MapsNearbyActivity.java

public class MapsNearbyActivity extends AppCompatActivity implements OnMapReadyCallback {

    private GoogleMap mMap;
    private Member mMember;

    private GPSTracker gps;

    private double mLong, mLat;

    @BindView(R.id.toolbar)
    Toolbar toolbar;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_maps_nearby);
        ButterKnife.bind(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);


        setSupportActionBar(toolbar);
        getSupportActionBar().setDisplayShowTitleEnabled(true);
        getSupportActionBar().setDisplayHomeAsUpEnabled(true);        

        gps = new GPSTracker(this);
    }


    /**
     * 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;
        if(gps.canGetLocation()){

            mLat = gps.getLatitude();
            mLong = gps.getLongitude();

            if(mLat != 0 && mLong != 0) {
                LatLng latLng = new LatLng(mLat, mLong);
                mMap.addMarker(new MarkerOptions()
                        .position(latLng)
                        .title("My Location"));
                mMap.moveCamera(CameraUpdateFactory.newLatLng(latLng));
                mMap.animateCamera(CameraUpdateFactory.zoomIn());
                mMap.animateCamera(CameraUpdateFactory.zoomTo(10), 2000, null);                
            }

            // \n is for new line
        }else{
            // can't get location
            // GPS or Network is not enabled
            // Ask user to enable GPS/network in settings
            gps.showSettingsAlert();
        }
        // Add a marker in Sydney and move the camera

    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        int id = item.getItemId();

        if (id == android.R.id.home) {
            onBackPressed();
            return true;
        }
        return super.onOptionsItemSelected(item);
    }    

}