ANDROID_MARS学习笔记_S03_006_geocoding、HttpClient

一、简介

二、代码
1.xml
(1)AndroidManifest.xml

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

2.java
(1)MainActivity.java

 1 package com.location4;
 2 
 3 import java.io.BufferedReader;
 4 import java.io.IOException;
 5 import java.io.InputStreamReader;
 6 
 7 import org.apache.http.HttpEntity;
 8 import org.apache.http.HttpResponse;
 9 import org.apache.http.client.ClientProtocolException;
10 import org.apache.http.client.HttpClient;
11 import org.apache.http.client.methods.HttpGet;
12 import org.apache.http.impl.client.DefaultHttpClient;
13 
14 import android.annotation.SuppressLint;
15 import android.app.Activity;
16 import android.os.Bundle;
17 import android.os.StrictMode;
18 import android.view.View;
19 import android.view.View.OnClickListener;
20 import android.widget.Button;
21 
22 import com.google.gson.Gson;
23 
24 /**
25  * 根据地址查询经纬度：
26  * http://maps.google.com/maps/api/geocode/json?address=SFO&sensor=false
27  *
28  * 根据经纬度查询地址：
29  * http://maps.google.com/maps/api/geocode/json?latlng=40.124356,-73.961472&sensor=false
30  *
31  * bounds的作用：在指定的经纬度范围内查询
32  * http://maps.google.com/maps/api/geocode/json?address=SFO & bounds=39.125367,-118.326182|42.271635,-40.287321 & sensor=false
33  *
34  * region的作用：在给定国家代码的国家中查询（es：西班牙）
35  * http://maps.google.com/maps/api/geocode/json?address=Toledo&sensor=false&region=es
36  */
37 
38 @SuppressLint("NewApi")
39 public class MainActivity extends Activity {
40 
41     private Button geocodingButton = null;
42     
43     @Override
44     protected void onCreate(Bundle savedInstanceState) {
45         super.onCreate(savedInstanceState);
46         setContentView(R.layout.activity_main);
47         if (android.os.Build.VERSION.SDK_INT > 9) {
48             StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder().permitAll().build();
49             StrictMode.setThreadPolicy(policy);
50         }
51         
52         geocodingButton = (Button)findViewById(R.id.geoButton);
53         geocodingButton.setOnClickListener(new OnClickListener() {
54             @Override
55             public void onClick(View v) {
56                 //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
57                 //String url = "http://maps.google.com/maps/api/geocode/json?address=SFO&sensor=false";
58                 String url = "http://maps.google.com/maps/api/geocode/json?latlng=40.124356,-73.961472&sensor=false";
59                 HttpClient client = new DefaultHttpClient();
60                 StringBuilder responseData = new StringBuilder("");
61                 try {
62                     //向指定的url发送http请求
63                     HttpResponse response = client.execute(new HttpGet(url));
64                     //取得服务器返回的响应
65                     HttpEntity entity = response.getEntity();
66                     BufferedReader reader = new BufferedReader(new InputStreamReader(entity.getContent()));
67                     String line = "";
68                     while((line = reader.readLine()) != null) {
69                         responseData.append(line);
70                     }
71                 } catch (ClientProtocolException e) {
72                     e.printStackTrace();
73                 } catch (IOException e) {
74                     e.printStackTrace();
75                 }
76                 Gson gson = new Gson();
77                 GeoResult geoResult = gson.fromJson(responseData.toString(), GeoResult.class);
78                 System.out.println(responseData);
79                 System.out.println(geoResult);
80             }
81         });
82     }
83 }

(2)GeoResult.java

 1 package com.location4;
 2 
 3 import java.util.List;
 4 
 5 public class GeoResult {
 6 
 7     private String status;
 8     private List<Result> results;
 9     public String getStatus() {
10         return status;
11     }
12     public void setStatus(String status) {
13         this.status = status;
14     }
15     public List<Result> getResults() {
16         return results;
17     }
18     public void setResults(List<Result> results) {
19         this.results = results;
20     }
21     @Override
22     public String toString() {
23         return "GeoResult [status=" + status + ", results=" + results + "]";
24     }
25 }

(3)Result.java

 1 package com.location4;
 2 
 3 import java.util.Arrays;
 4 
 5 public class Result {
 6 
 7     private String[] types;
 8     private String formatted_address;
 9     private String place_id;
10     public String getPlace_id() {
11         return place_id;
12     }
13     public void setPlace_id(String place_id) {
14         this.place_id = place_id;
15     }
16     public String[] getTypes() {
17         return types;
18     }
19     public void setTypes(String[] types) {
20         this.types = types;
21     }
22     public String getFormatted_address() {
23         return formatted_address;
24     }
25     public void setFormatted_address(String formatted_address) {
26         this.formatted_address = formatted_address;
27     }
28     @Override
29     public String toString() {
30         return "Result [types=" + Arrays.toString(types)
31                 + ", formatted_address=" + formatted_address + ", place_id="
32                 + place_id + "]";
33     }
34 }

(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：

  1 {
  2    "results" : [
  3       {
  4          "address_components" : [
  5             {
  6                "long_name" : "511",
  7                "short_name" : "511",
  8                "types" : [ "street_number" ]
  9             },
 10             {
 11                "long_name" : "Ocean Avenue",
 12                "short_name" : "Ocean Ave",
 13                "types" : [ "route" ]
 14             },
 15             {
 16                "long_name" : "Sea Girt",
 17                "short_name" : "Sea Girt",
 18                "types" : [ "locality", "political" ]
 19             },
 20             {
 21                "long_name" : "Monmouth County",
 22                "short_name" : "Monmouth County",
 23                "types" : [ "administrative_area_level_2", "political" ]
 24             },
 25             {
 26                "long_name" : "New Jersey",
 27                "short_name" : "NJ",
 28                "types" : [ "administrative_area_level_1", "political" ]
 29             },
 30             {
 31                "long_name" : "美国",
 32                "short_name" : "US",
 33                "types" : [ "country", "political" ]
 34             },
 35             {
 36                "long_name" : "08750",
 37                "short_name" : "08750",
 38                "types" : [ "postal_code" ]
 39             },
 40             {
 41                "long_name" : "2712",
 42                "short_name" : "2712",
 43                "types" : [ "postal_code_suffix" ]
 44             }
 45          ],
 46          "formatted_address" : "511 Ocean Ave, Sea Girt, NJ 08750美国",
 47          "geometry" : {
 48             "location" : {
 49                "lat" : 40.131507,
 50                "lng" : -74.028998
 51             },
 52             "location_type" : "ROOFTOP",
 53             "viewport" : {
 54                "northeast" : {
 55                   "lat" : 40.1328559802915,
 56                   "lng" : -74.02764901970851
 57                },
 58                "southwest" : {
 59                   "lat" : 40.1301580197085,
 60                   "lng" : -74.03034698029151
 61                }
 62             }
 63          },
 64          "place_id" : "ChIJSUENuniIwYkRm9pgGolNa2s",
 65          "types" : [ "street_address" ]
 66       },
 67       {
 68          "address_components" : [
 69             {
 70                "long_name" : "美国",
 71                "short_name" : "US",
 72                "types" : [ "country", "political" ]
 73             }
 74          ],
 75          "formatted_address" : "美国",
 76          "geometry" : {
 77             "bounds" : {
 78                "northeast" : {
 79                   "lat" : 71.3867745,
 80                   "lng" : -66.9502861
 81                },
 82                "southwest" : {
 83                   "lat" : 18.9106768,
 84                   "lng" : 172.4458955
 85                }
 86             },
 87             "location" : {
 88                "lat" : 37.09024,
 89                "lng" : -95.712891
 90             },
 91             "location_type" : "APPROXIMATE",
 92             "viewport" : {
 93                "northeast" : {
 94                   "lat" : 49.38,
 95                   "lng" : -66.94
 96                },
 97                "southwest" : {
 98                   "lat" : 25.82,
 99                   "lng" : -124.39
100                }
101             }
102          },
103          "place_id" : "ChIJCzYy5IS16lQRQrfeQ5K5Oxw",
104          "types" : [ "country", "political" ]
105       }
106    ],
107    "status" : "OK"
108 }

  1 <GeocodeResponse>
  2     <status>OK</status>
  3     <result>
  4         <type>street_address</type>
  5         <formatted_address>511 Ocean Ave, Sea Girt, NJ 08750美国</formatted_address>
  6         <address_component>
  7             <long_name>511</long_name>
  8             <short_name>511</short_name>
  9             <type>street_number</type>
 10         </address_component>
 11         <address_component>
 12             <long_name>Ocean Avenue</long_name>
 13             <short_name>Ocean Ave</short_name>
 14             <type>route</type>
 15         </address_component>
 16         <address_component>
 17             <long_name>Sea Girt</long_name>
 18             <short_name>Sea Girt</short_name>
 19             <type>locality</type>
 20             <type>political</type>
 21         </address_component>
 22         <address_component>
 23             <long_name>Monmouth County</long_name>
 24             <short_name>Monmouth County</short_name>
 25             <type>administrative_area_level_2</type>
 26             <type>political</type>
 27         </address_component>
 28         <address_component>
 29             <long_name>New Jersey</long_name>
 30             <short_name>NJ</short_name>
 31             <type>administrative_area_level_1</type>
 32             <type>political</type>
 33         </address_component>
 34         <address_component>
 35             <long_name>美国</long_name>
 36             <short_name>US</short_name>
 37             <type>country</type>
 38             <type>political</type>
 39         </address_component>
 40         <address_component>
 41             <long_name>08750</long_name>
 42             <short_name>08750</short_name>
 43             <type>postal_code</type>
 44         </address_component>
 45         <address_component>
 46             <long_name>2712</long_name>
 47             <short_name>2712</short_name>
 48             <type>postal_code_suffix</type>
 49         </address_component>
 50         <geometry>
 51             <location>
 52                 <lat>40.1315070</lat>
 53                 <lng>-74.0289980</lng>
 54             </location>
 55             <location_type>ROOFTOP</location_type>
 56             <viewport>
 57                 <southwest>
 58                     <lat>40.1301580</lat>
 59                     <lng>-74.0303470</lng>
 60                 </southwest>
 61                 <northeast>
 62                     <lat>40.1328560</lat>
 63                     <lng>-74.0276490</lng>
 64                 </northeast>
 65             </viewport>
 66         </geometry>
 67         <place_id>ChIJSUENuniIwYkRm9pgGolNa2s</place_id>
 68     </result>
 69     <result>
 70         <type>country</type>
 71         <type>political</type>
 72         <formatted_address>美国</formatted_address>
 73         <address_component>
 74             <long_name>美国</long_name>
 75             <short_name>US</short_name>
 76             <type>country</type>
 77             <type>political</type>
 78         </address_component>
 79         <geometry>
 80             <location>
 81                 <lat>37.0902400</lat>
 82                 <lng>-95.7128910</lng>
 83             </location>
 84             <location_type>APPROXIMATE</location_type>
 85             <viewport>
 86                 <southwest>
 87                     <lat>25.8200000</lat>
 88                     <lng>-124.3900000</lng>
 89                 </southwest>
 90                 <northeast>
 91                     <lat>49.3800000</lat>
 92                     <lng>-66.9400000</lng>
 93                 </northeast>
 94             </viewport>
 95             <bounds>
 96                 <southwest>
 97                     <lat>18.9106768</lat>
 98                     <lng>172.4458955</lng>
 99                 </southwest>
100                 <northeast>
101                     <lat>71.3867745</lat>
102                     <lng>-66.9502861</lng>
103                 </northeast>
104             </bounds>
105         </geometry>
106         <place_id>ChIJCzYy5IS16lQRQrfeQ5K5Oxw</place_id>
107     </result>
108 </GeocodeResponse>