本文共 7424 字，大约阅读时间需要 24 分钟。

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。

package com.example.h3c.util;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;    }}

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