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Posted to issues@cordova.apache.org by "Kuan Yi Ming (JIRA)" <ji...@apache.org> on 2013/04/17 18:01:17 UTC
[jira] [Created] (CB-3053) Geolocation API sometimes returns
outdated GPS coordinates when called after resume event
Kuan Yi Ming created CB-3053:
--------------------------------
Summary: Geolocation API sometimes returns outdated GPS coordinates when called after resume event
Key: CB-3053
URL: https://issues.apache.org/jira/browse/CB-3053
Project: Apache Cordova
Issue Type: Bug
Components: iOS
Affects Versions: 2.5.0, 2.6.0
Environment: iOS 6. Tested in simulator & iPhone 4
Reporter: Kuan Yi Ming
Assignee: Shazron Abdullah
On iOS, calling getCurrentPosition after resuming the app from the background sometimes will return the old coordinates from an earlier getCurrentPosition call prior to backgrounding the app.
Tested on simulator and on an iPhone 4.
On the simulator, this happens all the time. On a physical device, it can be replicated the first handful of calls but not after that (may have something to do with not getting GPS satellite lock right away?)
This is probably iOS specific as this can't be replicated whatsoever on a Galaxy Nexus with Location Services turned on, but GPS satellites are disabled.
Javascript code:
{quote}
function onBodyLoad() {
document.addEventListener("deviceready", onDeviceReady, false);
}
function onDeviceReady() {
document.addEventListener("resume", onResume, false);
navigator.geolocation.getCurrentPosition(onGetFollowMeSuccess, onGetFollowMeError);
}
function onResume() {
navigator.geolocation.getCurrentPosition(onGetFollowMeSuccess, onGetFollowMeError);
}
function onGetFollowMeSuccess(position) {
alert("Lat: " + position.coords.latitude + ", Long: " + position.coords.longitude);
}
function onGetFollowMeError() {
alert("Whoops-a-daisy.");
}
{quote}
HTML code:
{quote}
<!DOCTYPE html>
<html>
<head>
<title>Geo Loco</title>
<meta name="viewport" content="width=device-width, initial-scale=1, user-scalable=no" />
<meta charset="utf-8" />
<script type="text/javascript" charset="utf-8" src="cordova-2.6.0.js"></script>
<script type="text/javascript" charset="utf-8" src="main.js"></script>
</head>
<body onload="onBodyLoad()">
Geo Loco
</body>
</html>
{quote}
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