Google Geocoding API(地址解析)

来源：互联网发布：官职知编辑：程序博客网时间：2024/05/19 07:07

上一片我们大概了解了一下Geocoder的bug和它的替代方法，Geocoding，直接利用http地址进行解析；下面我们来用一个实例看看如何使用http地址反回来的数据进行解析，我们这里需要用到Google自己开发的一个框架来解析json；json1.7.jar，这个类库的学习，请看：http://code.google.com/p/google-gson/

下面看实例%

1、我们如果要访问网络，首先需要在mainandroidfest.xml文件里添加权限：<uses-permission android:name="android.permission.INTERNET" />

2、修改main.xml文件，添加按钮：点击事件，进行解析；

3、给按钮添加监听器；

4、在这里我们用的是google json进行解析，所以需要两个模型，分别代表json解析出来的两个数据。一个代表一对象，list存储数组；

两具模型为：

[java] view plaincopy

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

[java] view plaincopy

public class TestResult {
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 "TestResult [results=" + results + ", status=" + status + "]";
}
}

Activity代码为：

[java] view plaincopy

public class HelloGPS2Activity extends Activity {
private Button geoButton = null;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
geoButton = (Button)findViewById(R.id.geoButton);
geoButton.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
String url = "http://maps.googleapis.com/maps/api/geocode/json?latlng=40.714224,-73.961452&sensor=false";
//创建一个HttpClient对象
HttpClient httpClient = new DefaultHttpClient();
String responseData = "";
try{
//向指定的URL发送Http请求
HttpResponse response = httpClient.execute(new HttpGet(url));
//取得服务器返回的响应
HttpEntity entity = response.getEntity();
BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(entity.getContent()));
String line = "";
while((line = bufferedReader.readLine()) != null){
responseData = responseData + line;
}
}
catch (Exception e) {
e.printStackTrace();
}
Gson gson = new Gson();
TestResult testResult = gson.fromJson(responseData, TestResult.class);
System.out.println(testResult);
}
});
}
}

当运行之后：点击按钮：就会将接受到的地址JSON数据解析出来：

[html] view plaincopy

08-15 03:33:23.703: INFO/System.out(281): TestResult [results=[Result [formatted_address=279-281 Bedford Ave, Brooklyn, NY 11211, USA, types=[street_address]], Result [formatted_address=Williamsburg, NY, USA, types=[neighborhood, political]], Result [formatted_address=Brooklyn, NY 11211, USA, types=[postal_code]], Result [formatted_address=Brooklyn, NY, USA, types=[sublocality, political]], Result [formatted_address=Kings, New York, USA, types=[administrative_area_level_2, political]], Result [formatted_address=New York, NY, USA, types=[locality, political]], Result [formatted_address=New York, USA, types=[administrative_area_level_1, political]]], status=OK]

我们可以进一步提取里面的信息

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