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！