只是多个接近警报的简单示例（绝不是完整的）_.zip

package co.uk.gauntface.android.proximityalerts; import java.util.ArrayList; import java.util.List; import co.uk.gauntface.android.proximityalerts.models.LatLonPair; import co.uk.gauntface.android.proximityalerts.receivers.ProximityAlert; import com.google.android.maps.MapActivity; import com.google.android.maps.MapView; import com.google.android.maps.MyLocationOverlay; import com.google.android.maps.Overlay; import com.google.android.maps.OverlayItem; import android.app.PendingIntent; import android.content.Context; import android.content.Intent; import android.content.IntentFilter; import android.graphics.drawable.Drawable; import android.location.LocationManager; import android.os.Bundle; public class ProximityDisplay extends MapActivity { private static final String PROXIMITY_INTENT_ACTION = new String("co.uk.gauntface.android.proximityalerts.action.PROXIMITY_ALERT"); private IntentFilter mIntentFilter; private ArrayList<LatLonPair> mPositions; private MapView mMapView; private MyLocationOverlay mLocOverlay; /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.map_display); mIntentFilter = new IntentFilter(PROXIMITY_INTENT_ACTION); createPositions(); registerIntents(); initMapView(); } protected void onResume() { super.onResume(); mLocOverlay.enableMyLocation(); registerReceiver(new ProximityAlert(), mIntentFilter); } protected void onPause() { super.onPause(); mLocOverlay.disableMyLocation(); } protected void onStop() { super.onStop(); mLocOverlay.disableMyLocation(); } private void createPositions() { mPositions = new ArrayList<LatLonPair>(); mPositions.add(new LatLonPair(51.4948, -0.1467)); mPositions.add(new LatLonPair(51.455814, -2.603125)); mPositions.add(new LatLonPair(53.475638,-2.242057)); } private void registerIntents() { for(int i = 0; i < mPositions.size(); i++) { LatLonPair latLon = mPositions.get(i); setProximityAlert(latLon.getLatitude(), latLon.getLongitude(), i+1, i); } } private void setProximityAlert(double lat, double lon, final long eventID, int requestCode) { // 100 meter radius float radius = 100f; // Expiration is 10 Minutes (10mins * 60secs * 1000milliSecs) long expiration = 600000; LocationManager locManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE); Intent intent = new Intent(PROXIMITY_INTENT_ACTION); intent.putExtra(ProximityAlert.EVENT_ID_INTENT_EXTRA, eventID); PendingIntent pendingIntent = PendingIntent.getBroadcast(getApplicationContext(), requestCode, intent, PendingIntent.FLAG_CANCEL_CURRENT); locManager.addProximityAlert(lat, lon, radius, expiration, pendingIntent); } private void initMapView() { mMapView = (MapView) findViewById(R.id.MapDisplayMapView); mLocOverlay = new MyLocationOverlay(getApplicationContext(), mMapView); List<Overlay> overlays = mMapView.getOverlays(); overlays.add(mLocOverlay); mMapView.setBuiltInZoomControls(true); addPositionOverlays(); } private void addPositionOverlays() { Drawable defaultMarker = getResources().getDrawable(R.drawable.map_marker); defaultMarker.setBounds(0, 0, defaultMarker.getIntrinsicWidth(), defaultMarker.getIntrinsicHeight()); OverlayList overlayList = new OverlayList(defaultMarker); for(int i = 0; i < mPositions.size(); i++) { LatLonPair latLon = mPositions.get(i); OverlayItem overlay = new OverlayItem(latLon.getGeoPoint(), "Title "+i, "Snippet "+1); overlayList.add(overlay); } List<Overlay> overlays = mMapView.getOverlays(); overlays.add(overlayList); } @Override protected boolean isRouteDisplayed() { return false; } }