我想通过 Cell Towers 信息获取手机的估计位置。我通过 Android 发布来自 Google Geolocation 的示例请求。我发布请求的代码有什么问题？ https://developers.google.com/maps/documentation/business/geolocation/#sample-requests
我使用 Http Post 通过将内容类型设置为 application/json 来发布 JSON 对象。问题是我从调试器获得的请求的结果如下：
06-03 14:51:06.559: D/response(22250): {
06-03 14:51:06.559: D/response(22250): "error": {
06-03 14:51:06.559: D/response(22250): "errors": [
06-03 14:51:06.559: D/response(22250): {
06-03 14:51:06.559: D/response(22250): "domain": "geolocation",
06-03 14:51:06.559: D/response(22250): "reason": "notFound",
06-03 14:51:06.559: D/response(22250): "message": "Not Found"
06-03 14:51:06.559: D/response(22250): }
06-03 14:51:06.559: D/response(22250): ],
06-03 14:51:06.559: D/response(22250): "code": 404,
06-03 14:51:06.559: D/response(22250): "message": "Not Found"
06-03 14:51:06.559: D/response(22250): }
06-03 14:51:06.559: D/response(22250): }
以下是我在 Android 中发布 JSON 请求的方式。
请求的 MainActivity.java 的代码片段。
public class MainActivity extends Activity {
private static String url = "https://www.googleapis.com/geolocation/v1/geolocate";
private JSONParser jsonParser = new JSONParser();
private JSONObject jsonObject = new JSONObject();
private JSONObject cellObject = new JSONObject();
private JSONObject wifiObject = new JSONObject();
private JSONObject resultObject = new JSONObject();
private HttpConnection httpConnection = new HttpConnection();
List<NameValuePair> params = new ArrayList<NameValuePair>();
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
url = url + "?";
//my_key is replaced by the key obtained from the Google Developer Account.
//For the API key, I create a new Server Key by putting the IP address as 0.0.0.0/0.
url = url + "key=" + "my_key";
//the data is the sample request data.
try {
cellObject.put("cellId", 42);
cellObject.put("locationAreaCode",415);
cellObject.put("mobileCountryCode",310);
cellObject.put("mobileNetworkCode",410);
cellObject.put("age", 0);
cellObject.put("signalStrength", -95);
}catch (JSONException e)
{
e.printStackTrace();
}
try{
wifiObject.put("macAddress", "01:23:45:67:89:AB");
wifiObject.put("signalStrength", 8);
wifiObject.put("age", 0);
wifiObject.put("signalToNoiseRatio", -65);
wifiObject.put("channel", 8);
}catch (JSONException e)
{
e.printStackTrace();
}
try{
jsonObject.put("homeMobileCountryCode", 310);
jsonObject.put("homeMobileNetworkCode", 410);
jsonObject.put("radioType", "gsm");
jsonObject.put("carrier","T-Mobile");
jsonObject.put("cellTowers",cellObject); //put nested json object.
jsonObject.put("wifiAccessPoints", wifiObject);
}catch (JSONException e)
{
e.printStackTrace();
}
new PostCell().execute();
}
private class PostCell extends AsyncTask<Void,Void,Void> {
@Override
protected void onPreExecute() {
super.onPreExecute();
//Show progress dialog
pDialog = new ProgressDialog(MainActivity.this);
pDialog.setMessage("Please Wait...");
pDialog.setCancelable(false);
pDialog.show();
}
@Override
protected Void doInBackground(Void... arg0) {
resultObject = httpConnection.sendJSON(jsonObject, url);
return null;
}
@Override
protected void onPostExecute(Void result) {
super.onPostExecute(result);
//Dismiss dialog
if(pDialog.isShowing())
pDialog.dismiss();
}
}
我创建了一个类 HttpConnection。
public class HttpConnection {
private static final int TIME_OUT = 10000;
private static final int BUF_SIZE = 8;
private static final String CHAR_SET = "iso-8859-1";
public HttpConnection(){}
public JSONObject sendJSON(JSONObject job, String url)
{
try{
HttpPost httpPost = new HttpPost(url);
Log.d("URL: ",url);
HttpClient client = new DefaultHttpClient();
//TimeOut Limit
HttpConnectionParams.setConnectionTimeout(client.getParams(),TIME_OUT);
StringEntity se = new StringEntity(job.toString());
se.setContentType(new BasicHeader(HTTP.CONTENT_TYPE,"application/json"));
httpPost.setEntity(se);
HttpResponse response = client.execute(httpPost);
HttpEntity resEntityGet = response.getEntity();
if (resEntityGet != null) {
InputStream inputStream = resEntityGet.getContent();
BufferedReader reader = new BufferedReader(
new InputStreamReader(inputStream, CHAR_SET), BUF_SIZE);
StringBuilder sb = new StringBuilder();
String line = null;
while ((line = reader.readLine()) != null) {
sb.append(line + "\n");
}
inputStream.close();
String stringMyJson = sb.toString();
Log.d("response",stringMyJson);
JSONObject jsonObject = new JSONObject(stringMyJson);
return jsonObject;
}else
{
Log.d("response","null");
return null;
}
}catch (UnsupportedEncodingException e) {
e.printStackTrace();
return null;
}catch (ClientProtocolException e) {
e.printStackTrace();
return null;
}catch (IOException e)
{
e.printStackTrace();
return null;
}catch (JSONException e)
{
e.printStackTrace();
return null;
}
}
}