Android引路蜂地圖開發示例：IP地址查詢

IP地址查詢，可以根據IP地址查詢到該IP所在的地理經緯度坐標，比如下述例子查詢IP 地址58.192.32.1，所在經緯度為118.777802,32.061699，為南京大學所在地。

[java] 
package com.pstreets.gisengine.demo;  
   
import com.mapdigit.gis.DigitalMap;  
import com.mapdigit.gis.MapPoint;  
import com.mapdigit.gis.geometry.GeoLatLng;  
import com.mapdigit.gis.service.IIpAddressGeocodingListener;  
import com.mapdigit.gis.service.IpAddressLocation;  
import com.pstreets.gisengine.R;  
import com.pstreets.gisengine.SharedMapInstance;  
   
import android.app.Activity;  
import android.os.Bundle;  
import android.view.Menu;  
import android.view.MenuInflater;  
import android.view.MenuItem;  
   
public class MapIpSearch extends Activity implements 
  IIpAddressGeocodingListener {  
   
 @Override 
 public void onCreate(Bundle savedInstanceState) {  
  super.onCreate(savedInstanceState);  
  setContentView(R.layout.main);  
 }  
   
 @Override 
 public void onStart() {  
  super.onStart();  
  GeoLatLng center = new GeoLatLng(32.0616667, 118.7777778);  
  SharedMapInstance.map.setCenter(center, 15,  
    com.mapdigit.gis.raster.MapType.MICROSOFTCHINA);  
  SharedMapInstance.map.setIpAddressGeocodingListener(this);  
   
 }  
   
 @Override 
 public boolean onCreateOptionsMenu(Menu menu) {  
  MenuInflater inflater = getMenuInflater();  
  inflater.inflate(R.menu.mapgeocoding_menu, menu);  
  return true;  
 }  
   
 @Override 
 public boolean onOptionsItemSelected(MenuItem item) {  
  // Handle item selection   
  switch (item.getItemId()) {  
  case R.id.findaddress:  
   SharedMapInstance.map.getIpLocations("58.192.32.1");  
   return true;  
   
  default:  
   return super.onOptionsItemSelected(item);  
  }  
   
 }  
   
 @Override 
 public void done(String query, IpAddressLocation result) {  
  if (result != null && result.error.length() == 0 
    && result.longitude.length() > 0 
    && result.longitude.length() > 0) {  
   try {  
   
    MapPoint mapPoint = new MapPoint();  
    String latLng = "[" + result.longitude + "," + result.latitude  
      + ",0]";  
    mapPoint.point = DigitalMap.fromStringToLatLng(latLng);  
    mapPoint.setName(result.organization);  
    mapPoint.setNote(result.city + " " + result.country);  
    SharedMapInstance.map.panTo(mapPoint.point);  
   } catch (Exception e) {  
   
    result.error = "IP_NOT_FOUND";  
   }  
  }  
   
 }  
   
 @Override 
 public void readProgress(int bytes, int total) {  
   
 }  
   
} 
package com.pstreets.gisengine.demo;
 
import com.mapdigit.gis.DigitalMap;
import com.mapdigit.gis.MapPoint;
import com.mapdigit.gis.geometry.GeoLatLng;
import com.mapdigit.gis.service.IIpAddressGeocodingListener;
import com.mapdigit.gis.service.IpAddressLocation;
import com.pstreets.gisengine.R;
import com.pstreets.gisengine.SharedMapInstance;
 
import android.app.Activity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
 
public class MapIpSearch extends Activity implements
  IIpAddressGeocodingListener {
 
 @Override
 public void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.main);
 }
 
 @Override
 public void onStart() {
  super.onStart();
  GeoLatLng center = new GeoLatLng(32.0616667, 118.7777778);
  SharedMapInstance.map.setCenter(center, 15,
    com.mapdigit.gis.raster.MapType.MICROSOFTCHINA);
  SharedMapInstance.map.setIpAddressGeocodingListener(this);
 
 }
 
 @Override
 public boolean onCreateOptionsMenu(Menu menu) {
  MenuInflater inflater = getMenuInflater();
  inflater.inflate(R.menu.mapgeocoding_menu, menu);
  return true;
 }
 
 @Override
 public boolean onOptionsItemSelected(MenuItem item) {
  // Handle item selection
  switch (item.getItemId()) {
  case R.id.findaddress:
   SharedMapInstance.map.getIpLocations("58.192.32.1");
   return true;
 
  default:
   return super.onOptionsItemSelected(item);
  }
 
 }
 
 @Override
 public void done(String query, IpAddressLocation result) {
  if (result != null && result.error.length() == 0
    && result.longitude.length() > 0
    && result.longitude.length() > 0) {
   try {
 
    MapPoint mapPoint = new MapPoint();
    String latLng = "[" + result.longitude + "," + result.latitude
      + ",0]";
    mapPoint.point = DigitalMap.fromStringToLatLng(latLng);
    mapPoint.setName(result.organization);
    mapPoint.setNote(result.city + " " + result.country);
    SharedMapInstance.map.panTo(mapPoint.point);
   } catch (Exception e) {
 
    result.error = "IP_NOT_FOUND";
   }
  }
 
 }
 
 @Override
 public void readProgress(int bytes, int total) {
 
 }
 
}

注：目前IP查詢結果總是以英文返回，如上述結果詳細內容。
ISP：”China Education and Research Network”
Organization: “Nan Jing University”
Country: “CN”
City: “Nanjing”
若想知道該經緯度對應的地名，可以使用地址反編碼服務。
你可以輸入 127.0.0.1 查詢本機地址。

 作者：mapdigit