Android - 實時位置分享

Question

我想開發一個應用程序，通過它我們可以與使用相同應用程序的其他用戶分享我們的實時位置。我設計了GUI，其中我已經向每個朋友展示了朋友列表和分享按鈕。當我們點擊分享按鈕時，我們的位置將與該朋友的設備共享。此項目是否需要數據庫或者是否有任何Google服務可以更輕鬆地完成此操作？我只需要一個關於這個項目的指導。 謝謝。

Answer 1

這是您的解決方案：

import java.util.Timer; 
import java.util.TimerTask; 
import android.app.Activity; 
import android.content.Context; 
import android.location.Location; 
import android.location.LocationListener; 
import android.location.LocationManager; 
import android.os.Bundle; 
import android.widget.Toast; 

public class LocationActivity extends Activity { 

double x,y; 
Timer timer; 
    LocationManager lm; 
    boolean gps_enabled = false; 
    boolean network_enabled = false; 
/** Called when the activity is first created. */ 
    @Override 
    public void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.main); 
lm = (LocationManager) this.getSystemService(Context.LOCATION_SERVICE); 
gps_enabled = lm.isProviderEnabled(LocationManager.GPS_PROVIDER); 
      network_enabled = lm.isProviderEnabled(LocationManager.NETWORK_PROVIDER); 
if (!gps_enabled && !network_enabled) { Context context = getApplicationContext(); 
      int duration = Toast.LENGTH_SHORT; 
      Toast toast = Toast.makeText(context, "nothing is enabled", duration); 
      toast.show(); 
} 
if (gps_enabled) 
      lm.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0, 
        locationListenerGps); 
     if (network_enabled) 
      lm.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, 0, 0, 
        locationListenerNetwork); 
     timer=new Timer(); 
     timer.schedule(new GetLastLocation(), 20000); 
} 
LocationListener locationListenerGps = new LocationListener() { 
     public void onLocationChanged(Location location) { 
      timer.cancel(); 
      x =location.getLatitude(); 
      y = location.getLongitude(); 
      lm.removeUpdates(this); 
      lm.removeUpdates(locationListenerNetwork); 
Context context = getApplicationContext(); 
      int duration = Toast.LENGTH_SHORT; 
      Toast toast = Toast.makeText(context, "gps enabled "+x + "\n" + y, duration); 
      toast.show(); 
     } 
public void onProviderDisabled(String provider) { 
     } 
public void onProviderEnabled(String provider) { 
     } 
public void onStatusChanged(String provider, int status, Bundle extras) { 
     } 
    }; 
LocationListener locationListenerNetwork = new LocationListener() { 
     public void onLocationChanged(Location location) { 
      timer.cancel(); 
      x = location.getLatitude(); 
      y = location.getLongitude(); 
      lm.removeUpdates(this); 
      lm.removeUpdates(locationListenerGps); 
Context context = getApplicationContext(); 
      int duration = Toast.LENGTH_SHORT; 
      Toast toast = Toast.makeText(context, "network enabled"+x + "\n" + y, duration); 
      toast.show(); 
     } 
public void onProviderDisabled(String provider) { 
     } 
public void onProviderEnabled(String provider) { 
     } 
public void onStatusChanged(String provider, int status, Bundle extras) { 
     } 
    }; 
class GetLastLocation extends TimerTask { 
     @Override 
     public void run() { 
      lm.removeUpdates(locationListenerGps); 
      lm.removeUpdates(locationListenerNetwork); 
Location net_loc=null, gps_loc=null; 
      if(gps_enabled) 
       gps_loc=lm.getLastKnownLocation(LocationManager.GPS_PROVIDER); 
      if(network_enabled) 
       net_loc=lm.getLastKnownLocation(LocationManager.NETWORK_PROVIDER); 
//if there are both values use the latest one 
      if(gps_loc!=null && net_loc!=null){ 
       if(gps_loc.getTime()>net_loc.getTime()) 
    {x = gps_loc.getLatitude(); 
       y = gps_loc.getLongitude(); 
        Context context = getApplicationContext(); 
        int duration = Toast.LENGTH_SHORT; 
        Toast toast = Toast.makeText(context, "gps lastknown "+x + "\n" + y, duration); 
        toast.show(); 
       } 
       else 
    {x = net_loc.getLatitude(); 
       y = net_loc.getLongitude(); 
       Context context = getApplicationContext(); 
       int duration = Toast.LENGTH_SHORT; 
       Toast toast = Toast.makeText(context, "network lastknown "+x + "\n" + y, duration); 
       toast.show(); 
} 
} 
if(gps_loc!=null){ 
    {x = gps_loc.getLatitude(); 
       y = gps_loc.getLongitude(); 
        Context context = getApplicationContext(); 
        int duration = Toast.LENGTH_SHORT; 
        Toast toast = Toast.makeText(context, "gps lastknown "+x + "\n" + y, duration); 
        toast.show(); 
        } 
} 
      if(net_loc!=null){ 
    {x = net_loc.getLatitude(); 
       y = net_loc.getLongitude(); 
       Context context = getApplicationContext(); 
       int duration = Toast.LENGTH_SHORT; 
       Toast toast = Toast.makeText(context, "network lastknown "+x + "\n" + y, duration); 
       toast.show(); 
} 
      } 
      Context context = getApplicationContext(); 
      int duration = Toast.LENGTH_SHORT; 
      Toast toast = Toast.makeText(context, "no last know avilable", duration); 
      toast.show(); 
} 
}}