MainActivity.java

package com.boba.runassistant;

import androidx.appcompat.app.AlertDialog;
import androidx.appcompat.app.AppCompatActivity;

import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.os.CountDownTimer;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;

import java.util.Calendar;
import java.util.Locale;

public class MainActivity extends AppCompatActivity {
	private TextView indoorTimeTextView;
	private Calendar startingTime;
	private SharedPreferences sharedPreferences;
	private TextView previousIndoorTimeTextView;
	private TextView previousIndoorDateTextView;
	private TextView previousDistTextView;
	private TextView previousTimeTextView;
	private TextView previousPaceTextView;
	private TextView previousDateTextView;


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

		indoorTimeTextView = findViewById(R.id.textViewIndoorTime);
		previousIndoorTimeTextView = findViewById(R.id.textViewPreviousIndoorTime);
		previousIndoorDateTextView = findViewById(R.id.textViewPreviousIndoorDate);
		previousDistTextView = findViewById(R.id.textViewPreviousDistance);
		previousTimeTextView = findViewById(R.id.textViewPreviousTime);
		previousPaceTextView = findViewById(R.id.textViewPreviousPace);
		previousDateTextView = findViewById(R.id.textViewPreviousDate);

		Button startIndoorRunningButton = findViewById(R.id.buttonStartIndoorRun);
		Button stopIndoorRunningButton = findViewById(R.id.buttonStopIndoorRun);
		Button startOutdoorRunningButton = findViewById(R.id.buttonStartOutdoorRun);
		startIndoorRunningButton.setOnClickListener(new View.OnClickListener() {
			@Override
			public void onClick(View v) {
				startIndoorRunning();
			}
		});
		stopIndoorRunningButton.setOnClickListener(new View.OnClickListener() {
			@Override
			public void onClick(View v) {
				stopIndoorRunning();
			}
		});
		startOutdoorRunningButton.setOnClickListener(new View.OnClickListener() {
			@Override
			public void onClick(View view) {
				launchMapActivity();
			}
		});

		sharedPreferences = getSharedPreferences("previousRun", Context.MODE_PRIVATE);

		// timer that keeps refreshing the gui elements every second
		CountDownTimer newTimer = new CountDownTimer(604800000, 1000) {

			public void onTick(long millisUntilFinished) {
				if (startingTime != null) {
					indoorTimeTextView.setText(getStringTimeFromSec((int) ((Calendar.getInstance().getTimeInMillis() - startingTime.getTimeInMillis()) / 1000)));
				}

				if (sharedPreferences.contains("IND_TIME_KEY")) {
					previousIndoorTimeTextView.setText(sharedPreferences.getString("IND_TIME_KEY", ""));
				}
				if (sharedPreferences.contains("IND_DATE_KEY")) {
					previousIndoorDateTextView.setText(sharedPreferences.getString("IND_DATE_KEY", ""));
				}
				if (sharedPreferences.contains("DIST_KEY")) {
					previousDistTextView.setText(sharedPreferences.getString("DIST_KEY", ""));
				}
				if (sharedPreferences.contains("TIME_KEY")) {
					previousTimeTextView.setText(sharedPreferences.getString("TIME_KEY", ""));
				}
				if (sharedPreferences.contains("PACE_KEY")) {
					previousPaceTextView.setText(sharedPreferences.getString("PACE_KEY", ""));
				}
				if (sharedPreferences.contains("DATE_KEY")) {
					previousDateTextView.setText(sharedPreferences.getString("DATE_KEY", ""));
				}
			}

			public void onFinish() {
			}
		};
		newTimer.start();
	}

	@Override
	public void onBackPressed() {
		new AlertDialog.Builder(this)
				.setTitle("Exit confirmation")
				.setMessage("Do you really want to close Run Assistant?")
				.setIcon(android.R.drawable.ic_dialog_alert)
				.setPositiveButton(android.R.string.yes, new DialogInterface.OnClickListener() {
					public void onClick(DialogInterface dialog, int whichButton) {
						MainActivity.super.onBackPressed();
					}
				})
				.setNegativeButton(android.R.string.no, null).show();
	}

	private void launchMapActivity() {
		Intent intent = new Intent(this, MapsActivity.class);
		startActivity(intent);
	}

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

	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 startIndoorRunning() {
		if (!indoorTimeTextView.getText().toString().equals("-")) {
			new AlertDialog.Builder(this)
					.setTitle("Confirmation")
					.setMessage("Do you really want to restart 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) {
							startingTime = Calendar.getInstance();
						}
					})
					.setNegativeButton(android.R.string.no, null).show();

		} else {
			startingTime = Calendar.getInstance();
		}
	}

	private void stopIndoorRunning() {
		if (!indoorTimeTextView.getText().toString().equals("-")) {
			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) {
							SharedPreferences sharedPreferences;
							sharedPreferences = getSharedPreferences("previousRun", Context.MODE_PRIVATE);
							SharedPreferences.Editor editor = sharedPreferences.edit();
							editor.putString("IND_TIME_KEY", indoorTimeTextView.getText().toString());
							editor.putString("IND_DATE_KEY", getStringDate());
							editor.apply();
							startingTime = null;
							indoorTimeTextView.setText("-");
						}
					})
					.setNegativeButton(android.R.string.no, null).show();

		}
	}
}