Create a Radius Around a Point in Google Map

Question : How do I create a 9000 meters buffer radius from a point and display placemarks that intersect that buffer.
Answer : Google Map API for android has a class that reads and draw your current location in the map.
That class is "MyLocationOverlay". The class has a "draw" method that will be called everytime user pan or zoom on the map.
So to draw a circle radius of your current location, we need to extends this class and override its draw method.

Then, we create our view, one map view, one textbox and one button

After that, we need to create our main class. TukangAndroidApp.java

Dont forget to edit AndroidManifest.xml to add permissions and google map library

Run your application.
Tips : Set the GPS location from the DDMS first before you press Search, otherwise you will encounter NullPointerException
If all goes well, your application will be like this

Notice in TukangAndroidApp.java, our displayResult method didnt do anything, so we will implement the method to return some placemarks that intersect our buffer.
First, we should extends ItemizedOverlay class to create our placemark


Next, we will implement the displayResult method.
Our last TukangAndroidApp.java should look like this

Run the application, and you can see that our application will work well.

Have fun!