Keywords: Android/GPS/geocoding API/getlocationfrom () return null
I plan to develop a program for address location resolution. The following methods are widely used on the Internet:
The getfromlocation () and getfromlocationname () functions are quite popular and informative.
For details, see the following link:
Geographic and anti-encoding of Android maps:
Http://www.eoeandroid.com/thread-63307-1-1.html
Error descriptionTo the enterprise to do the app embedded in the use of GPS address information into the actual address of the function, using the Baidu map of the geocoding function, from the beginning of Wednesday, there have been user feedback, using the location can not obtain address information error, a small range, it is the user's own problems, no care , but in the Thursday, it began to explode in large areas;Solution to find out whether the B
Geocoding API is a service interface provided by Baidu. It is mainly used to provide translation services from address resolution to latitude and longitude coordinates or from latitude and longitude coordinates to addresses, you can send a request to receive returned data in JSON or XML format.
Most of the code and solutions provided on the Internet are based on Google map. In fact, their solutions are simi
It is now often necessary to provide some information about location based on the location provided by the user. Sometimes you can directly determine the latitude and longitude of the user, sometimes not necessarily determine the user's latitude and longitude information, the user is through the input of some road name, landmark building or store name location, but our database may not be stored in the user may enter the latitude of these location information, At this point you can use some map-
: parse the JSON string
// Parse the root element to obtain an array jsonarray jsonobjs = new jsonobject (STR ). getjsonarray ("Results"); // retrieves the first JSON object in the array (in this example, the array actually contains only one element). jsonobject jsonobj = jsonobjs. getjsonobject (0); // parses the formatted_address value string address = jsonobj. getstring ("formatted_address"); // parse the geometry jsonobject geometry = jsonobj in the json object. getjsonobject ("Geometry"); /
=longitude , QS can become the following three kinds of forms:
Location=latitudelocation=longitude
Location[0]=latitudelocation[1]=longitude
Location[]=latitudelocation[]=longitude
are not in line with the Baidu Map API interface requirements.If you want to avoid the trouble of string connection, using the String-format library is also very convenient, but the URL will also knock very long, it is better to use the QueryString lib
Step 1: Construct the URL required by the Geocoder APIURL formatHttps://maps.googleapis.com/maps/api/geocode/output? ParametersThe output option is json/xml, and the parameters option is address/language/sensor.URL exampleHttps://maps.googleapis.com/maps/api/geocode/json? Address = Beijing Tiananmen language = zh_CN sensor = falseStep 2: Send an Http request to the AP
map of Baidu--geo-coding and anti-geocoding
One Goal,one Passion!
Geocoding:
Geocoding--that is, we parse the familiar address into latitude.
Address
latlng (coordinate)
Zhengzhou
34.7568711, 113.663221
Okay, the code is simple.
New coded Query Object
GeoCoder geocode = Geocoder.newinstance ();
New Query
I. Clgeocoder geocoding and geo-coding
地理编码:
Obtain specific location information (such as latitude and longitude, the full name of the address, etc.) based on the given place name
// geo-coding methods -(void) Geocodeaddressstring: (nsstring*) Addressstringcompletionhandler: (Clgeocodecompletionhandler) Completionhandler;
Anti-geocoding:
Obtain specific location informatio
First, the basic conceptGeocoding: Obtain specific location information (such as latitude and longitude, full name of address, etc.) based on a given place nameAnti-geocoding: Obtain specific location information based on a given latitude and longitudeEach instance of the encoder clgeocoder, while processing only one task, executes asynchronously.Ii. Basic Methods1. Geocoding Methods-(void) geocodeaddressst
When we want to implement the function in the app: Enter place name, code for latitude and longitude, realize navigation function. So, I need to use the Geocoding feature in the native map, and in the core location, it includes the positioning, geocoding (including the anti-coding) feature.Import in File#import Geocoding:/**
How to use Python to implement geocoding take the logistics industry as an example. This paper analyzes the logistics industry application methods of PostgreSQL and Greenplum in terms of geographical location information processing, optimal path algorithm, and machine learning. I mentioned the problem of converting addresses into Coordinates. the more professional term should be "geographic code", that is, knowing an address, such as No. 10, Shangdi 1
: {Lat: 23.730996999999999, LNG: 39.902343999999999}, maptype: ""},Resolvedpoiid: True,Modules: [""],Overlays: {sxcar: false },Panel: "The route is being calculated. Please wait ......",Panelstyle: "",Panelid: 0,Printheader: "...",Addressbook :{......},Signed_in: True}, "State ");}
In this code, you can also use the mapabc code "mabc_saddr:" be0000020f "and mabc_daddr:" be000005cb "obtained from geocoding "". Next we will use another interface http:/
Map-02. geocoding (geocoding/reversegeocoding)The previous section gives you a brief introduction to getting the user's location, using latitude and longitude to represent the location. Let's talk about geocoding in this section.First, we need to know what geocoding isConcept:Geocoding: Refers to the process of establi
A simple explanationClgeocoder: Geo Encoder, where Geo is a shorthand for geographic English word geography.1. Use Clgeocoder to complete the geocoding and anti-geocoding geocoding : Obtain specific location information (such as latitude and longitude, full name of address, etc.) based on a given place nameanti-geocoding
---restore content starts---Basic Android itself with the Geocoder this class can also be achieved for the latitude and longitude of the positive and negative Yi, but its own bugs exist a lot, especially in the stability of the resolution here, Google provides geocoding stability more good, although its usage is a little more complex, In fact, its general working principle is the HTTP protocol, Google has an open interface, we will be the latitude and
The so-called geocoding refers to acquiring location information through place names, such as latitude and longitude, detailed addresses, and so on.The so-called anti-geo-coding, refers to the latitude and longitude, altitude and other information to obtain geographical location information.The use of geocoding and anti-geocoding on iOS, if the manual input latit
Have to say, now the Baidu lbs Department is not no one, ah, sometimes make out some bad things to use Baidu to do the inverse of the geocoding function, is sure to start the Baidu service first, these will no longer rip. Bmkgeocodesearch *_geocodesearch = [[Bmkgeocodesearch alloc]init]; _geocodesearch.delegate = self;Bmkreversegeocodeoption *reversegeocodeoption= [[Bmkreversegeocodeoption alloc] init];Reversegeocodeoption.reversegeopoint = cllocation
1. geocoding Tools (Geocoding tools) Locator ProductionOpen Arccatalog and find the Toolbox Arctoolbox geocoding Tools---Create Address Locator with the following interface:2, locator has been completed, the next is to publish the Geocoding serviceRight-click the Locator tool and select Share as---Geocode Service with
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