android 三种定位方式

最近在看android关于定位的方式，查了很多资料，也做了相关实验，在手机上做了测试，下面总结：

一共有三种定位方式，一种是GPS，一种是通过网络的方式，一种则是在基于基站的方式，但是，不管哪种方式，都需要开启网络或者GPS

首先添加权限

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

在COARSE_LOCATION是用于基站定位的时候用的，没有这个权限，在获取getCellLocation的时候报错。

第一种方式通过JASON来实现，是通过基站方式的，引用文章地址：http://www.cnblogs.com/dartagnan/archive/2011/3/9.html，下载只是实现定位的代码

/**    * Google定位的实现.<br/>    * Geolocation的详细信息请参见：<br/>    * <a    * href="http://code.google.com/apis/gears/geolocation_network_protocol.html" mce_href="http://code.google.com/apis/gears/geolocation_network_protocol.html">    * http://code.google.com/apis/gears/geolocation_network_protocol.html</a>    */   public class LocationAct extends Activity {        private TextView txtInfo;        public void onCreate(Bundle savedInstanceState) {            super.onCreate(savedInstanceState);            setContentView(R.layout.main);            Button btn = (Button) findViewById(R.id.btnStart);            txtInfo = (TextView) findViewById(R.id.txtInfo);            btn.setOnClickListener(new Button.OnClickListener() {                public void onClick(View view) {                    getLocation();                }            });        }        private void getLocation() {            TelephonyManager tm = (TelephonyManager) 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) {                // TODO Auto-generated catch block                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();            }            txtInfo.setText(stringBuffer.toString());        }   }

第二种通过严格的GPS来定位，引用文章地址：http://www.cnblogs.com/wisekingokok/archive/2011/09/06/2168479.html，这里只引用代码

public class MainActivity extends Activity {      private LocationManager locationManager;      private GpsStatus gpsstatus;      @Override      public void onCreate(Bundle savedInstanceState) {         super.onCreate(savedInstanceState);         setContentView(R.layout.main);                  //获取到LocationManager对象         locationManager = (LocationManager) getSystemService(LOCATION_SERVICE);                  //根据设置的Criteria对象，获取最符合此标准的provider对象         String currentProvider = locationManager.getProvider(LocationManager.GPS_PROVIDER).getName();                  //根据当前provider对象获取最后一次位置信息         Location currentLocation = locationManager.getLastKnownLocation(currentProvider);         //如果位置信息为null，则请求更新位置信息         if(currentLocation == null){             locationManager.requestLocationUpdates(currentProvider, 0, 0, locationListener);         }         //增加GPS状态监听器         locationManager.addGpsStatusListener(gpsListener);                  //直到获得最后一次位置信息为止，如果未获得最后一次位置信息，则显示默认经纬度         //每隔10秒获取一次位置信息         while(true){             currentLocation = locationManager.getLastKnownLocation(currentProvider);             if(currentLocation != null){                 Log.d("Location", "Latitude: " + currentLocation.getLatitude());                 Log.d("Location", "location: " + currentLocation.getLongitude());                 break;             }else{                 Log.d("Location", "Latitude: " + 0);                 Log.d("Location", "location: " + 0);             }             try {                 Thread.sleep(10000);             } catch (InterruptedException e) {                  Log.e("Location", e.getMessage());             }         }      }            private GpsStatus.Listener gpsListener = new GpsStatus.Listener(){          //GPS状态发生变化时触发          @Override          public void onGpsStatusChanged(int event) {              //获取当前状态              gpsstatus=locationManager.getGpsStatus(null);              switch(event){                  //第一次定位时的事件                  case GpsStatus.GPS_EVENT_FIRST_FIX:                      break;                  //开始定位的事件                  case GpsStatus.GPS_EVENT_STARTED:                      break;                  //发送GPS卫星状态事件                  case GpsStatus.GPS_EVENT_SATELLITE_STATUS:                      Toast.makeText(MainActivity.this, "GPS_EVENT_SATELLITE_STATUS", Toast.LENGTH_SHORT).show();                      Iterable<GpsSatellite> allSatellites = gpsstatus.getSatellites();                         Iterator<GpsSatellite> it=allSatellites.iterator();                       int count = 0;                      while(it.hasNext())                         {                             count++;                      }                      Toast.makeText(MainActivity.this, "Satellite Count:" + count, Toast.LENGTH_SHORT).show();                      break;                  //停止定位事件                  case GpsStatus.GPS_EVENT_STOPPED:                      Log.d("Location", "GPS_EVENT_STOPPED");                      break;              }          }      };                  //创建位置监听器      private LocationListener locationListener = new LocationListener(){          //位置发生改变时调用          @Override          public void onLocationChanged(Location location) {              Log.d("Location", "onLocationChanged");          }            //provider失效时调用          @Override          public void onProviderDisabled(String provider) {              Log.d("Location", "onProviderDisabled");          }            //provider启用时调用          @Override          public void onProviderEnabled(String provider) {              Log.d("Location", "onProviderEnabled");          }            //状态改变时调用          @Override          public void onStatusChanged(String provider, int status, Bundle extras) {              Log.d("Location", "onStatusChanged");          }      };  }

第三种主要是通过网络的方式来定位，引用文章地址：http://www.cnblogs.com/wisekingokok/archive/2011/09/05/2167755.html，这里只写代码

package com.test;    import java.io.IOException;  import java.util.List;    import android.app.Activity;  import android.location.Address;  import android.location.Criteria;  import android.location.Geocoder;  import android.location.Location;  import android.location.LocationListener;  import android.location.LocationManager;  import android.os.Bundle;  import android.util.Log;  import android.widget.Toast;    public class MainActivity extends Activity {      @Override      public void onCreate(Bundle savedInstanceState) {         super.onCreate(savedInstanceState);         setContentView(R.layout.main);                  //获取到LocationManager对象         LocationManager locationManager = (LocationManager) getSystemService(LOCATION_SERVICE);         //创建一个Criteria对象         Criteria criteria = new Criteria();         //设置粗略精确度         criteria.setAccuracy(Criteria.ACCURACY_COARSE);         //设置是否需要返回海拔信息         criteria.setAltitudeRequired(false);         //设置是否需要返回方位信息         criteria.setBearingRequired(false);         //设置是否允许付费服务         criteria.setCostAllowed(true);         //设置电量消耗等级         criteria.setPowerRequirement(Criteria.POWER_HIGH);         //设置是否需要返回速度信息         criteria.setSpeedRequired(false);           //根据设置的Criteria对象，获取最符合此标准的provider对象         String currentProvider = locationManager.getBestProvider(criteria, true);         Log.d("Location", "currentProvider: " + currentProvider);         //根据当前provider对象获取最后一次位置信息         Location currentLocation = locationManager.getLastKnownLocation(currentProvider);         //如果位置信息为null，则请求更新位置信息         if(currentLocation == null){             locationManager.requestLocationUpdates(currentProvider, 0, 0, locationListener);         }         //直到获得最后一次位置信息为止，如果未获得最后一次位置信息，则显示默认经纬度         //每隔10秒获取一次位置信息         while(true){             currentLocation = locationManager.getLastKnownLocation(currentProvider);             if(currentLocation != null){                 Log.d("Location", "Latitude: " + currentLocation.getLatitude());                 Log.d("Location", "location: " + currentLocation.getLongitude());                 break;             }else{                 Log.d("Location", "Latitude: " + 0);                 Log.d("Location", "location: " + 0);             }             try {                 Thread.sleep(10000);             } catch (InterruptedException e) {                  Log.e("Location", e.getMessage());             }         }                  //解析地址并显示         Geocoder geoCoder = new Geocoder(this);         try {             int latitude = (int) currentLocation.getLatitude();             int longitude = (int) currentLocation.getLongitude();             List<Address> list = geoCoder.getFromLocation(latitude, longitude, 2);             for(int i=0; i<list.size(); i++){                 Address address = list.get(i);                  Toast.makeText(MainActivity.this, address.getCountryName() + address.getAdminArea() + address.getFeatureName(), Toast.LENGTH_LONG).show();             }         } catch (IOException e) {             Toast.makeText(MainActivity.this,e.getMessage(), Toast.LENGTH_LONG).show();         }               }            //创建位置监听器      private LocationListener locationListener = new LocationListener(){          //位置发生改变时调用          @Override          public void onLocationChanged(Location location) {              Log.d("Location", "onLocationChanged");              Log.d("Location", "onLocationChanged Latitude" + location.getLatitude());                   Log.d("Location", "onLocationChanged location" + location.getLongitude());          }            //provider失效时调用          @Override          public void onProviderDisabled(String provider) {              Log.d("Location", "onProviderDisabled");          }            //provider启用时调用          @Override          public void onProviderEnabled(String provider) {              Log.d("Location", "onProviderEnabled");          }            //状态改变时调用          @Override          public void onStatusChanged(String provider, int status, Bundle extras) {              Log.d("Location", "onStatusChanged");          }      };  }

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