如何查找我當前位置附近的位置？

Question

我需要一些關於「如何使用android找到醫院，學校，餐廳附近的餐廳」的想法，怎麼可能？

Answer 1

使用Google places api找出附近的醫院或什麼都.....

Answer 2

一步一個腳印，

谷歌的地方API用於通過anloaction的標誌性建築附近訪問

步驟1：轉到API控制檯以獲取Place API

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

，並在地方服務中選擇服務選項卡

上

現在選擇API訪問選項卡，並獲得API KEY

現在你有一個API密鑰對編程讓地方

---

現在

*步驟2 *：首先創建一個名爲Place.java類。該類用於包含由Place API提供的地點屬性。

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 + '}'; 
    } 

} 

現在創建一個名爲地方信息

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(); 
    } 
} 

要獲得最近的地方名單現在創建一個新的活動類。

/** * * /

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(); 

     } 





    } 


}