1. Android Application Development
Google Maps API V2 Part 3
● Add Markers
● Drawing Shapes
(Lines, Polygons &
Circles)
Ahsanul Karim
karim.ahsanul@gmail.com
http://droidtraining.wordpress.com
2. Google Maps API V2 Markers [1]
1. Markers identify locations on the map.
2. Markers use a standard icon.
3. It's possible to change the icon's color,
image or anchor point via the API.
4. Markers are objects of type Marker, and
are added to the map with the GoogleMap.
addMarker(markerOptions) method.
5. Markers are designed to be interactive.
Markers receive click events, for example,
and are often used within event listeners to
bring up info windows.
4. Google Maps API V2 Markers [3]
Customize a Marker:
Position (Required): The LatLng value for the marker's position on the map. This
is the only required property for a Marker object.
Title: A string that's displayed in the info window when the user taps the marker.
Snippet: Additional text that's displayed below the title.
Draggable: Set to true if you want to allow the user to move the marker. Defaults
to false.
Visible: Set to false to make the marker invisible. Defaults to true.
Anchor: The point on the image that will be placed at the LatLng position of the
marker. This defaults to the middle of the bottom of the image.
Icon: A bitmap that's displayed in place of the default marker image. You can't
change the icon once you've created the marker.
5. Google Maps API V2 Markers [4]
Customize a Marker: Changing default Icon
1. fromAsset(String assetName)
2. fromBitmap (Bitmap image)
3. fromFile (String path)
4. fromResource (int resourceId)
6. Google Maps API V2 Markers [5]
Event Handling
The following events can be listened to:
1. Marker click events
2. Marker drag events
3. Info window click events
7. Google Maps API V2 Shapes
The Google Maps API for Android offers some simple ways for us to
add shapes to our maps in order to customize them for your
application.
● A Polyline is a series of connected line segments that can form any
shape you want and can be used to mark paths and routes on the
map.
● A Polygon is an enclosed shape that can be used to mark areas on
the map.
● A Circle is a geographically accurate projection of a circle on the
Earth's surface drawn on the map.
![Google Maps API V2 Markers [1]
1. Markers identify locations on the map.
2. Markers use a standard icon.
3. It's possible to change the icon's color,
image or anchor point via the API.
4. Markers are objects of type Marker, and
are added to the map with the GoogleMap.
addMarker(markerOptions) method.
5. Markers are designed to be interactive.
Markers receive click events, for example,
and are often used within event listeners to
bring up info windows.](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)