Android 实现定位及地理位置解析

来源：互联网发布：二战英军知乎编辑：程序博客网时间：2024/06/05 10:02
整理一些关于地图的资料，方便以后查阅:/*** * 由街道信息转换为经纬度* @param address 街道信息* @return 包含经纬度的一个double 数组,{longtitude,latitude}*/public static double[] getLocationInfoByGoogle(String address){//定义一个HttpClient，用于向指定地址发送请求HttpClient client = new DefaultHttpClient();//向指定地址发送Get请求HttpGet hhtpGet = new HttpGet("http://maps.google.com/maps/api/geocode/json?address="+address+"ka&sensor=false");StringBuilder sb = new StringBuilder();try {//获取服务器响应HttpResponse response = client.execute(hhtpGet);HttpEntity entity = response.getEntity();//获取服务器响应的输入流InputStream stream = entity.getContent();int b;//循环读取服务器响应while((b = stream.read()) != -1){sb.append((char)b);}//将服务器返回的字符串转换为JSONObject  对象JSONObject jsonObject = new JSONObject(sb.toString());//从JSONObject 中取出location 属性JSONObject location = jsonObject.getJSONObject("results").getJSONObject("0").getJSONObject("geometry").getJSONObject("location"); //获取经度信息double longtitude = location.getDouble("lng");double latitude = location.getDouble("lat");return new double[]{longtitude,latitude};} catch (ClientProtocolException e) {e.printStackTrace();} catch (IOException e) {e.printStackTrace();} catch (JSONException e) { e.printStackTrace();}return null;}/*** 根据经纬度获取对应地址,此处的经纬度须使用Google或者高德地图的经纬度；<br>* 若使用百度地图经纬度，须经过百度API接口(BMap.Convertor.transMore(points,2,callback))的转换；* @param longitude 经度* @param latitude 纬度* @return 详细街道地址*/public static String getAddressByGoogle(double longitude,double latitude){//定义一个HttpClient，用于向指定地址发送请求HttpClient client = new DefaultHttpClient();//向指定地址发送Get请求HttpGet hhtpGet = new HttpGet("http://maps.google.com/maps/api/geocode/json?latlng="+latitude+","+longitude+"&sensor=false&region=cn");StringBuilder sb = new StringBuilder();try {//获取服务器响应HttpResponse response = client.execute(hhtpGet);HttpEntity entity = response.getEntity();//获取服务器响应的输入流InputStream stream = entity.getContent();int b;//循环读取服务器响应while((b = stream.read()) != -1){sb.append((char)b);}//将服务器返回的字符串转换为JSONObject  对象JSONObject jsonObject = new JSONObject(sb.toString());//从JSONObject 中取出location 属性JSONObject location = jsonObject.getJSONObject("results").getJSONObject("0").getJSONObject("formatted_address");  return  location.toString();} catch (ClientProtocolException e) {e.printStackTrace();} catch (IOException e) {e.printStackTrace();} catch (JSONException e) { e.printStackTrace();}return null;}




这件事的惨痛经历告诉我：一定要有政治觉悟，不然编代码丫多的都不成。闲话少扯，后来想，百度定位，高德定位都可以嘛。百度的忒郁闷，看了半天文档，被搅得晕头转向。看过高德文档后，发现高德相对百度实现起来比较简单，与原来Android本身的定位、地址解析代码、逻辑相差无几。So,用高德！ 
     现在看下实现逻辑，点击按钮，触发监听事件，在监听事件里，先判断是否开启GPS，没开启的话转到设置界面，让用户开启去。当然，如果手机没GPS硬件支持，就调用网络的定位。接着通过GPS或网络获取手机当前经纬度，将经纬度解析为地址信息，再将地址信息显示到界面。OK，完事儿。 
 
 
      再看对应实现代码，第一步，检测GPS是否开启： 
      01/**
02     * 
03     * 判断GPS是否开启，若未开启，则进入GPS设置页面；设置完成后需用户手动回界面
04     * @param  currentActivity 
05     * @return
06     */
07    public static void openGPSSettings(Context context){
08        //获取位置服务
09        LocationManager lm = (LocationManager) context.getSystemService(Context.LOCATION_SERVICE);
10        //若GPS未开启
11        if(!lm.isProviderEnabled(LocationManager.GPS_PROVIDER)){
12             Toast.makeText(context, "请开启GPS！", Toast.LENGTH_SHORT).show();
13             Intent intent = new Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS);
14             context.startActivity(intent);  
15        }
16    }
17     
18     
19    /**
20     * 
21     * 判断GPS是否开启，若未开启，则进入GPS设置页面；设置完成后仍回原界面
22     * @param  currentActivity 
23     * @return
24     */
25    public static void openGPSSettings(Activity currentActivity){
26        //获取位置服务
27        LocationManager lm = (LocationManager) currentActivity.getSystemService(Context.LOCATION_SERVICE);
28        //若GPS未开启
29        if(!lm.isProviderEnabled(LocationManager.GPS_PROVIDER)){
30             Toast.makeText(currentActivity, "请开启GPS！", Toast.LENGTH_SHORT).show();
31             Intent intent = new Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS);
32             currentActivity.startActivity(intent); //此为设置完成后返回到获取界面
33        }
34    }
 
 
 
 
 
 
 第二步，获取手机当前经纬度： 
 
 01/**
02     * 使用高德定位获取经纬度，包括GPS获取，网络获取;
03     * 
04     * @param context 上下文环境
05     * @param locationListener 位置监听实例
06     * @return HashMap<String,Location> 返回Location实例的HashMap，其中，GPS对应的Location实例对应的Key值为"gps",网络为"network";
07     */
08    public static Map<String,Location> getLocationObject(Context context,LocationListener locationListener){
09        Map<String,Location> lMap = new HashMap<String, Location>();
10         
11        LocationManagerProxy    locationManager = LocationManagerProxy.getInstance(context); 
12        for(final String provider : locationManager.getProviders(true)){
13             
14            //GPS 
15            if(LocationManagerProxy.GPS_PROVIDER.equals(provider) )  {  
16                 
17                Location l =locationManager.getLastKnownLocation(provider);
18                if(null != l){
19                     lMap.put(GPS, l);
20                }
21                locationManager.requestLocationUpdates(provider,  mLocationUpdateMinTime, mLocationUpdateMinDistance,locationListener);
22                break;
23            }
24             
25            //网络 定位服务开启
26        if(LocationManagerProxy.NETWORK_PROVIDER.equals(provider))  {  
27                 
28                Location l =locationManager.getLastKnownLocation(provider);
29                if(null != l){
30                     lMap.put(NETWORK, l);
31                }
32                locationManager.requestLocationUpdates(provider,  mLocationUpdateMinTime, mLocationUpdateMinDistance,locationListener);
33                break;
34            }
35             
36        }
37        return lMap;
38    }
 
       
 
 
  第三步，解析地址： 
  
 
 01/**
02     * 使用高德地理解析，根据经纬度获取对应地址,；<br>
03     * 若使用百度地图经纬度，须经过百度API接口(BMap.Convertor.transMore(points,2,callback))的转换；
04     * @param context 
05     * @param longitude 经度
06     * @param latitude 纬度
07     * @return 详细街道地址
08     */
09    public static String getAddress(Context context,double longitude,double latitude){
10        String address= null;
11          
12        GeoPoint geo = new GeoPoint((int)(latitude*1E6),(int)(longitude*1E6));
13          
14         Geocoder mGeocoder = new Geocoder(context);
15          
16         int x = geo.getLatitudeE6();//得到geo 纬度，单位微度(度* 1E6) 
17         double x1 = ((double)x)/1000000;  
18         int y = geo.getLongitudeE6();//得到geo 经度，单位微度(度* 1E6)  
19         double y1 = ((double) y) / 1000000;  
20          
21        //得到逆理编码，参数分别为：纬度，经度，最大结果集  
22         try {
23             //高德根据政府规定，在由GPS获取经纬度显示时，使用getFromRawGpsLocation()方法;
24            List<Address> listAddress = mGeocoder.getFromRawGpsLocation(x1, y1, 3);
25            if(listAddress.size()!=0){
26                Address a = listAddress.get(0);
27                 
28/*              sb.append("getAddressLine(0)"+a.getAddressLine(0)+"\n");
29                sb.append("a.getAdminArea()"+a.getAdminArea()+"\n");
30                sb.append("a.getCountryName()"+a.getCountryName()+"\n");
31                 
32                sb.append("getFeatureName()"+a.getFeatureName()+"\n");
33                sb.append("a.getLocality()"+a.getLocality()+"\n");
34                sb.append("a.getMaxAddressLineIndex()"+a.getMaxAddressLineIndex()+"\n");
35                sb.append("getPhone()"+a.getPhone()+"\n");
36                sb.append("a.getPremises()"+a.getPremises()+"\n");
37                sb.append("a.getSubAdminArea()"+a.getSubAdminArea()+"\n");
38                 
39                 
40                sb.append("a.getSubLocality()"+a.getSubLocality()+"\n");
41                sb.append("getSubThoroughfare()"+a.getSubThoroughfare()+"\n");
42                sb.append("a.getThoroughfare()"+a.getThoroughfare()+"\n");
43                sb.append("a.getUrl()"+a.getUrl()+"\n");
44                */
45                address = a.getCountryName()+a.getLocality()+(a.getSubLocality()==null?"":a.getSubLocality())+(a.getThoroughfare()==null?"":a.getThoroughfare())
46                        +(a.getSubThoroughfare()==null?"":a.getSubThoroughfare())+a.getFeatureName();
47            }
48        } catch (AMapException e) {
49            // TODO Auto-generated catch block
50            e.printStackTrace();
51        }
52          
53                return address;
54                 
55                 
56    }