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Polyline | Google Play services

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A polyline is a list of points, where line segments are drawn between consecutive points. A polyline has the following properties:

Points

The vertices of the line. Line segments are drawn between consecutive points. A polyline is not closed by default; to form a closed polyline, the start and end points must be the same.

Width

Line segment width in screen pixels. The width is constant and independent of the camera's zoom level. The default value is 10.

Color

Line segment color in ARGB format, the same format used by Color. The default value is black (0xff000000).

Start/end cap

Defines the shape to be used at the start or end of a polyline. Supported cap types: ButtCap, SquareCap, RoundCap (applicable for solid stroke pattern) and CustomCap (applicable for any stroke pattern). Default for both start and end: ButtCap.

Joint type

The joint type defines the shape to be used when joining adjacent line segments at all vertices of the polyline except the start and end vertices. See JointType for supported joint types. The default value is JointType.DEFAULT.

Stroke pattern

Solid (default, represented by null) or a sequence of PatternItem objects to be repeated along the line. Available PatternItem types: Gap (defined by gap length in pixels), Dash (defined by line width and dash length in pixels) and Dot (circular, centered on the line, diameter defined by line width in pixels).

Z-Index

The order in which this tile overlay is drawn with respect to other overlays (including GroundOverlays, TileOverlays, Circles, and Polygons but not Markers). An overlay with a larger z-index is drawn over overlays with smaller z-indices. The order of overlays with the same z-index is arbitrary. The default zIndex is 0.

Visibility

Indicates if the polyline is visible or invisible, i.e., whether it is drawn on the map. An invisible polyline is not drawn, but retains all of its other properties. The default is true, i.e., visible.

Geodesic status

Indicates whether the segments of the polyline should be drawn as geodesics, as opposed to straight lines on the Mercator projection. A geodesic is the shortest path between two points on the Earth's surface. The geodesic curve is constructed assuming the Earth is a sphere

Clickability

If you want to handle events fired when the user clicks the polyline, 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.OnPolylineClickListener registered through GoogleMap.setOnPolylineClickListener(GoogleMap.OnPolylineClickListener).

Tag

An Object associated with the polyline. For example, the Object can contain data about what the polyline represents. This is easier than storing a separate Map<Polyline, 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..

Spans

Defines the spans with different styles used to render this polyline. You can use this property to create a polyline with different StrokeStyle on different segments of the polyline.

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.
 // Add a thin red line from London to New York.
 Polyline line = map.addPolyline(new PolylineOptions()
     .add(new LatLng(51.5, -0.1), new LatLng(40.7, -74.0))
     .width(5)
     .color(Color.RED));
 

For more information, read the Shapes developer guide.

()

Gets the color of this polyline.

()

Gets the cap at the end vertex of this polyline.

()

Gets this polyline's id.

()

Gets the joint type used at all vertices of the polyline except the start and end vertices.

()

Gets the stroke pattern of this polyline.

()

Returns a snapshot of the vertices of this polyline at this time .

()

Gets the cap at the start vertex of this polyline.

()

Gets the tag for the polyline.

()

Gets the width of this polyline.

()

Gets the zIndex of this polyline.

()

Gets whether each segment of the line is drawn as a geodesic or not.

()

Gets the visibility of this polyline.

()

Removes this polyline from the map.

(boolean clickable)

Sets the clickability of the polyline.

(int color)

Sets the color of this polyline.

(

endCap)

Sets the cap at the end vertex of this polyline.

(boolean geodesic)

Sets whether to draw each segment of the line as a geodesic or not.

(int jointType)

Sets the joint type for all vertices of the polyline except the start and end vertices.

(

startCap)

Sets the cap at the start vertex of this polyline.

(boolean visible)

Sets the visibility of this polyline.

(float width)

Sets the width of this polyline.

(float zIndex)

Sets the zIndex of this polyline.

clone()

finalize()

getClass()

hashCode()

notify()

notifyAll()

toString()

wait(long arg0, int arg1)

wait(long arg0)

wait()

Tests if this Polyline is equal to another.

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

Gets the color of this polyline.

• the color in ARGB format.

Gets the cap at the end vertex of this polyline.

• the end cap type.

Gets this polyline's id. The id will be unique amongst all Polylines on a map.

• this polyline's id.

Gets the joint type used at all vertices of the polyline except the start and end vertices. See JointType for possible values.

Gets the stroke pattern of this polyline.

• the stroke pattern, or null if default is used.

Returns a snapshot of the vertices of this polyline at this time . The list returned is a copy of the list of vertices and so changes to the polyline's vertices will not be reflected by this list, nor will changes to this list be reflected by the polyline. To change the vertices of the polyline, call setPoints(List).

Gets the cap at the start vertex of this polyline.

Gets the tag for the polyline.

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

Gets the width of this polyline.

• the width in screen pixels.

Gets the zIndex of this polyline.

• the zIndex of the polyline.

Gets whether each segment of the line is drawn as a geodesic or not.

• true if each segment is drawn as a geodesic; false if each segment is drawn as a straight line on the Mercator projection.

Gets the visibility of this polyline.

• this polyline's visibility.

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

Sets the color of this polyline.

Sets the cap at the end vertex of this polyline. The default end cap is ButtCap.

Sets whether to draw each segment of the line as a geodesic or not.

Sets the joint type for all vertices of the polyline except the start and end vertices.

See JointType for allowed values. The default value JointType.DEFAULT will be used if joint type is undefined or is not one of the allowed values.

Sets the stroke pattern of the polyline. The default stroke pattern is solid, represented by null.

Sets the points of this polyline. This method will take a copy of the points, so further mutations to points will have no effect on this polyline.

Sets spans of the polyline.

Sets the cap at the start vertex of this polyline. The default start cap is ButtCap.

Sets the tag for the polyline.

You can use this property to associate an arbitrary Object with this polyline. For example, the Object can contain data about what the polyline represents. This is easier than storing a separate Map<Polyline, 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 visibility of this polyline. When not visible, a polyline is not drawn, but it keeps all its other properties.

Sets the width of this polyline.

Sets the zIndex of this polyline. Polylines with higher zIndices are drawn above those with lower indices.

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."],[[["The `Polyline` class in the Android Maps SDK is used to represent lines drawn on a map, connecting a series of points."],["Polylines are customizable in terms of color, width, pattern, and shape, with control over start/end caps and joint types."],["Developers can control the visibility, clickability, and drawing order (z-index) of polylines on the map."],["Styling can be applied to individual segments of a polyline using `setSpans`, and arbitrary data can be associated with a polyline using `setTag`."],["All interactions with the `Polyline` object must occur on the Android UI thread."]]],[]]

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