Android的; 地理编码器，为什么我会得到“服务不可用”？
我想在Android应用程序中使用地理编码器，我有以下一段代码来对其进行采样：
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(); } } } 我得到以下堆栈跟踪：
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)
为什么服务不可用？ 我的清单中有以下几点
<uses-permission android:name="android.permission.INTERNET"/>
该文档指出： The Geocoder class requires a backend service that is not included in the core android framework我该如何/在哪里可以获得这样的服务？
这是模拟器中的一个bug， http://code.google.com/p/android/issues/detail?id=8816
这只是解决这个问题….
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")));
我也面临这样的问题，如geo.getFromLocationName返回null或这种exception，所以find改变networking的解决scheme是我已经使用Google API获取纬度/长，这里是链接供参考。
这在4.0模拟器中得到了解决。
