Settings.java

package com.notificationFramework.sedentary.frontEnd;


import android.content.Context;
import android.content.Intent;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.CheckBox;
import android.widget.EditText;
import android.widget.ImageButton;
import android.widget.SeekBar;
import android.widget.Spinner;
import android.widget.Switch;
import android.widget.TextView;
import android.widget.Toast;

/**
 * Created by Peter De Jonckheere on 21/11/2017.
 * <p>
 * Contains the buttons and menus which set a variety of user defined data which is used throughout
 * the application. Settings are saved either when the activity is stopped or when navigation is
 * made back to the main activity page.
 * </p>
 */

public class Settings extends AppCompatActivity {

    /**
     * Called when the Settings activity is navigated to from the main activity.Sets up the layout
     * using that which is defined in settings.xml and the delegates to further methods to set up
     * the buttons for the page.
     *
     * @param savedInstanceState contains information pertaining to previous states of the activity
     *                           if it has been used before
     * @see android.support.v7.app.AppCompatActivity
     */
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.settings);
        setUpButtons();
        retrieveSettings();
    }

    /**
     * Saves the settings of this page to the Shared Preferences if the activity is stopped.
     *
     * @see android.support.v7.app.AppCompatActivity
     */
    @Override
    protected void onStop() {
        super.onStop();
        saveSharedPreferenceData();
    }

    /**
     * Obtains settings which have been previously stored in Shared Preferences and initialise the
     * page with these values.
     */
    private void retrieveSettings() {
        SharedPreferences shared =
                this.getSharedPreferences(getString(R.string.preference_file_key), Context.MODE_PRIVATE);
        ((CheckBox) findViewById(R.id.Audio)).setChecked(shared.getBoolean(getString(R.string.audio), false));
        ((CheckBox) findViewById(R.id.Vibration)).
                setChecked(shared.getBoolean(getString(R.string.vibration), false));
        ((CheckBox) findViewById(R.id.LEDFlash)).
                setChecked(shared.getBoolean(getString(R.string.led), false));
        ((Spinner) findViewById(R.id.PeriodSpinner)).
                setSelection(shared.getInt(getString(R.string.notify_me), 0));
        ((EditText) findViewById(R.id.notificationMessage)).
                setText(shared.getString(getString(R.string.daily_goal_text),
                        getString(R.string.notf_text)));
        ((SeekBar) findViewById(R.id.seekBar2)).
                setProgress(shared.getInt(getString(R.string.daily_goal_set), getResources().getInteger(R.integer.daily_goal_minutes)));
        ((Switch) findViewById(R.id.NotSwitch)).
                setChecked(shared.getBoolean(getString(R.string.notf_switch), true));
    }

    /**
     * Sets up the buttons and spinners of the activity with the background code which makes them
     * operate as expected.
     */
    private void setUpButtons() {
        //Sets the onClickListener for the back button to navigate to the main activity
        ImageButton back = findViewById(R.id.back);
        back.bringToFront();
        back.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                saveSharedPreferenceData();
                Intent intent = new Intent(view.getContext(), MainActivity.class);
                displaySavedToast(view);
                startActivity(intent);
            }
        });
        //Sets the onClickListener for the button which navigates forwards to the advanced settings
        //activity
        Button adv = findViewById(R.id.button);
        adv.setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View view) {
                Intent intent = new Intent(view.getContext(), AdvancedSettings.class);
                startActivity(intent);
            }
        });
        setUpSeekBar();
        populateSpinner((Spinner) findViewById(R.id.PeriodSpinner), R.array.notification_periods);
    }

    /**
     * Sets the seek bar so that it can scrolled to set the daily goal in minutes. A text box is
     * also set to display above the bar to show the value which the seek bar is currently at.
     *
     * @see android.widget.SeekBar
     */
    private void setUpSeekBar() {
        SeekBar bar = findViewById(R.id.seekBar2);
        bar.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {
            private TextView progressText;

            {
                progressText = findViewById(R.id.seekBarValue);
            }

            @Override
            public void onProgressChanged(SeekBar bar, int progress, boolean fromUser) {
                int val = (progress * (bar.getWidth() - 2 * bar.getThumbOffset())) / bar.getMax();
                progressText.setText(String.valueOf(progress));
                progressText.setX(bar.getX() + val + bar.getThumbOffset() / 2);
            }

            @Override
            public void onStartTrackingTouch(SeekBar bar) {
                progressText.setVisibility(View.VISIBLE);
            }

            @Override
            public void onStopTrackingTouch(SeekBar bar) {
                progressText.setVisibility(View.INVISIBLE);
            }
        });
    }

    /**
     * Using the params provided fills the spinner with the desired data specififed by the arrayID.
     *
     * @param spinner the spinner which is to be populated with data
     * @param arrayID the resource ID of the array which contains the data to be added to the
     *                spinner
     */
    private void populateSpinner(Spinner spinner, int arrayID) {
        ArrayAdapter<CharSequence> adapter =
                ArrayAdapter.createFromResource(this, arrayID,
                        android.R.layout.simple_spinner_dropdown_item);
        adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
        spinner.setAdapter(adapter);
    }

    /**
     * Displays a Toast object which informs the user that the information entered on this page has
     * been stored.
     *
     * @param view the view object with which the Toast object is displayed within
     */
    private void displaySavedToast(View view) {
        Toast saved = Toast.makeText(view.getContext(), R.string.settings_saved, Toast.LENGTH_SHORT);
        saved.show();
    }

    /**
     * Stores the data of this page in the Shared Preferences which allows it to be used elsewhere
     * in the program and also allows this page to be reconstructed in the correct form when it is
     * returned to.
     */
    private void saveSharedPreferenceData() {
        boolean audio = ((CheckBox) findViewById(R.id.Audio)).isChecked();
        boolean vibration = ((CheckBox) findViewById(R.id.Vibration)).isChecked();
        boolean led = ((CheckBox) findViewById(R.id.LEDFlash)).isChecked();
        int spinnerPos = ((Spinner) findViewById(R.id.PeriodSpinner)).getSelectedItemPosition();
        int notifyGap = Integer.parseInt(
                ((Spinner) findViewById(R.id.PeriodSpinner)).getSelectedItem().toString());
        String message = ((EditText) findViewById(R.id.notificationMessage)).getText().toString();
        int progress = ((SeekBar) findViewById(R.id.seekBar2)).getProgress();
        boolean nswitch = ((Switch) findViewById(R.id.NotSwitch)).isChecked();
        SharedPreferences sharedPref =
                this.getSharedPreferences(getString(R.string.preference_file_key), Context.MODE_PRIVATE);
        SharedPreferences.Editor editor = sharedPref.edit();
        editor.putBoolean(getString(R.string.audio), audio);
        editor.putBoolean(getString(R.string.vibration), vibration);
        editor.putBoolean(getString(R.string.led), led);
        editor.putInt(getString(R.string.notify_me), spinnerPos);
        editor.putInt(getString(R.string.daily_goal), notifyGap);
        if (!message.matches(getString(R.string.notf_text))) {
            editor.putString(getString(R.string.daily_goal_text), message);
        }
        editor.putInt(getString(R.string.daily_goal_set), progress);
        editor.putBoolean(getString(R.string.notf_switch), nswitch);
        editor.commit();
    }
}