navigator.geolocation.watchPosition
http://stackoverflow.com/questions/24019286/navigator-geolocation-watchposition-frequency
You code seems to be working fine: http://jsfiddle.net/Mgk9J/1/
I tested it in Android and when I move the cellphone new lines came up. However in chrome desktop it plots new lines when I change tabs even though they're identical to the last ones, according to the spec this isn't the correctly behavior.
It makes a bit of sense for the desktop version do not plot new lines anyway, the computer isn't moving so new success calbacks execution should not be fired.
<script type="text/javascript">//<![CDATA[
window.onload=function(){
var watchID = null;
// PhoneGap is ready
//
function f() {
// Update every 1 ms seconds
var options = {enableHighAccuracy: true,timeout: 5000,maximumAge: 0,desiredAccuracy: 0, frequency: 1 };
watchID = navigator.geolocation.watchPosition(onSuccess, onError, options);
}
// onSuccess Geolocation
//
function onSuccess(position) {
var str = 'Latitude: ' + position.coords.latitude + '<br>' +
'Longitude: ' + position.coords.longitude + '<br>' +
'Timestamp: ' + position.timestamp + '<br>\r\n' ;
document.getElementById('result').value += str;
}
// clear the watch that was started earlier
//
function clearWatch() {
if (watchID != null) {
navigator.geolocation.clearWatch(watchID);
watchID = null;
}
}
// onError Callback receives a PositionError object
//
function onError(error) {
alert('code: ' + error.code + '\n' +
'message: ' + error.message + '\n');
}
document.getElementById('button').addEventListener('click', f);
}//]]>
</script>
</head>
<body>
<p id="geolocation">Watching geolocation...</p>
<button id="button"> Watch</button>
<textarea id="result" cols="100" rows="10"></textarea>
</body></html>반응형
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