I have a map which is loading a current address from a server. I am using on MapReady, and before its initialized it loads the first location from the server and zooms to the location. I want the app to be reading the address from the server every 10 seconds, and mapping the location. I am stuck after on MapReady on how I can remove the previous marker add the new marker from values from the server and still zoom on the location, the tutorials I have read like this haven't been so helpful. Below is my on MapReady.
#Override
public void onMapReady(GoogleMap googleMap) {
mMap = googleMap;
mMap.setMapType(GoogleMap.MAP_TYPE_NORMAL);
if (ActivityCompat.checkSelfPermission(getActivity(), Manifest.permission.ACCESS_FINE_LOCATION)
!= PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(getActivity(),
Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
return;
}
mMap.setMyLocationEnabled(true);
mMap.setTrafficEnabled(true);
mMap.setIndoorEnabled(true);
mMap.setBuildingsEnabled(true);
mMap.getUiSettings().setZoomControlsEnabled(true);
LocationManager locationManager = (LocationManager) getContext().getSystemService(Context.LOCATION_SERVICE);
Criteria criteria = new Criteria();
geocoder = new Geocoder(getActivity());
try {
ArrayList<Address> current_adresses = (ArrayList<Address>) geocoder.getFromLocationName(current_location, 1);
for(Address add : current_adresses){
if (current_adresses != null) {//Controls to ensure it is right address such as country etc.
current_longitude = add.getLongitude();
current_latitude = add.getLatitude();
}
}
ArrayList<Address> to_adresses = (ArrayList<Address>) geocoder.getFromLocationName(destination, 1);
for(Address add : to_adresses){
if (to_adresses != null) {//Controls to ensure it is right address such as country etc.
to_longitude = add.getLongitude();
to_latitude = add.getLatitude();
}
}
} catch (IOException e) {
e.printStackTrace();
}
location = locationManager.getLastKnownLocation(locationManager.getBestProvider(criteria, false));
if (location != null)
{
mMap.addMarker(new MarkerOptions()
.position(new LatLng(current_latitude, current_longitude))
.title(first_name + ", " + vehicle)
.icon(BitmapDescriptorFactory.fromResource(R.drawable.pickup)));
mMap.addMarker(new MarkerOptions()
.position(new LatLng(to_latitude, to_longitude))
.title("Destination")
.icon(BitmapDescriptorFactory.fromResource(R.drawable.office_building)));
CameraPosition cameraPosition= new CameraPosition.Builder()
.target(getCenterCoordinate())
.zoom(13)
.build();
CameraUpdate camUpd3 = CameraUpdateFactory.newCameraPosition(cameraPosition);
mMap.animateCamera(camUpd3);
//AsyncTask to get new address
getTransporterLocation();
/**
*
* I want to set a timer with the AsyncTask inside,
*
* remove the previous marker, convert the new address to lat and long
*
* map the marker and zoom in
*
*/
}
}
You just need to call
mMap.clear();
and repeat your steps for drawing markers.
Related
I am developing an android google map application, that is showing current location on map starting.
I have an search bar in the application, when user enter any area name, then the second marker will be placed on that location.
Now my problem is, how to get second marker longitude and latitude position and make a route between the two markers.
my MainActivity.java code as follows:
public class MainActivity extends FragmentActivity implements OnMapReadyCallback {
private GoogleMap mMap;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_maps);
// Obtain the SupportMapFragment and get notified when the map is ready to be used.
SupportMapFragment mapFragment = (SupportMapFragment) getSupportFragmentManager()
.findFragmentById(R.id.map);
mapFragment.getMapAsync(this);
}
public void onMapSearch(View view) {
EditText locationSearch = (EditText) findViewById(R.id.editText);
String location = locationSearch.getText().toString();
List<Address> addressList = null;
if (location != null || !location.equals("")) {
Geocoder geocoder = new Geocoder(this);
try {
addressList = geocoder.getFromLocationName(location, 1);
} catch (IOException e) {
e.printStackTrace();
}
Address address = addressList.get(0);
LatLng latLng = new LatLng(address.getLatitude(), address.getLongitude());
mMap.addMarker(new MarkerOptions().position(latLng).title("Marker"));
mMap.animateCamera(CameraUpdateFactory.newLatLng(latLng));
}
}
#Override
public void onMapReady(GoogleMap googleMap) {
mMap = googleMap;
// Add a marker in Sydney and move the camera
LatLng sydney = new LatLng(27.746974, 85.301582);
mMap.addMarker(new MarkerOptions().position(sydney).title("Kathmandu, Nepal"));
mMap.moveCamera(CameraUpdateFactory.newLatLng(sydney));
if (ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
return;
}
// Enable MyLocation Button in the Map
mMap.setMyLocationEnabled(true);
}
}
Please Help me.
In your program you have used the code to get the LatLng of the second marker.
LatLng latLng = new LatLng(address.getLatitude(), address.getLongitude());
mMap.addMarker(new MarkerOptions().position(latLng).title("Marker"));
To make a polyline, refer to this link. By the this question has already been answered.
https://www.simplifiedcoding.net/google-maps-distance-calculator-google-maps-api/
Set Google Places API for search EdiText. Get the value from that and pass it as address..
Here is the code(address denoting strAddress here)
List<Address> address = null;
Geocoder coder = new Geocoder(getApplicationContext());
try {
address = coder.getFromLocationName(strAddress, 1);
} catch (IOException e) {
e.printStackTrace();
}
if (address != null) {
Address location = address.get(0);
double lat = location.getLatitude();
double log = location.getLongitude();
}
Ive added reverse Geocoding to my map and set the map to clickable. Everything works as it should except the address is not showing above the marker when i click the map.
my latLan is an array but thats the only way it would allow me to use the variable. i think the problem lies around this area but cant put my hand on it.
#Override
public void onMapReady(GoogleMap googleMap) {
mMap = googleMap;
mMap.setMapType(GoogleMap.MAP_TYPE_HYBRID); // changes view to hybrid
mMap.setMyLocationEnabled(true); // shows location on map
locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
Location location = locationManager.getLastKnownLocation(LocationManager.GPS_PROVIDER); // uses GPS only to get location
double currentLatitude = location.getLatitude();
double currentLongitude = location.getLongitude();
final LatLng[] latLng = {(new LatLng(currentLatitude, currentLongitude))};
mMap.animateCamera(
CameraUpdateFactory.newLatLngZoom(latLng[0], 18)); // This will zoom camera to updated lat and long without constant updates
mMap.setOnMapClickListener(new GoogleMap.OnMapClickListener() {// Setting a click event handler for the map
#Override
public void onMapClick(LatLng arg0) {
Location location = locationManager.getLastKnownLocation(LocationManager.GPS_PROVIDER); // uses GPS only to get location
double currentLatitude = location.getLatitude();
double currentLongitude = location.getLongitude();
//LatLng latLng;
// Getting the Latitude and Longitude of the touched location
latLng[0] = arg0;
// Clears the previously touched position
mMap.clear();
// Animating to the touched position
mMap.animateCamera(CameraUpdateFactory.newLatLng(latLng[0]));
// Creating a marker
markerOptions = new MarkerOptions();
// Setting the position for the marker
markerOptions.position(latLng[0]);
// Placing a marker on the touched position
mMap.addMarker(markerOptions);
// Adding Marker on the touched location with address
new ReverseGeocodingTask(getBaseContext()).execute(latLng[0]);
}
});
//new ReverseGeocodingTask(getBaseContext()).execute(latLng);
}
private class ReverseGeocodingTask extends AsyncTask<LatLng, Void, String> {
Context mContext;
public ReverseGeocodingTask(Context context) {
super();
mContext = context;
}
#Override
protected String doInBackground(LatLng... params) {
Geocoder geocoder = new Geocoder(mContext);
double latitude = params[0].latitude;
double longitude = params[0].longitude;
List<android.location.Address> addresses = null;
String addressText = "";
try {
addresses = geocoder.getFromLocation(latitude, longitude, 1);
} catch (IOException e) {
e.printStackTrace();
}
if (addresses != null && addresses.size() > 0) {
android.location.Address address = addresses.get(0);
addressText = String.format("%s, %s, %s", address.getMaxAddressLineIndex() > 0 ?
address.getAddressLine(0) : "", address.getLocality(), address.getCountryName());
}
return addressText;
}
#Override
protected void onPostExecute(String addressText) {
markerOptions.title(addressText);
mMap.addMarker(markerOptions);
}
}
}
Tested your code and found possible cause of error.
// Placing a marker on the touched position
mMap.addMarker(markerOptions);
Upon implementing addMarker() before doing the ReverseGeocodingTask() and calling addMarker() again in the onPostExecute(). You can try adding an custom marker image large enough to make the address and the overwriting marker visible.
Customize the marker image
You can replace the default marker image with a custom marker image, often called an icon. Custom icons are always set as a BitmapDescriptor, and defined using one of four methods in the BitmapDescriptorFactory class.
Code for custom image:
private static final LatLng MELBOURNE = new LatLng(-37.813, 144.962);
private Marker melbourne = mMap.addMarker(new MarkerOptions()
.position(MELBOURNE)
.title("Melbourne")
.snippet("Population: 4,137,400")
.icon(BitmapDescriptorFactory.fromResource(R.drawable.arrow)));
You can remove the first mMap.addMarker(markerOptions); before new ReverseGeocodingTask(getBaseContext()).execute(latLng[0]); then it your app will work as it should be.
Use This Code May be work for getting Address
if (addresses != null && addresses.size() > 0) {
Address address = addresses.get(0);
String addressLine = address.getAddressLine(0) + address.getAddressLine(1) + address.getAddressLine(2) + address.getAddressLine(3);
}
been trying for a while to sort my maps problem, which is the marker. every time the map updates it adds a new marker. this leaves several markers on the same location.
I want to get this sorted before adding other content like directions.
public void onMapReady(GoogleMap googleMap) {
mMap = googleMap;
if (ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
// TODO: Consider calling
return;//
}
mMap.setMyLocationEnabled(true); // shows location on map
locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
listener = new LocationUpdateListener();
locationManager.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, 0, 0, listener);
locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0, listener);
}
private void handleNewLocation(Location location) {
Log.d(TAG, location.toString());
double currentLatitude = location.getLatitude();
double currentLongitude = location.getLongitude();
LatLng latLng = new LatLng(currentLatitude, currentLongitude);
MarkerOptions options = new MarkerOptions() // This adds in a marker
.position(latLng)
.title("Reverse Geo Toast here ???"); // when marker clicked, it will display you are here
mMap.addMarker(options);
// mMap.moveCamera(CameraUpdateFactory.newLatLng(latLng));
float zoomLevel = (float) 10; //This zooms into the marker
mMap.moveCamera(CameraUpdateFactory.newLatLngZoom(latLng, zoomLevel));
}
You can update the position of an existing marker using setPosition (Reference):
private Marker marker;
// ...
private void handleNewLocation(Location location) {
Log.d(TAG, location.toString());
double currentLatitude = location.getLatitude();
double currentLongitude = location.getLongitude();
LatLng latLng = new LatLng(currentLatitude, currentLongitude);
if (marker == null) {
MarkerOptions options = new MarkerOptions() // This adds in a marker
.position(latLng)
.title("Reverse Geo Toast here ???"); // when marker clicked, it will display you are here
marker = mMap.addMarker(options);
}
else {
marker.setPosition(latLng);
}
// mMap.moveCamera(CameraUpdateFactory.newLatLng(latLng));
float zoomLevel = (float) 10; //This zooms into the marker
mMap.moveCamera(CameraUpdateFactory.newLatLngZoom(latLng, zoomLevel));
}
#Override
public void onMapReady(GoogleMap googleMap) {
mMap = googleMap;
if (ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
return;
}
mMap.setMyLocationEnabled(true);
LatLng bangalore = new LatLng(12.9667, 77.5667);
mMap.addMarker(new MarkerOptions().position(bangalore).title("Bengaluru"));
float zoomLevel = 12;
mMap.moveCamera(CameraUpdateFactory.newLatLngZoom(bangalore, zoomLevel));
}
that code zooming to bangalore area but i need for my current location
Use this code location.getLatitude(), location.getLongitude() used to get current location
LocationManager locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
Criteria criteria = new Criteria();
Location location = locationManager.getLastKnownLocation(locationManager.getBestProvider(criteria, false));
if (location != null)
{
map.animateCamera(CameraUpdateFactory.newLatLngZoom(
new LatLng(location.getLatitude(), location.getLongitude()), 13));
CameraPosition cameraPosition = new CameraPosition.Builder()
.target(new LatLng(location.getLatitude(), location.getLongitude())) // Sets the center of the map to location user
.zoom(17) // Sets the zoom
.bearing(90) // Sets the orientation of the camera to east
.tilt(40) // Sets the tilt of the camera to 30 degrees
.build(); // Creates a CameraPosition from the builder
map.animateCamera(CameraUpdateFactory.newCameraPosition(cameraPosition));
}
pass your current location in this function where you have placed your marker.
private void moveToCurrentLocation(LatLng currentLocation)
{
mMap.moveCamera(CameraUpdateFactory.newLatLngZoom(currentLocation,15));
// Zoom in, animating the camera.
mMap.animateCamera(CameraUpdateFactory.zoomIn());
// animating with a duration of 2 seconds.
mMap.animateCamera(CameraUpdateFactory.zoomTo(15), 2000, null);
}
LatLngBounds.Builder builder = new LatLngBounds.Builder();
mMap.getMap().setOnMyLocationChangeListener(new GoogleMap.OnMyLocationChangeListener() {
#Override
public void onMyLocationChange(Location location) {
if (location != null) {
LatLng latlng = new LatLng(location.getLatitude(), location.getLatitude());
builder.include(latlng);
LatLngBounds bounds = builder.build();
int padding = getScreenWidth(activity) / 10;
CameraUpdate cu = CameraUpdateFactory.newLatLngBounds(bounds, padding);
mMap.getMap().animateCamera(cu);
}
}
});
public static int getScreenWidth(Activity activity) {
Display display = activity.getWindowManager().getDefaultDisplay();
Point size = new Point();
display.getSize(size);
return size.x;
}
I'm trying to mess around with the Maps API V2 to get more familiar with it, and I'm trying to start the map centered at the user's current location. Using the map.setMyLocationEnabled(true); statement, I am able to show my current location on the map. This also adds the button to the UI that centers the map on my current location.
I want to simulate that button press in my code. I am familiar with the LocationManager and LocationListener classes and realize that using those is a viable alternative, but the functionality to center and zoom in on the user's location seems to already be built in through the button.
If the API has a method to show the user's current location, there surely must be an easier way to center on the location than to use the LocationManager/LocationListener classes, right?
Try this coding:
LocationManager locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
Criteria criteria = new Criteria();
Location location = locationManager.getLastKnownLocation(locationManager.getBestProvider(criteria, false));
if (location != null)
{
map.animateCamera(CameraUpdateFactory.newLatLngZoom(new LatLng(location.getLatitude(), location.getLongitude()), 13));
CameraPosition cameraPosition = new CameraPosition.Builder()
.target(new LatLng(location.getLatitude(), location.getLongitude())) // Sets the center of the map to location user
.zoom(17) // Sets the zoom
.bearing(90) // Sets the orientation of the camera to east
.tilt(40) // Sets the tilt of the camera to 30 degrees
.build(); // Creates a CameraPosition from the builder
map.animateCamera(CameraUpdateFactory.newCameraPosition(cameraPosition));
}
After you instansiated the map object (from the fragment) add this -
private void centerMapOnMyLocation() {
map.setMyLocationEnabled(true);
location = map.getMyLocation();
if (location != null) {
myLocation = new LatLng(location.getLatitude(),
location.getLongitude());
}
map.animateCamera(CameraUpdateFactory.newLatLngZoom(myLocation,
Constants.MAP_ZOOM));
}
if you need any guidance just ask but it should be self explantory - just instansiate the myLocation object for a default one...
youmap.animateCamera(CameraUpdateFactory.newLatLngZoom(currentlocation, 16));
16 is the zoom level
mMap.setOnMyLocationChangeListener(new GoogleMap.OnMyLocationChangeListener() {
#Override
public void onMyLocationChange(Location location) {
CameraUpdate center=CameraUpdateFactory.newLatLng(new LatLng(location.getLatitude(), location.getLongitude()));
CameraUpdate zoom=CameraUpdateFactory.zoomTo(11);
mMap.moveCamera(center);
mMap.animateCamera(zoom);
}
});
try this code :
private GoogleMap mMap;
LocationManager locationManager;
private static final String TAG = "";
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_maps);
// Obtain the SupportMapFragment and get notified when the map is ready to be used.
SupportMapFragment mapFragment = (SupportMapFragment) getSupportFragmentManager()
.findFragmentById(map);
mapFragment.getMapAsync(this);
arrayPoints = new ArrayList<LatLng>();
}
#Override
public void onMapReady(GoogleMap googleMap) {
mMap = googleMap;
mMap.setMapType(GoogleMap.MAP_TYPE_HYBRID);
LatLng myPosition;
if (ActivityCompat.checkSelfPermission(this, android.Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, android.Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
// TODO: Consider calling
// ActivityCompat#requestPermissions
// here to request the missing permissions, and then overriding
// public void onRequestPermissionsResult(int requestCode, String[] permissions,
// int[] grantResults)
// to handle the case where the user grants the permission. See the documentation
// for ActivityCompat#requestPermissions for more details.
return;
}
googleMap.setMyLocationEnabled(true);
LocationManager locationManager = (LocationManager) getSystemService(LOCATION_SERVICE);
Criteria criteria = new Criteria();
String provider = locationManager.getBestProvider(criteria, true);
Location location = locationManager.getLastKnownLocation(provider);
if (location != null) {
double latitude = location.getLatitude();
double longitude = location.getLongitude();
LatLng latLng = new LatLng(latitude, longitude);
myPosition = new LatLng(latitude, longitude);
LatLng coordinate = new LatLng(latitude, longitude);
CameraUpdate yourLocation = CameraUpdateFactory.newLatLngZoom(coordinate, 19);
mMap.animateCamera(yourLocation);
}
}
}
Dont forget to add permissions on AndroidManifest.xml.
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>
<uses-permission android:name="android.permission.INTERNET"/>
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"/>
Here's how to do it inside ViewModel and FusedLocationProviderClient, code in Kotlin
locationClient.lastLocation.addOnSuccessListener { location: Location? ->
location?.let {
val position = CameraPosition.Builder()
.target(LatLng(it.latitude, it.longitude))
.zoom(15.0f)
.build()
map.animateCamera(CameraUpdateFactory.newCameraPosition(position))
}
}
private void setUpMapIfNeeded(){
if (mMap == null){
mMap = ((SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.map)).getMap();//invoke of map fragment by id from main xml file
if (mMap != null) {
mMap.setMyLocationEnabled(true);//Makes the users current location visible by displaying a blue dot.
LocationManager lm=(LocationManager)getSystemService(LOCATION_SERVICE);//use of location services by firstly defining location manager.
String provider=lm.getBestProvider(new Criteria(), true);
if(provider==null){
onProviderDisabled(provider);
}
Location loc=lm.getLastKnownLocation(provider);
if (loc!=null){
onLocationChanged(loc);
}
}
}
}
// Initialize map options. For example:
// mMap.setMapType(GoogleMap.MAP_TYPE_HYBRID);
#Override
public void onLocationChanged(Location location) {
LatLng latlng=new LatLng(location.getLatitude(),location.getLongitude());// This methods gets the users current longitude and latitude.
mMap.moveCamera(CameraUpdateFactory.newLatLng(latlng));//Moves the camera to users current longitude and latitude
mMap.animateCamera(CameraUpdateFactory.newLatLngZoom(latlng,(float) 14.6));//Animates camera and zooms to preferred state on the user's current location.
}
// TODO Auto-generated method stub
check this out:
fun requestMyGpsLocation(context: Context, callback: (location: Location) -> Unit) {
val request = LocationRequest()
// request.interval = 10000
// request.fastestInterval = 5000
request.numUpdates = 1
request.priority = LocationRequest.PRIORITY_HIGH_ACCURACY
val client = LocationServices.getFusedLocationProviderClient(context)
val permission = ContextCompat.checkSelfPermission(context,
Manifest.permission.ACCESS_FINE_LOCATION )
if (permission == PackageManager.PERMISSION_GRANTED) {
client.requestLocationUpdates(request, object : LocationCallback() {
override fun onLocationResult(locationResult: LocationResult?) {
val location = locationResult?.lastLocation
if (location != null)
callback.invoke(location)
}
}, null)
}
}
and
fun zoomOnMe() {
requestMyGpsLocation(this) { location ->
mMap?.animateCamera(CameraUpdateFactory.newLatLngZoom(
LatLng(location.latitude,location.longitude ), 13F ))
}
}
This is working Current Location with zoom for Google Map V2
double lat= location.getLatitude();
double lng = location.getLongitude();
LatLng ll = new LatLng(lat, lng);
googleMap.moveCamera(CameraUpdateFactory.newLatLngZoom(ll, 20));
In kotlin, you will get the current location then move the camera like this
map.isMyLocationEnabled = true
fusedLocationClient.lastLocation
.addOnSuccessListener { location: Location? ->
if (location != null) {
map.moveCamera(CameraUpdateFactory.newLatLngZoom(LatLng(location.latitude, location.longitude), 14f))
}
}
Also you can animate the move by using this function instead
map.animateCamera(CameraUpdateFactory.newLatLngZoom(new LatLng(location.latitude, location.longitude), 14f))