android - ホームからアクティビティに戻るときの複数の onResume()

Question

(メインの) アクティビティから移動し、ホーム画面のアイコンをクリックして戻ってくると、アクティビティは自動的に再開 -> 一時停止 -> 再開されます。onResume() は 1 つしか期待していません。私のアクティビティは onResume() 関数で AsyncTask を作成し (アクティビティは他のアクティビティをまったく呼び出していません)、現在、1 つではなく 2 つの追加の AsyncTask が作成されています。いくつかのテストを行ったところ、メインフェストでこのアクティビティが「SingleTask」として宣言されている場合に発生することがわかりました。「SingleTop」を使用すると問題なく実行され、onResume() は 1 回だけ呼び出されます。

ヘルプ！

これは主な活動の私のコードです:

  public class HomeFinderActivity extends ListActivity implements LocationListener          {
  private TextView latituteField;
  private TextView longitudeField;
  private LocationManager locationManager;
  private String provider;
  private Location location;
  private static final String LOG_TAG = "::HomeFinderActivity->Asynctask";
  private ArrayList<Home> home_parts = new ArrayList<Home>();
  private ListViewAdapter m_adapter;

 /** Called when the activity is first created. */
  @Override
  public void onCreate(Bundle savedInstanceState) {
      super.onCreate(savedInstanceState);
      Intent intent = getIntent();
      setContentView(R.layout.main);
      latituteField = (TextView) findViewById(R.id.TextView02);
      longitudeField = (TextView) findViewById(R.id.TextView04);

      // instantiate  ListViewAdapter class
      m_adapter = new ListViewAdapter(this, R.layout.row, home_parts);
      setListAdapter(m_adapter);

      locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);

      // Define the criteria how to select the locatioin provider -> use
      // default
      Criteria criteria = new Criteria();
      provider = locationManager.getBestProvider(criteria, false);
      location = locationManager.getLastKnownLocation(provider);
  }

  //Asynctask to retrieve cursor from database and sort list by distance
  private class SortList extends AsyncTask<Location, Void, ArrayList<Home>> {
      @Override
      protected ArrayList<Home> doInBackground(Location... location) {
          try {
              if (home_parts.isEmpty()){
                  home_parts=Home.getHomeParts(location[0], getApplicationContext());
          }
              else{
                  for (Home d : home_parts){
                      if (location != null){
                          d.setmDistance((int) (d.getmLatitude()), d.getmLongitude(),(double) (location[0].getLatitude())
                                  , (double) (location[0].getLongitude()));               
                          }  
                  }
              }

          } finally {

          }
          Collections.sort(home_parts, new Comparator(){

              public int compare(Object o1, Object o2) {
                  Home p1 = (Home) o1;
                  Home p2 = (Home) o2;
                  return (int) p1.getmDistance()- (int) p2.getmDistance();
              }
          });
          return home_parts;
      }
      protected void onPostExecute(ArrayList<Home> address) {
            m_adapter = new ListViewAdapter(HomeFinderActivity.this, R.layout.row, address);

            // display the list.
            setListAdapter(m_adapter);
      }
  }
      @Override
  protected void onDestroy() {
      // TODO Auto-generated method stub
      super.onDestroy();

  }
  //starting handling location

  /* Request updates at startup */
  @Override
  protected void onResume() {
      super.onResume();
    Log.e(LOG_TAG, "onResume() started");
      if (location != null) {
          onLocationChanged(location);
      }
      else
      {
          latituteField.setText("Location not available");
          longitudeField.setText("Location not available");
      } 

      locationManager.requestLocationUpdates(provider, 400, 1, this);
  }

  /* Remove the locationlistener updates when Activity is paused */
  @Override
  protected void onPause() {
      super.onPause();
        Log.e(LOG_TAG, "onPause() started");
      locationManager.removeUpdates(this);
  }

  public void onLocationChanged(Location location) {
      int lat = (int) (location.getLatitude());
      int lng = (int) (location.getLongitude());
      latituteField.setText(String.valueOf(lat));
      longitudeField.setText(String.valueOf(lng));
      SortList showList = new SortList();
      showList.execute(location);
  }

  public void onStatusChanged(String provider, int status, Bundle extras) {
      // TODO Auto-generated method stub
  }

  public void onProviderEnabled(String provider) {
  }

  public void onProviderDisabled(String provider) {
  }

  /** Called when the user clicks the Add Entry button */
  public void goAddEntry(View view) {
      Intent intent = new Intent(this, AddEntry.class);
      startActivity(intent);
  } 

}