Geolocation JSF
Do开发者_开发百科es anyone have an example of sending a geolocation from a mobile phone to a JSF backing bean?
Would like to get the customers address using geolocation? (Will need to convert from geolocation co-ordinates to a drop down list of nearby roads).
Thanks, D
Not sure if this will help u get started...
This pulls GPS Geolocation Data from Mobile Devices into a Form... Then do whatever with it from there...
<script type="text/javascript">
function getLocationConstant()
{
if(navigator.geolocation)
{
navigator.geolocation.getCurrentPosition(onGeoSuccess,onGeoError);
} else {
alert("Your browser or device doesn't support Geolocation");
}
}
// If we have a successful location update
function onGeoSuccess(event)
{
document.getElementById("Latitude").value = event.coords.latitude;
document.getElementById("Longitude").value = event.coords.longitude;
}
// If something has gone wrong with the geolocation request
function onGeoError(event)
{
alert("Error code " + event.code + ". " + event.message);
}
</script>
<cfform action="gps2.cfm" method="post">
Latitude: <input type="text" id="Latitude" name="Latitude" value="">
<br><br>
Longitude: <input type="text" id="Longitude" name="Longitude" value="">
<br><br>
<input type="button" value="Get Location" onclick="getLocationConstant()"/>
<br><br>
<input type="submit" value="Add GPS Location" class=small>
</cfform>
View this links please:
https://developers.google.com/maps/documentation/javascript/examples/map-geolocation - Google Developers
https://goo.gl/TD7aiq - JsFiddle
JS:
// Note: This example requires that you consent to location sharing when
// prompted by your browser. If you see the error "The Geolocation service
// failed.", it means you probably did not give permission for the browser to
// locate you.
function initMap() {
var map = new google.maps.Map(document.getElementById('map'), {
center: {lat: -34.397, lng: 150.644},
zoom: 6
});
var infoWindow = new google.maps.InfoWindow({map: map});
// Try HTML5 geolocation.
if (navigator.geolocation) {
navigator.geolocation.getCurrentPosition(function(position) {
var pos = {
lat: position.coords.latitude,
lng: position.coords.longitude
};
infoWindow.setPosition(pos);
infoWindow.setContent('Location found.');
map.setCenter(pos);
}, function() {
handleLocationError(true, infoWindow, map.getCenter());
});
} else {
// Browser doesn't support Geolocation
handleLocationError(false, infoWindow, map.getCenter());
}
}
function handleLocationError(browserHasGeolocation, infoWindow, pos) {
infoWindow.setPosition(pos);
infoWindow.setContent(browserHasGeolocation ?
'Error: The Geolocation service failed.' :
'Error: Your browser doesn\'t support geolocation.');
}
Using the Javascript you can get the co-ordinates and you can set the backend variable using document.getElementById("id")) in javascript.
Example:
<h:inputText value="{myBean.latitude}" id="latitudeID" />
<!DOCTYPE html>
<html>
<body>
<p>Click the button to get your coordinates.</p>
<button onclick="getLocation()">Try It</button>
<p id="demo"></p>
<script>
var x = document.getElementById("demo");
function getLocation() {
if (navigator.geolocation) {
navigator.geolocation.getCurrentPosition(showPosition);
} else {
x.innerHTML = "Geolocation is not supported by this browser.";
}
}
function showPosition(position) {
x.innerHTML = "Latitude: " + position.coords.latitude +
"<br>Longitude: " + position.coords.longitude;
document.getElementById("formName:latitudeID").value=position.coords.latitude; /* this will set the value in variable */
}
</script>
</body>
</html>
加载中,请稍侯......
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