A snippet of one of the activities that I contributed to OnTime, the final project my group developed for CS65. OnTime is a location coordination and management app that helps you and all your friends arrive at a destination at the same time.

OnTime

/**
 * This is the eventDisplayActivity, it displays a specific event's information along with each
 * invitee's current status with regard to reaching the final location.
 */
public class EventDisplayActivity extends FragmentActivity implements OnMapReadyCallback, GoogleApiClient.ConnectionCallbacks,
        GoogleApiClient.OnConnectionFailedListener, com.google.android.gms.location.LocationListener {

    //for this code snippet, I removed all the variable declarations.

    @Override
    /**
     * When the location is changed, update the locations and distances on the cloud
     */
    public void onLocationChanged(Location location) {
        Log.d(TAG, "onLocationChanged");
        current_location = new ParseGeoPoint(location.getLatitude(), location.getLongitude());
        ParseQuery<Event> currentEventQuery = ParseQuery.getQuery("event");
        currentEventQuery.whereEqualTo("objectId", object_id);
        currentEventQuery.getFirstInBackground(new GetCallback<Event>() {
            @Override
            public void done(Event event, ParseException e) {
                if (event == null) {
                    Log.d("score", "The getFirst request failed.");
                } else {
                    displayedEvent = event;
                    init_distances = displayedEvent.getInitDistances();
                    userLocations = displayedEvent.getUserLocations();
                    userDistances = displayedEvent.getUserDistances();
                    Log.d(TAG, userDistances.toString());
                    if (userDistances.get(position) == -1.1) {
                        Log.d(TAG, "INIT LOCATIONS");
                        distance = current_location.distanceInMilesTo(finalGeoPoint);
                        init_distances.set(position, distance);
                        userLocations.set(position, current_location);
                        userDistances.set(position, distance);
                    }
                    else {
                        Log.d(TAG, "UPDATE LOCATIONS and POSITION: " + position);
                        distance = current_location.distanceInMilesTo(finalGeoPoint);
                        userLocations.set(position, current_location);
                        userDistances.set(position, distance);
                    }
                }
            }
        });

        // Save distances to cloud
        displayedEvent.setUserLocations(userLocations);
        displayedEvent.setUserDistances(userDistances);
        displayedEvent.saveInBackground();

        for (int i = 0; i < userDistances.size(); i++) {
            ProgressBar currentUserBar = progBarArrayList.get(i);

            double status = userDistances.get(i) / init_distances.get(i);
            if (status > 1){
                status = 1;
            }

            int intStatus = (int)((1-status) * 100);
            currentUserBar.setProgress(intStatus);
        }
    }

    /**
     * Gets the necessary information from the cloud including the corresponding position on the
     * array list and the userlocations. If userlocations don't exist, init a new one
     */
    private void getParseInformation() {
        currentUser = ParseUser.getCurrentUser();
        currentFbId = currentUser.getString("fbId");
        for (int i = 0; i < attendees.size(); i++) {
            if (attendees.get(i).equals(currentFbId)) {
                position = i;
                Log.d(TAG, "POSITION: " + Integer.toString(position));
            }
        }
        userLocations = displayedEvent.getUserLocations();
        userDistances = displayedEvent.getUserDistances();
        init_distances = displayedEvent.getInitDistances();
    }
    
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_event_display);

        final ActionBar actionBar = getActionBar();
        actionBar.setDisplayShowHomeEnabled(false);
        actionBar.setDisplayShowTitleEnabled(false);
        actionBar.setDisplayUseLogoEnabled(false);
        actionBar.hide();

        getWindow().setBackgroundDrawableResource(R.drawable.bokeh1copy3);

        initLocationTracking();

        //Gets event information from the MainActivity
        if (savedInstanceState == null) {
            object_id = getIntent().getStringExtra(OBJECT_ID);
            title = getIntent().getStringExtra(TITLE);

            finalLocation = getIntent().getParcelableExtra(LOCATION);
            finalGeoPoint = new ParseGeoPoint(finalLocation.getLatitude(),finalLocation.getLongitude());
            date = getIntent().getStringExtra(DATE);
            time = getIntent().getStringExtra(TIME);

            latitude = finalLocation.getLatitude();
            longitude = finalLocation.getLongitude();
            latLngLocation = new LatLng(latitude, longitude);

            Log.d(TAG, "ObjectID: " + object_id);

            ParseQuery<Event> currentEventQuery = ParseQuery.getQuery("event");
            currentEventQuery.whereEqualTo("objectId", object_id);
            try{
                displayedEvent = currentEventQuery.getFirst();
            }
            catch (ParseException e){
            }
            attendees = displayedEvent.getAcceptedList();
        }

        if (savedInstanceState != null) {
            attendees = savedInstanceState.getStringArrayList(ATTENDEES_INSTANCE_STATE_KEY);
            title = savedInstanceState.getString(EVENT_TITLE_INSTANCE_STATE_KEY);
            date = savedInstanceState.getString(DATE_INSTANCE_STATE_KEY);
            latLngLocation = savedInstanceState.getParcelable(LATLNG_INSTANCE_STATE_KEY);

        }

        getParseInformation();

        //get event title
        eventDisplayTextView = (TextView) findViewById(R.id.event_display_text_view);
        eventDisplayTextView.setTextColor(Color.WHITE);
        eventDisplayTextView.setText("    " + title.toUpperCase());

        //get event date and time
        eventDisplayDate = (TextView) findViewById(R.id.event_display_date);
        eventDisplayDate.setTextColor(Color.BLACK);
        eventDisplayDate.setText(date);

        //set event location
        android.support.v4.app.FragmentManager fragmentManager = getSupportFragmentManager();
        SupportMapFragment supportMapFragment = (SupportMapFragment) fragmentManager.findFragmentById(R.id.map);
        GoogleMap mmap = supportMapFragment.getMap();

        mmap.addMarker(new MarkerOptions()
                .position(latLngLocation)
                .title("Marker"));

        mmap.animateCamera(CameraUpdateFactory.newLatLngZoom(latLngLocation,
                17));

        progressBarLinearLayout = (LinearLayout) findViewById(R.id.progress_bar_linear_layout);

        // get events corresponding to attendees
        ParseQuery query_names = ParseUser.getQuery();
        query_names.whereContainedIn("fbId", attendees);
        parse_users = new ArrayList<ParseUser>();
        try {
            parse_users = (ArrayList<ParseUser>) query_names.find();
        } catch (ParseException e) {

        }

        //rearrange progress bar according to invite order
        for (int a = 0; a < parse_users.size(); a++) {
            String fbId = parse_users.get(a).getString("fbId");
            for (int b = 0; b < attendees.size(); b++) {
                if (attendees.get(b).equals(fbId)) {
                    ParseUser tmp = parse_users.get(b);
                    parse_users.set(b,parse_users.get(a));
                    parse_users.set(a,tmp);
                }
            }
        }

        progBarArrayList = new ArrayList<ProgressBar>();

        //dynamically add friends names and progress bars
        for (int i = 0; i < parse_users.size(); i++) {
            TextView newView = new TextView(this, null, R.style.CustomTextViewDani);
            //query parse for the user with the matching Fbook idea
            newView.setText(parse_users.get(i).getString("name"));
            newView.setTextSize(15);
            newView.setTextAppearance(this, R.style.boldText);
            progressBarLinearLayout.addView(newView);

            ProgressBar newBar = new ProgressBar(this, null, android.R.attr.progressBarStyleHorizontal);
            newBar.setMinimumWidth(40);
            newBar.setMinimumHeight(50);
            newBar.setId(i);
            newBar.setMax(100);

            newBar.setScrollBarSize(200);
            progressBarLinearLayout.addView(newBar);
            progBarArrayList.add(newBar);
        }
    }