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Re: What does keyword 'this' refer to in the following code?

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On Mon, 11 Apr 2016 21:44:21 -0700, cdalten wrote:

> https://developers.google.com/maps/documentation/android-api/
> 
> Does 'this' refer to refer to the instance of MapPane or Activity?

It refers to the instance of MapPane as an
com.google.android.gms.maps.OnMapReadyCallback


import com.google.android.gms.maps.*;
import com.google.android.gms.maps.model.*;
import android.app.Activity;
import android.os.Bundle;

public class MapPane extends Activity implements OnMapReadyCallback {

@Override
protected void onCreate(Bundle savedInstanceState) {

  /*
   * From the android.app.Activity javadoc:
   * Derived classes must call through to the super class's 
   * implementation of this method. If they do not,
   * an exception will be thrown.
   */
  super.onCreate(savedInstanceState);

  setContentView(R.layout.map_activity);

  MapFragment mapFragment = (MapFragment) getFragmentManager()
    .findFragmentById(R.id.map);

  /*
   * MapFragment.getMapAsync (OnMapReadyCallback callback)
   * 
   * public interface OnMapReadyCallback {
   *   abstract void onMapReady(GoogleMap googleMap)
   * }
   *
   * So here, "this" refers to this instance of MapPane
   * as an com.google.android.gms.maps.OnMapReadyCallback
   */
  mapFragment.getMapAsync(this);
}


  /*
   * Implementing com.google.android.gms.maps.OnMapReadyCallback
   */
@Override
public void onMapReady(GoogleMap map) {
  LatLng sydney = new LatLng(-33.867, 151.206);

  map.setMyLocationEnabled(true);
  map.moveCamera(CameraUpdateFactory.newLatLngZoom(sydney, 13));

  map.addMarker(new MarkerOptions()
    .title("Sydney")
    .snippet("The most populous city in Australia.")
  .position(sydney));
}
}

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Thread

What does keyword 'this' refer to in the following code? cdalten@gmail.com - 2016-04-11 21:44 -0700
  Re: What does keyword 'this' refer to in the following code? Jukka Lahtinen <jtfjdehf@hotmail.com.invalid> - 2016-04-12 12:16 +0300
  Re: What does keyword 'this' refer to in the following code? Eric Douglas <e.d.programmer@gmail.com> - 2016-04-12 04:57 -0700
    Re: What does keyword 'this' refer to in the following code? cdalten@gmail.com - 2016-04-12 08:28 -0700
      Re: What does keyword 'this' refer to in the following code? Lew <lewbloch@gmail.com> - 2016-04-12 14:03 -0700
        Re: What does keyword 'this' refer to in the following code? cdalten@gmail.com - 2016-04-12 18:23 -0700
          Re: What does keyword 'this' refer to in the following code? Jukka Lahtinen <jtfjdehf@hotmail.com.invalid> - 2016-04-13 11:39 +0300
          Re: What does keyword 'this' refer to in the following code? Eric Douglas <e.d.programmer@gmail.com> - 2016-04-13 05:07 -0700
  Re: What does keyword 'this' refer to in the following code? Jeff Higgins <jeff@invalid.invalid> - 2016-04-12 22:00 +0000
    Re: What does keyword 'this' refer to in the following code? cdalten@gmail.com - 2016-04-12 20:03 -0700
      Re: What does keyword 'this' refer to in the following code? cdalten@gmail.com - 2016-04-12 21:01 -0700
      Re: What does keyword 'this' refer to in the following code? Lars Enderin <lars.enderin@telia.com> - 2016-04-13 10:58 +0200
      Re: What does keyword 'this' refer to in the following code? Eric Douglas <e.d.programmer@gmail.com> - 2016-04-13 05:12 -0700

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