Error while applying overlay on a location on a Google map in Android
- by Hiccup
This is my Activity for getting Location:
public class LocationActivity extends MapActivity{
Bundle bundle = new Bundle();
MapView mapView;
MapController mc;
GeoPoint p;
ArrayList <String> address = new ArrayList<String>();
List<Address> addresses;
private LocationManager locationManager;
double lat, lng;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.map);
mapView = (MapView) findViewById(R.id.mapView1);
mapView.displayZoomControls(true);
mc = mapView.getController();
LocationManager lm = (LocationManager)getSystemService(Context.LOCATION_SERVICE);
Criteria criteria = new Criteria();
// criteria.setAccuracy(Criteria.ACCURACY_FINE);
criteria.setAltitudeRequired(false);
criteria.setBearingRequired(false);
criteria.setCostAllowed(true);
String strLocationProvider = lm.getBestProvider(criteria, true);
//Location location = lm.getLastKnownLocation(strLocationProvider);
Location location = lm.getLastKnownLocation(LocationManager.NETWORK_PROVIDER);
lat = (double) location.getLatitude();
lng = (double) location.getLongitude();
p = new GeoPoint(
(int) (lat * 1E6),
(int) (lng * 1E6));
mc.animateTo(p);
mc.setZoom(17);
MapOverlay mapOverlay = new MapOverlay();
List<Overlay> listOfOverlays = mapView.getOverlays();
listOfOverlays.clear();
listOfOverlays.add(mapOverlay);
Geocoder gcd = new Geocoder(this, Locale.getDefault());
try {
addresses = gcd.getFromLocation(lat,lng,1);
if (addresses.size() > 0 && addresses != null) {
address.add(addresses.get(0).getFeatureName());
address.add(addresses.get(0).getAdminArea());
address.add(addresses.get(0).getCountryName());
bundle.putStringArrayList("id1", address);
}
bundle.putDouble("lat", lat);
bundle.putDouble("lon", lng);
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
class MapOverlay extends com.google.android.maps.Overlay
{
@Override
public boolean draw(Canvas canvas, MapView mapView,
boolean shadow, long when)
{
super.draw(canvas, mapView, shadow);
//---translate the GeoPoint to screen pixels---
Point screenPts = new Point();
mapView.getProjection().toPixels(p, screenPts);
//---add the marker---
Bitmap bmp = BitmapFactory.decodeResource(
getResources(), R.drawable.logo);
canvas.drawBitmap(bmp, screenPts.x, screenPts.y-50, null);
return true;
}
@Override
public boolean onTouchEvent(MotionEvent event, MapView mapView)
{
//---when user lifts his finger---
if (event.getAction() == 1) {
Bundle bundle = new Bundle();
ArrayList <String> address = new ArrayList<String>();
GeoPoint p = mapView.getProjection().fromPixels(
(int) event.getX(),
(int) event.getY());
Geocoder geoCoder = new Geocoder(
getBaseContext(), Locale.getDefault());
try {
List<Address> addresses = geoCoder.getFromLocation(
p.getLatitudeE6() / 1E6,
p.getLongitudeE6() / 1E6, 1);
addOverLay();
MapOverlay mapOverlay = new MapOverlay();
Bitmap bmp = BitmapFactory.decodeResource(
getResources(), R.drawable.crumbs_logo);
List<Overlay> listOfOverlays = mapView.getOverlays();
listOfOverlays.clear();
listOfOverlays.add(mapOverlay);
String add = "";
if (addresses.size() > 0)
{
address.add(addresses.get(0).getFeatureName());
address.add(addresses.get(0).getLocality());
address.add(addresses.get(0).getAdminArea());
address.add(addresses.get(0).getCountryName());
bundle.putStringArrayList("id1", address);
for(int i = 0; i <= addresses.size();i++)
add += addresses.get(0).getAddressLine(i) + "\n";
}
bundle.putDouble("lat", p.getLatitudeE6() / 1E6);
bundle.putDouble("lon", p.getLongitudeE6() / 1E6);
Toast.makeText(getBaseContext(), add, Toast.LENGTH_SHORT).show();
}
catch (IOException e) {
e.printStackTrace();
}
return true;
}
else
return false;
}
}
public void onClick_mapButton(View v)
{
Intent intent = this.getIntent();
this.setResult(RESULT_OK, intent);
intent.putExtras(bundle);
finish();
}
public void addOverLay()
{
MapOverlay mapOverlay = new MapOverlay();
List<Overlay> listOfOverlays = mapView.getOverlays();
listOfOverlays.clear();
listOfOverlays.add(mapOverlay);
}
@Override
protected boolean isRouteDisplayed() {
// TODO Auto-generated method stub
return false;
}
public void FindLocation() {
LocationManager locationManager = (LocationManager) this
.getSystemService(Context.LOCATION_SERVICE);
LocationListener locationListener = new LocationListener() {
public void onLocationChanged(Location location) {
// updateLocation(location);
Toast.makeText(
LocationActivity.this,
String.valueOf(lat) + "\n"
+ String.valueOf(lng), 5000)
.show();
}
public void onStatusChanged(String provider, int status,
Bundle extras) {
}
public void onProviderEnabled(String provider) {
}
public void onProviderDisabled(String provider) {
}
};
locationManager.requestLocationUpdates(
LocationManager.NETWORK_PROVIDER, 0, 0, locationListener);
}
}
I face two problems here. One is that when I click (do a tap) on any location, the overlay is not changing to that place. Also, the app crashes when I am on the MapView page and I click on back button. What might be the error?
