I'm new to Android development and I wanted to ask how I would be able to add multiple markers to my application using the coordinates stored in Firebase. A screenshot of the Firebase is shown, but it helps me get only one marker for now. I want to get multiple markers by accessing the same document or suggestions that can help me manage places stored in firebase in a more organized way and display them on the map along with name and location. I've been able to retrieve on location, for now, screenshots of the app and firebase are attached.
public class MapsActivity extends FragmentActivity implements OnMapReadyCallback {
private static final int REQUEST_LOCATION_PERMISSION = 1009;
private GoogleMap mMap;
private ActivityMapsBinding binding;
private FusedLocationProviderClient mFusedLocationClient;
//These Clusters were used to manage the marker Clusters that had images on maps too
private ClusterManager mClusterManager;
//Same is the case with these clusters
private MyClusterManagerRenderer myClusterManagerRenderer;
//Instantiating the Firestore Database
FirebaseFirestore db;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// initializing our firebase firestore.
db = FirebaseFirestore.getInstance();
binding = ActivityMapsBinding.inflate(getLayoutInflater());
setContentView(binding.getRoot());
//Getting the device location over here
mFusedLocationClient = LocationServices.getFusedLocationProviderClient(this);
// 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);
}
private void addMapMarkers(){
}
private void getLastKnownLocation() {
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
// 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;
}
mFusedLocationClient.getLastLocation().addOnCompleteListener(new OnCompleteListener<Location>() {
@Override
public void onComplete(@NonNull Task<Location> task) {
if(task.isSuccessful()){
Location location = task.getResult();
}
}
});
}
/**
* Manipulates the map once available.
* This callback is triggered when the map is ready to be used.
* This is where we can add markers or lines, add listeners or move the camera. In this case,
* we just add a marker near Sydney, Australia.
* If Google Play services is not installed on the device, the user will be prompted to install
* it inside the SupportMapFragment. This method will only be triggered once the user has
* installed Google Play services and returned to the app.
*/
@Override
public void onMapReady(GoogleMap googleMap) {
mMap = googleMap;
// creating a variable for document reference.
DocumentReference documentReference = db.collection("MapsData").document("7QWDor9vozLaHdFYV9kh");
// calling document reference class with on snap shot listener.
documentReference.addSnapshotListener(new EventListener<DocumentSnapshot>() {
@Override
public void onEvent(@Nullable DocumentSnapshot value, @Nullable FirebaseFirestoreException error) {
if (value != null && value.exists()) {
// below line is to create a geo point and we are getting
// geo point from firebase and setting to it.
GeoPoint geoPoint = value.getGeoPoint("geoPoint");
// getting latitude and longitude from geo point
// and setting it to our location.
LatLng location = new LatLng(geoPoint.getLatitude(), geoPoint.getLongitude());
// adding marker to each location on google maps
mMap.addMarker(new MarkerOptions().position(location).title("Name"));
// below line is use to move camera.
mMap.moveCamera(CameraUpdateFactory.newLatLng(location));
} else {
Toast.makeText(MapsActivity.this, "Error found is " + error, Toast.LENGTH_SHORT).show();
}
}
});
//Adding custom maps style over here
//******** THIS PART OF CODE EXCLUSIVELY DESIGNED TO FETCH THE CUSTOM MAPS.JSON TEMPLATE**********
enableMyLocation();
try {
// Customise the styling of the base map using a JSON object defined
// in a raw resource file.
boolean success = googleMap.setMapStyle(
MapStyleOptions.loadRawResourceStyle(
this, R.raw.mapstyle));
if (!success) {
Log.e("MapsActivity", "Style parsing failed.");
}
} catch (Resources. NotFoundException e) {
Log.e("MapsActivity", "Can't find style. Error: ", e);
}
//******** MAP STYLING CODE ENDS OVER HERE **********
// Add a marker in Sydney and move the camera
LatLng sydney = new LatLng(-34, 151);
LatLng islamabad = new LatLng(33.68, 73.04);
mMap.addMarker(new MarkerOptions().position(sydney).title("Marker in Islamabad"));
//moving the camera position to Islamabad.
mMap.moveCamera(CameraUpdateFactory.newLatLng(islamabad));
}
//Getting the Users current Location
private void enableMyLocation() {
if (ContextCompat.checkSelfPermission(this,
Manifest.permission.ACCESS_FINE_LOCATION)
== PackageManager.PERMISSION_GRANTED) {
mMap.setMyLocationEnabled(true);
} else {
ActivityCompat.requestPermissions(this, new String[]
{Manifest.permission.ACCESS_FINE_LOCATION},
REQUEST_LOCATION_PERMISSION);
}
}
@Override
public void onRequestPermissionsResult(int requestCode,
@NonNull String[] permissions,
@NonNull int[] grantResults) {
// Check if location permissions are granted and if so enable the
// location data layer.
super.onRequestPermissionsResult(requestCode, permissions, grantResults);
switch (requestCode) {
case REQUEST_LOCATION_PERMISSION:
if (grantResults.length > 0
&& grantResults[0]
== PackageManager.PERMISSION_GRANTED) {
enableMyLocation();
break;
}
}
}
}