnBinder(GeofenceProxy.this::updateGeofenceHardware); 124 } 125 } 126 } 127