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/*
* Copyright (C) 2016 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.android.tv.util;
import android.content.Context;
import android.location.Address;
import android.location.Geocoder;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.os.Bundle;
import android.util.Log;
import java.io.IOException;
import java.util.List;
import java.util.Locale;
/**
* A utility class to get the current location.
*/
public class LocationUtils {
private static final String TAG = "LocationUtils";
private static final boolean DEBUG = false;
private static Context sApplicationContext;
private static Address sAddress;
private static IOException sError;
/**
* Checks the current location.
*/
public static synchronized Address getCurrentAddress(Context context) throws IOException,
SecurityException {
if (sAddress != null) {
return sAddress;
}
if (sError != null) {
throw sError;
}
if (sApplicationContext == null) {
sApplicationContext = context.getApplicationContext();
}
LocationUtilsHelper.startLocationUpdates();
return null;
}
private static void updateAddress(Location location) {
if (DEBUG) Log.d(TAG, "Updating address with " + location);
if (location == null) {
return;
}
Geocoder geocoder = new Geocoder(sApplicationContext, Locale.getDefault());
try {
List<Address> addresses = geocoder.getFromLocation(
location.getLatitude(), location.getLongitude(), 1);
if (addresses != null) {
sAddress = addresses.get(0);
if (DEBUG) Log.d(TAG, "Got " + sAddress);
} else {
if (DEBUG) Log.d(TAG, "No address returned");
}
sError = null;
} catch (IOException e) {
Log.w(TAG, "Error in updating address", e);
sError = e;
}
}
private LocationUtils() { }
private static class LocationUtilsHelper {
private static final LocationListener LOCATION_LISTENER = new LocationListener() {
@Override
public void onLocationChanged(Location location) {
updateAddress(location);
}
@Override
public void onStatusChanged(String provider, int status, Bundle extras) { }
@Override
public void onProviderEnabled(String provider) { }
@Override
public void onProviderDisabled(String provider) { }
};
private static LocationManager sLocationManager;
public static void startLocationUpdates() {
if (sLocationManager == null) {
sLocationManager = (LocationManager) sApplicationContext.getSystemService(
Context.LOCATION_SERVICE);
try {
sLocationManager.requestLocationUpdates(
LocationManager.NETWORK_PROVIDER, 1000, 10, LOCATION_LISTENER, null);
} catch (SecurityException e) {
// Enables requesting the location updates again.
sLocationManager = null;
throw e;
}
}
}
}
}
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