更改坐标经纬度和纬度

Question

如何更改我们得到的坐标纬度和长度，并将其设置为andress。 我来自http://www.androidhive.info/2012/07/android-gps-location-manager-tutorial/。

太感谢你了:)

mainactivity.java

import android.app.Activity; 
import android.os.Bundle; 
import android.view.View; 
import android.widget.Button; 
import android.widget.Toast; 

public class MainActivity extends Activity { 

Button btnShowLocation; 

// GPSTracker class 
GPSTracker gps; 

@Override 
public void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.activity_main); 

    btnShowLocation = (Button) findViewById(R.id.btnShowLocation); 

    // show location button click event 
    btnShowLocation.setOnClickListener(new View.OnClickListener() { 

     @Override 
     public void onClick(View arg0) {   
      // create class object 
      gps = new GPSTracker(MainActivity.this); 

      // check if GPS enabled  
      if(gps.canGetLocation()){ 

       double latitude = gps.getLatitude(); 
       double longitude = gps.getLongitude(); 

       // \n is for new line 
       Toast.makeText(getApplicationContext(), "Your Location is - \nLat: " + latitude + "\nLong: " + longitude, Toast.LENGTH_LONG).show();  
      }else{ 
       // can't get location 
       // GPS or Network is not enabled 
       // Ask user to enable GPS/network in settings 
       gps.showSettingsAlert(); 
      } 

     } 
    }); 
} 

} 

GPStracker.java

package unai.skripsi.test; 


import android.app.AlertDialog; 
import android.app.Service; 
import android.content.Context; 
import android.content.DialogInterface; 
import android.content.Intent; 
import android.location.Location; 
import android.location.LocationListener; 
import android.location.LocationManager; 
import android.os.Bundle; 
import android.os.IBinder; 
import android.provider.Settings; 
import android.util.Log; 

public class GPSTracker extends Service implements LocationListener { 

private final Context mContext; 

// flag for GPS status 
boolean isGPSEnabled = false; 

// flag for network status 
boolean isNetworkEnabled = false; 

// flag for GPS status 
boolean canGetLocation = false; 

Location location; // location 
double latitude; // latitude 
double longitude; // longitude 

// The minimum distance to change Updates in meters 
private static final long MIN_DISTANCE_CHANGE_FOR_UPDATES = 10; // 10 meters 

// The minimum time between updates in milliseconds 
private static final long MIN_TIME_BW_UPDATES = 1000 * 60 * 1; // 1 minute 

// Declaring a Location Manager 
protected LocationManager locationManager; 

public GPSTracker(Context context) { 
    this.mContext = context; 
    getLocation(); 
} 

public Location getLocation() { 
    try { 
     locationManager = (LocationManager) mContext 
       .getSystemService(LOCATION_SERVICE); 

     // getting GPS status 
     isGPSEnabled = locationManager 
       .isProviderEnabled(LocationManager.GPS_PROVIDER); 

     // getting network status 
     isNetworkEnabled = locationManager 
       .isProviderEnabled(LocationManager.NETWORK_PROVIDER); 

     if (!isGPSEnabled && !isNetworkEnabled) { 
      // no network provider is enabled 
     } else { 
      this.canGetLocation = true; 
      // First get location from Network Provider 
      if (isNetworkEnabled) { 
       locationManager.requestLocationUpdates(
         LocationManager.NETWORK_PROVIDER, 
         MIN_TIME_BW_UPDATES, 
         MIN_DISTANCE_CHANGE_FOR_UPDATES, this); 
       Log.d("Network", "Network"); 
       if (locationManager != null) { 
        location = locationManager 
          .getLastKnownLocation(LocationManager.NETWORK_PROVIDER); 
        if (location != null) { 
         latitude = location.getLatitude(); 
         longitude = location.getLongitude(); 
        } 
       } 
      } 
      // if GPS Enabled get lat/long using GPS Services 
      if (isGPSEnabled) { 
       if (location == null) { 
        locationManager.requestLocationUpdates(
          LocationManager.GPS_PROVIDER, 
          MIN_TIME_BW_UPDATES, 
          MIN_DISTANCE_CHANGE_FOR_UPDATES, this); 
        Log.d("GPS Enabled", "GPS Enabled"); 
        if (locationManager != null) { 
         location = locationManager 
           .getLastKnownLocation(LocationManager.GPS_PROVIDER); 
         if (location != null) { 
          latitude = location.getLatitude(); 
          longitude = location.getLongitude(); 
         } 
        } 
       } 
      } 
     } 

    } catch (Exception e) { 
     e.printStackTrace(); 
    } 

    return location; 
} 

/** 
* Stop using GPS listener 
* Calling this function will stop using GPS in your app 
* */ 
public void stopUsingGPS(){ 
    if(locationManager != null){ 
     locationManager.removeUpdates(GPSTracker.this); 
    }  
} 

/** 
* Function to get latitude 
* */ 
public double getLatitude(){ 
    if(location != null){ 
     latitude = location.getLatitude(); 
    } 

    // return latitude 
    return latitude; 
} 

/** 
* Function to get longitude 
* */ 
public double getLongitude(){ 
    if(location != null){ 
     longitude = location.getLongitude(); 
    } 

    // return longitude 
    return longitude; 
} 

/** 
* Function to check GPS/wifi enabled 
* @return boolean 
* */ 
public boolean canGetLocation() { 
    return this.canGetLocation; 
} 

/** 
* Function to show settings alert dialog 
* On pressing Settings button will lauch Settings Options 
* */ 
public void showSettingsAlert(){ 
    AlertDialog.Builder alertDialog = new AlertDialog.Builder(mContext); 

    // Setting Dialog Title 
    alertDialog.setTitle("GPS is settings"); 

    // Setting Dialog Message 
    alertDialog.setMessage("GPS is not enabled. Do you want to go to settings menu?"); 

    // On pressing Settings button 
    alertDialog.setPositiveButton("Settings", new DialogInterface.OnClickListener() { 
     public void onClick(DialogInterface dialog,int which) { 
      Intent intent = new Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS); 
      mContext.startActivity(intent); 
     } 
    }); 

    // on pressing cancel button 
    alertDialog.setNegativeButton("Cancel", new DialogInterface.OnClickListener() { 
     public void onClick(DialogInterface dialog, int which) { 
     dialog.cancel(); 
     } 
    }); 

    // Showing Alert Message 
    alertDialog.show(); 
} 

@Override 
public void onLocationChanged(Location location) { 
} 

@Override 
public void onProviderDisabled(String provider) { 
} 

@Override 
public void onProviderEnabled(String provider) { 
} 

@Override 
public void onStatusChanged(String provider, int status, Bundle extras) { 
} 

@Override 
public IBinder onBind(Intent arg0) { 
    return null; 
} 

} 

Answer 1

你可以简单地使用：

Geocoder geocoder; 
List<Address> addresses; 
geocoder = new Geocoder(this, Locale.getDefault()); 
addresses = geocoder.getFromLocation(latitude, longitude, 1); 

String address = addresses.get(0).getAddressLine(0); 
String city = addresses.get(0).getAddressLine(1); 
String country = addresses.get(0).getAddressLine(2); 

Answer 2

好像你需要什么Geocoder。一个代码示例可以在here找到。

Answer 3

try { 
     Geocoder geocoder; 
     final List<Address> addresses; 
     geocoder = new Geocoder(getApplicationContext(), Locale.getDefault()); 
     if (latitude != 0 || longitude != 0) { 
     addresses = geocoder.getFromLocation(latitude, longitude, 1); 
     System.out.println(addresses.get(0).getAddressLine(0))); 
     } 
    catch(Exception e){} 

Answer 4

class GetLocationName extends AsyncTask<Void, Void, Boolean> { 
    String result_str; 
    double latitude; 
    double longitude; 
    public GetLocationName(double latitude,double longitude) { 
     this.latitude=latitude; 
     this.longitude=longitude; 
    } 

    /** hits and returns the location name JsonObject */ 
    public JSONObject getLocationInfo() { 
     JSONObject jsonObject = new JSONObject(); 
     HttpGet httpGet = new HttpGet(
       "http://maps.google.com/maps/api/geocode/json?latlng=" 
         + latitude + "," + longitude 
         + "&sensor=true"); 
     HttpClient client = new DefaultHttpClient(); 
     HttpResponse response; 
     StringBuilder stringBuilder = new StringBuilder(); 

     try { 
      response = client.execute(httpGet); 
      HttpEntity entity = response.getEntity(); 
      InputStream stream = entity.getContent(); 
      int b; 
      while ((b = stream.read()) != -1) { 
       stringBuilder.append((char) b); 
      } 
      jsonObject = new JSONObject(stringBuilder.toString()); 
     } catch (Exception e) { 
      e.printStackTrace(); 
     } 
     return jsonObject; 
    } 

    protected Boolean doInBackground(Void... args) { 
     try { 
       JSONObject ret = getLocationInfo(); 
       JSONObject location; 
       String location_string; 
       location = ret.getJSONArray("results").getJSONObject(0); 
       location_string = location.getString("formatted_address"); 
       result_str = location_string; 
       Log.v("Selected", result_str); 
       return true; 
      } catch (Exception e) { 
       e.printStackTrace(); 
       return false; 
      } 
     } 
     return false; 
    } 

    protected void onPostExecute(Boolean result) { 
     if (result) { 
      CurrentAddrStr = result_str;//this will have the address 
     } else { 
      //something went wrong.. 
     } 
     super.onPostExecute(result); 
    } 
} 

只是通过经纬度来构造。