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      1 /*
      2  * Copyright (C) 2010 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.server.location;
     18 
     19 import android.location.Criteria;
     20 import android.location.ILocationManager;
     21 import android.location.Location;
     22 import android.location.LocationManager;
     23 import android.location.LocationProvider;
     24 import android.net.NetworkInfo;
     25 import android.os.Bundle;
     26 import android.os.RemoteException;
     27 import android.os.WorkSource;
     28 import android.util.Log;
     29 
     30 /**
     31  * A passive location provider reports locations received from other providers
     32  * for clients that want to listen passively without actually triggering
     33  * location updates.
     34  *
     35  * {@hide}
     36  */
     37 public class PassiveProvider implements LocationProviderInterface {
     38 
     39     private static final String TAG = "PassiveProvider";
     40 
     41     private final ILocationManager mLocationManager;
     42     private boolean mTracking;
     43 
     44     public PassiveProvider(ILocationManager locationManager) {
     45         mLocationManager = locationManager;
     46     }
     47 
     48     public String getName() {
     49         return LocationManager.PASSIVE_PROVIDER;
     50     }
     51 
     52     public boolean requiresNetwork() {
     53         return false;
     54     }
     55 
     56     public boolean requiresSatellite() {
     57         return false;
     58     }
     59 
     60     public boolean requiresCell() {
     61         return false;
     62     }
     63 
     64     public boolean hasMonetaryCost() {
     65         return false;
     66     }
     67 
     68     public boolean supportsAltitude() {
     69         return false;
     70     }
     71 
     72     public boolean supportsSpeed() {
     73         return false;
     74     }
     75 
     76     public boolean supportsBearing() {
     77         return false;
     78     }
     79 
     80     public int getPowerRequirement() {
     81         return -1;
     82     }
     83 
     84     public boolean meetsCriteria(Criteria criteria) {
     85         // We do not want to match the special passive provider based on criteria.
     86         return false;
     87     }
     88 
     89     public int getAccuracy() {
     90         return -1;
     91     }
     92 
     93     public boolean isEnabled() {
     94         return true;
     95     }
     96 
     97     public void enable() {
     98     }
     99 
    100     public void disable() {
    101     }
    102 
    103     public int getStatus(Bundle extras) {
    104         if (mTracking) {
    105             return LocationProvider.AVAILABLE;
    106         } else {
    107             return LocationProvider.TEMPORARILY_UNAVAILABLE;
    108         }
    109     }
    110 
    111     public long getStatusUpdateTime() {
    112         return -1;
    113     }
    114 
    115     public String getInternalState() {
    116         return null;
    117     }
    118 
    119     public void enableLocationTracking(boolean enable) {
    120         mTracking = enable;
    121     }
    122 
    123     public boolean requestSingleShotFix() {
    124         return false;
    125     }
    126 
    127     public void setMinTime(long minTime, WorkSource ws) {
    128     }
    129 
    130     public void updateNetworkState(int state, NetworkInfo info) {
    131     }
    132 
    133     public void updateLocation(Location location) {
    134         if (mTracking) {
    135             try {
    136                 // pass the location back to the location manager
    137                 mLocationManager.reportLocation(location, true);
    138             } catch (RemoteException e) {
    139                 Log.e(TAG, "RemoteException calling reportLocation");
    140             }
    141         }
    142     }
    143 
    144     public boolean sendExtraCommand(String command, Bundle extras) {
    145         return false;
    146     }
    147 
    148     public void addListener(int uid) {
    149     }
    150 
    151     public void removeListener(int uid) {
    152     }
    153 }
    154