Android;地理編碼器，爲什麼我會得到「服務不可用」？

Question

我想使用的地理編碼器在Android應用程序，我有以下的代碼來樣吧：

public class LocatorGeo extends Activity { 
    /** Called when the activity is first created. */ 
    @Override 
    public void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.main); 


     Geocoder geo = new Geocoder(getApplicationContext()); 

     List<Address> myAddrs = new ArrayList<Address>(); 

     try { 
      myAddrs = geo.getFromLocationName("CO100AR", 1); 
     } catch (IOException e) { 
      // TODO Auto-generated catch block 
      e.printStackTrace(); 
     } 
    } 
} 

我碰到下面的堆棧跟蹤：

09-01 15:52:38.809: WARN/System.err(334): java.io.IOException: Service not Available 
09-01 15:52:38.819: WARN/System.err(334):  at android.location.Geocoder.getFromLocationName(Geocoder.java:159) 
09-01 15:52:38.829: WARN/System.err(334):  at com.jameselsey.LocatorGeo.onCreate(LocatorGeo.java:25) 
09-01 15:52:38.829: WARN/System.err(334):  at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047) 
09-01 15:52:38.839: WARN/System.err(334):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2627) 
09-01 15:52:38.849: WARN/System.err(334):  at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2679) 
09-01 15:52:38.849: WARN/System.err(334):  at android.app.ActivityThread.access$2300(ActivityThread.java:125) 
09-01 15:52:38.868: WARN/System.err(334):  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2033) 
09-01 15:52:38.868: WARN/System.err(334):  at android.os.Handler.dispatchMessage(Handler.java:99) 
09-01 15:52:38.879: WARN/System.err(334):  at android.os.Looper.loop(Looper.java:123) 
09-01 15:52:38.889: WARN/System.err(334):  at android.app.ActivityThread.main(ActivityThread.java:4627) 
09-01 15:52:38.899: WARN/System.err(334):  at java.lang.reflect.Method.invokeNative(Native Method) 
09-01 15:52:38.909: WARN/System.err(334):  at java.lang.reflect.Method.invoke(Method.java:521) 
09-01 15:52:38.919: WARN/System.err(334):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868) 
09-01 15:52:38.929: WARN/System.err(334):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626) 
09-01 15:52:38.929: WARN/System.err(334):  at dalvik.system.NativeStart.main(Native Method) 

爲什麼暫停服務？我在清單

<uses-permission android:name="android.permission.INTERNET"/> 

的documentation狀態如下：The Geocoder class requires a backend service that is not included in the core android framework，如何/我在哪裏可以得到這樣的服務？

Answer 1

這是我也遇到這樣的問題，如geo.getFromLocationName返回NULL 2.2 http://code.google.com/p/android/issues/detail?id=8816

Answer 2

在模擬器中的錯誤或這種異常於是找到改變網解決方案我已經使用谷歌API來獲取LAT /長，這裏是link for reference.

Answer 3

這是在4.0模擬器中修復的。

Answer 4

這僅僅是這個問題的解決方案....

public static JSONObject getLocationInfo(String address) { 

     HttpGet httpGet = new HttpGet("http://maps.google.com/maps/api/geocode/json?address=" +address+"&ka&sensor=false"); 
     HttpClient client = new DefaultHttpClient(); 
     HttpResponse response; 
     StringBuilder stringBuilder = new StringBuilder(); 

     try { 
      response = client.execute(httpGet); 
      HttpEntity entity = response.getEntity(); 
      InputStream stream = entity.getContent(); 
      int b; 
      while ((b = stream.read()) != -1) { 
       stringBuilder.append((char) b); 
      } 
     } catch (ClientProtocolException e) { 
     } catch (IOException e) { 
     } 

     JSONObject jsonObject = new JSONObject(); 
     try { 
      jsonObject = new JSONObject(stringBuilder.toString()); 
     } catch (JSONException e) { 
      // TODO Auto-generated catch block 
      e.printStackTrace(); 
     } 

     return jsonObject; 
    } 

    public static GeoPoint getGeoPoint(JSONObject jsonObject) { 

     Double lon = new Double(0); 
     Double lat = new Double(0); 

     try { 

      lon = ((JSONArray)jsonObject.get("results")).getJSONObject(0) 
       .getJSONObject("geometry").getJSONObject("location") 
       .getDouble("lng"); 

      lat = ((JSONArray)jsonObject.get("results")).getJSONObject(0) 
       .getJSONObject("geometry").getJSONObject("location") 
       .getDouble("lat"); 

     } catch (JSONException e) { 
      // TODO Auto-generated catch block 
      e.printStackTrace(); 
     } 

     return new GeoPoint((int) (lat * 1E6), (int) (lon * 1E6)); 

    } 


GeoPoint srcGeoPoint =getGeoPoint(getLocationInfo(fromAddress.replace("\n"," ").replace(" ", "%20"))); 
      GeoPoint destGeoPoint =getGeoPoint(getLocationInfo(CalDescription.toAddress.replace("\n"," ").replace(" ", "%20")));