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Showing content from https://developers.google.com/android/reference/com/google/android/gms/maps/model/Marker below:

Marker | Google Play services

An icon placed at a particular point on the map's surface. A marker icon is drawn oriented against the device's screen rather than the map's surface; i.e., it will not necessarily change orientation due to map rotations, tilting, or zooming.

A marker has the following properties:

Alpha: Sets the opacity of the marker. Defaults to 1.0.
Anchor: The point on the image that will be placed at the LatLng position of the marker. This defaults to 50% from the left of the image and at the bottom of the image.
Position: The LatLng value for the marker's position on the map. You can change this value at any time if you want to move the marker.
Title: A text string that's displayed in an info window when the user taps the marker. You can change this value at any time.
Snippet: Additional text that's displayed below the title. You can change this value at any time.
Icon: A bitmap that's displayed for the marker. If the icon is left unset, a default icon is displayed. You can specify an alternative coloring of the default icon using BitmapDescriptorFactory.defaultMarker(float).
Drag Status: If you want to allow the user to drag the marker, set this property to true. You can change this value at any time. The default is false.
Visibility: By default, the marker is visible. To make the marker invisible, set this property to false. You can change this value at any time.
Flat or Billboard: If the marker is flat against the map, it will always be drawn facing the camera and will rotate and tilt with the camera, unlike a GroundOverlay. If the marker is a billboard, it will remain stuck to the map as the camera rotates and tilts. As with flat markers, billboard markers retain their size when the map is zoomed in or out. The default is a billboard (false)
Rotation: The rotation of the marker in degrees clockwise about the marker's anchor point. The axis of rotation is perpendicular to the marker. A rotation of 0 corresponds to the default position of the marker. When the marker is flat on the map, the default position is North aligned and the rotation is such that the marker always remains flat on the map. When the marker is a billboard, the default position is pointing up and the rotation is such that the marker is always facing the camera. The default value is 0.
zIndex: The draw order for the marker. The markers are drawn in order of the zIndex, with the highest zIndex marker drawn on top. By setting the zIndex property for each marker, you can control which tap target your user is most likely to hit. The default value is 0.
Tag: An Object associated with the marker. For example, the Object can contain data about what the marker represents. This is easier than storing a separate Map<Marker, 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.

Example

GoogleMap map = ... // get a map.
 // Add a marker at San Francisco.
 Marker marker = map.addMarker(new MarkerOptions()
     .position(new LatLng(37.7750, 122.4183))
     .title("San Francisco")
     .snippet("Population: 776733"));

Developer Guide

For more information, read the Markers developer guide.

Public Method Summary boolean float getAlpha

()

Gets the alpha of the marker.

String getId

()

Gets this marker's id.

LatLng float String Object getTag

()

Gets the tag for the marker.

String getTitle

()

Gets the title of the marker.

float getZIndex

()

Returns the zIndex of the marker.

int void hideInfoWindow

()

Hides the info window if it is shown from this marker.

boolean boolean isFlat

()

Gets the flat setting of the Marker.

boolean isInfoWindowShown

()

Returns whether the info window is currently shown above this marker.

boolean isVisible

()

Gets the visibility setting of this marker.

void remove

()

Removes this marker from the map.

void setAlpha

(float alpha)

Sets the alpha (opacity) of the marker.

void setAnchor

(float anchorU, float anchorV)

Sets the anchor point for the marker.

void setDraggable

(boolean draggable)

Sets the draggability of the marker.

void setFlat

(boolean flat)

Sets whether this marker should be flat against the map true or a billboard facing the camera false.

void void setInfoWindowAnchor

(float anchorU, float anchorV)

Specifies the point in the marker image at which to anchor the info window when it is displayed.

void void setRotation

(float rotation)

Sets the rotation of the marker in degrees clockwise about the marker's anchor point.

void void void void setVisible

(boolean visible)

Sets the visibility of this marker.

void setZIndex

(float zIndex)

Sets the zIndex of the marker.

void Inherited Method Summary From class java.lang.Object Object

clone()

boolean void

finalize()

final Class<?>

getClass()

int

hashCode()

final void

notify()

final void

notifyAll()

String

toString()

final void

wait(long arg0, int arg1)

final void

wait(long arg0)

final void

wait()

Public Methods public boolean equals (Object other)

Tests if this Marker is equal to another.

Returns

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

public float getAlpha ()

Gets the alpha of the marker.

Returns

the alpha of the marker in the range [0, 1].

public String getId ()

Gets this marker's id. The id will be unique amongst all Markers on a map.

Returns

this marker's id.

public LatLng getPosition ()

Returns the position of the marker.

Returns

A LatLng object specifying the marker's current position.

public float getRotation ()

Gets the rotation of the marker.

Returns

the rotation of the marker in degrees clockwise from the default position.

public String getSnippet ()

Gets the snippet of the marker.

Returns

A string containing the marker's snippet, or null if no snippet has been set.

public Object getTag ()

Gets the tag for the marker.

Returns

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

public String getTitle ()

Gets the title of the marker.

Returns

A string containing the marker's title, or null if no title has been set.

public float getZIndex ()

Returns the zIndex of the marker.

Returns

this marker's zIndex.

public void hideInfoWindow ()

Hides the info window if it is shown from this marker.

This method has no effect if this marker is not visible.

public boolean isDraggable ()

Gets the draggability of the marker. When a marker is draggable, it can be moved by the user by long pressing on the marker.

Returns

true if the marker is draggable; otherwise, returns false.

public boolean isFlat ()

Gets the flat setting of the Marker.

Returns

true if the marker is flat against the map; false if the marker should face the camera.

public boolean isInfoWindowShown ()

Returns whether the info window is currently shown above this marker. This does not consider whether or not the info window is actually visible on screen.

public boolean isVisible ()

Gets the visibility setting of this marker. Note that this does not indicate whether the marker is within the screen's viewport. It indicates whether the marker will be drawn if it is contained in the screen's viewport.

Returns

this marker's visibility.

public void remove ()

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

public void setAlpha (float alpha)

Sets the alpha (opacity) of the marker. This is a value from 0 to 1, where 0 means the marker is completely transparent and 1 means the marker is completely opaque.

public void setAnchor (float anchorU, float anchorV)

Sets the anchor point for the marker.

The anchor specifies the point in the icon image that is anchored to the marker's position on the Earth's surface.

The anchor point is specified in the continuous space [0.0, 1.0] x [0.0, 1.0], where (0, 0) is the top-left corner of the image, and (1, 1) is the bottom-right corner. The anchoring point in a W x H image is the nearest discrete grid point in a (W + 1) x (H + 1) grid, obtained by scaling the then rounding. For example, in a 4 x 2 image, the anchor point (0.7, 0.6) resolves to the grid point at (3, 1).

 *-----+-----+-----+-----*
 |     |     |     |     |
 |     |     |     |     |
 +-----+-----+-----+-----+
 |     |     |   X |     |   (U, V) = (0.7, 0.6)
 |     |     |     |     |
 *-----+-----+-----+-----*

 *-----+-----+-----+-----*
 |     |     |     |     |
 |     |     |     |     |
 +-----+-----+-----X-----+   (X, Y) = (3, 1)
 |     |     |     |     |
 |     |     |     |     |
 *-----+-----+-----+-----*

Parameters anchorU u-coordinate of the anchor, as a ratio of the image width (in the range [0, 1]). anchorV v-coordinate of the anchor, as a ratio of the image height (in the range [0, 1]). public void setDraggable (boolean draggable)

Sets the draggability of the marker. When a marker is draggable, it can be moved by the user by long pressing on the marker.

public void setFlat (boolean flat)

Sets whether this marker should be flat against the map true or a billboard facing the camera false.

public void setIcon (BitmapDescriptor iconDescriptor)

Sets the icon for the marker.

Parameters iconDescriptor if null, the default marker is used. public void setInfoWindowAnchor (float anchorU, float anchorV)

Specifies the point in the marker image at which to anchor the info window when it is displayed. This is specified in the same coordinate system as the anchor. See setAnchor(float, float) for more details. The default is the top middle of the image.

Parameters anchorU u-coordinate of the info window anchor, as a ratio of the image width (in the range [0, 1]). anchorV v-coordinate of the info window anchor, as a ratio of the image height (in the range [0, 1]). public void setPosition (LatLng latlng)

Sets the location of the marker.

public void setRotation (float rotation)

Sets the rotation of the marker in degrees clockwise about the marker's anchor point. The axis of rotation is perpendicular to the marker. A rotation of 0 corresponds to the default position of the marker.

public void setSnippet (String snippet)

Sets the snippet of the marker.

Parameters snippet if null, the snippet is cleared. public void setTag (Object tag)

Sets the tag for the marker.

You can use this property to associate an arbitrary Object with this marker. For example, the Object can contain data about what the marker represents. This is easier than storing a separate Map<Marker, 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.

Parameters tag if null, the tag is cleared. public void setTitle (String title)

Sets the title of the marker.

Parameters title if null, the title is cleared. public void setVisible (boolean visible)

Sets the visibility of this marker. If set to false and an info window is currently showing for this marker, this will hide the info window.

public void setZIndex (float zIndex)

Sets the zIndex of the marker.

public void showInfoWindow ()

Shows the info window of this marker on the map, if this marker isVisible().

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