我正在尝试编写一些从地址获取位置的java代码。 （不是在Android环境中。）
如果可能，只要Google以某种方式提供地理位置服务，我希望它是永久性的。
我想我不能说Google javascript地理位置apis使用永久URL来执行此操作，因为api的Object将在运行时来自Google服务器。
但是我认为Android可能会使用永久性网址来实现这一点，因为Google无法更改设备获取地理定位服务的每个设备的网址。
我错了吗？ 谷歌的政策是否涉及到它？
提前致谢。
答案 0 :(得分：1)
您可以尝试使用Google HTTP API获取地理编码和反向地理编码。
地理编码请求
地理编码API请求必须采用以下格式：
http://maps.googleapis.com/maps/api/geocode/output?parameters
其中输出可以是以下值之一：
json（推荐）表示JavaScript Object Notation（JSON）中的输出 xml表示输出为XML
请点击此链接获取更多信息：https://developers.google.com/maps/documentation/geocoding/
答案 1 :(得分：1)
如果您打算使用Google GeoCoding，那么这些内容对您有用：
地理编码API请求必须采用以下格式：
http://maps.googleapis.com/maps/api/geocode/output?parameters
其中输出可以是以下值之一：
json (recommended) indicates output in JavaScript Object Notation (JSON)
xml indicates output as XML
要通过HTTPS访问地理编码API，请使用：
https://maps.googleapis.com/maps/api/geocode/output?parameters
对于在请求中包含敏感用户数据（例如用户位置）的应用程序，建议使用HTTPS。
在任何一种情况下，都需要某些参数，而有些参数是可选的。作为URL中的标准，所有参数都使用＆符号（＆amp;）分隔。参数列表及其可能的值列举如下。
必填参数
address — The address that you want to geocode.
or
latlng — The textual latitude/longitude value for which you wish to obtain the closest, human-readable address. See Reverse Geocoding for more information.
or
components — A component filter for which you wish to obtain a geocode. See Component Filtering for more information. The components filter will also be accepted as an optional parameter if an address is provided.
sensor — Indicates whether or not the geocoding request comes from a device with a location sensor. This value must be either true or false.
Maps API for Business用户必须在其地理编码请求中包含有效的客户端和签名参数。有关详细信息，请参阅Maps API for Business Web Services。
可选参数
bounds — The bounding box of the viewport within which to bias geocode results more prominently. This parameter will only influence, not fully restrict, results from the geocoder. (For more information see Viewport Biasing below.)
language — The language in which to return results. See the list of supported domain languages. Note that we often update supported languages so this list may not be exhaustive. If language is not supplied, the geocoder will attempt to use the native language of the domain from which the request is sent wherever possible.
region — The region code, specified as a ccTLD ("top-level domain") two-character value. This parameter will only influence, not fully restrict, results from the geocoder. (For more information see Region Biasing below.)
components — The component filters, separated by a pipe (|). Each component filter consists of a component:value pair and will fully restrict the results from the geocoder. For more information see Component Filtering, below.
JSON输出格式
在此示例中，地理编码API为“1600 Amphitheatre Parkway，Mountain View，CA”上的查询请求json响应：
我们在此示例中将sensor参数保留为变量true_or_false，以强调您必须将此值明确设置为true或false。
此请求返回的JSON如下所示。请注意，实际的JSON可能包含较少的空格。您不应该对请求之间的空格数量或格式做出假设。
{
"results" : [
{
"address_components" : [
{
"long_name" : "1600",
"short_name" : "1600",
"types" : [ "street_number" ]
},
{
"long_name" : "Amphitheatre Pkwy",
"short_name" : "Amphitheatre Pkwy",
"types" : [ "route" ]
},
{
"long_name" : "Mountain View",
"short_name" : "Mountain View",
"types" : [ "locality", "political" ]
},
{
"long_name" : "Santa Clara",
"short_name" : "Santa Clara",
"types" : [ "administrative_area_level_2", "political" ]
},
{
"long_name" : "California",
"short_name" : "CA",
"types" : [ "administrative_area_level_1", "political" ]
},
{
"long_name" : "United States",
"short_name" : "US",
"types" : [ "country", "political" ]
},
{
"long_name" : "94043",
"short_name" : "94043",
"types" : [ "postal_code" ]
}
],
"formatted_address" : "1600 Amphitheatre Pkwy, Mountain View, CA 94043, USA",
"geometry" : {
"location" : {
"lat" : 37.42291810,
"lng" : -122.08542120
},
"location_type" : "ROOFTOP",
"viewport" : {
"northeast" : {
"lat" : 37.42426708029149,
"lng" : -122.0840722197085
},
"southwest" : {
"lat" : 37.42156911970850,
"lng" : -122.0867701802915
}
}
},
"types" : [ "street_address" ]
}
],
"status" : "OK"
}
以下是一些示例代码，可帮助您获取纬度和经度：
public static void main(String[] args) {
try
{
URL url = new URL("http://maps.googleapis.com/maps/api/geocode/json?address=1600+Amphitheatre+Parkway,+Mountain+View,+CA&sensor=false");
URLConnection conn = url.openConnection();
conn.connect();
InputStreamReader isr = new InputStreamReader(conn.getInputStream());
StringBuffer sbLocation = new StringBuffer();
for (int i=0; i != -1; i = isr.read())
{
sbLocation.append((char)i);
}
String getContent = sbLocation.toString().trim();
if(getContent.contains("results"))
{
String temp = getContent.substring(getContent.indexOf("["));
JSONArray JSONArrayForAll = new JSONArray(temp);
String lng = JSONArrayForAll.getJSONObject(0).getJSONObject("geometry").getJSONObject("location").get("lng").toString();
String lat = JSONArrayForAll.getJSONObject(0).getJSONObject("geometry").getJSONObject("location").get("lat").toString();
System.out.println(" Latitude : " + lat);
System.out.println(" Longitude : " + lng);
}
}
catch (MalformedURLException e)
{
e.printStackTrace();
}
catch (IOException e)
{
e.printStackTrace();
}
}