Display Layer View State

The sample demonstrates how to view the status of the layers on the map. This is obtained from the enum value of LayerViewStatus. A signal handler is set up on the map to handle the LayerViewStateChangedEvent signal, and the status text is updated when the status changes. The list of operational layers in the map are displayed. Each row in this list also has the view status corresponding to that layer. Pan or zoom the map, to view the status changes in the layers.

• ArcGISMap
• MapView
• LayerViewStateChangedListener
• ArcGISTiledLayer
• ArcGISMapImageLayer
• ServiceFeatureTable
• FeatureLayer

Developer Pattern

The addLayerViewStateChangedListener on MapView listens for LayerViewStateChangedEvent. To get the layer's view status, use method getLayerViewStatus().iterator().next() on event.

// Listen to changes in the status of the Layer
mMapView.addLayerViewStateChangedListener(new LayerViewStateChangedListener() {
    @Override
    public void layerViewStateChanged(LayerViewStateChangedEvent layerViewStateChangedEvent) {

        // get the layer which changed it's state
        Layer layer = layerViewStateChangedEvent.getLayer();

        // get the View Status of the layer
        // View status will be either of ACTIVE, ERROR, LOADING, NOT_VISIBLE, OUT_OF_SCALE, UNKNOWN
        String viewStatus = layerViewStateChangedEvent.getLayerViewStatus().iterator().next().toString();

        final int layerIndex = mMap.getOperationalLayers().indexOf(layer);

        // finding and updating status of the layer
        switch (layerIndex) {
            case TILED_LAYER:
                timeZoneTextView.setText(viewStatusString(viewStatus));
                break;
            case IMAGE_LAYER:
                worldCensusTextView.setText(viewStatusString(viewStatus));
                break;
            case FEATURE_LAYER:
                recreationTextView.setText(viewStatusString(viewStatus));
                break;
        }

    }
});