It's for a school project. No matter how much i've tried changing the value or the command it just loads the map and move only a little bit (not even zooming) it's suppoesd to be a running app that tracks your location at real time , it's not really neccesery but i want it to zoom in on the user's location when he opens the map
public class Map extends AppCompatActivity {
boolean hasCenteredOnce = false;
MyLocationNewOverlay mLocationOverlay;
MapView map;
LocationManager locationManager;
LocationListener locationListener;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
Configuration.getInstance().setUserAgentValue(getPackageName());
setContentView(R.layout.activity_map);
if (ContextCompat.checkSelfPermission(this,
Manifest.permission.ACCESS_FINE_LOCATION)
!= PackageManager.PERMISSION_GRANTED) {
ActivityCompat.requestPermissions(this,
new String[]{Manifest.permission.ACCESS_FINE_LOCATION}, 1);
}
map = findViewById(R.id.map);
map.setMultiTouchControls(true);
int size = 60;
Bitmap bitmap = Bitmap.createBitmap(size, size, Bitmap.Config.ARGB_8888);
Canvas canvas = new Canvas(bitmap);
Paint paint = new Paint();
paint.setColor(Color.RED);
paint.setStyle(Paint.Style.FILL);
paint.setAntiAlias(true);
canvas.drawCircle(size / 2f, size / 2f, size / 2.5f, paint);
mLocationOverlay = new MyLocationNewOverlay(new GpsMyLocationProvider(this), map);
mLocationOverlay.enableMyLocation();
mLocationOverlay.enableFollowLocation(); // This makes the map follow the user
mLocationOverlay.setDrawAccuracyEnabled(true); // Shows the blue circle accuracy
mLocationOverlay.setPersonIcon(bitmap);
mLocationOverlay.setDirectionIcon(bitmap);
map.getOverlays().add(mLocationOverlay);
locationManager = (LocationManager) getSystemService(LOCATION_SERVICE);
locationListener = location -> {
double lat = location.getLatitude();
double lon = location.getLongitude();
GeoPoint userPoint = new GeoPoint(lat, lon);
// 2. Only zoom and snap the first time location is found
// This prevents the map from "jumping" while the user is trying to look around
if (!hasCenteredOnce) {
map.getController().setCenter(userPoint);
map.getController().setZoom(17.0);
map.getController().animateTo(userPoint);
hasCenteredOnce = true;
}
};
}
@Override
protected void onResume() {
super.onResume();
map.onResume();
mLocationOverlay.enableMyLocation();
mLocationOverlay.enableFollowLocation();
if (ContextCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION)
== PackageManager.PERMISSION_GRANTED) {
try {
locationManager.requestLocationUpdates(
LocationManager.NETWORK_PROVIDER,
2000,
2,
locationListener);
} catch (SecurityException e) {
e.printStackTrace();
}
}
}
Instead of relying on LocationManager, let MyLocationNewOverlay notify you when the first location is available.
Replace your manual listener logic with this:
mLocationOverlay = new MyLocationNewOverlay(new GpsMyLocationProvider(this), map);
mLocationOverlay.enableMyLocation();
mLocationOverlay.setDrawAccuracyEnabled(true);
mLocationOverlay.setPersonIcon(bitmap);
mLocationOverlay.setDirectionIcon(bitmap);
map.getOverlays().add(mLocationOverlay);
mLocationOverlay.runOnFirstFix(() -> {
runOnUiThread(() -> {
GeoPoint userPoint = mLocationOverlay.getMyLocation();
if (userPoint != null) {
map.getController().setZoom(18.0);
map.getController().animateTo(userPoint);
}
});
});
This waits until GPS actually returns a location before zooming.
Also,
Remove enableFollowLocation(). Since you're manually centering:
mLocationOverlay.enableFollowLocation();
Remove it, because it overrides your map controller.
Also,
Remove the LocationManager code. MyLocationNewOverlay already handles GPS updates internally.
So delete:
locationManager
locationListener
requestLocationUpdates()