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GroundOverlay | Google Play services

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A ground overlay is an image that is fixed to a map. A ground overlay has the following properties:

Position

There are two ways to specify the position of the ground overlay:

• Using a location: You must provide an image of the ground overlay, a LatLng to which the anchor will be fixed and the width of the overlay (in meters). The anchor is, by default, 50% from the top of the image and 50% from the left of the image. This can be changed. You can optionally provide the height of the overlay (in meters). If you do not provide the height of the overlay, it will be automatically calculated to preserve the proportions of the image.
• Using a Bounds: You must provide a LatLngBounds which will contain the image.

You must specify the position of the ground overlay before it is added to the map, otherwise an IllegalArgumentException will be thrown when the ground overlay is added to the map. Furthermore, you must only specify the position using one of these methods in the GroundOverlayOptions object; otherwise an IllegalStateException will be thrown when specifying using a second method.

Image

The image (as an BitmapDescriptor) to be used for this overlay. The image will be scaled to fit the position provided. You must specify an image before adding the ground overlay to the map; if not an IllegalArgumentException will be thrown when it is added to the map.

Bearing

The amount that the image should be rotated in a clockwise direction. The center of the rotation will be the image's anchor. This is optional and the default bearing is 0, i.e., the image is aligned so that up is north.

zIndex

The order in which this ground overlay is drawn with respect to other overlays (including Polylines and TileOverlays, but not Markers). An overlay with a larger zIndex is drawn over overlays with smaller zIndexes. The order of overlays with the same zIndex value is arbitrary. This is optional and the default zIndex is 0.

Transparency

Transparency of the ground overlay in the range [0..1] where 0 means the overlay is opaque and 1 means the overlay is fully transparent. If the specified bitmap is already partially transparent, the transparency of each pixel will be scaled accordingly (for example, if a pixel in the bitmap has an alpha value of 200 and you specify the transparency of the ground overlay as 0.25, then the pixel will be rendered on the screen with an alpha value of 150). Specification of this property is optional and the default transparency is 0 (opaque).

Visibility

Indicates if the ground overlay is visible or invisible, i.e. whether it is drawn on the map. An invisible ground overlay is not drawn, but retains all of its other properties. This is optional and the default visibility is true, i.e., visible.

Clickability

If you want to handle events fired when the user clicks the ground overlay, set this property to true. You can change this value at any time. The default is false. If this property is set to true, your app will receive notifications to the GoogleMap.OnGroundOverlayClickListener registered through GoogleMap.setOnGroundOverlayClickListener(GoogleMap.OnGroundOverlayClickListener).

Tag

An Object associated with the ground overlay. For example, the Object can contain data about what the ground overlay represents. This is easier than storing a separate Map<GroundOverlay, Object>. As another example, you can associate a String ID corresponding to the ID from a data set. Google Maps SDK for Android neither reads nor writes this property.

Methods in this class must be called on the Android UI thread. If not, an IllegalStateException will be thrown at runtime.

GoogleMap map = ...; // get a map.
 BitmapDescriptor imageDescriptor = ...; // get an image.
 LatLngBounds bounds = ...; // get a bounds
 // Adds a ground overlay with 50% transparency.
 GroundOverlay groundOverlay = map.addGroundOverlay(new GroundOverlayOptions()
     .image(imageDescriptor)
     .positionFromBounds(bounds)
     .transparency(0.5));
 

()

Gets the bearing of the ground overlay in degrees clockwise from north.

()

Gets the bounds for the ground overlay.

()

Gets the height of the ground overlay.

()

Gets this ground overlay's id.

()

Gets the tag for the circle.

()

Gets the width of the ground overlay.

()

Gets the zIndex of this ground overlay.

()

Gets the clickability of the ground overlay.

()

Gets the visibility of this ground overlay.

()

Removes this ground overlay from the map.

(float bearing)

Sets the bearing of the ground overlay (the direction that the vertical axis of the ground overlay points) in degrees clockwise from north.

(boolean clickable)

Sets the clickability of the ground overlay.

(float width, float height)

Sets the dimensions of the ground overlay.

(float width)

Sets the width of the ground overlay.

(

latLng)

Sets the position of the ground overlay by changing the location of the anchor point.

(float transparency)

Sets the transparency of this ground overlay.

(boolean visible)

Sets the visibility of this ground overlay.

(float zIndex)

Sets the zIndex of this ground overlay.

clone()

finalize()

getClass()

hashCode()

notify()

notifyAll()

toString()

wait(long arg0, int arg1)

wait(long arg0)

wait()

Tests if this GroundOverlay is equal to another.

• true if both objects are the same object, that is, this == other.

Gets the bearing of the ground overlay in degrees clockwise from north.

• the bearing of the ground overlay.

Gets the bounds for the ground overlay. This ignores the rotation of the ground overlay.

• a LatLngBounds that contains the ground overlay, ignoring rotation.

Gets the height of the ground overlay.

• the height of the ground overlay in meters.

Gets this ground overlay's id. The id will be unique amongst all GroundOverlays on a map.

• this ground overlay's id.

Gets the location of the anchor point.

• the position on the map (a LatLng).

Gets the tag for the circle.

• the tag if a tag was set with setTag; null if no tag has been set.

Gets the transparency of this ground overlay.

• the transparency of this ground overlay.

Gets the width of the ground overlay.

• the width of the ground overlay in meters.

Gets the zIndex of this ground overlay.

• the zIndex of the ground overlay.

Gets the visibility of this ground overlay. Note that this does not return whether the ground overlay is actually on screen, but whether it will be drawn if it is contained in the camera's viewport.

• this ground overlay's visibility.

Removes this ground overlay from the map. After a ground overlay has been removed, the behavior of all its methods is undefined.

Sets the bearing of the ground overlay (the direction that the vertical axis of the ground overlay points) in degrees clockwise from north. The rotation is performed about the anchor point.

Sets the dimensions of the ground overlay. The image will be stretched to fit the dimensions.

Sets the width of the ground overlay. The height of the ground overlay will be adapted accordingly to preserve aspect ratio.

Sets the image for the Ground Overlay. The new image will occupy the same bounds as the old image.

Sets the position of the ground overlay by changing the location of the anchor point. Preserves all other properties of the image.

Sets the position of the ground overlay by fitting it to the given LatLngBounds. This method will ignore the rotation (bearing) of the ground overlay when positioning it, but the bearing will still be used when drawing it.

Sets the tag for the ground overlay.

You can use this property to associate an arbitrary Object with this ground overlay. For example, the Object can contain data about what the ground overlay represents. This is easier than storing a separate Map<GroundOverlay, Object>. As another example, you can associate a String ID corresponding to the ID from a data set. Google Maps SDK for Android neither reads nor writes this property. It is your responsibility to call setTag(null) to clear the tag when you no longer need it, to prevent memory leaks in your app.

Sets the transparency of this ground overlay. See the documentation at the top of this class for more information.

Sets the visibility of this ground overlay. When not visible, a ground overlay is not drawn, but it keeps all of its other properties.

Sets the zIndex of this ground overlay. See the documentation at the top of this class for more information.

Except as otherwise noted, the content of this page is licensed under the Creative Commons Attribution 4.0 License, and code samples are licensed under the Apache 2.0 License. For details, see the Google Developers Site Policies. Java is a registered trademark of Oracle and/or its affiliates.

Last updated 2024-10-31 UTC.

[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Missing the information I need","missingTheInformationINeed","thumb-down"],["Too complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2024-10-31 UTC."],[[["A GroundOverlay is an image that is fixed to a specific location or area on a Google Map, allowing for the display of custom imagery."],["GroundOverlays can be customized using properties such as position, image, bearing, transparency, visibility, and z-index."],["Developers can interact with GroundOverlays through methods like `setPosition()`, `setImage()`, `setTransparency()`, and more, to control their appearance and behavior."],["GroundOverlays provide features like clickability and custom data storage through tags, enabling interactive elements and data association."],["It's essential to use methods on the UI thread, set the position and image before adding to the map, and manage data tags carefully to prevent errors and memory leaks."]]],[]]

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