Maps in android
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The document discusses how to integrate Google Maps into Android applications. It describes the key classes used to display maps like MapView and MapActivity. It explains how to obtain an API key, set up the permissions, and add a MapView to the layout. Code samples are provided to display maps, control zooming and panning, and retrieve the center point and visible area.
![[1]Wei-Meng Lee, “Beginning Android
Application Development”, Wiley Publishing
Inc.
Created by Sumita Das](https://image.slidesharecdn.com/mapsinandroid-160914024504/85/Maps-in-android-12-320.jpg)
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Maps in android
- 1. MAPS IN ANDROID By- Sumita Das
- 2. Android allows us to integrate Google maps in our application. Customize the map according to your choices. Created by Sumita Das
- 3. Several classes that are used to support Android maps: MapView: User interface element that displays the map. MapActivity: Base class used to create an Activity that can include a Map View. Overlay: Class used to annotate your maps MapController: Used to control the map, and enables the user to set the center location and zoom levels. MyLocationOverlay: Can be used to display the current position and orientation of the device. Created by Sumita Das
- 4. Obtain an API key from the Android developer website at http://code.google.com/android/maps-api-signup.html. To obtain a key, you need to specify the MD5 fingerprint of the certificate used to sign your application. . Created by Sumita Das
- 5. To use maps- extend MapActivity. The layout for the new class must then include a MapView to display a Google Maps interface element. Android maps library - optional API. So it must be explicitly included in the application manifest before it can be used. <uses-library android:name=”com.google.android.maps”/> Created by Sumita Das
- 6. Map View : -Downloads its map tiles on demand - Any application that features a Map View needs to include a uses-permission for Internet access. Add a uses-permission tag to your application manifest for INTERNET, as shown here: After adding the library and configuring your permission, you’re ready to create your new map-based Activity. <uses-permission android:name=”android.permission.INTERNET”/> Created by Sumita Das
- 8. import com.google.android.maps.MapActivity; // import classes import com.google.android.maps.MapController; import com.google.android.maps.MapView; import android.os.Bundle; public class MyMapActivity extends MapActivity { private MapView mapView; private MapController mapController; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.map_layout); mapView = (MapView)findViewById(R.id.map_view); } @Override protected boolean isRouteDisplayed() { // IMPORTANT: This method must return true if your Activity is displaying driving directions. Otherwise return false. return false; }} Created by Sumita Das
- 9. Created by Sumita Das
- 10. 1. To display a satellite view and the expected traffic overlay: mapView.setSatellite(true); mapView.setTraffic(true); 2. To find the current and maximum available zoom levels: int maxZoom = mapView.getMaxZoomLevel(); int currentZoom = mapView.getZoomLevel(); Created by Sumita Das
- 11. 3. To obtain center point and currently visible longitude and latitude span (in decimal degrees). GeoPoint center = mapView.getMapCenter(); int latSpan = mapView.getLatitudeSpan(); int longSpan = mapView.getLongitudeSpan(); Created by Sumita Das
- 12. [1]Wei-Meng Lee, “Beginning Android Application Development”, Wiley Publishing Inc. Created by Sumita Das
Editor's Notes
- #3: Show any location on the map , or show different routes on the map. Map Views offer full programmatic control of the map display, letting you control the zoom, location, and display modes including the option to display a satellite view
- #5: To use a Map View in your application, you must first Without an API key the Map View cannot download the tiles used to display the map.