ANDROID_MARS学习笔记_S03_006_geocoding、HttpClient

一、简介

二、代码
1.xml
(1)AndroidManifest.xml

     <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>
     <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"/>
     <uses-permission android:name="android.permission.INTERNET"/>

2.java
(1)MainActivity.java

 package com.location4;

 import java.io.BufferedReader;
 import java.io.IOException;
 import java.io.InputStreamReader;

 import org.apache.http.HttpEntity;
 import org.apache.http.HttpResponse;
 import org.apache.http.client.ClientProtocolException;
 import org.apache.http.client.HttpClient;
 import org.apache.http.client.methods.HttpGet;
 import org.apache.http.impl.client.DefaultHttpClient;

 import android.annotation.SuppressLint;
 import android.app.Activity;
 import android.os.Bundle;
 import android.os.StrictMode;
 import android.view.View;
 import android.view.View.OnClickListener;
 import android.widget.Button;

 import com.google.gson.Gson;

 /**
  * 根据地址查询经纬度：
  * http://maps.google.com/maps/api/geocode/json?address=SFO&sensor=false
  *
  * 根据经纬度查询地址：
  * http://maps.google.com/maps/api/geocode/json?latlng=40.124356,-73.961472&sensor=false
  *
  * bounds的作用：在指定的经纬度范围内查询
  * http://maps.google.com/maps/api/geocode/json?address=SFO & bounds=39.125367,-118.326182|42.271635,-40.287321 & sensor=false
  *
  * region的作用：在给定国家代码的国家中查询（es：西班牙）
  * http://maps.google.com/maps/api/geocode/json?address=Toledo&sensor=false&region=es
  */

 @SuppressLint("NewApi")
 public class MainActivity extends Activity {

     private Button geocodingButton = null;

     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_main);
         if (android.os.Build.VERSION.SDK_INT > 9) {
             StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder().permitAll().build();
             StrictMode.setThreadPolicy(policy);
         }

         geocodingButton = (Button)findViewById(R.id.geoButton);
         geocodingButton.setOnClickListener(new OnClickListener() {
             @Override
             public void onClick(View v) {
                 //针对上一节中Geocoder服务不可用的情况，此处使用google maps中的服务替代
                 //String url = "http://maps.google.com/maps/api/geocode/json?address=SFO&sensor=false";
                 String url = "http://maps.google.com/maps/api/geocode/json?latlng=40.124356,-73.961472&sensor=false";
                 HttpClient client = new DefaultHttpClient();
                 StringBuilder responseData = new StringBuilder("");
                 try {
                     //向指定的url发送http请求
                     HttpResponse response = client.execute(new HttpGet(url));
                     //取得服务器返回的响应
                     HttpEntity entity = response.getEntity();
                     BufferedReader reader = new BufferedReader(new InputStreamReader(entity.getContent()));
                     String line = "";
                     while((line = reader.readLine()) != null) {
                         responseData.append(line);
                     }
                 } catch (ClientProtocolException e) {
                     e.printStackTrace();
                 } catch (IOException e) {
                     e.printStackTrace();
                 }
                 Gson gson = new Gson();
                 GeoResult geoResult = gson.fromJson(responseData.toString(), GeoResult.class);
                 System.out.println(responseData);
                 System.out.println(geoResult);
             }
         });
     }
 }

(2)GeoResult.java

 package com.location4;

 import java.util.List;

 public class GeoResult {

     private String status;
     private List<Result> results;
     public String getStatus() {
         return status;
     }
     public void setStatus(String status) {
         this.status = status;
     }
     public List<Result> getResults() {
         return results;
     }
     public void setResults(List<Result> results) {
         this.results = results;
     }
     @Override
     public String toString() {
         return "GeoResult [status=" + status + ", results=" + results + "]";
     }
 }

(3)Result.java

 package com.location4;

 import java.util.Arrays;

 public class Result {

     private String[] types;
     private String formatted_address;
     private String place_id;
     public String getPlace_id() {
         return place_id;
     }
     public void setPlace_id(String place_id) {
         this.place_id = place_id;
     }
     public String[] getTypes() {
         return types;
     }
     public void setTypes(String[] types) {
         this.types = types;
     }
     public String getFormatted_address() {
         return formatted_address;
     }
     public void setFormatted_address(String formatted_address) {
         this.formatted_address = formatted_address;
     }
     @Override
     public String toString() {
         return "Result [types=" + Arrays.toString(types)
                 + ", formatted_address=" + formatted_address + ", place_id="
                 + place_id + "]";
     }
 }

(4)http://maps.google.com/maps/api/geocode/json?latlng=40.124356,-73.961472&sensor=false

和http://maps.google.com/maps/api/geocode/xml?latlng=40.124356,-73.961472&sensor=false的返回结果分别如下：

 {
    "results" : [
       {
          "address_components" : [
             {
                "long_name" : "511",
                "short_name" : "511",
                "types" : [ "street_number" ]
             },
             {
                "long_name" : "Ocean Avenue",
                "short_name" : "Ocean Ave",
                "types" : [ "route" ]
             },
             {
                "long_name" : "Sea Girt",
                "short_name" : "Sea Girt",
                "types" : [ "locality", "political" ]
             },
             {
                "long_name" : "Monmouth County",
                "short_name" : "Monmouth County",
                "types" : [ "administrative_area_level_2", "political" ]
             },
             {
                "long_name" : "New Jersey",
                "short_name" : "NJ",
                "types" : [ "administrative_area_level_1", "political" ]
             },
             {
                "long_name" : "美国",
                "short_name" : "US",
                "types" : [ "country", "political" ]
             },
             {
                "long_name" : "08750",
                "short_name" : "08750",
                "types" : [ "postal_code" ]
             },
             {
                "long_name" : "2712",
                "short_name" : "2712",
                "types" : [ "postal_code_suffix" ]
             }
          ],
          "formatted_address" : "511 Ocean Ave, Sea Girt, NJ 08750美国",
          "geometry" : {
             "location" : {
                "lat" : 40.131507,
                "lng" : -74.028998
             },
             "location_type" : "ROOFTOP",
             "viewport" : {
                "northeast" : {
                   "lat" : 40.1328559802915,
                   "lng" : -74.02764901970851
                },
                "southwest" : {
                   "lat" : 40.1301580197085,
                   "lng" : -74.03034698029151
                }
             }
          },
          "place_id" : "ChIJSUENuniIwYkRm9pgGolNa2s",
          "types" : [ "street_address" ]
       },
       {
          "address_components" : [
             {
                "long_name" : "美国",
                "short_name" : "US",
                "types" : [ "country", "political" ]
             }
          ],
          "formatted_address" : "美国",
          "geometry" : {
             "bounds" : {
                "northeast" : {
                   "lat" : 71.3867745,
                   "lng" : -66.9502861
                },
                "southwest" : {
                   "lat" : 18.9106768,
                   "lng" : 172.4458955
                }
             },
             "location" : {
                "lat" : 37.09024,
                "lng" : -95.712891
             },
             "location_type" : "APPROXIMATE",
             "viewport" : {
                "northeast" : {
                   "lat" : 49.38,
                   "lng" : -66.94
                },
                "southwest" : {
                   "lat" : 25.82,
                   "lng" : -124.39
                }
             }
          },
          "place_id" : "ChIJCzYy5IS16lQRQrfeQ5K5Oxw",
          "types" : [ "country", "political" ]
       }
    ],
    "status" : "OK"
 }

 <GeocodeResponse>
     <status>OK</status>
     <result>
         <type>street_address</type>
         <formatted_address>511 Ocean Ave, Sea Girt, NJ 08750美国</formatted_address>
         <address_component>
             <long_name>511</long_name>
             <short_name>511</short_name>
             <type>street_number</type>
         </address_component>
         <address_component>
             <long_name>Ocean Avenue</long_name>
             <short_name>Ocean Ave</short_name>
             <type>route</type>
         </address_component>
         <address_component>
             <long_name>Sea Girt</long_name>
             <short_name>Sea Girt</short_name>
             <type>locality</type>
             <type>political</type>
         </address_component>
         <address_component>
             <long_name>Monmouth County</long_name>
             <short_name>Monmouth County</short_name>
             <type>administrative_area_level_2</type>
             <type>political</type>
         </address_component>
         <address_component>
             <long_name>New Jersey</long_name>
             <short_name>NJ</short_name>
             <type>administrative_area_level_1</type>
             <type>political</type>
         </address_component>
         <address_component>
             <long_name>美国</long_name>
             <short_name>US</short_name>
             <type>country</type>
             <type>political</type>
         </address_component>
         <address_component>
             <long_name>08750</long_name>
             <short_name>08750</short_name>
             <type>postal_code</type>
         </address_component>
         <address_component>
             <long_name>2712</long_name>
             <short_name>2712</short_name>
             <type>postal_code_suffix</type>
         </address_component>
         <geometry>
             <location>
                 <lat>40.1315070</lat>
                 <lng>-74.0289980</lng>
             </location>
             <location_type>ROOFTOP</location_type>
             <viewport>
                 <southwest>
                     <lat>40.1301580</lat>
                     <lng>-74.0303470</lng>
                 </southwest>
                 <northeast>
                     <lat>40.1328560</lat>
                     <lng>-74.0276490</lng>
                 </northeast>
             </viewport>
         </geometry>
         <place_id>ChIJSUENuniIwYkRm9pgGolNa2s</place_id>
     </result>
     <result>
         <type>country</type>
         <type>political</type>
         <formatted_address>美国</formatted_address>
         <address_component>
             <long_name>美国</long_name>
             <short_name>US</short_name>
             <type>country</type>
             <type>political</type>
         </address_component>
         <geometry>
             <location>
                 <lat>37.0902400</lat>
                 <lng>-95.7128910</lng>
             </location>
             <location_type>APPROXIMATE</location_type>
             <viewport>
                 <southwest>
                     <lat>25.8200000</lat>
                     <lng>-124.3900000</lng>
                 </southwest>
                 <northeast>
                     <lat>49.3800000</lat>
                     <lng>-66.9400000</lng>
                 </northeast>
             </viewport>
             <bounds>
                 <southwest>
                     <lat>18.9106768</lat>
                     <lng>172.4458955</lng>
                 </southwest>
                 <northeast>
                     <lat>71.3867745</lat>
                     <lng>-66.9502861</lng>
                 </northeast>
             </bounds>
         </geometry>
         <place_id>ChIJCzYy5IS16lQRQrfeQ5K5Oxw</place_id>
     </result>
 </GeocodeResponse>