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