Michael Kolb | 8872c23 | 2013-01-29 10:33:22 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2011 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; |
| 18 | |
| 19 | import android.content.Context; |
| 20 | import android.location.Location; |
| 21 | import android.location.LocationProvider; |
| 22 | import android.os.Bundle; |
| 23 | import android.util.Log; |
| 24 | |
| 25 | /** |
| 26 | * A class that handles everything about location. |
| 27 | */ |
| 28 | public class LocationManager { |
| 29 | private static final String TAG = "LocationManager"; |
| 30 | |
| 31 | private Context mContext; |
| 32 | private Listener mListener; |
| 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 interface Listener { |
| 42 | public void showGpsOnScreenIndicator(boolean hasSignal); |
| 43 | public void hideGpsOnScreenIndicator(); |
| 44 | } |
| 45 | |
| 46 | public LocationManager(Context context, Listener listener) { |
| 47 | mContext = context; |
| 48 | mListener = listener; |
| 49 | } |
| 50 | |
| 51 | public Location getCurrentLocation() { |
| 52 | if (!mRecordLocation) return null; |
| 53 | |
| 54 | // go in best to worst order |
| 55 | for (int i = 0; i < mLocationListeners.length; i++) { |
| 56 | Location l = mLocationListeners[i].current(); |
| 57 | if (l != null) return l; |
| 58 | } |
| 59 | Log.d(TAG, "No location received yet."); |
| 60 | return null; |
| 61 | } |
| 62 | |
| 63 | public void recordLocation(boolean recordLocation) { |
| 64 | if (mRecordLocation != recordLocation) { |
| 65 | mRecordLocation = recordLocation; |
| 66 | if (recordLocation) { |
| 67 | startReceivingLocationUpdates(); |
| 68 | } else { |
| 69 | stopReceivingLocationUpdates(); |
| 70 | } |
| 71 | } |
| 72 | } |
| 73 | |
| 74 | private void startReceivingLocationUpdates() { |
| 75 | if (mLocationManager == null) { |
| 76 | mLocationManager = (android.location.LocationManager) |
| 77 | mContext.getSystemService(Context.LOCATION_SERVICE); |
| 78 | } |
| 79 | if (mLocationManager != null) { |
| 80 | try { |
| 81 | mLocationManager.requestLocationUpdates( |
| 82 | android.location.LocationManager.NETWORK_PROVIDER, |
| 83 | 1000, |
| 84 | 0F, |
| 85 | mLocationListeners[1]); |
| 86 | } catch (SecurityException ex) { |
| 87 | Log.i(TAG, "fail to request location update, ignore", ex); |
| 88 | } catch (IllegalArgumentException ex) { |
| 89 | Log.d(TAG, "provider does not exist " + ex.getMessage()); |
| 90 | } |
| 91 | try { |
| 92 | mLocationManager.requestLocationUpdates( |
| 93 | android.location.LocationManager.GPS_PROVIDER, |
| 94 | 1000, |
| 95 | 0F, |
| 96 | mLocationListeners[0]); |
| 97 | if (mListener != null) mListener.showGpsOnScreenIndicator(false); |
| 98 | } catch (SecurityException ex) { |
| 99 | Log.i(TAG, "fail to request location update, ignore", ex); |
| 100 | } catch (IllegalArgumentException ex) { |
| 101 | Log.d(TAG, "provider does not exist " + ex.getMessage()); |
| 102 | } |
| 103 | Log.d(TAG, "startReceivingLocationUpdates"); |
| 104 | } |
| 105 | } |
| 106 | |
| 107 | private void stopReceivingLocationUpdates() { |
| 108 | if (mLocationManager != null) { |
| 109 | for (int i = 0; i < mLocationListeners.length; i++) { |
| 110 | try { |
| 111 | mLocationManager.removeUpdates(mLocationListeners[i]); |
| 112 | } catch (Exception ex) { |
| 113 | Log.i(TAG, "fail to remove location listners, ignore", ex); |
| 114 | } |
| 115 | } |
| 116 | Log.d(TAG, "stopReceivingLocationUpdates"); |
| 117 | } |
| 118 | if (mListener != null) mListener.hideGpsOnScreenIndicator(); |
| 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 GPS is available before start camera, we won't get status |
| 140 | // update so update GPS indicator when we receive data. |
| 141 | if (mListener != null && mRecordLocation && |
| 142 | android.location.LocationManager.GPS_PROVIDER.equals(mProvider)) { |
| 143 | mListener.showGpsOnScreenIndicator(true); |
| 144 | } |
| 145 | if (!mValid) { |
| 146 | Log.d(TAG, "Got first location."); |
| 147 | } |
| 148 | mLastLocation.set(newLocation); |
| 149 | mValid = true; |
| 150 | } |
| 151 | |
| 152 | @Override |
| 153 | public void onProviderEnabled(String provider) { |
| 154 | } |
| 155 | |
| 156 | @Override |
| 157 | public void onProviderDisabled(String provider) { |
| 158 | mValid = false; |
| 159 | } |
| 160 | |
| 161 | @Override |
| 162 | public void onStatusChanged( |
| 163 | String provider, int status, Bundle extras) { |
| 164 | switch(status) { |
| 165 | case LocationProvider.OUT_OF_SERVICE: |
| 166 | case LocationProvider.TEMPORARILY_UNAVAILABLE: { |
| 167 | mValid = false; |
| 168 | if (mListener != null && mRecordLocation && |
| 169 | android.location.LocationManager.GPS_PROVIDER.equals(provider)) { |
| 170 | mListener.showGpsOnScreenIndicator(false); |
| 171 | } |
| 172 | break; |
| 173 | } |
| 174 | } |
| 175 | } |
| 176 | |
| 177 | public Location current() { |
| 178 | return mValid ? mLastLocation : null; |
| 179 | } |
| 180 | } |
| 181 | } |