java - 如何将GPS坐标发送到另一类

我正在组织应用程序，我需要一些帮助将GPS坐标发送到另一个类，该类将它们发送到数据库。当按下Main活动中的send按钮时，它将启动一个意图，该意图开始LocationActivity。从那里，我想将GPS坐标发送到SendActivity，后者将它们发送到数据库（通过PHP程序）。如何将坐标发送到SendActivity？我评论了我尝试过的部分，但没有用。任何帮助，将不胜感激。谢谢！

LocationActivity.java：

public class LocationActivity extends Activity{

    private LocationManager locManager;
    private LocationListener locListener;

    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        startLocation();
    }

    private void startLocation()
    {
        //get a reference to the LocationManager
        locManager = (LocationManager)getSystemService(Context.LOCATION_SERVICE);

        //checked to receive updates from the position
        locListener = new LocationListener() {
            public void onLocationChanged(Location location) {
                SendActivity.send(location); //What to do here?
            }
            public void onProviderDisabled(String provider){
                //labelState.setText("Provider OFF");
            }
            public void onProviderEnabled(String provider){
                //labelState.setText("Provider ON ");
            }
            public void onStatusChanged(String provider, int status, Bundle extras){
                //Log.i("", "Provider Status: " + status);
            }
        };

        locManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0, locListener);
    }
}

SendActivity.java：

public class SendActivity extends Activity {


    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

    void send(Location loc)
    {
        Log.i("", String.valueOf(loc.getLatitude() + " - " + String.valueOf(loc.getLongitude())));
         String lat = String.valueOf(loc.getLatitude());
         String lon = String.valueOf(loc.getLongitude());

        SharedPreferences shared = getSharedPreferences("PEOPLE_PREFERENCES", MODE_PRIVATE);
        final String usr_id2 = shared.getString("USR_ID", "none");

        if (lat != "0" && lon != "0")
        {
            HttpClient httpclient = new DefaultHttpClient();
            HttpPost httppost = new HttpPost("http://example.com/test/example.php");
         try {
           List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>(2);
           nameValuePairs.add(new BasicNameValuePair("lat", lat));
           nameValuePairs.add(new BasicNameValuePair("lon", lon));
           nameValuePairs.add(new BasicNameValuePair("id", usr_id2));
           httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs));
           httpclient.execute(httppost);
         }
         catch (ClientProtocolException e) {
             // TODO Auto-generated catch block
         }
         catch (IOException e) {
             // TODO Auto-generated catch block
         }

        }
    }
}

最佳答案

无需创建活动即可获取LatLong ..
以下是获取LatLong的课程：

class UpdateGeoLocation {
    LocationManager locationManager;
    String provider;
    double lat, lng;
    Location location;
    Location returnlocation;
    Context context;

    public static String locationdetails = null;

    public UpdateGeoLocation(Context context) {
        this.context = context;
        Criteria criteria = new Criteria();
        criteria.setAccuracy(Criteria.ACCURACY_FINE);
        locationManager = (LocationManager) context
                .getSystemService(Context.LOCATION_SERVICE);
        provider = locationManager.getBestProvider(criteria, true);
        location = locationManager.getLastKnownLocation(provider);
        returnlocation = locationManager.getLastKnownLocation(provider);
    }

    public Location getLocation(Location location) {

        if (location != null) {
            Log.d("one", "IF getLocation :: " + location);
            returnlocation.setLatitude(location.getLatitude());
            returnlocation.setLongitude(location.getLongitude());

        } else {
            try {
                listenForLocation(provider);
            } catch (NullPointerException nullPointerException) {
                nullPointerException.printStackTrace();
            } catch (Exception ex) {
                ex.printStackTrace();
            }
        }

        return returnlocation;

    }

    private void listenForLocation(String providerName) {
        locationManager.requestLocationUpdates(providerName, 0, 0,
                locationListener);
        if (location != null) {
            location.getLatitude();
            location.getLongitude();
            getLocation(location);
        } else {
            // Toast.makeText(context, "location null",
            // Toast.LENGTH_SHORT).show();
        }
    }

    private final LocationListener locationListener = new LocationListener() {
        public void onLocationChanged(Location location) {
            returnlocation.setLatitude(location.getLatitude());
            returnlocation.setLongitude(location.getLongitude());
        }

        public void onProviderDisabled(String provider) {

        }

        public void onProviderEnabled(String provider) {
        }

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

}


Following is the Activity where I used above class to get LatLong :

Location location = null;

OnCreate() :

try {
    Looper.prepare();
    if (null != (location = requestForLocation())) {
        if (null != location) {
            Log.d("one", "Location :: " + location.getLatitude());
            Log.d("one", "Location  LATLONG :: " + location.getLongitude());

                        //Use intent or bundle here to send LatLong to other activities..


        } else {
            Log.d("one", "Location not found:: ");

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


private Location requestForLocation() {
    return new UpdateGeoLocation(MonsterLoginActivity.this)
    .getLocation(null);
}

关于java - 如何将GPS坐标发送到另一类，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/9478570/