Filter Data using GeoFire

Question

I am working on an App which is showing drivers on map. I used GeoFire for that. In my app, I need to show only those drivers who are available. Please see the attached image for better info.

if "is_hired":"0" && "driver_available":"true", only then should drivers display on the map, else they are removed from the map.

Right now, its displaying all drivers because I don't know how to filter drivers using its data on Firebase.

With GeoFire, I need to create a different node for updating the driver location and it has its overridden methods:

@Override
    public void onKeyEntered(String key, GeoLocation location) {
        Log.e("KEY","KEY-->> " + key);
        Log.e("Location","Location-->> " + location.latitude+","+location.longitude);
        Toast.makeText(HomeActivity.this, "Marker Added", Toast.LENGTH_SHORT).show();
        // Add a new marker to the map
        Marker marker = this.googleMap.addMarker(new MarkerOptions().position(new LatLng(location.latitude, location.longitude)));
        this.driverMarkers.put(key, marker);
    }

    @Override
    public void onKeyExited(String key) {
        // Remove any old marker
        Toast.makeText(HomeActivity.this, "Marker removed", Toast.LENGTH_SHORT).show();
        Marker marker = this.driverMarkers.get(key);
        if (marker != null) {
            marker.remove();
            this.driverMarkers.remove(key);
        }
    }

    @Override
    public void onKeyMoved(String key, GeoLocation location) {
        // Move the marker
        Marker marker = this.driverMarkers.get(key);
        if (marker != null) {
            this.animateMarkerTo(marker, location.latitude, location.longitude);
        }
    }

How can I filter those markers who are not hired and available?

Before GeoFire, I was using Firebase database queries. Its drawback was it was fetching entire database drivers. I need to show only nearby drivers. Please help me in this.

Answer 1

The way to do this is to filter the drivers in the client inside onKeyEntered method.

@Override
public void onKeyEntered(String key, GeoLocation location) {
    ref.child("drivers").child(key).addListenerForSingleValueEvent(new ValueEventListener() {
        @Override
        public void onDataChange(DataSnapshot dataSnapshot) {
            Driver driver = dataSnapshot.getValue(Driver.class);
            if (driver.getIs_hired().equals("0") && driver.getDriver_available().equals("true")) {
                Marker marker = this.googleMap.addMarker(new MarkerOptions().position(new LatLng(location.latitude, location.longitude)));
                this.driverMarkers.put(key, marker);
            }
        }

        ...
    });
}

...

BTW, I use the equals method because the value for driver_available and is_hired in your database is in String, you might want to change them to Boolean and Integer