是否有必要在单独的线程中找到获取位置？

  public class LocationAsyncTask extends AsyncTask<Void, String, String> {





        @Override  protected void onPostExecute(String result) {
            // TODO Auto-generated method stub   
            tvLocation.setText(result);

            }  

        @Override  
        protected void onPreExecute() {
            // TODO Auto-generated method stub   
            tvLocation.setText(\"Finding current location\");

            } 


        @Override  
        protected String doInBackground(Void... params) {  
            // TODO Auto-generated method stub 
            LocationManager locationManager;
            String context = Context.LOCATION_SERVICE;
            locationManager = (LocationManager)getSystemService(context);

            Criteria criteria = new Criteria();
            criteria.setAccuracy(Criteria.ACCURACY_FINE);
            criteria.setAltitudeRequired(false);
            criteria.setBearingRequired(false);
            criteria.setCostAllowed(true);
            criteria.setPowerRequirement(Criteria.POWER_LOW);

            String provider = locationManager.getBestProvider(criteria, true);
            Location location =locationManager.getLastKnownLocation(provider);
            String strUpdateResult = updateWithANewLocation(location);

        //locationManager.requestLocationUpdates(provider, 1000, 10, locationListener);


            return strUpdateResult; 
            }  

        private String updateWithANewLocation(Location location) {
            // TODO Auto-generated method stub
            StringBuilder sbLocation = new StringBuilder();
            String strLocation = new String();
            TextView myLocationText;

            String addressString = \"No address found\";
            String latLongString = \"\";

                //If there is a location
                if (location!= null) {

                        double latitude = location.getLatitude();
                        double longitude = location.getLongitude();
                        double altitude = location.getAltitude();
                        float accuracy = location.getAccuracy();
                        float bearing = location.getBearing();
                        long time = location.getTime();
                        float speed = location.getSpeed();
                        String prov = location.getProvider();
                        strLocation = \"Latitude: \" + latitude + \"\\nLongitude: \" +  longitude + \"\\n\" ;
                        publishProgress(strLocation);

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

                            //if location and then address is found
                            if (addresses.size() > 0 ) {
                                Address address = addresses.get(0);

                                for (int i=0; i <address.getMaxAddressLineIndex(); i++) {
                                    sbLocation.append(address.getAddressLine(i)).append(\"\\n\");
                                }
                                strLocation= sbLocation.toString();
                                publishProgress(strLocation);
                            }
                            //if location but no address
                            else {
                                strLocation = \"Latitude: \" + latitude + \"\\nLongitude: \" +  longitude + \"\\n\";    
                                publishProgress(strLocation);
                            } //end try

                        } catch (IOException e) {
                            strLocation = \"Latitude: \" + latitude + \"\\nLongitude: \" +  longitude + \"\\n\";    
                            publishProgress(strLocation);

                        }//end catch
                    }

                //If no location found
                else {
                    strLocation = \"Unable to find location. \";
                    publishProgress(strLocation);
                }
                return strLocation;



        }// end updateWithANewLocation()






        @Override  protected void onProgressUpdate(String... result) { 
            // TODO Auto-generated method stub 
            tvLocation.setText(result[0]);
            } 
        }