How to save location object in firebase without Geofire?

Question

I have no idea how to save location in Firebase without using Geofire. One possible method may be to save only the co-ordinates to Firebase but looking at the location object (of Android), it has so many properties along with the coordinates. How to save complete object and retrieve it later?

Answer 1

You can achieve this, following these steps. First create a model class that looks like this:

public class LocationModel {
    private double lat, lng;

    LocationModel() {}

    public LocationModel(double lat, double lng) {
        this.lat = lat;
        this.lng = lng;
    }

    public double getLat() { return lat; }
    public double getLng() { return lng; }
}

Create an object of the class and add it to the database like this:

LocationModel locationModel = new LocationModel(48.858383, 2.294480);
DatabaseReference rootRef = FirebaseDatabase.getInstance().getReference();
DatabaseReference locationOneRef = rootRef.child("locations").child("locationOne");
locationOneRef.setValue(locationModel);

Your database should look like this:

Firebase-root
   |
   --- locations
          |
          --- locationOne
                  |
                  --- lat: 48.858383
                  |
                  --- lng: 2.294480

And to get the data back, please use the following code:

DatabaseReference rootRef = FirebaseDatabase.getInstance().getReference();
DatabaseReference locationOneRef = rootRef.child("locations").child("locationOne");
ValueEventListener valueEventListener = new ValueEventListener() {
    @Override
    public void onDataChange(DataSnapshot dataSnapshot) {
        double lat = dataSnapshot.child("lat").getValue(Double.class);
        double lng = dataSnapshot.child("lng").getValue(Double.class);
        Log.d("TAG", lat + / " + lng);
    }

    @Override
    public void onCancelled(DatabaseError databaseError) {}
};
locationOneRef.addListenerForSingleValueEvent(valueEventListener);

The output will be:

48.858383 / 2.294480