Adding Current location of the device on Google maps.

Using MyLocationOverlay class, current location of the device can be depicted on the Map.

Add the following permissions to the Android Manifest File:

<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />

Adding a mapView to your application, these few lines of code should be present in the XML layout. The Id of the map view is 'map'.

	<com.google.android.maps.MapView
	android:id="@+id/map"
	android:layout_width="fill_parent"
	android:layout_height="wrap_content"
	android:layout_below="@id/map_location_button"
	android:layout_above="@+id/use_this_location_button"
	android:clickable="true"
	android:apiKey = "Your API Key Should be placed here"/>

In the Java class for the activity which displays the map View, add a field:

	private MyLocationOverlay myLocationOverlay;

Also, get a handle to the map view defined in the XML and add a MyLocationOverlay. After that call the invalidate() method.

	mapView = (MapView)findViewById(R.id.map);
	myLocationOverlay = new MyLocationOverlay(this, mapView);
	mapView.getOverlays().add(myLocationOverlay);
	mapView.invalidate();

To prevent depletion of battery, in the onPause method of the class, disableMyLocation() method should be called.

@Override
	protected void onPause() {
	        super.onPause();
		myLocationOverlay.disableMyLocation();
	}

	@Override
	protected void onResume() {
		super.onResume();
		myLocationOverlay.enableMyLocation();
	}