多源在线与离线数据读取之五（Android移动端开发读取四川地理信息中心地名搜索服务）

本实例在前一博客的基础上，主要是针对四川地理信息中心的地名搜索服务，如果利用ArcGIS for Android API进行解析，并接入地理编码信息进行搜索定位。

1）基础准备：下载Java版的Json库（http://code.google.com/p/json-simple/）、熟悉四川地理信息中心地名搜索规则

2）关于地理地理信息中心地名搜索服务规则，说见其网站，这里不多介绍（http://www.scgis.net/serviceshow.aspx?serviceID=cf917508-8033-4d74-9762-c8c07b7083a0）

 

3）代码说明：

         上一博客提取的代码说明这里就不再介绍了，主要介绍跟地名搜索服务相关的几个文件。

 AddressT.java：地名的参数信息

package com.esri.arcgis.android.samples;

public class AddressT {
	private int _ID;
	private double _X;
	private double _Y;
	private String _Name;
	private String _Type;
	private String _Region;
	private String _County;
	private String _PhoneNumber;
	private String _AddressName;
	public void set_ID(int _ID) {
		this._ID = _ID;
	}
	public int get_ID() {
		return _ID;
	}
	public void set_X(double _X) {
		this._X = _X;
	}
	public double get_X() {
		return _X;
	}
	public void set_Y(double _Y) {
		this._Y = _Y;
	}
	public double get_Y() {
		return _Y;
	}
	public void set_Name(String _Name) {
		this._Name = _Name;
	}
	public String get_Name() {
		return _Name;
	}
	public void set_Type(String _Type) {
		this._Type = _Type;
	}
	public String get_Type() {
		return _Type;
	}
	public void set_Region(String _Region) {
		this._Region = _Region;
	}
	public String get_Region() {
		return _Region;
	}
	public void set_County(String _County) {
		this._County = _County;
	}
	public String get_County() {
		return _County;
	}
	public void set_PhoneNumber(String _PhoneNumber) {
		this._PhoneNumber = _PhoneNumber;
	}
	public String get_PhoneNumber() {
		return _PhoneNumber;
	}
	public void set_AddressName(String _AddressName) {
		this._AddressName = _AddressName;
	}
	public String get_AddressName() {
		return _AddressName;
	}

}

 EscapeUnescape.java字符串编码及解码文件

package com.esri.arcgis.android.samples;

public class EscapeUnescape {
	public static String escape(String src) {
		int i;
		char j;
		StringBuffer tmp = new StringBuffer();
		tmp.ensureCapacity(src.length() * 6);
		for (i = 0; i < src.length(); i++) {
			j = src.charAt(i);
			if (Character.isDigit(j) || Character.isLowerCase(j)
					|| Character.isUpperCase(j))
				tmp.append(j);
			else if (j < 256) {
				tmp.append("%");
				if (j < 16)
					tmp.append("0");
				tmp.append(Integer.toString(j, 16));
			} else {
				tmp.append("%u");
				tmp.append(Integer.toString(j, 16));
			}
		}
		return tmp.toString();
	}

	public static String unescape(String src) {
		StringBuffer tmp = new StringBuffer();
		tmp.ensureCapacity(src.length());
		int lastPos = 0, pos = 0;
		char ch;
		while (lastPos < src.length()) {
			pos = src.indexOf("%", lastPos);
			if (pos == lastPos) {
				if (src.charAt(pos + 1) == 'u') {
					ch = (char) Integer.parseInt(
							src.substring(pos + 2, pos + 6), 16);
					tmp.append(ch);
					lastPos = pos + 6;
				} else {
					ch = (char) Integer.parseInt(
							src.substring(pos + 1, pos + 3), 16);
					tmp.append(ch);
					lastPos = pos + 3;
				}
			} else {
				if (pos == -1) {
					tmp.append(src.substring(lastPos));
					lastPos = src.length();
				} else {
					tmp.append(src.substring(lastPos, pos));
					lastPos = pos;
				}
			}
		}
		return tmp.toString();
	}
}

  FindAddress.java：地名搜索类

 

package com.esri.arcgis.android.samples;

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;
import java.util.ArrayList;
//import org.json.simple.JSONArray;
//import org.json.simple.JSONObject;
//import org.json.simple.parser.JSONParser;

import org.json.JSONArray;
import org.json.JSONObject;

public class FindAddress {	
	//&pretty=true
	private String BaseLocation="http://www.scgis.net.cn/imap/iMapServer/NewRest/services/SCNameSearch/Search?StartIndex=0&StopIndex=5&pretty=true";
	private String tokenURL="http://www.scgis.net.cn/imap/iMapServer/Token/getToken?username=test20110703&password=test20110703&IpAddress=&TimeSpan=100M";
	private String keyname="";
	private String token="";
	private String city="";
	private String county="";
	
	public FindAddress(String keyname)
	{
		this.keyname=EscapeUnescape.escape(keyname);
		this.token=EscapeUnescape.escape(new GetToken().sendPost(tokenURL));
	}
	public FindAddress(String keyname,String city)
	{
		this.keyname=EscapeUnescape.escape(keyname);
		this.city=EscapeUnescape.escape(city);
		this.token=new GetToken().sendPost(tokenURL);
	}
	public FindAddress(String keyname,String city,String county)
	{
		this.keyname=EscapeUnescape.escape(keyname);
		this.city=EscapeUnescape.escape(city);
		this.county=EscapeUnescape.escape(county);
		this.token=new GetToken().sendPost(tokenURL);
	}
	
	public ArrayList<AddressT> GetResult()
	{
		ArrayList<AddressT> result=new ArrayList<AddressT>();
		
		
		String url=this.BaseLocation+
		//"&DiQuKey"+this.city+
		//"&QuXianKey"+this.county+
		"&keyname="+this.keyname+
		"&token="+this.token;
			//URLEncoder.encode();
		
		StringBuilder lineJson=new StringBuilder (); 
		try {  
            URL httpurl = new URL(url);  
            HttpURLConnection httpConn = (HttpURLConnection) httpurl  
                    .openConnection();  
            
            httpConn.setDoInput(true);  
            BufferedReader in = new BufferedReader(new InputStreamReader(  
                    httpConn.getInputStream(),"UTF-8"));  
            String line;  
            AddressT oneAddress;
            while ((line = in.readLine()) != null) {            	
            	//System.out.println(line);
            	lineJson.append(line);            	
            }  
            in.close(); 
            //test
			/*oneAddress=new AddressT();
			oneAddress.set_ID(1);
			oneAddress.set_X(31.1);
			oneAddress.set_Y(101.2);
			oneAddress.set_Name(lineJson.toString());
			result.add(oneAddress);*/
			
            //System.out.println(lineJson);
            //decode
            //JSONParser parser = new JSONParser();
            //Object obj = parser.parse(lineJson.toString());            
            //JSONObject allPackage = (JSONObject) obj;
			JSONObject allPackage = new JSONObject(lineJson.toString());			
			
            //get false  return
            if(!(Boolean) allPackage.get("success"))
            {
            	return null;
            }
            //frome  message to features...decode
            //Object objFeatures=((JSONObject)allPackage.get("message")).get("features");
            
            // to array
			//JSONArray arrayFeatures = (JSONArray) objFeatures;
            JSONArray arrayFeatures=allPackage.getJSONObject("message").getJSONArray("features");
			//int count=arrayFeatures.size();
            
			
			
			for(int i=0;i<arrayFeatures.length();i++)
			{
				//JSONArray oneFeature = (JSONArray) ((JSONObject) objT).get("attributes");
				JSONArray oneFeature=arrayFeatures.getJSONObject(i).getJSONArray("attributes");
				oneAddress=new AddressT();
				//Integer.parseInt(oneFeature.get(0).toString());				
				oneAddress.set_ID(Integer.parseInt(oneFeature.get(0).toString()));
				oneAddress.set_X(Double.parseDouble(oneFeature.get(1).toString()));
				oneAddress.set_Y(Double.parseDouble(oneFeature.get(2).toString()));
				oneAddress.set_Name(oneFeature.get(3).toString());
				oneAddress.set_Type(oneFeature.get(4).toString());
				oneAddress.set_Region(oneFeature.get(5).toString());
				oneAddress.set_County(oneFeature.get(6).toString());
				//oneAddress.set_PhoneNumber(oneFeature.get(7).toString());
				//oneAddress.set_AddressName(oneFeature.get(8).toString());
				
				//add it
				result.add(oneAddress);
			}            
        } catch (Exception e) { 
        	//test
        	AddressT oneAddress=new AddressT();
			oneAddress.set_ID(3);
			oneAddress.set_X(31.1);
			oneAddress.set_Y(101.2);
			oneAddress.set_Name(e.getMessage());
			result.add(oneAddress);
            e.printStackTrace();           
        }		
		return result;
	}
}

效果如图：

由于系列代码比较多，需要学习此系列编码的同学，可以留下邮箱，空了我给你们发过去！