Map went blank after rotation

TigerLeung

Hi guys,

I developed my first app with the Android API. Everything seems working as expected, except that the map goes blank after the device rotates. The error thrown in Eclipse is as follow:
03-09 15:52:46.363: E/libEGL(8091): call to OpenGL ES API with no current context (logged once per thread)

I didn't do anything special for handling the rotation. All map initialization is in OnCreate.

Any idea about how to fix the error or handle the rotation?

Thanks

IvanBespalov

Please explain me, what are you discussing about?

(1) Map Rotation or (2) device flipping (and map rotation as result of it)?

(1) - Clear - it works.

(2) - Need to write code around it 😄
onRetainNonConfigurationInstance()
NB! This method is deprecated.

public void onCreate(Bundle savedInstanceState) {
    // ...
    mapView = (MapView) findViewById(R.id.map);
    // ...
    Object[] init = (Object[]) getLastNonConfigurationInstance();
    if (init != null) {
      mapView.restoreState((String) init[0]);
      tiledMapServiceLayer = (ArcGISTiledMapServiceLayer) init[1];
      graphicsLayer = (GraphicsLayer) init[2];
    } else {
      mapView.setExtent(new Envelope(-85.61828847183895, 38.19242311866144, -85.53589100936443, 38.31361605305102));
      tiledMapServiceLayer = new ArcGISTiledMapServiceLayer(this, mapURL);
      graphicsLayer = new GraphicsLayer(this);
    }
    // ...
}
// ...
public Object onRetainNonConfigurationInstance() {
    Object appState = new Object[] { mapView.retainState(), tiledMapServiceLayer, graphicsLayer };
    mapView.removeAll();

    return appState;
}

setRetainInstance(boolean)
We has no time to try it ... So, when you solve problem paste your code.

Good luck.

P.S. This link (PDF) as bonus (contains link to WaterServiceApplication sample)