Android 安卓; 地理编码器，为什么我得到“服务不可用”？
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Android; Geocoder, why do I get "the service is not available"?
提问by Jimmy
I want to use the Geocoder in an android application, I've got the following piece of code to sample it :
我想在 android 应用程序中使用 Geocoder，我有以下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();
}
}
}
I get the following stack trace :
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.access00(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)
Why is the service unavailable? I have the following in my manifest
为什么服务不可用？我的清单中有以下内容
<uses-permission android:name="android.permission.INTERNET"/>
The documentationstates : The Geocoder class requires a backend service that is not included in the core android framework, how/where can I obtain such a service?
该文件规定：The Geocoder class requires a backend service that is not included in the core android framework如何/我在哪里可以得到这样的服务？
回答by Ben English
It's a bug in the emulator for 2.2 http://code.google.com/p/android/issues/detail?id=8816
这是 2.2 模拟器中的一个错误 http://code.google.com/p/android/issues/detail?id=8816
回答by IshRoid
This is only solution for this problem....
这只是这个问题的解决方案......
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")));
回答by Girish Bhutiya
I also have faced this kind of issues like geo.getFromLocationNamereturn null or this kind of exception so find alter net solution is i have used Google api to get lat/long and here is the link for reference.
我也遇到过这种问题，比如geo.getFromLocationName返回空值或这种异常，所以找到alter net解决方案是我使用谷歌api来获取纬度/经度，这里是参考链接。
