Android中通过当前经纬度获得城市

浏览数：36 / 时间：2015年06月11日

1、取得用户当前位置的经度，纬度。

2、根据经纬度转换成城市名称。

取得用户当前位置的经度，纬度

今天弄了一个多小时，写了一个GPS获取地理位置代码的小例子，包括参考了网上的一些代码，并且对代码进行了一些修改，希望对大家的帮助。具体代码如下：要实用Adnroid平台的GPS设备，首先需要添加上权限，所以需要添加如下权限：

<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"></uses-permission>

具体实现代码如下：

首先判断GPS模块是否存在或者是开启：

private void openGPSSettings() {  
        LocationManager alm = (LocationManager) this  
                .getSystemService(Context.LOCATION_SERVICE);  
        if (alm  
                .isProviderEnabled(android.location.LocationManager.GPS_PROVIDER)) {  
            Toast.makeText(this, "GPS模块正常", Toast.LENGTH_SHORT)  
                    .show();  
            return;  
        }  
  
        Toast.makeText(this, "请开启GPS！", Toast.LENGTH_SHORT).show();  
        Intent intent = new Intent(Settings.ACTION_SECURITY_SETTINGS);  
        startActivityForResult(intent,0); //此为设置完成后返回到获取界面  
  
}

如果开启正常，则会直接进入到显示页面，如果开启不正常，则会进行到GPS设置页面：

获取代码如下：

private void getLocation()  
    {  
        // 获取位置管理服务  
        LocationManager locationManager;  
        String serviceName = Context.LOCATION_SERVICE;  
        locationManager = (LocationManager) this.getSystemService(serviceName);  
        // 查找到服务信息  
        Criteria criteria = new Criteria();  
        criteria.setAccuracy(Criteria.ACCURACY_FINE); // 高精度  
        criteria.setAltitudeRequired(false);  
        criteria.setBearingRequired(false);  
        criteria.setCostAllowed(true);  
        criteria.setPowerRequirement(Criteria.POWER_LOW); // 低功耗  
  
        String provider = locationManager.getBestProvider(criteria, true); // 获取GPS信息  
        Location location = locationManager.getLastKnownLocation(provider); // 通过GPS获取位置  
        updateToNewLocation(location);  
        // 设置监听器，自动更新的最小时间为间隔N秒(1秒为1*1000，这样写主要为了方便)或最小位移变化超过N米  
        locationManager.requestLocationUpdates(provider, 100 * 1000, 500,  
                locationListener);    
}

到这里就可以获取到地理位置信息了，但是还是要显示出来，那么就用下面的方法进行显示：

private void updateToNewLocation(Location location) {  
  
        TextView tv1;  
        tv1 = (TextView) this.findViewById(R.id.tv1);  
        if (location != null) {  
            double  latitude = location.getLatitude();  
            double longitude= location.getLongitude();  
            tv1.setText("维度：" +  latitude+ "\n经度" + longitude);  
        } else {  
            tv1.setText("无法获取地理信息");  
        }  
  
}

这样子就能获取到当前使用者所在的地理位置了，至少如何下地图上实现，在下面将进行获取，并显示出来！对参考代码的人表示感谢！

根据经纬度转换成城市名称

经纬度转换成城市名称，只能使用地图服务了。自己做不来。

地图服务API有两个，一个是百度地图，一个是谷歌地图。百度地图API调用需要注册百度帐号，并申请APP_KEY，谷歌地图API直接调用即可。

百度地图API调用地址：http://api.map.baidu.com/geocoder?output=json&location=纬度,经度&key=APP_KEY

谷歌地图服务API调用地址：http://maps.google.com/maps/api/geocode/json?latlng= 纬度,经度 &language=zh-CN&sensor=true

可以设置返回数据格式，JSON或者XML。

百度返回的JSON数据如下：

{  
    "status":"OK",  
    "result":{  
        "location":{  
            "lng":112.091446,  
            "lat":34.123231  
        },  
        "formatted_address":"河南省洛阳市嵩县洛栾线",  
        "business":"",  
        "addressComponent":{  
            "city":"洛阳市",  
            "district":"嵩县",  
            "province":"河南省",  
            "street":"洛栾线",  
            "street_number":""  
        },  
        "cityCode":153  
    }  
}

Google返回的JSON数据如下：

{  
   "results" : [  
      {  
         "address_components" : [  
            {  
               "long_name" : "石磊街",  
               "short_name" : "石磊街",  
               "types" : [ "route" ]  
            },  
            {  
               "long_name" : "嵩县",  
               "short_name" : "嵩县",  
               "types" : [ "sublocality", "political" ]  
            },  
            {  
               "long_name" : "洛阳",  
               "short_name" : "洛阳",  
               "types" : [ "locality", "political" ]  
            },  
            {  
               "long_name" : "河南省",  
               "short_name" : "河南省",  
               "types" : [ "administrative_area_level_1", "political" ]  
            },  
            {  
               "long_name" : "中国",  
               "short_name" : "CN",  
               "types" : [ "country", "political" ]  
            },  
            {  
               "long_name" : "471400",  
               "short_name" : "471400",  
               "types" : [ "postal_code" ]  
            }  
         ],  
         "formatted_address" : "中国河南省洛阳市嵩县石磊街 邮政编码: 471400",  
         "geometry" : {  
            "bounds" : {  
               "northeast" : {  
                  "lat" : 34.12707180,  
                  "lng" : 112.08963580  
               },  
               "southwest" : {  
                  "lat" : 34.12574650,  
                  "lng" : 112.08785710  
               }  
            },  
            "location" : {  
               "lat" : 34.12640920,  
               "lng" : 112.08874650  
            },  
            "location_type" : "APPROXIMATE",  
            "viewport" : {  
               "northeast" : {  
                  "lat" : 34.12775813029150,  
                  "lng" : 112.0900954302915  
               },  
               "southwest" : {  
                  "lat" : 34.12506016970850,  
                  "lng" : 112.0873974697085  
               }  
            }  
         },  
         "types" : [ "route" ]  
      },  
      {  
         "address_components" : [  
            {  
               "long_name" : "471400",  
               "short_name" : "471400",  
               "types" : [ "postal_code" ]  
            },  
            {  
               "long_name" : "嵩县",  
               "short_name" : "嵩县",  
               "types" : [ "sublocality", "political" ]  
            },  
            {  
               "long_name" : "洛阳",  
               "short_name" : "洛阳",  
               "types" : [ "locality", "political" ]  
            },  
            {  
               "long_name" : "河南省",  
               "short_name" : "河南省",  
               "types" : [ "administrative_area_level_1", "political" ]  
            },  
            {  
               "long_name" : "中国",  
               "short_name" : "CN",  
               "types" : [ "country", "political" ]  
            }  
         ],  
         "formatted_address" : "中国河南省洛阳市嵩县 邮政编码: 471400",  
         "geometry" : {  
            "bounds" : {  
               "northeast" : {  
                  "lat" : 34.15635430,  
                  "lng" : 112.47980870  
               },  
               "southwest" : {  
                  "lat" : 34.11958570,  
                  "lng" : 112.08340650  
               }  
            },  
            "location" : {  
               "lat" : 34.13457310,  
               "lng" : 112.08557980  
            },  
            "location_type" : "APPROXIMATE",  
            "viewport" : {  
               "northeast" : {  
                  "lat" : 34.13770670,  
                  "lng" : 112.09532960  
               },  
               "southwest" : {  
                  "lat" : 34.11958570,  
                  "lng" : 112.08340650  
               }  
            }  
         },  
         "types" : [ "postal_code" ]  
      },  
      {  
         "address_components" : [  
            {  
               "long_name" : "嵩县",  
               "short_name" : "嵩县",  
               "types" : [ "sublocality", "political" ]  
            },  
            {  
               "long_name" : "洛阳",  
               "short_name" : "洛阳",  
               "types" : [ "locality", "political" ]  
            },  
            {  
               "long_name" : "河南省",  
               "short_name" : "河南省",  
               "types" : [ "administrative_area_level_1", "political" ]  
            },  
            {  
               "long_name" : "中国",  
               "short_name" : "CN",  
               "types" : [ "country", "political" ]  
            }  
         ],  
         "formatted_address" : "中国河南省洛阳市嵩县",  
         "geometry" : {  
            "bounds" : {  
               "northeast" : {  
                  "lat" : 34.34610090,  
                  "lng" : 112.37709810  
               },  
               "southwest" : {  
                  "lat" : 33.57053370,  
                  "lng" : 111.7026910  
               }  
            },  
            "location" : {  
               "lat" : 34.1345170,  
               "lng" : 112.0856350  
            },  
            "location_type" : "APPROXIMATE",  
            "viewport" : {  
               "northeast" : {  
                  "lat" : 34.34610090,  
                  "lng" : 112.37709810  
               },  
               "southwest" : {  
                  "lat" : 33.57053370,  
                  "lng" : 111.7026910  
               }  
            }  
         },  
         "types" : [ "sublocality", "political" ]  
      },  
      {  
         "address_components" : [  
            {  
               "long_name" : "洛阳",  
               "short_name" : "洛阳",  
               "types" : [ "locality", "political" ]  
            },  
            {  
               "long_name" : "河南省",  
               "short_name" : "河南省",  
               "types" : [ "administrative_area_level_1", "political" ]  
            },  
            {  
               "long_name" : "中国",  
               "short_name" : "CN",  
               "types" : [ "country", "political" ]  
            }  
         ],  
         "formatted_address" : "中国河南省洛阳市",  
         "geometry" : {  
            "bounds" : {  
               "northeast" : {  
                  "lat" : 35.07023590,  
                  "lng" : 112.98473820  
               },  
               "southwest" : {  
                  "lat" : 33.57053370,  
                  "lng" : 111.13844390  
               }  
            },  
            "location" : {  
               "lat" : 34.6184520,  
               "lng" : 112.454290  
            },  
            "location_type" : "APPROXIMATE",  
            "viewport" : {  
               "northeast" : {  
                  "lat" : 34.83072270,  
                  "lng" : 112.66242380  
               },  
               "southwest" : {  
                  "lat" : 34.48078050,  
                  "lng" : 112.23389270  
               }  
            }  
         },  
         "types" : [ "locality", "political" ]  
      },  
      {  
         "address_components" : [  
            {  
               "long_name" : "河南省",  
               "short_name" : "河南省",  
               "types" : [ "administrative_area_level_1", "political" ]  
            },  
            {  
               "long_name" : "中国",  
               "short_name" : "CN",  
               "types" : [ "country", "political" ]  
            }  
         ],  
         "formatted_address" : "中国河南省",  
         "geometry" : {  
            "bounds" : {  
               "northeast" : {  
                  "lat" : 36.36656020,  
                  "lng" : 116.65223210  
               },  
               "southwest" : {  
                  "lat" : 31.38237110,  
                  "lng" : 110.3604760  
               }  
            },  
            "location" : {  
               "lat" : 34.768190,  
               "lng" : 113.6872280  
            },  
            "location_type" : "APPROXIMATE",  
            "viewport" : {  
               "northeast" : {  
                  "lat" : 36.36656020,  
                  "lng" : 116.65223210  
               },  
               "southwest" : {  
                  "lat" : 31.38237110,  
                  "lng" : 110.3604760  
               }  
            }  
         },  
         "types" : [ "administrative_area_level_1", "political" ]  
      },  
      {  
         "address_components" : [  
            {  
               "long_name" : "中国",  
               "short_name" : "CN",  
               "types" : [ "country", "political" ]  
            }  
         ],  
         "formatted_address" : "中国",  
         "geometry" : {  
            "bounds" : {  
               "northeast" : {  
                  "lat" : 53.56097399999999,  
                  "lng" : 134.77280990  
               },  
               "southwest" : {  
                  "lat" : 18.15352160,  
                  "lng" : 73.49941360  
               }  
            },  
            "location" : {  
               "lat" : 35.861660,  
               "lng" : 104.1953970  
            },  
            "location_type" : "APPROXIMATE",  
            "viewport" : {  
               "northeast" : {  
                  "lat" : 53.56097399999999,  
                  "lng" : 134.77280990  
               },  
               "southwest" : {  
                  "lat" : 18.15352160,  
                  "lng" : 73.49941360  
               }  
            }  
         },  
         "types" : [ "country", "political" ]  
      }  
   ],  
   "status" : "OK"  
}