Android 定位
jopen
11年前
先从GPS模块获取，再从wifi/gprs模块中获取，最终从蜂窝网中获取设备位置。
import java.io.BufferedReader; import java.io.IOException; import java.io.InputStream; import java.io.InputStreamReader; import java.io.UnsupportedEncodingException; import java.net.MalformedURLException; import java.net.URL; import java.net.URLConnection; import org.apache.http.HttpEntity; import org.apache.http.HttpResponse; import org.apache.http.client.ClientProtocolException; import org.apache.http.client.methods.HttpPost; import org.apache.http.entity.StringEntity; import org.apache.http.impl.client.DefaultHttpClient; import org.json.JSONArray; import org.json.JSONException; import org.json.JSONObject; import org.json.JSONTokener; import android.content.Context; import android.location.Location; import android.location.LocationManager; import android.telephony.TelephonyManager; import android.telephony.gsm.GsmCellLocation; import com.example.pickride.PickrideApplication; public class LocationTools { public static String getLocation() { return getDeviceAddressbyGeoPoint(); } /** * 获取地址 * * @return */ private static String getDeviceAddressbyGeoPoint() { // 自经纬度取得地址 LocationManager locationManager = (LocationManager) PickrideApplication .getAppContext().getSystemService(Context.LOCATION_SERVICE); Location location = locationManager .getLastKnownLocation(LocationManager.GPS_PROVIDER); if (location == null) { location = locationManager .getLastKnownLocation(LocationManager.NETWORK_PROVIDER);// 如果gps取不到就取网络的 } // Log.d("H3c", // "k:" + location.getLatitude() + "-" + location.getLongitude()); if (location == null) { String locaStr = getLocationByGSMCell();// 如果wifi网络无法获取就获取基站的 if (locaStr != null) { return locaStr; } } if (location == null) { return "";// 无法获取该位置 } String add = GetAddr(String.valueOf(location.getLatitude()), String.valueOf(location.getLongitude())); if (add != null) { return add; } return location.getLatitude() + "-" + location.getLongitude(); } /** * 根据经纬度反向解析地址，有时需要多尝试几次 * 注意:(摘自：http://code.google.com/intl/zh-CN/apis/maps/faq.html * 提交的地址解析请求次数是否有限制？) 如果在 24 小时时段内收到来自一个 IP 地址超过 2500 个地址解析请求， 或从一个 IP * 地址提交的地址解析请求速率过快，Google 地图 API 编码器将用 620 状态代码开始响应。 如果地址解析器的使用仍然过多，则从该 IP * 地址对 Google 地图 API 地址解析器的访问可能被永久阻止。 * * @param latitude * 纬度 * @param longitude * 经度 * @return */ private static String GetAddr(String latitude, String longitude) { String addr = ""; // 也可以是http://maps.google.cn/maps/geo?output=csv&key=abcdef&q=%s,%s，不过解析出来的是英文地址 // 密钥可以随便写一个key=abc // output=csv,也可以是xml或json，不过使用csv返回的数据最简洁方便解析 String url = String.format( "http://ditu.google.cn/maps/geo?output=csv&key=abcdef&q=%s,%s", latitude, longitude); URL myURL = null; URLConnection httpsConn = null; try { myURL = new URL(url); } catch (MalformedURLException e) { e.printStackTrace(); return null; } try { httpsConn = (URLConnection) myURL.openConnection(); if (httpsConn != null) { InputStreamReader insr = new InputStreamReader( httpsConn.getInputStream(), "UTF-8"); BufferedReader br = new BufferedReader(insr); String data = null; if ((data = br.readLine()) != null) { String[] retList = data.split(","); if (retList.length > 2 && ("200".equals(retList[0]))) { addr = retList[2]; addr = addr.replace("\"", ""); addr = addr.split(" ")[0];// 只获得地址，否则是地址+邮编 } else { addr = ""; } } insr.close(); } } catch (IOException e) { e.printStackTrace(); return null; } return addr; } private static String getLocationByGSMCell() { TelephonyManager tm = (TelephonyManager) PickrideApplication .getAppContext().getSystemService(Context.TELEPHONY_SERVICE); GsmCellLocation gsmCell = (GsmCellLocation) tm.getCellLocation(); int cid = gsmCell.getCid(); int lac = gsmCell.getLac(); String netOperator = tm.getNetworkOperator(); int mcc = Integer.valueOf(netOperator.substring(0, 3)); int mnc = Integer.valueOf(netOperator.substring(3, 5)); JSONObject holder = new JSONObject(); JSONArray array = new JSONArray(); JSONObject data = new JSONObject(); try { holder.put("version", "1.1.0"); holder.put("host", "maps.google.com"); holder.put("address_language", "zh_CN"); holder.put("request_address", true); holder.put("radio_type", "gsm"); holder.put("carrier", "HTC"); data.put("cell_id", cid); data.put("location_area_code", lac); data.put("mobile_countyr_code", mcc); data.put("mobile_network_code", mnc); array.put(data); holder.put("cell_towers", array); } catch (JSONException e) { e.printStackTrace(); } DefaultHttpClient client = new DefaultHttpClient(); HttpPost httpPost = new HttpPost("http://www.google.com/loc/json"); StringEntity stringEntity = null; try { stringEntity = new StringEntity(holder.toString()); } catch (UnsupportedEncodingException e) { e.printStackTrace(); } httpPost.setEntity(stringEntity); HttpResponse httpResponse = null; try { httpResponse = client.execute(httpPost); } catch (ClientProtocolException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } HttpEntity httpEntity = httpResponse.getEntity(); InputStream is = null; try { is = httpEntity.getContent(); } catch (IllegalStateException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } InputStreamReader isr = new InputStreamReader(is); BufferedReader reader = new BufferedReader(isr); StringBuffer stringBuffer = new StringBuffer(); try { String result = ""; while ((result = reader.readLine()) != null) { stringBuffer.append(result); } } catch (IOException e) { e.printStackTrace(); } String location = stringBuffer.toString(); try { JSONTokener jsonParser = new JSONTokener(location); JSONObject person = (JSONObject) jsonParser.nextValue(); JSONObject oj1 = person.getJSONObject("location"); JSONObject oj2 = oj1.getJSONObject("address"); String region = oj2.getString("region"); String city = oj2.getString("city"); String street = oj2.getString("street"); return region + city + street; } catch (JSONException e) { e.printStackTrace(); } return null; } }