在android中獲取朋友的位置座標

Question

我想在android中創建應用程序，就像用戶將自己註冊到應用程序時一樣。管理員可以獲取所有註冊用戶的位置。我不知道該怎麼做。任何幫助將不勝感激。謝謝

Answer 1

這個Android應用程序代碼（使用gps傳感器）可以幫助您獲取緯度和經度（速度和距離作爲可選項）以及您自己可以完成的其他事情（保存與主服務器協調）。

public class MainActivity extends Activity { 

    Location p1=new Location("point a"); 
    Location p2=new Location("point b"); 
    double longitude,latitude; 
    TextView speedview,xstart,ystart,distance,time; 
    float speed,dist; 
    LocationManager lm; 
    Button b; 
    int flag,flag1; 
    int hour,min,sec; 
    String location; 

    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_main); 
     speedview=(TextView)findViewById(R.id.speedview); 
     xstart=(TextView)findViewById(R.id.slatitude); 
     b=(Button)findViewById(R.id.button1); 
     ystart=(TextView)findViewById(R.id.slongitude); 
     distance=(TextView)findViewById(R.id.distance); 
     time=(TextView)findViewById(R.id.time); 
     Toast.makeText(getApplicationContext(), "Wait while device check your position.", Toast.LENGTH_LONG).show(); 
     flag = 0; 
     flag1 = 0; 
     hour = 0; 
     min = 0; 
     sec = 0; 

     lm = (LocationManager) this.getSystemService(Context.LOCATION_SERVICE); 

     lm.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0, new LocationListener() { 

      @Override 
      public void onStatusChanged(String arg0, int arg1, Bundle arg2) { 
       // TODO Auto-generated method stub 

      } 

      @Override 
      public void onProviderEnabled(String arg0) { 
       // TODO Auto-generated method stub 
       Log.d("Latitude","enable"); 

      } 

      @Override 
      public void onProviderDisabled(String arg0) { 
       // TODO Auto-generated method stub 
       Log.d("Latitude","disable"); 
      } 

      @Override 
      public void onLocationChanged(Location arg0) { 
       // TODO Auto-generated method stub 
       if(flag==0) 
       { 
        p1.setLatitude(arg0.getLatitude()); 
        p1.setLongitude(arg0.getLongitude()); 
        flag=1; 
        dist=(float)0.0; 
       } 

       xstart.setText("Latitude: "+String.valueOf(latitude)); 
       ystart.setText("Longitude: "+String.valueOf(longitude)); 
       latitude=arg0.getLatitude(); 
       longitude=arg0.getLongitude(); 
       speed=arg0.getSpeed(); 
       speed=(float)((speed*10)/2.55); 
       speedview.setText(String.valueOf(speed)+" kmph"); 
       p2.setLatitude(latitude); 
       p2.setLongitude(longitude); 
       dist=p2.distanceTo(p1); 
       if(flag1==1) 
       { 
        // distance.setText(String.valueOf(dist)+" km"); 
       } 
       Date date=new Date(); 

      } 
     }); 

     b.setOnClickListener(new View.OnClickListener() { 

      @Override 
      public void onClick(View arg0) { 
       // TODO Auto-generated method stub 
       if(flag1==0) 
       { 
        flag1=1; 
        flag=0; 
        b.setText("Stop"); 
        //to start timer code 

       } 
       else 
       { 
        flag1=0; 
        b.setText("Start"); 
        //to reset timer code 
       } 
      } 
     }); 
    } 

    @Override 
    public boolean onCreateOptionsMenu(Menu menu) { 
     // Inflate the menu; this adds items to the action bar if it is present. 
     getMenuInflater().inflate(R.menu.activity_main, menu); 
     return true; 
    } 
} 

使用Android權限： -

1. android.permission.ACCESS_COARSE_LOCATION
2. android.permission.ACCESS_FINE_LOCATION

Answer 2

首先要服務

 package com.tv.schlep2p.app.network; 

    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; 
        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("Please allow access of location to get current location. To re-enable, please go to Settings and turn on Location Service for this app."); 

      // 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; 
     } 

    } 

不是讓活動增添這種合作德拿到的位置

  GPSTracker gps = new GPSTracker(getActivity()); 
      if (gps.canGetLocation()) { 
          latitude = gps.getLatitude(); 
          longitude = gps.getLongitude(); 
          sLat = latitude; 
          sLong = longitude; 
          geocoder = new Geocoder(getActivity()); 
          try { 
           addresses = geocoder.getFromLocation(latitude, 
             longitude, 1); 
           if (addresses.size() > 0) { 
            StringBuilder str = new StringBuilder(); 
            if (Geocoder.isPresent()) { 
             Address returnAddress = addresses.get(0); 
             String more = returnAddress 
               .getFeatureName(); 
             String more1 = returnAddress 
               .getAddressLine(1); 
             String more2 = returnAddress 
               .getAddressLine(2); 
             if (more1.equals(null) 
               && more2.equals(null)) { 
              str.append(more); 
             } else if (more2.equals(null)) { 
              str.append(more + "," + more1); 
             } else { 
              str.append(more + "," + more1 + "," 
                + more2); 
             } 
             _marker_def = googleMap.addMarker(new MarkerOptions() 
               .position(new LatLng(latitude, 
                 longitude))); 
            } 
           } 
          } catch (IOException e) { 
           // TODO Auto-generated catch block 
           e.printStackTrace(); 
           Constants 
             .showAlertDialog(
               "Message", 
               "Unable to get location please try after some time", 
               getActivity(), false); 
          } 
         } else { 
          // can't get location 
          // GPS or Network is not enabled 
          // Ask user to enable GPS/network in settings 
          gps.showSettingsAlert(); 
         } 

在maifest添加此權限：

<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" /> 
    <uses-permission android:name="android.permission.INTERNET" /> 
    <uses-permission android:name="com.google.android.providers.gsf.permission.READ_GSERVICES" /> 
    <uses-permission 

    <!-- Required to show current location --> 
    <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" /> 
    <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" /> 

    <service android:name="YOUR PASCKAGENAME.GPSTRACKER" > 
      <intent-filter> 
       <action android:name="android.intent.action.BOOT_COMPLETED" /> 
       <action android:name="YOUR PASCKAGENAME..LocationService" /> 
      </intent-filter> 
     </service> 

而不是啓動服務