MapsActivity.java

package com.boba.runassistant;

import androidx.appcompat.app.AlertDialog;
import androidx.core.app.ActivityCompat;
import androidx.fragment.app.FragmentActivity;

import android.Manifest;
import android.content.Context;
import android.content.DialogInterface;
import android.content.SharedPreferences;
import android.content.pm.PackageManager;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;

import com.google.android.gms.maps.CameraUpdateFactory;
import com.google.android.gms.maps.GoogleMap;
import com.google.android.gms.maps.OnMapReadyCallback;
import com.google.android.gms.maps.SupportMapFragment;
import com.google.android.gms.maps.model.LatLng;
import com.google.android.gms.maps.model.MarkerOptions;
import com.google.android.gms.maps.model.Polyline;
import com.google.android.gms.maps.model.PolylineOptions;

import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Calendar;
import java.util.Locale;


public class MapsActivity extends FragmentActivity implements OnMapReadyCallback {
	PolylineOptions options;
	Polyline line;
	private TextView distanceTextView;
	private TextView timeTextView;
	private TextView paceTextView;
	private GoogleMap mMap;
	private LatLng ownLocation = new LatLng(52.405336, -1.499966);
	private ArrayList<Location> route = new ArrayList<>();
	private Location previousLocation;
	private Float distanceTraveled = (float) 0;
	private Integer timeElapsed = 0;

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

		distanceTextView = findViewById(R.id.textViewDistance);
		timeTextView = findViewById(R.id.textViewTime);
		paceTextView = findViewById(R.id.textViewPace);
		options = new PolylineOptions().width(16).color(0xFFFF0000).geodesic(true);

		// 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);
		ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.ACCESS_FINE_LOCATION}, PackageManager.PERMISSION_GRANTED);

		Button stopRunningButton;
		Button centerMapButton;
		stopRunningButton = findViewById(R.id.buttonFinishRunning);
		stopRunningButton.setOnClickListener(new View.OnClickListener() {
			@Override
			public void onClick(View view) {
				finishRunningActivityButton();
			}
		});

		centerMapButton = findViewById(R.id.buttonCenterMap);
		centerMapButton.setOnClickListener(new View.OnClickListener() {
			@Override
			public void onClick(View view) {
				centerMap();
			}
		});

	}

	@Override
	public void onMapReady(GoogleMap googleMap) {
		mMap = googleMap;
		mMap.setMinZoomPreference(14);
		mMap.setMaxZoomPreference(18);
		centerMap();

		LocationListener locationListener = new LocationListener() {
			@Override
			public void onLocationChanged(Location location) {
				if (previousLocation != null) {

					route.add(previousLocation);
					options.add(new LatLng(previousLocation.getLatitude(), previousLocation.getLongitude()));
					distanceTraveled += location.distanceTo(previousLocation);
					timeElapsed = (int) (location.getTime() - route.get(0).getTime()) / 1000;
				}

				try {
					mMap.clear();
					ownLocation = new LatLng(location.getLatitude(), location.getLongitude());
					mMap.addMarker(new MarkerOptions().position(ownLocation).title("Current location"));
					line = mMap.addPolyline(options);


				} catch (SecurityException e) {
					e.printStackTrace();
				}

				timeTextView.setText(getStringTimeFromSec(timeElapsed));
				distanceTextView.setText(String.format(Locale.ENGLISH, "%.3f", distanceTraveled / 1000.0));

				if (distanceTraveled > 0 && timeElapsed > 0) {
					paceTextView.setText(String.format(Locale.ENGLISH, "%.2f", (double) timeElapsed / (0.06 * (double) distanceTraveled)));
				}

				previousLocation = location;
			}

			@Override
			public void onStatusChanged(String provider, int status, Bundle extras) {
			}

			@Override
			public void onProviderEnabled(String provider) {
			}

			@Override
			public void onProviderDisabled(String provider) {
			}
		};
		LocationManager locationManager = (LocationManager) getSystemService(LOCATION_SERVICE);
		try {
			locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 1000, 10, locationListener);
		} catch (SecurityException e) {
			e.printStackTrace();
		}
	}

	@Override
	public void onBackPressed() {
		finishRunningActivityButton();
	}

	private String getStringTimeFromSec(Integer timeElapsed) {
		Integer secondsElapsed = timeElapsed % 60;
		Integer minutesElapsed = (timeElapsed / 60) % 60;
		Integer hoursElapsed = timeElapsed / 3600;

		if (hoursElapsed > 0) {
			return String.format(Locale.ENGLISH, "%dh %dm %d", hoursElapsed, minutesElapsed, secondsElapsed);
		} else if (minutesElapsed > 0) {
			return String.format(Locale.ENGLISH, "%dm %d", minutesElapsed, secondsElapsed);
		} else {
			return String.format(Locale.ENGLISH, "%d", secondsElapsed);
		}
	}

	private void writeDataToSharedPref() {
		SharedPreferences sharedPreferences;
		sharedPreferences = getSharedPreferences("previousRun", Context.MODE_PRIVATE);
		SharedPreferences.Editor editor = sharedPreferences.edit();
		editor.putString("DIST_KEY", distanceTextView.getText().toString());
		editor.putString("TIME_KEY", String.format(Locale.ENGLISH, "%s", timeTextView.getText().toString()));
		editor.putString("PACE_KEY", paceTextView.getText().toString());
		editor.putString("DATE_KEY", getStringDate());
		editor.apply();
	}

	private String getStringDate() {
		Calendar calendar = Calendar.getInstance();
		return String.format(Locale.ENGLISH, "%d-%d-%d %dh %dm %ds",
				calendar.get(Calendar.YEAR),
				calendar.get(Calendar.MONTH) + 1,
				calendar.get(Calendar.DAY_OF_MONTH),
				calendar.get(Calendar.HOUR_OF_DAY),
				calendar.get(Calendar.MINUTE),
				calendar.get(Calendar.SECOND));
	}

	private void finishRunningActivityButton() {
		new AlertDialog.Builder(this)
				.setTitle("Confirmation")
				.setMessage("Do you really want to stop and save the running exercise?")
				.setIcon(android.R.drawable.ic_dialog_alert)
				.setPositiveButton(android.R.string.yes, new DialogInterface.OnClickListener() {
					public void onClick(DialogInterface dialog, int whichButton) {
						writeDataToSharedPref();
						finish(); // finish this activity
					}
				})
				.setNegativeButton(android.R.string.no, null).show();
	}

	private void centerMap() {
		mMap.moveCamera(CameraUpdateFactory.newLatLng(ownLocation));
	}
}