如何查找我当前位置附近的位置？

Question

我需要一些关于“如何使用android找到医院，学校，餐厅附近的餐厅”的想法，怎么可能？

Answer 1

使用Google places api找出附近的医院或什么都.....

Answer 2

一步一个脚印，

谷歌的地方API用于通过anloaction的标志性建筑附近访问

步骤1：转到API控制台以获取Place API

https://code.google.com/apis/console/

，并在地方服务中选择服务选项卡

上

现在选择API访问选项卡，并获得API KEY

现在你有一个API密钥对编程让地方

---

现在

*步骤2 *：首先创建一个名为Place.java类。该类用于包含由Place API提供的地点属性。

package com.android.code.GoogleMap.NearsetLandmark; 

import java.util.logging.Level; 
import java.util.logging.Logger; 
import org.json.JSONException; 
import org.json.JSONObject; 


public class Place { 
    private String id; 
    private String icon; 
    private String name; 
    private String vicinity; 
    private Double latitude; 
    private Double longitude; 

    public String getId() { 
     return id; 
    } 

    public void setId(String id) { 
     this.id = id; 
    } 

    public String getIcon() { 
     return icon; 
    } 

    public void setIcon(String icon) { 
     this.icon = icon; 
    } 

    public Double getLatitude() { 
     return latitude; 
    } 

    public void setLatitude(Double latitude) { 
     this.latitude = latitude; 
    } 

    public Double getLongitude() { 
     return longitude; 
    } 

    public void setLongitude(Double longitude) { 
     this.longitude = longitude; 
    } 

    public String getName() { 
     return name; 
    } 

    public void setName(String name) { 
     this.name = name; 
    } 

    public String getVicinity() { 
     return vicinity; 
    } 

    public void setVicinity(String vicinity) { 
     this.vicinity = vicinity; 
    } 

    static Place jsonToPontoReferencia(JSONObject pontoReferencia) { 
     try { 
      Place result = new Place(); 
      JSONObject geometry = (JSONObject) pontoReferencia.get("geometry"); 
      JSONObject location = (JSONObject) geometry.get("location"); 
      result.setLatitude((Double) location.get("lat")); 
      result.setLongitude((Double) location.get("lng")); 
      result.setIcon(pontoReferencia.getString("icon")); 
      result.setName(pontoReferencia.getString("name")); 
      result.setVicinity(pontoReferencia.getString("vicinity")); 
      result.setId(pontoReferencia.getString("id")); 
      return result; 
     } catch (JSONException ex) { 
      Logger.getLogger(Place.class.getName()).log(Level.SEVERE, null, ex); 
     } 
     return null; 
    } 

    @Override 
    public String toString() { 
     return "Place{" + "id=" + id + ", icon=" + icon + ", name=" + name + ", latitude=" + latitude + ", longitude=" + longitude + '}'; 
    } 

} 

现在创建一个名为地方信息

package com.android.code.GoogleMap.NearsetLandmark; 

import java.io.BufferedReader; 
import java.io.InputStreamReader; 
import java.net.URL; 
import java.net.URLConnection; 
import java.util.ArrayList; 
import java.util.List; 
import java.util.logging.Level; 
import java.util.logging.Logger; 
import org.json.JSONArray; 
import org.json.JSONException; 
import org.json.JSONObject; 

import android.util.Log; 


public class PlacesService { 

    private String API_KEY; 

    public PlacesService(String apikey) { 
     this.API_KEY = apikey; 
    } 

    public void setApiKey(String apikey) { 
     this.API_KEY = apikey; 
    } 

    public List<Place> findPlaces(double latitude, double longitude,String placeSpacification) 
    { 

     String urlString = makeUrl(latitude, longitude,placeSpacification); 


     try { 
      String json = getJSON(urlString); 

      System.out.println(json); 
      JSONObject object = new JSONObject(json); 
      JSONArray array = object.getJSONArray("results"); 


      ArrayList<Place> arrayList = new ArrayList<Place>(); 
      for (int i = 0; i < array.length(); i++) { 
       try { 
        Place place = Place.jsonToPontoReferencia((JSONObject) array.get(i)); 

        Log.v("Places Services ", ""+place); 


        arrayList.add(place); 
       } catch (Exception e) { 
       } 
      } 
      return arrayList; 
     } catch (JSONException ex) { 
      Logger.getLogger(PlacesService.class.getName()).log(Level.SEVERE, null, ex); 
     } 
     return null; 
    } 
//https://maps.googleapis.com/maps/api/place/search/json?location=28.632808,77.218276&radius=500&types=atm&sensor=false&key=<key> 
    private String makeUrl(double latitude, double longitude,String place) { 
     StringBuilder urlString = new StringBuilder("https://maps.googleapis.com/maps/api/place/search/json?"); 

     if (place.equals("")) { 
       urlString.append("&location="); 
       urlString.append(Double.toString(latitude)); 
       urlString.append(","); 
       urlString.append(Double.toString(longitude)); 
       urlString.append("&radius=1000"); 
      // urlString.append("&types="+place); 
       urlString.append("&sensor=false&key=" + API_KEY); 
     } else { 
       urlString.append("&location="); 
       urlString.append(Double.toString(latitude)); 
       urlString.append(","); 
       urlString.append(Double.toString(longitude)); 
       urlString.append("&radius=1000"); 
       urlString.append("&types="+place); 
       urlString.append("&sensor=false&key=" + API_KEY); 
     } 


     return urlString.toString(); 
    } 

    protected String getJSON(String url) { 
     return getUrlContents(url); 
    } 

    private String getUrlContents(String theUrl) 
    { 
     StringBuilder content = new StringBuilder(); 

     try { 
      URL url = new URL(theUrl); 
      URLConnection urlConnection = url.openConnection(); 
      BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(urlConnection.getInputStream()), 8); 
      String line; 
      while ((line = bufferedReader.readLine()) != null) 
      { 
       content.append(line + "\n"); 
      } 

      bufferedReader.close(); 
     } 

     catch (Exception e) 
     { 

      e.printStackTrace(); 

     } 

     return content.toString(); 
    } 
} 

要获得最近的地方名单现在创建一个新的活动类。

/** * * /

package com.android.code.GoogleMap.NearsetLandmark; 

    import java.io.BufferedInputStream; 
    import java.io.BufferedOutputStream; 
    import java.io.ByteArrayOutputStream; 
    import java.io.IOException; 
    import java.io.InputStream; 
    import java.net.MalformedURLException; 
    import java.net.URL; 
    import java.util.List; 


    import android.app.AlertDialog; 
    import android.app.ListActivity; 
    import android.content.Context; 
    import android.graphics.Bitmap; 
    import android.graphics.BitmapFactory; 
    import android.graphics.Canvas; 
    import android.graphics.Paint; 
    import android.graphics.Point; 
    import android.graphics.drawable.Drawable; 
    import android.location.Address; 
    import android.location.Location; 
    import android.location.LocationListener; 
    import android.location.LocationManager; 
    import android.net.Uri; 
    import android.os.AsyncTask; 
    import android.os.Bundle; 
    import android.util.Log; 
    import android.view.ContextMenu; 
    import android.view.ContextMenu.ContextMenuInfo; 
    import android.view.LayoutInflater; 
    import android.view.Menu; 
    import android.view.MenuItem; 
    import android.view.View; 
    import android.view.ViewGroup; 
    import android.widget.ArrayAdapter; 
    import android.widget.BaseAdapter; 
    import android.widget.ImageView; 
    import android.widget.ListView; 
    import android.widget.TextView; 

    import com.android.code.R; 
    import com.google.android.maps.MapActivity; 
    import com.google.android.maps.MapController; 
    import com.google.android.maps.MapView; 
    import com.google.android.maps.GeoPoint; 
    import com.google.android.maps.MapActivity; 
    import com.google.android.maps.MapController; 
    import com.google.android.maps.MapView; 
    import com.google.android.maps.Overlay; 

    /** 
    * @author dwivedi ji  * 
    *  */ 
    public class CheckInActivity extends ListActivity { 

    private String[] placeName; 
    private String[] imageUrl; 
    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     // TODO Auto-generated method stub 
     super.onCreate(savedInstanceState); 




     new GetPlaces(this,getListView()).execute(); 
    } 

    class GetPlaces extends AsyncTask<Void, Void, Void>{ 
     Context context; 
     private ListView listView; 
     private ProgressDialog bar; 
     public GetPlaces(Context context, ListView listView) { 
      // TODO Auto-generated constructor stub 
      this.context = context; 
      this.listView = listView; 
     } 

     @Override 
     protected void onPostExecute(Void result) { 
      // TODO Auto-generated method stub 
      super.onPostExecute(result); 
      bar.dismiss(); 
       this.listView.setAdapter(new ArrayAdapter<String>(context, android.R.layout.simple_list_item_1, placeName)); 

     } 

     @Override 
     protected void onPreExecute() { 
      // TODO Auto-generated method stub 
      super.onPreExecute(); 
       bar = new ProgressDialog(context); 
      bar.setIndeterminate(true); 
      bar.setTitle("Loading"); 
      bar.show(); 


     } 

     @Override 
     protected Void doInBackground(Void... arg0) { 
      // TODO Auto-generated method stub 
      findNearLocation(); 
      return null; 
     } 

    } 
    public void findNearLocation() { 

     PlacesService service = new PlacesService("past your key"); 

     /* 
     Hear you should call the method find nearst place near to central park new delhi then we pass the lat and lang of central park. hear you can be pass you current location lat and lang.The third argument is used to set the specific place if you pass the atm the it will return the list of nearest atm list. if you want to get the every thing then you should be pass "" only 
     */ 

/* hear you should be pass the you current location latitude and langitude, */ 
      List<Place> findPlaces = service.findPlaces(28.632808,77.218276,""); 

      placeName = new String[findPlaces.size()]; 
      imageUrl = new String[findPlaces.size()]; 

      for (int i = 0; i < findPlaces.size(); i++) { 

       Place placeDetail = findPlaces.get(i); 
       placeDetail.getIcon(); 

      System.out.println( placeDetail.getName()); 
      placeName[i] =placeDetail.getName(); 

      imageUrl[i] =placeDetail.getIcon(); 

     } 





    } 


}