FitoTrack/app/src/main/java/de/tadris/fitness/activity/FitoTrackSettingsActivity.java

/*
 * Copyright (c) 2020 Jannis Scheibe <jannis@tadris.de>
 *
 * This file is part of FitoTrack
 *
 * FitoTrack is free software: you can redistribute it and/or modify
 *     it under the terms of the GNU General Public License as published by
 *     the Free Software Foundation, either version 3 of the License, or
 *     (at your option) any later version.
 *
 *     FitoTrack is distributed in the hope that it will be useful,
 *     but WITHOUT ANY WARRANTY; without even the implied warranty of
 *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *     GNU General Public License for more details.
 *
 *     You should have received a copy of the GNU General Public License
 *     along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

package de.tadris.fitness.activity;

import android.app.AlertDialog;
import android.media.Ringtone;
import android.media.RingtoneManager;
import android.net.Uri;
import android.preference.ListPreference;
import android.preference.Preference;
import android.preference.PreferenceActivity;
import android.preference.PreferenceManager;
import android.preference.RingtonePreference;
import android.text.TextUtils;
import android.view.MenuItem;

import androidx.annotation.StringRes;

import de.tadris.fitness.R;
import de.tadris.fitness.util.unit.UnitUtils;

public abstract class FitoTrackSettingsActivity extends PreferenceActivity {

    protected void showErrorDialog(Exception e, @StringRes int title, @StringRes int message) {
        new AlertDialog.Builder(this)
                .setTitle(title)
                .setMessage(getString(message) + "\n\n" + e.getMessage())
                .setPositiveButton(R.string.okay, null)
                .create().show();
    }

    /**
     * A preference value change listener that updates the preference's summary
     * to reflect its new value.
     */
    protected static final Preference.OnPreferenceChangeListener sBindPreferenceSummaryToValueListener = (preference, value) -> {
        String stringValue = value.toString();

        if (preference instanceof ListPreference) {
            // For list preferences, look up the correct display value in
            // the preference's 'entries' list.
            ListPreference listPreference = (ListPreference) preference;
            int index = listPreference.findIndexOfValue(stringValue);

            // Set the summary to reflect the new value.
            preference.setSummary(
                    index >= 0
                            ? listPreference.getEntries()[index]
                            : null);

        } else if (preference instanceof RingtonePreference) {
            // For ringtone preferences, look up the correct display value
            // using RingtoneManager.
            if (TextUtils.isEmpty(stringValue)) {
                // Empty values correspond to 'silent' (no ringtone).
                preference.setSummary(R.string.pref_ringtone_silent);

            } else {
                Ringtone ringtone = RingtoneManager.getRingtone(
                        preference.getContext(), Uri.parse(stringValue));

                if (ringtone == null) {
                    // Clear the summary if there was a lookup error.
                    preference.setSummary(null);
                } else {
                    // Set the summary to reflect the new ringtone display
                    // name.
                    String name = ringtone.getTitle(preference.getContext());
                    preference.setSummary(name);
                }
            }

        } else {
            // For all other preferences, set the summary to the value's
            // simple string representation.
            preference.setSummary(stringValue);
        }
        return true;
    };

    protected static void bindPreferenceSummaryToValue(Preference preference) {
        // Set the listener to watch for value changes.
        preference.setOnPreferenceChangeListener(sBindPreferenceSummaryToValueListener);

        // Trigger the listener immediately with the preference's
        // current value.
        sBindPreferenceSummaryToValueListener.onPreferenceChange(preference,
                PreferenceManager
                        .getDefaultSharedPreferences(preference.getContext())
                        .getString(preference.getKey(), ""));
    }

    @Override
    protected void onDestroy() {
        super.onDestroy();
        UnitUtils.setUnit(this);
    }

    @Override
    public boolean onMenuItemSelected(int featureId, MenuItem item) {
        int id = item.getItemId();
        if (id == android.R.id.home) {
            finish();
            return true;
        }
        return super.onMenuItemSelected(featureId, item);
    }

}