根据下面的链接，我试图让用户能够单击地图以指定位置的谷歌地图，但我只看到一个空白屏幕： https ://developers.google.com/maps/articles/phpsqlinfo_v3
我根据此处的链接进行了一些更改，但没有更改： google maps v3 的 webview 显示空白屏幕
来自 Google Chrome 控制台的错误如下： Uncaught SyntaxError: Unexpected token < phpsqlinfo_add.html:33 Uncaught ReferenceError: initialize is not defined phpsqlinfo_add.html:123
代码中突出显示的适当行：
<!DOCTYPE html>
<!--
Copyright 2008 Google Inc.
Licensed under the Apache License, Version 2.0:
http://www.apache.org/licenses/LICENSE-2.0
-->
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta name="viewport" content="initial-scale=1.0, user-scalable=no" />
<meta http-equiv="content-type" content="text/html; charset=UTF-8"/>
<title>Saving User-Added Form Data Example</title>
<script type="text/javascript" src="http://maps.google.com/maps/api/js?sensor=false"></script>
<script type="text/javascript">
var marker;
var infowindow;
function initialize() {
var latlng = new google.maps.LatLng(37.4419, -122.1419);
var options = {
zoom: 13,
center: latlng,
mapTypeId: google.maps.MapTypeId.ROADMAP
}
google.maps.event.addDomListener(window, 'load', initialize);
var map = new google.maps.Map(document.getElementById("map_canvas"), options);
var html = "<table>" +
"<tr><td>Name:</td> <td><input type='text' id='name'/> </td> </tr>" +
"<tr><td>Email:</td> <td><input type='text' id='email'/></td> </tr>" +
"<tr><td>Phone:</td> <td><input type='text' id='phone'/></td> </tr>" +
"<tr><td>Town:</td> <td><input type='text' id='town'/></td> </tr>" +
"<tr><td>County:</td> <td><select id='county'>" +
**<option value='Outside Ireland' SELECTED>OutsideIreland</option> +**
<option value='Antrim' SELECTED>Antrim</option> +
<option value='Armagh' SELECTED>Armagh</option> +
<option value='Carlow' SELECTED>Carlow</option> +
<option value='Cavan' SELECTED>Cavan</option> +
<option value='Clare' SELECTED>Clare</option> +
<option value='Cork' SELECTED>Cork</option> +
<option value='Derry' SELECTED>Derry</option> +
<option value='Donegal' SELECTED>Donegal</option> +
<option value='Down' SELECTED>Down</option> +
<option value='Dublin' SELECTED>Dublin</option> +
<option value='Fermanagh' SELECTED>Fermanagh</option> +
<option value='Galway' SELECTED>Galway</option> +
<option value='Kerry' SELECTED>Kerry</option> +
<option value='Kildare' SELECTED>Kildare</option> +
<option value='Kilkenny' SELECTED>Kilkenny</option> +
<option value='Laois' SELECTED>Laois</option> +
<option value='Leitrim' SELECTED>Leitrim</option> +
<option value='Limerick' SELECTED>Limerick</option> +
<option value='Longford' SELECTED>Longford</option> +
<option value='Louth' SELECTED>Louth</option> +
<option value='Mayo' SELECTED>Mayo</option> +
<option value='Meath' SELECTED>Meath</option> +
<option value='Monaghan' SELECTED>Monaghan</option> +
<option value='Offaly' SELECTED>Offaly</option> +
<option value='Roscommon' SELECTED>Roscommon</option> +
<option value='Sligo' SELECTED>Sligo</option> +
<option value='Tipperary' SELECTED>Tipperary</option> +
<option value='Tyrone' SELECTED>Tyrone</option> +
<option value='Waterford' SELECTED>Waterford</option> +
<option value='Westmeath' SELECTED>Westmeath</option> +
<option value='Wexford' SELECTED>Wexford</option> +
<option value='Wicklow' SELECTED>Wicklow</option> +
"</select> </td></tr>" +
"<tr><td>Name of Location:</td> <td><input type='text' id='location'/></td> </tr>" +
"<tr><td></td><td><input type='button' value='Save & Close' onclick='saveData()'/></td></tr>";
infowindow = new google.maps.InfoWindow({
content: html
});
google.maps.event.addListener(map, "click", function(event) {
marker = new google.maps.Marker({
position: event.latLng,
map: map
});
google.maps.event.addListener(marker, "click", function() {
infowindow.open(map, marker);
});
});
}
function saveData() {
var name = escape(document.getElementById("name").value);
var address = escape(document.getElementById("address").value);
var type = document.getElementById("type").value;
var latlng = marker.getPosition();
var url = "phpsqlinfo_addrow.php?name=" + name + "&address=" + address +
"&type=" + type + "&lat=" + latlng.lat() + "&lng=" + latlng.lng();
downloadUrl(url, function(data, responseCode) {
if (responseCode == 200 && data.length <= 1) {
infowindow.close();
document.getElementById("message").innerHTML = "Location added.";
}
});
}
function downloadUrl(url, callback) {
var request = window.ActiveXObject ?
new ActiveXObject('Microsoft.XMLHTTP') :
new XMLHttpRequest;
request.onreadystatechange = function() {
if (request.readyState == 4) {
request.onreadystatechange = doNothing;
callback(request.responseText, request.status);
}
};
request.open('GET', url, true);
request.send(null);
}
function doNothing() {}
</script>
</head>
<body>
<div id="map_canvas" style="height: 100px; width=100px;"></div>
**<script type="text/javascript">initialize();</script>**
</body>
<!-- Commenting out line to edit suggestion from stackoverflow
<body style="margin:0px; padding:0px;" onload="initialize()">
<div id="map_canvas" style="width: 500px; height: 300px"></div>
<div id="message"></div>
</body> -->
</html>