UpcomingEpisodeSettingsActivity.java

package com.battlelancer.seriesguide.dashclock;

import android.app.Fragment;
import android.app.FragmentTransaction;
import android.media.Ringtone;
import android.media.RingtoneManager;
import android.net.Uri;
import android.os.Bundle;
import android.preference.ListPreference;
import android.preference.Preference;
import android.preference.PreferenceFragment;
import android.preference.RingtonePreference;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.text.TextUtils;
import android.view.MenuItem;
import com.battlelancer.seriesguide.R;
import com.battlelancer.seriesguide.settings.DashClockSettings;
import com.battlelancer.seriesguide.ui.SeriesGuidePreferences;

/**
 * Allows setting the threshold for upcoming episodes to appear in DashClock.
 */
public class UpcomingEpisodeSettingsActivity extends AppCompatActivity {

    public void onCreate(Bundle savedInstanceState) {
        // set a theme based on user preference
        setTheme(SeriesGuidePreferences.THEME);

        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_singlepane);
        setupActionBar();

        if (savedInstanceState == null) {
            Fragment f = new SettingsFragment();
            FragmentTransaction ft = getFragmentManager().beginTransaction();
            ft.add(R.id.content_frame, f);
            ft.commit();
        }
    }

    private void setupActionBar() {
        Toolbar toolbar = (Toolbar) findViewById(R.id.sgToolbar);
        setSupportActionBar(toolbar);

        getSupportActionBar().setDisplayHomeAsUpEnabled(true);
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        if (item.getItemId() == android.R.id.home) {
            finish();
            return true;
        }

        return super.onOptionsItemSelected(item);
    }

    public static class SettingsFragment extends PreferenceFragment {
        @Override
        public void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);

            // Add 'general' preferences.
            getPreferenceManager().setSharedPreferencesName(DashClockSettings.SETTINGS_FILE);
            getPreferenceManager().setSharedPreferencesMode(0);
            addPreferencesFromResource(R.xml.settings_dashclock);

            // Bind the summaries of EditText/List/Dialog/Ringtone preferences to
            // their values. When their values change, their summaries are updated
            // to reflect the new value, per the Android Design guidelines.
            bindPreferenceSummaryToValue(findPreference(DashClockSettings.KEY_DASHCLOCK_THRESHOLD));
        }

        /**
         * Binds a preference's summary to its value. More specifically, when the preference's value
         * is changed, its summary (line of text below the preference title) is updated to reflect
         * the value. The summary is also immediately updated upon calling this method. The exact
         * display format is dependent on the type of preference.
         *
         * @see #sBindPreferenceSummaryToValueListener
         */
        private 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,
                    preference.getContext().getSharedPreferences(DashClockSettings.SETTINGS_FILE, 0)
                            .getString(preference.getKey(), ""));
        }

        /**
         * A preference value change listener that updates the preference's summary to reflect its
         * new value.
         */
        private static Preference.OnPreferenceChangeListener sBindPreferenceSummaryToValueListener
                = new Preference.OnPreferenceChangeListener() {
            @Override
            public boolean onPreferenceChange(Preference preference, Object 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;
            }
        };
    }
}