1 /* 2 * Copyright (C) 2013 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.camera.app; 18 19 import android.content.Context; 20 import android.location.Location; 21 import android.os.Bundle; 22 23 import com.android.camera.debug.Log; 24 import com.android.camera.util.AndroidServices; 25 26 /** 27 * A class that handles legacy (network, gps) location providers, in the event 28 * the fused location provider from Google Play Services is unavailable. 29 */ 30 public class LegacyLocationProvider implements LocationProvider { 31 private static final Log.Tag TAG = new Log.Tag("LcyLocProvider"); 32 33 private Context mContext; 34 private android.location.LocationManager mLocationManager; 35 private boolean mRecordLocation; 36 37 LocationListener [] mLocationListeners = new LocationListener[] { 38 new LocationListener(android.location.LocationManager.GPS_PROVIDER), 39 new LocationListener(android.location.LocationManager.NETWORK_PROVIDER) 40 }; 41 42 public LegacyLocationProvider(Context context) { 43 mContext = context; 44 } 45 46 @Override 47 public Location getCurrentLocation() { 48 if (!mRecordLocation) { 49 return null; 50 } 51 52 // go in best to worst order 53 for (int i = 0; i < mLocationListeners.length; i++) { 54 Location l = mLocationListeners[i].current(); 55 if (l != null) { 56 return l; 57 } 58 } 59 Log.d(TAG, "No location received yet."); 60 return null; 61 } 62 63 @Override 64 public void recordLocation(boolean recordLocation) { 65 if (mRecordLocation != recordLocation) { 66 mRecordLocation = recordLocation; 67 if (recordLocation) { 68 startReceivingLocationUpdates(); 69 } else { 70 stopReceivingLocationUpdates(); 71 } 72 } 73 } 74 75 @Override 76 public void disconnect() { 77 Log.d(TAG, "disconnect"); 78 // The onPause() call to stopReceivingLocationUpdates is sufficient to unregister the 79 // Network/GPS listener. 80 } 81 82 private void startReceivingLocationUpdates() { 83 Log.v(TAG, "starting location updates"); 84 if (mLocationManager == null) { 85 mLocationManager = AndroidServices.instance().provideLocationManager(); 86 } 87 if (mLocationManager != null) { 88 try { 89 mLocationManager.requestLocationUpdates( 90 android.location.LocationManager.NETWORK_PROVIDER, 91 1000, 92 0F, 93 mLocationListeners[1]); 94 } catch (SecurityException ex) { 95 Log.i(TAG, "fail to request location update, ignore", ex); 96 } catch (IllegalArgumentException ex) { 97 Log.d(TAG, "provider does not exist " + ex.getMessage()); 98 } 99 try { 100 mLocationManager.requestLocationUpdates( 101 android.location.LocationManager.GPS_PROVIDER, 102 1000, 103 0F, 104 mLocationListeners[0]); 105 } catch (SecurityException ex) { 106 Log.i(TAG, "fail to request location update, ignore", ex); 107 } catch (IllegalArgumentException ex) { 108 Log.d(TAG, "provider does not exist " + ex.getMessage()); 109 } 110 Log.d(TAG, "startReceivingLocationUpdates"); 111 } 112 } 113 114 private void stopReceivingLocationUpdates() { 115 Log.v(TAG, "stopping location updates"); 116 if (mLocationManager != null) { 117 for (int i = 0; i < mLocationListeners.length; i++) { 118 try { 119 mLocationManager.removeUpdates(mLocationListeners[i]); 120 } catch (Exception ex) { 121 Log.i(TAG, "fail to remove location listners, ignore", ex); 122 } 123 } 124 Log.d(TAG, "stopReceivingLocationUpdates"); 125 } 126 } 127 128 private class LocationListener 129 implements android.location.LocationListener { 130 Location mLastLocation; 131 boolean mValid = false; 132 String mProvider; 133 134 public LocationListener(String provider) { 135 mProvider = provider; 136 mLastLocation = new Location(mProvider); 137 } 138 139 @Override 140 public void onLocationChanged(Location newLocation) { 141 if (newLocation.getLatitude() == 0.0 142 && newLocation.getLongitude() == 0.0) { 143 // Hack to filter out 0.0,0.0 locations 144 return; 145 } 146 if (!mValid) { 147 Log.d(TAG, "Got first location."); 148 } 149 mLastLocation.set(newLocation); 150 mValid = true; 151 } 152 153 @Override 154 public void onProviderEnabled(String provider) { 155 } 156 157 @Override 158 public void onProviderDisabled(String provider) { 159 mValid = false; 160 } 161 162 @Override 163 public void onStatusChanged( 164 String provider, int status, Bundle extras) { 165 switch(status) { 166 case android.location.LocationProvider.OUT_OF_SERVICE: 167 case android.location.LocationProvider.TEMPORARILY_UNAVAILABLE: { 168 mValid = false; 169 break; 170 } 171 } 172 } 173 174 public Location current() { 175 return mValid ? mLastLocation : null; 176 } 177 } 178 } 179
