/*
* Copyright 2012 Google Inc.
*
* 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.google.android.apps.mytracks.util;
import com.google.android.maps.mytracks.R;
import android.content.ContentResolver;
import android.content.Context;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.content.pm.ResolveInfo;
import android.database.Cursor;
import android.net.Uri;
import android.provider.Settings;
import android.util.Log;
/**
* Utilities for Google location settings
*
* @author Jimmy Shih
*/
public class GoogleLocationUtils {
private static final String TAG = GoogleLocationUtils.class.getSimpleName();
// Action to launch the google location settings
private static final String
ACTION_GOOGLE_LOCATION_SETTINGS = "com.google.android.gsf.GOOGLE_LOCATION_SETTINGS";
// Action to check if the google apps locations settings exists
private static final String
ACTION_GOOGLE_APPS_LOCATION_SETTINGS = "com.google.android.gsf.GOOGLE_APPS_LOCATION_SETTINGS";
// User has disagreed to use location for Google services
private static final int USE_LOCATION_FOR_SERVICES_OFF = 0;
// User has agreed to use location for Google services
public static final int USE_LOCATION_FOR_SERVICES_ON = 1;
/*
* The user has neither agreed nor disagreed to use location for Google
* services yet.
*/
private static final int USE_LOCATION_FOR_SERVICES_NOT_SET = 2;
private static final String GOOGLE_SETTINGS_AUTHORITY = "com.google.settings";
private static final Uri GOOGLE_SETTINGS_CONTENT_URI = Uri.parse(
"content://" + GOOGLE_SETTINGS_AUTHORITY + "/partner");
private static final String NAME = "name";
private static final String VALUE = "value";
private static final String USE_LOCATION_FOR_SERVICES = "use_location_for_services";
public static final Uri USE_LOCATION_FOR_SERVICES_URI = Uri.parse(
"content://" + GOOGLE_SETTINGS_AUTHORITY + "/partner/" + USE_LOCATION_FOR_SERVICES);
private GoogleLocationUtils() {}
/**
* Gets the gps disabled message.
*
* @param context the context
*/
public static String getGpsDisabledMessage(Context context) {
int id = ApiAdapterFactory.getApiAdapter().hasLocationMode() ? R.string.gps_disabled_location_mode
: R.string.gps_disabled;
return context.getString(id, getLocationSettingsName(context));
}
/**
* Gets the gps disabled message when my location button is pressed.
*
* @param context the context
*/
public static String getGpsDisabledMyLocationMessage(Context context) {
int id = ApiAdapterFactory.getApiAdapter().hasLocationMode() ? R.string.gps_disabled_my_location_location_mode
: R.string.gps_disabled_my_location;
return context.getString(id, getLocationSettingsName(context));
}
/**
* Creates a new location settings intent.
*
* @param context the context
*/
public static Intent newLocationSettingsIntent(Context context) {
Intent intent = new Intent(useGoogleLocationSettings(context) ? ACTION_GOOGLE_LOCATION_SETTINGS
: Settings.ACTION_LOCATION_SOURCE_SETTINGS);
intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
return intent;
}
/**
* Returns true if there is no enforcement or google location settings allows
* access.
*
* @param context the context
*/
public static boolean isAllowed(Context context) {
if (!isEnforceable(context)) {
return true;
}
if (!ApiAdapterFactory.getApiAdapter().hasLocationMode()) {
// Before KitKat
return getUseLocationForServices(context) == USE_LOCATION_FOR_SERVICES_ON;
} else {
// KitKat+
return getUseLocationForServices(context) != USE_LOCATION_FOR_SERVICES_OFF;
}
}
/**
* Gets the location settings name.
*
* @param context the context
*/
private static String getLocationSettingsName(Context context) {
return context.getString(
useGoogleLocationSettings(context) ? R.string.gps_google_location_settings
: R.string.gps_location_access);
}
/**
* Returns true to use the google location settings.
*
* @param context the context
*/
private static boolean useGoogleLocationSettings(Context context) {
if (!isEnforceable(context)) {
return false;
}
if (!ApiAdapterFactory.getApiAdapter().hasLocationMode()) {
// Before KitKat
return true;
} else {
// KitKat+
return getUseLocationForServices(context) == USE_LOCATION_FOR_SERVICES_OFF;
}
}
/**
* Returns true if the Google location settings is enforceable.
*/
private static boolean isEnforceable(Context context) {
Intent intent = new Intent(ACTION_GOOGLE_APPS_LOCATION_SETTINGS);
ResolveInfo resolveInfo = context.getPackageManager()
.resolveActivity(intent, PackageManager.MATCH_DEFAULT_ONLY);
return resolveInfo != null;
}
/**
* Get the current value for the 'Use value for location' setting.
*
* @return One of {@link #USE_LOCATION_FOR_SERVICES_NOT_SET},
* {@link #USE_LOCATION_FOR_SERVICES_OFF} or
* {@link #USE_LOCATION_FOR_SERVICES_ON}.
*/
private static int getUseLocationForServices(Context context) {
ContentResolver contentResolver = context.getContentResolver();
Cursor cursor = null;
String stringValue = null;
try {
cursor = contentResolver.query(GOOGLE_SETTINGS_CONTENT_URI, new String[] { VALUE },
NAME + "=?", new String[] { USE_LOCATION_FOR_SERVICES }, null);
if (cursor != null && cursor.moveToNext()) {
stringValue = cursor.getString(0);
}
} catch (RuntimeException e) {
Log.w(TAG, "Failed to get 'Use My Location' setting", e);
} finally {
if (cursor != null) {
cursor.close();
}
}
if (stringValue == null) {
return USE_LOCATION_FOR_SERVICES_NOT_SET;
}
int value;
try {
value = Integer.parseInt(stringValue);
} catch (NumberFormatException nfe) {
value = USE_LOCATION_FOR_SERVICES_NOT_SET;
}
return value;
}
}