RasterLayer in android sdk

[kkkk1]

I am trying add raster layer like tiff to the map, and I use the following code:

FileRasterSource rasterSource = new FileRasterSource(file);

final RasterLayer rasterLayer = new RasterLayer(rasterSource);
mMapView.addLayer(rasterLayer);

It works, however once I want to set the layer to fill the veiewport of the map:

mMapView.setExtent(rasterLayer.getExtent());

It does not work.

And what's more, I found that the map can not be zoom out at a certain scale. I am not sure why.

[EricBader]

You may want to listen for when the map status has changed, then call setExtent on the mMapView when the raster layer has finished loading. Consider the following...

mMapView.setOnStatusChangedListener(new OnStatusChangedListener() {

   @Override
   public void onStatusChanged(Object source, STATUS status) {

 
       if(source instanceof RasterLayer && STATUS.LAYER_LOADED == status){

             mMapView.setExtent(rasterLayer.getExtent(), 2);

       }

   }

});

[kkkk1]

In fact I am using the listener at the moment, and it does not work as expectd.

1) I can not see the map unless I zoom in the map.

2) The map will disappear once the map scale is smaller than a certain value.