java.lang.Object
- com.esri.arcgisruntime.layers.Layer

All Implemented Interfaces:: LayerContent, Loadable

Direct Known Subclasses:: AnnotationLayer, ArcGISSceneLayer, ArcGISVectorTiledLayer, DimensionLayer, EncLayer, FeatureCollectionLayer, FeatureLayer, GroupLayer, ImageAdjustmentLayer, IntegratedMeshLayer, KmlLayer, MobileBasemapLayer, PointCloudLayer, UnknownLayer, UnsupportedLayer

public abstract class Layer
extends java.lang.Object
implements Loadable, LayerContent

The abstract base class of all layer types. Layer is the base class for all layer types. A layer is a representation of geographic data portrayed using symbols and text labels. Multiple layers can be 'stacked' to enhance the information displayed. Layers are displayed in a ArcGISMap inside a MapView control and in an ArcGISScene in SceneView. Layers are drawn bottom-to-top, so the first layer in a map's layer collection is drawn first (on the bottom) and each subsequent layer is drawn on top of it.

***Subclasses of Layer***
Layer type	2D/3D	Time-aware	Online/offline	Sources
Annotation layer (`AnnotationLayer`)	2D	No	Both	ArcGIS feature service, portal item, mobile map package (.mmpk)
ArcGIS map image layer (`ArcGISMapImageLayer`)	Both	Yes	Online	ArcGIS map service
ArcGIS scene layer (`ArcGISSceneLayer`)	3D	No	Both	Scene service or scene package
ArcGIS tiled layer (`ArcGISTiledLayer`)	Both	No	Both	ArcGIS tile service, tile package (.tpk/.tpkx)
ArcGIS vector tiled layer (`ArcGISVectorTiledLayer`)	2D	No	Both	ArcGIS vector tile service, vector tile package (.vtpk)
Bing maps layer (`BingMapsLayer`)	Both	No	Online	Bing maps
Dimension layer (DimensionLayer)	2D	Yes	Offline	Mobile map package (.mmpk)
ENC layer (`EncLayer`)	2D	No	Offline	ENC exchange set, ENC cell
Feature collection layer (`FeatureCollectionLayer`)	Both	No	Both	Portal item, web map, feature set / query result
Feature layer (`FeatureLayer`)	Both	Yes	Both	ArcGIS feature service, WFS, shapefile, GeoPackage, geodatabase, OGC API Features
Group layer (`GroupLayer`)	Both	No	Both	Other layers and group layers
KML layer (`KmlLayer`)	Both	Yes	Both	KML file (.kml, .kmz)
Integrated mesh layer (`IntegratedMeshLayer`)	3D	No	Both	Scene layer package (.slpk)
Mobile basemap layer (`MobileBasemapLayer`)	2D	No	Offline	Mobile map package (.mmpk)
OpenStreetMap layer (`OpenStreetMapLayer`)	Both	No	Online	OpenStreetMap.org
Point cloud layer (`PointCloudLayer`)	3D	No	Both	Portal item, scene layer package (.slpk)
Raster layer (`RasterLayer`)	Both	Yes	Both	GeoPackage, raster file, ArcGIS Image service
Subtype feature layer (`SubtypeFeatureLayer`)	2D	No	Both	ArcGIS feature service, geodatabase
Web tiled layer (`WebTiledLayer`)	Both	No	Online	Web tile service
WMS layer (`WmsLayer`)	Both	Yes	Online	WMS service
WMTS layer (`WmtsLayer`)	Both	No	Online	WMTS service

Since:: 100.0.0

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`void`	`addDoneLoadingListener(java.lang.Runnable listener)`	Adds a listener to the loadable resource that is invoked when loading has completed.
`void`	`addLoadStatusChangedListener(LoadStatusChangedListener listener)`	Adds a `LoadStatusChangedListener` to the loadable resource that is invoked whenever the load status changes.
`void`	`addVisibilityChangedListener(VisibilityChangedListener listener)`	Adds a visibility changed listener to the layer.
`void`	`cancelLoad()`	Cancels loading metadata for the object.
`boolean`	`canChangeVisibility()`	Checks whether we can change the visibility of this layer.
`boolean`	`canShowInLegend()`	Checks if this layer will be listed in the legend.
`ListenableFuture<java.util.List<LegendInfo>>`	`fetchLegendInfosAsync()`	Asynchronously fetches a list of legend information for this layer, if any.
`java.lang.String`	`getAttribution()`	Gets the attribution for this layer, such as data providers or copyright text.
`java.lang.String`	`getDescription()`	Gets the description of this layer.
`Envelope`	`getFullExtent()`	Gets the full extent of this layer, which is the extent where all layer data is contained.
`java.lang.String`	`getId()`	Returns a string that represents the layer's unique ID in the map.
`Item`	`getItem()`	Gets the Item associated with this layer.
`ArcGISRuntimeException`	`getLoadError()`	Returns the most recent error that was encountered when the loadable resource transitioned to the `LoadStatus.FAILED_TO_LOAD` state, either due to calling the `Loadable.loadAsync()` or `Loadable.retryLoadAsync()` method.
`LoadStatus`	`getLoadStatus()`	Returns the `LoadStatus` of the loadable resource.
`double`	`getMaxScale()`	Gets the maximum zoom scale for this layer.
`double`	`getMinScale()`	Gets the minimum zoom scale for this layer.
`java.lang.String`	`getName()`	Gets the name of this layer.
`float`	`getOpacity()`	Gets the opacity of this layer.
`SpatialReference`	`getSpatialReference()`	Gets the spatial reference of this layer.
`ListenableList<LayerContent>`	`getSubLayerContents()`	Returns a list of sub layers, if any.
`boolean`	`isIdentifyEnabled()`	Gets whether the layer supports identify.
`boolean`	`isVisible()`	Checks if this layer is visible or not.
`boolean`	`isVisibleAtScale(double scale)`	Checks if this layer has effective visibility at the given scale.
`void`	`loadAsync()`	Loads the metadata of the loadable resource asynchronously.
`boolean`	`removeDoneLoadingListener(java.lang.Runnable listener)`	Removes a done loading listener from the loadable resource.
`boolean`	`removeLoadStatusChangedListener(LoadStatusChangedListener listener)`	Removes a `LoadStatusChangedListener` from the loadable resource.
`void`	`removeVisibilityChangedListener(VisibilityChangedListener listener)`	Removes the visibility changed listener from the layer.
`void`	`retryLoadAsync()`	Loads or retries loading metadata for the object asynchronously.
`void`	`setCanShowInLegend(boolean canShowInLegend)`	Sets whether or not this layer should be visible in the legend.
`void`	`setDescription(java.lang.String description)`	Sets the description of this layer.
`void`	`setId(java.lang.String id)`	Sets a string that represents the layer's unique ID in the map.
`void`	`setMaxScale(double maxScale)`	Sets the maximum zoom scale for this layer.
`void`	`setMinScale(double minScale)`	Sets the minimum zoom scale for this layer.
`void`	`setName(java.lang.String name)`	Sets the name of this layer.
`void`	`setOpacity(float opacity)`	Sets the opacity of this layer.
`void`	`setVisible(boolean visible)`	Sets the layer's visibility if `LayerContent.canChangeVisibility()` returns true.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Method Detail
  - getAttribution
```
public java.lang.String getAttribution()
```
    Gets the attribution for this layer, such as data providers or copyright text.
    
    Returns:
    
    the attribution for this layer
    
    Since:
    
    100.0.0
  - getDescription
```
public java.lang.String getDescription()
```
    Gets the description of this layer.
    
    Returns:
    
    the description of this layer
    
    Since:
    
    100.0.0
  - setDescription
```
public void setDescription(java.lang.String description)
```
    Sets the description of this layer.
    
    Parameters:
    
    description - the description to set on this layer
    
    Since:
    
    100.0.0
  - getFullExtent
```
public Envelope getFullExtent()
```
    Gets the full extent of this layer, which is the extent where all layer data is contained. You can use this to zoom to all features contained in this feature layer. This is calculated from the feature table.
    
    Returns:
    
    the full extent of this layer
    
    Since:
    
    100.0.0
    
    See Also:
    
    FeatureTable.getExtent()
  - getId
```
public java.lang.String getId()
```
    Returns a string that represents the layer's unique ID in the map. For layers from existing maps, this is set by the authoring application. For layers added to a new map, it is the authoring application's responsibility to set this to a unique value.
    
    Returns:
    
    a string containing the ID that uniquely identifies this layer at runtime
    
    Since:
    
    100.0.0
    
    See Also:
    
    setId(java.lang.String)
  - setId
```
public void setId(java.lang.String id)
```
    Sets a string that represents the layer's unique ID in the map. For layers from existing maps, this is set by the authoring application and should not be overwritten. For layers added to a new map, it is the authoring application's responsibility to set this to a unique value.
    
    Parameters:
    
    id - the ID to set
    
    Throws:
    
    java.lang.IllegalArgumentException - if id is null
    
    Since:
    
    100.0.0
  - getMaxScale
```
public double getMaxScale()
```
    Gets the maximum zoom scale for this layer. This determines the maximum scale level this layer can zoom to.
    
    Returns:
    
    the maximum scale level this layer can zoom to
    
    Since:
    
    100.0.0
  - setMaxScale
```
public void setMaxScale(double maxScale)
```
    Sets the maximum zoom scale for this layer. This controls the maximum scale level this layer can zoom to.
    
    Parameters:
    
    maxScale - the maximum scale level this layer can zoom to
    
    Since:
    
    100.0.0
  - getMinScale
```
public double getMinScale()
```
    Gets the minimum zoom scale for this layer. This determines the minimum scale level this layer can zoom to.
    
    Returns:
    
    the minimum scale level this layer can zoom to
    
    Since:
    
    100.0.0
  - setMinScale
```
public void setMinScale(double minScale)
```
    Sets the minimum zoom scale for this layer. This controls the minimum scale level this layer can zoom to.
    
    Parameters:
    
    minScale - the minimum scale level this layer can zoom to
    
    Since:
    
    100.0.0
  - getName
```
public java.lang.String getName()
```
    Gets the name of this layer.
    
    Specified by:
    
    getName in interface LayerContent
    
    Returns:
    
    the name of this layer
    
    Since:
    
    100.0.0
  - setName
```
public void setName(java.lang.String name)
```
    Sets the name of this layer.
    
    Parameters:
    
    name - the name of this layer
    
    Since:
    
    100.0.0
  - getOpacity
```
public float getOpacity()
```
    Gets the opacity of this layer.
    
    Returns:
    
    The opacity of this layer, which is a value in the range of 0.0 - 1.0, with the default being 1.0 which is fully opaque.
    
    Since:
    
    100.0.0
  - setOpacity
```
public void setOpacity(float opacity)
```
    Sets the opacity of this layer.
    
    Parameters:
    
    opacity - the opacity of this layer, which needs to be a value in the range of 0.0 - 1.0, 1.0 being fully opaque
    
    Since:
    
    100.0.0
  - getItem
```
public Item getItem()
```
    Gets the Item associated with this layer.
    
    Returns:
    
    the associated Item or null if this layer is not associated with an Item
    
    Since:
    
    100.0.0
  - getSpatialReference
```
public SpatialReference getSpatialReference()
```
    Gets the spatial reference of this layer.
    
    Returns:
    
    the spatial reference of this layer
    
    Since:
    
    100.0.0
  - isIdentifyEnabled
```
public boolean isIdentifyEnabled()
```
    Gets whether the layer supports identify.
    If the layer is not loaded this may return false if identify support is determined by metadata that is not yet available.
    
    Returns:
    
    true if the layer supports identify, false otherwise
    
    Since:
    
    100.2.0
  - addVisibilityChangedListener
```
public void addVisibilityChangedListener(VisibilityChangedListener listener)
```
    Adds a visibility changed listener to the layer.
    
    Parameters:
    
    listener - the visibility changed listener to add
    
    Throws:
    
    java.lang.IllegalArgumentException - if the listener is null
    
    Since:
    
    100.9.0
  - removeVisibilityChangedListener
```
public void removeVisibilityChangedListener(VisibilityChangedListener listener)
```
    Removes the visibility changed listener from the layer.
    
    Parameters:
    
    listener - the visibility changed listener to be removed
    
    Since:
    
    100.9.0
  - canChangeVisibility
```
public boolean canChangeVisibility()
```
    Description copied from interface: LayerContent
    
    Checks whether we can change the visibility of this layer.
    
    Specified by:
    
    canChangeVisibility in interface LayerContent
    
    Returns:
    
    true if we can change this layer's visibility; false otherwise
  - isVisible
```
public boolean isVisible()
```
    Description copied from interface: LayerContent
    
    Checks if this layer is visible or not.
    
    Specified by:
    
    isVisible in interface LayerContent
    
    Returns:
    
    true if the layer is visible; false otherwise
    
    See Also:
    
    LayerContent.setVisible(boolean)
  - setVisible
```
public void setVisible(boolean visible)
```
    Description copied from interface: LayerContent
    
    Sets the layer's visibility if LayerContent.canChangeVisibility() returns true.
    
    Specified by:
    
    setVisible in interface LayerContent
    
    Parameters:
    
    visible - true to make the layer visible; false to hide it
    
    See Also:
    
    LayerContent.isVisible()
  - isVisibleAtScale
```
public boolean isVisibleAtScale(double scale)
```
    Description copied from interface: LayerContent
    
    Checks if this layer has effective visibility at the given scale. This effective visibility takes care of the effective visibility of the parents at the specified scale.
    
    Specified by:
    
    isVisibleAtScale in interface LayerContent
    
    Parameters:
    
    scale - the scale the visibility has to be calculated for
    
    Returns:
    
    true if the layer will be visible at the given scale; false otherwise
  - canShowInLegend
```
public boolean canShowInLegend()
```
    Description copied from interface: LayerContent
    
    Checks if this layer will be listed in the legend.
    
    Specified by:
    
    canShowInLegend in interface LayerContent
    
    Returns:
    
    true if this layer will be visible in the legend; false otherwise
  - setCanShowInLegend
```
public void setCanShowInLegend(boolean canShowInLegend)
```
    Description copied from interface: LayerContent
    
    Sets whether or not this layer should be visible in the legend.
    
    Specified by:
    
    setCanShowInLegend in interface LayerContent
    
    Parameters:
    
    canShowInLegend - true to show in the legend; false to omit it from the legend
  - getSubLayerContents
```
public ListenableList<LayerContent> getSubLayerContents()
```
    Description copied from interface: LayerContent
    
    Returns a list of sub layers, if any. If there are no sub-layers, an empty list will be returned. This list cannot be used to add or remove sub-layers.
    
    Specified by:
    
    getSubLayerContents in interface LayerContent
    
    Returns:
    
    a read only list of sub-layers, if any
  - fetchLegendInfosAsync
```
public ListenableFuture<java.util.List<LegendInfo>> fetchLegendInfosAsync()
```
    Description copied from interface: LayerContent
    
    Asynchronously fetches a list of legend information for this layer, if any.
    
    Specified by:
    
    fetchLegendInfosAsync in interface LayerContent
    
    Returns:
    
    a listenable future that can be used to get the legend information. Null is returned if an error occurs.
  - getLoadStatus
```
public LoadStatus getLoadStatus()
```
    Description copied from interface: Loadable
    
    Returns the LoadStatus of the loadable resource.
    
    Specified by:
    
    getLoadStatus in interface Loadable
    
    Returns:
    
    the LoadStatus of the loadable resource
  - getLoadError
```
public ArcGISRuntimeException getLoadError()
```
    Description copied from interface: Loadable
    
    Returns the most recent error that was encountered when the loadable resource transitioned to the LoadStatus.FAILED_TO_LOAD state, either due to calling the Loadable.loadAsync() or Loadable.retryLoadAsync() method.
    If the resource subsequently transitions to LoadStatus.LOADED (for example, if a call to retryLoadAsync completes successfully) the error is cleared out.
    
    Specified by:
    
    getLoadError in interface Loadable
    
    Returns:
    
    the most recent error that was encountered when the loadable resource transitioned to the LoadStatus.FAILED_TO_LOAD state.
  - loadAsync
```
public void loadAsync()
```
    Description copied from interface: Loadable
    
    Loads the metadata of the loadable resource asynchronously.
    The load status changes from LoadStatus.NOT_LOADED to LoadStatus.LOADING. A listener can be added via Loadable.addDoneLoadingListener(java.lang.Runnable) that is invoked upon completion of the asynchronous load operation.
    If the load operation completes successfully, the load status will be LoadStatus.LOADED, which means the resource has loaded its metadata.
    If the load operation failed, the load status will be LoadStatus.FAILED_TO_LOAD and the error can be retrieved by calling Loadable.getLoadError().
    This method can be called concurrently and repeatedly, but only one attempt is ever made to perform the load operation. If a load operation is already in progress (LoadStatus.LOADING state) when loadAsync is called, it simply piggy-backs on the outstanding operation and the done loading listener added to the loadable resource is enqueued to be invoked when that operation completes. If the operation has already completed (LoadStatus.LOADED or LoadStatus.FAILED_TO_LOAD state) when loadAsync is called, the done loading listener is immediately invoked when added to the loadable resource.
    If a loadable resource has failed to load, calling loadAsync on it subsequently will not change its state. The done loading listener will be invoked immediately when added to the loadable resource. In order to retry loading the resource, Loadable.retryLoadAsync() needs to be used.
    A load operation that is in progress (LoadStatus.LOADING state) can be cancelled by calling Loadable.cancelLoad().
    
    Specified by:
    
    loadAsync in interface Loadable
  - retryLoadAsync
```
public void retryLoadAsync()
```
    Description copied from interface: Loadable
    
    Loads or retries loading metadata for the object asynchronously.
    Will retry loading the metadata if the object's load status is LoadStatus.FAILED_TO_LOAD. Will load the object if it is not loaded. Will not retry to load the object if the object is loaded.
    For more details on the load process see Loadable.loadAsync().
    
    Specified by:
    
    retryLoadAsync in interface Loadable
  - cancelLoad
```
public void cancelLoad()
```
    Description copied from interface: Loadable
    
    Cancels loading metadata for the object.
    Cancels loading the metadata if the object is loading, and always invokes the done loading listener.
    A load operation that is in progress (LoadStatus.LOADING state) can be cancelled by calling this method and the resource will transition from LoadStatus.LOADING to LoadStatus.FAILED_TO_LOAD state. If the load operation was successfully cancelled, a CancellationException will be returned from Loadable.getLoadError().
    Cancellation should be used carefully because all enqueued done loading listeners for that resource instance will get invoked with an error stating that the operation was cancelled. Thus, one component in the application can cancel the load operation initiated by other components.
    This method does nothing if the resource is not in LoadStatus.LOADING state.
    
    Specified by:
    
    cancelLoad in interface Loadable
  - addDoneLoadingListener
```
public void addDoneLoadingListener(java.lang.Runnable listener)
```
    Description copied from interface: Loadable
    Adds a listener to the loadable resource that is invoked when loading has completed.
    The listener may be added at any point, whether the loadable resource has already completed loading or not.
    
    For resources that are not loaded when the listener is added (LoadStatus is NOT_LOADED or LOADING): When the resource completes loading, the listener will be invoked on the UI thread if it is added from the UI thread, otherwise it is not guaranteed on which thread the listener is invoked.
    
    For resources that are already loaded when the listener is added (LoadStatus is LOADED or FAILED_TO_LOAD): The listener will be called immediately, on the current thread.
    
    Alternatively, to be notified when there is any change in the load status, use the Loadable.addLoadStatusChangedListener(LoadStatusChangedListener) method instead.
    Specified by:
    
    addDoneLoadingListener in interface Loadable
    
    Parameters:
    
    listener - a Runnable that is invoked upon completion of the load operation
  - removeDoneLoadingListener
```
public boolean removeDoneLoadingListener(java.lang.Runnable listener)
```
    Description copied from interface: Loadable
    
    Removes a done loading listener from the loadable resource.
    
    Specified by:
    
    removeDoneLoadingListener in interface Loadable
    
    Parameters:
    
    listener - the listener to be removed
    
    Returns:
    
    true if the listener was removed, otherwise false
  - addLoadStatusChangedListener
```
public void addLoadStatusChangedListener(LoadStatusChangedListener listener)
```
    Description copied from interface: Loadable
    
    Adds a LoadStatusChangedListener to the loadable resource that is invoked whenever the load status changes.
    Adding this listener on the UI thread will cause it to be invoked on the UI thread, otherwise it is not guaranteed on which thread the listener is invoked.
    The listener will not be called if added to a loadable resource that has already completed loading. To be notified when a loadable resource has completed loading, including if the resource is already loaded when the listener is added, use the Loadable.addDoneLoadingListener(Runnable) method.
    
    Specified by:
    
    addLoadStatusChangedListener in interface Loadable
    
    Parameters:
    
    listener - the LoadStatusChangedListener to be added
  - removeLoadStatusChangedListener
```
public boolean removeLoadStatusChangedListener(LoadStatusChangedListener listener)
```
    Description copied from interface: Loadable
    
    Removes a LoadStatusChangedListener from the loadable resource.
    
    Specified by:
    
    removeLoadStatusChangedListener in interface Loadable
    
    Parameters:
    
    listener - the LoadStatusChangedListener to be removed
    
    Returns:
    
    true if the listener was removed, otherwise false

Class Layer

Method Summary

Methods inherited from class java.lang.Object

Method Detail

getAttribution

getDescription

setDescription

getFullExtent

getId

setId

getMaxScale

setMaxScale

getMinScale

setMinScale

getName

setName

getOpacity

setOpacity

getItem

getSpatialReference

isIdentifyEnabled

addVisibilityChangedListener

removeVisibilityChangedListener

canChangeVisibility

isVisible

setVisible

isVisibleAtScale

canShowInLegend

setCanShowInLegend

getSubLayerContents

fetchLegendInfosAsync

getLoadStatus

getLoadError

loadAsync

retryLoadAsync

cancelLoad

addDoneLoadingListener

removeDoneLoadingListener

addLoadStatusChangedListener

removeLoadStatusChangedListener