<!DOCTYPE html>
<html>
<head>
<title>GLANCE</title>
<meta charset="utf-8" />
<meta name="viewport" content="width=device-width, initial-scale=1" />
<style>
html,
body {
height: 100%;
margin: 0;
padding: 0;
}
#map {
height: 70%;
}
.controls {
margin-top: 10px;
border: 1px solid transparent;
border-radius: 2px 0 0 2px;
box-sizing: border-box;
-moz-box-sizing: border-box;
height: 32px;
outline: none;
box-shadow: 0 2px 6px rgba(0, 0, 0, 0.3);
}
#pac-input {
background-color: #000000;
font-family: Roboto;
font-size: 15px;
font-weight: 300;
margin-left: 12px;
padding: 0 11px 0 13px;
text-overflow: ellipsis;
width: 300px;
}
#pac-input:focus {
border-color: #4d90fe;
}
.pac-container {
font-family: Roboto;
}
#type-selector {
color: #000000;
background-color: #4d90fe;
padding: 5px 11px 0px 11px;
}
#type-selector label {
font-family: Roboto;
font-size: 13px;
font-weight: 300;
}
#target {
width: 345px;
}
</style>
</head>
<body>
<input id="pac-input" class="controls" type="text" placeholder="Digita Località">
<div id="map"></div>
<script>
// This example adds a search box to a map, using the Google Place Autocomplete
// feature. People can enter geographical searches. The search box will return a
// pick list containing a mix of places and predicted search terms.
// This example requires the Places library. Include the libraries=places
// parameter when you first load the API. For example:
// <script src="https://maps.googleapis.com/maps/api/js?key=YOUR_API_KEY&libraries=places">
var marker;
var xlat;
var xlon;
function initAutocomplete() {
var map = new google.maps.Map(document.getElementById('map'), {
center: {
lat: 44.689205,
lng: 10.663778
},
zoom: 14,
mapTypeId: google.maps.MapTypeId.ROADMAP
});
if (navigator.geolocation) {
navigator.geolocation.getCurrentPosition(function(position) {
initialLocation = new google.maps.LatLng(position.coords.latitude, position.coords.longitude);
map.setCenter(initialLocation);
xlat = position.coords.latitude;
xlon = position.coords.longitude;
marker = new google.maps.Marker({
icon: 'http://maps.google.com/mapfiles/ms/icons/green-dot.png',
map: map,
draggable: true,
animation: google.maps.Animation.DROP,
position: {
lat: position.coords.latitude,
lng: position.coords.longitude
}
});
marker.addListener('click', toggleBounce);
});
}
// Create the search box and link it to the UI element.
var input = document.getElementById('pac-input');
var searchBox = new google.maps.places.SearchBox(input);
map.controls[google.maps.ControlPosition.TOP_LEFT].push(input);
// Bias the SearchBox results towards current map's viewport.
map.addListener('bounds_changed', function() {
searchBox.setBounds(map.getBounds());
});
var markers = [];
// Listen for the event fired when the user selects a prediction and retrieve
// more details for that place.
searchBox.addListener('places_changed', function() {
var places = searchBox.getPlaces();
if (places.length == 0) {
return;
}
// Clear out the old markers.
markers.forEach(function(marker) {
marker.setMap(null);
});
markers = [];
// For each place, get the icon, name and location.
var bounds = new google.maps.LatLngBounds();
places.forEach(function(place) {
var icon = {
url: place.icon,
size: new google.maps.Size(71, 71),
origin: new google.maps.Point(0, 0),
anchor: new google.maps.Point(17, 34),
scaledSize: new google.maps.Size(25, 25)
};
// Create a marker for each place.
markers.push(new google.maps.Marker({
map: map,
draggable: true,
animation: google.maps.Animation.DROP,
position: place.geometry.location
// var xlat = place.geometry.location.lat();
// var xlon = place.geometry.location.lon();
}));
if (place.geometry.viewport) {
// Only geocodes have viewport.
bounds.union(place.geometry.viewport);
} else {
bounds.extend(place.geometry.location);
}
});
map.fitBounds(bounds);
});
}
function vai() {
window.location = "listadomande.jsp?lat=" + xlat + "&lon=" + xlon;
}
</script>
<script src="https://maps.googleapis.com/maps/api/js?key=AIzaSyDho6YqRH605Poc-S0AcShQu4hLYDUMGpk&libraries=places&callback=initAutocomplete" async defer></script>
<footer id="footer">
<br>
<ul class="actions">
<li>
<p onclick="vai()" class="button big">INVIA</p>
</li>
</ul>
</footer>
</body>
</html>
我成功找到了我命名为xlat＆amp; amp;的初始点的坐标。 xlon（地理定位），但是当我搜索另一个地方时，我不知道如何改变这个xlat和xlon。我尝试使用xlat = place.geometry.location.lat（）; xlon = place.geometry.location.lon（）;但当我把这些地图消失=（ {{3}}
`var marker;
var xlat;
var xlon;
function initAutocomplete() {
var map = new google.maps.Map(document.getElementById('map'), {
center: {lat: 44.689205, lng: 10.663778},
zoom: 14,
mapTypeId: google.maps.MapTypeId.ROADMAP
});
if (navigator.geolocation) {
navigator.geolocation.getCurrentPosition(function (position) {
initialLocation = new google.maps.LatLng(position.coords.latitude, position.coords.longitude);
map.setCenter(initialLocation);
xlat = position.coords.latitude;
xlon = position.coords.longitude;
marker = new google.maps.Marker({
icon: 'http://maps.google.com/mapfiles/ms/icons/green-dot.png',
map: map,
draggable: true,
animation: google.maps.Animation.DROP,
position: {lat: position.coords.latitude, lng: position.coords.longitude}
});
marker.addListener('click', toggleBounce);
});
}
// Create the search box and link it to the UI element.
var input = document.getElementById('pac-input');
var searchBox = new google.maps.places.SearchBox(input);
map.controls[google.maps.ControlPosition.TOP_LEFT].push(input);
// Bias the SearchBox results towards current map's viewport.
map.addListener('bounds_changed', function() {
searchBox.setBounds(map.getBounds());
});
var markers = [];
// Listen for the event fired when the user selects a prediction and retrieve
// more details for that place.
searchBox.addListener('places_changed', function() {
var places = searchBox.getPlaces();
if (places.length == 0) {
return;
}
// Clear out the old markers.
markers.forEach(function(marker) {
marker.setMap(null);
});
markers = [];
// For each place, get the icon, name and location.
var bounds = new google.maps.LatLngBounds();
places.forEach(function(place) {
var icon = {
url: place.icon,
size: new google.maps.Size(71, 71),
origin: new google.maps.Point(0, 0),
anchor: new google.maps.Point(17, 34),
scaledSize: new google.maps.Size(25, 25)
};
// Create a marker for each place.
markers.push(new google.maps.Marker({
map: map,
draggable: true,
animation: google.maps.Animation.DROP,
position: place.geometry.location
**xlat = place.geometry.location.lat();
xlon = place.geometry.location.lon();**
}));
if (place.geometry.viewport) {
// Only geocodes have viewport.
bounds.union(place.geometry.viewport);
} else {
bounds.extend(place.geometry.location);
}
});
map.fitBounds(bounds);
});
}
function go(){
window.location="get.jsp?lat="+xlat+"&lon="+xlon;
}`
答案 0 :(得分：1)
我认为这里的解决方案可能不是将xlat和xlong设置为Javascript代码中的变量，而是将它们作为隐藏元素包含在页面上，并在返回纬度和经度时设置值。因此，例如，在您的HTML代码中，放置类似这样的内容
<div id="xlat" data-attr-val="" ></div>
<div id="xlong" data-attr-val="" ></div>
然后当您返回经度和纬度值时，可以替换这些行
**xlat = place.geometry.location.lat();
xlon = place.geometry.location.lon();**
使用：
document.getElementById('xlat').setAttribute("data-attr-val", place.geometry.location.lat());
document.getElementById('xlong').setAttribute("data-attr-val", place.geometry.location.lon());
然后当你想调用函数vai（）时，你可以使用这个
function vai() {
lat = document.getElementById('xlat').getAttribute("data-attr-val");
lng = document.getElementById('xlng').getAttribute("data-attr-val");
window.location = "listadomande.jsp?lat=" + lat + "&lon=" + lng;
}
答案 1 :(得分：0)
此代码存在一些问题。请看这部分：
markers.push(new google.maps.Marker({
map: map,
draggable: true,
animation: google.maps.Animation.DROP,
position: place.geometry.location
var xlat = place.geometry.location.lat();
var xlon = place.geometry.location.lon();
}));
var。 lon()方法，它有lng()方法：https://developers.google.com/maps/documentation/javascript/reference?hl=en#LatLng 所以你的代码应该是
markers.push(new google.maps.Marker({
map: map,
draggable: true,
animation: google.maps.Animation.DROP,
position: place.geometry.location
}));
xlat = place.geometry.location.lat();
xlon = place.geometry.location.lng();