How do you access google maps API from a Java application?
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5 Answers
You can use Swing-WS, a component JXMapViewer is available and provides similar functionality as JavaScript version. However it is still not legal to access Google tile servers outside the provided APIs : JavaScript and Flash.
There is an issue opened to track this request : http://code.google.com/p/gmaps-api-issues/issues/detail?id=1396. It is approved but who knows when it's gonna be available.
Comments
Your best bet for client side Java would be the Static Maps API. For server-side Java, the answer will heavily depend on what framework you are using for development. Having said that, the Google Maps API is well documented.
Comments
you can use Swing Labs, JXMapKit from swingx: http://today.java.net/pub/a/today/2007/10/30/building-maps-into-swing-app-with-jxmapviewer.html
It is pretty straight forward. For more info refer to the website.
JXMapKit mapView = new JXMapKit();
mapView.setDefaultProvider(DefaultProviders.OpenStreetMaps);
mapView.setDataProviderCreditShown(true);
add(mapView)
It will look like this:
(source: java.net)
Take a look at the source code in the article above, with three lines of code, you can view a map easily:
Comments
if you are looking for just a static map the you can use this code to get the map working:
import java.awt.BorderLayout;
public class GoogleMapsGui extends JFrame {
final Logger log = Logger.getLogger(GoogleMapsGui.class.getName());
private JPanel contentPane;
/**
* Launch the application.
*/
public static void main(String[] args) {
EventQueue.invokeLater(new Runnable() {
public void run() {
try {
GoogleMapsGui frame = new GoogleMapsGui();
frame.setVisible(true);
} catch (Exception e) {
e.printStackTrace();
}
}
});
}
/**
* Create the frame.
*/
public GoogleMapsGui() {
setTitle("Map");
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setBounds(100, 100, 592, 352);
contentPane = new JPanel();
contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));
setContentPane(contentPane);
JFrame test = new JFrame("Google Maps");
try {
// String latitude = "-25.9994652";
// String longitude = "28.3112051";
String location = JOptionPane
.showInputDialog(" please enter the desired loccation");// get
// the
// location
// for
// geo
// coding
Scanner sc = new Scanner(location);
Scanner sc2 = new Scanner(location);
String marker = "";
String path = JOptionPane
.showInputDialog("what is your destination?");
String zoom = JOptionPane
.showInputDialog("how far in do you want to zoom?\n"
+ "12(zoomed out) - 20 (zoomed in)");
String imageUrl = "https://maps.googleapis.com/maps/api/staticmap?";
while (sc.hasNext()) {// add location to imageUrl
imageUrl = imageUrl + sc.next();
}
marker = "&markers=color:red|";
while (sc2.hasNext()) {// add marker location to marker
marker = marker + sc2.next() + ",";
}
marker = marker.substring(0, marker.length() - 1);
imageUrl = imageUrl + "&size=620x620&scale=2&maptype=hybrid"
+ marker;
//
log.info("Generated url");
String destinationFile = "image.jpg";
// read the map image from Google
// then save it to a local file: image.jpg
//
URL url = new URL(imageUrl);
InputStream is = url.openStream();
OutputStream os = new FileOutputStream(destinationFile);
byte[] b = new byte[2048];
int length;
while ((length = is.read(b)) != -1) {
os.write(b, 0, length);
}
log.info("Created image.jpg");
is.close();
os.close();
sc.close();
sc2.close();
log.info("Closed util's");
} catch (IOException e) {
e.printStackTrace();
System.exit(1);
log.severe("Could not create image.jpg");
}// fin getting and storing image
ImageIcon imageIcon = new ImageIcon((new ImageIcon("image.jpg"))
.getImage().getScaledInstance(630, 600,
java.awt.Image.SCALE_SMOOTH));
contentPane.setLayout(null);
JLabel imgMap = new JLabel(imageIcon);
imgMap.setBounds(5, 5, 571, 308);
contentPane.add(imgMap);
}
}
also check out the Goolge static maps API here
Comments
You can use official Java Client for Google Maps
<dependency>
<groupId>com.google.maps</groupId>
<artifactId>google-maps-services</artifactId>
<version>2.2.0</version>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-simple</artifactId>
<version>1.7.25</version>
</dependency>
Here's an example how to access Google Maps Places API
public static List<PlacesSearchResult> nearbySearch(double lat, double lng, int radiusInMeters) {
List<PlacesSearchResult> results = new ArrayList<>();
try {
GeoApiContext ctx = new GeoApiContext.Builder().apiKey(API_KEY).build();
PlacesSearchResponse response = PlacesApi.nearbySearchQuery(ctx, new LatLng(lat, lng))
.type(PlaceType.RESTAURANT)
.radius(radiusInMeters)
.await();
results.addAll(Arrays.asList(response.results));
int page = 1; // Google Maps API provides maximum 60 results by search (3 pages maximum, each containing 20 records)
while (response.nextPageToken != null && !response.nextPageToken.isBlank() && response.results.length == 20 && page <= 2) {
Thread.sleep(3000); // Google has SLA for no more than N requests per second in free tier
response = PlacesApi.nearbySearchNextPage(ctx, response.nextPageToken).await();
results.addAll(Arrays.asList(response.results));
page++;
Thread.sleep(2000);
}
} catch (ApiException e) {
logger.error("ApiException: ", e);
} catch (InterruptedException e) {
logger.error("InterruptedException: ", e);
} catch (IOException e) {
logger.error("IOException: ", e);
}
return results;
}
for findPlace
public static PlacesSearchResult[] findPlace(double lat, double lng) {
GeoApiContext ctx = new GeoApiContext.Builder().apiKey(API_KEY).build();
FindPlaceFromText response = null;
try {
response = PlacesApi.findPlaceFromText(ctx, "restaurants", FindPlaceFromTextRequest.InputType.TEXT_QUERY)
.fields(
FindPlaceFromTextRequest.FieldMask.NAME,
FindPlaceFromTextRequest.FieldMask.FORMATTED_ADDRESS,
FindPlaceFromTextRequest.FieldMask.RATING,
FindPlaceFromTextRequest.FieldMask.OPENING_HOURS)
.locationBias(new FindPlaceFromTextRequest.LocationBiasCircular(new LatLng(lat, lng), 10000))
.await();
} catch (ApiException e) {
logger.error("ApiException: ", e);
} catch (InterruptedException e) {
logger.error("InterruptedException: ", e);
} catch (IOException e) {
logger.error("IOException: ", e);
}
return response != null ? response.candidates : null;
}
