SettingsActivity.java

/*
 * Copyright (C) 2013 Moritz Heindl <lenidh[at]gmail[dot]com>
 *
 * This program 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.
 *
 * This program 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 lenidh.android.holochron.ui;

import android.app.AlertDialog;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.SharedPreferences;
import android.content.pm.PackageManager;
import android.os.Bundle;
import android.preference.ListPreference;
import android.preference.PreferenceScreen;
import android.util.Log;
import com.actionbarsherlock.app.SherlockPreferenceActivity;
import com.actionbarsherlock.view.MenuItem;
import lenidh.android.holochron.App;
import lenidh.android.holochron.R;

@SuppressWarnings("deprecation")
public class SettingsActivity extends SherlockPreferenceActivity
		implements SharedPreferences.OnSharedPreferenceChangeListener {

	private static final String TAG = "SettingsActivity";
	private ListPreference theme;
	private ListPreference volumeButtons;

	public void onCreate(Bundle savedInstanceState) {
		// Theme needs to be selected before super.onCreate.
		if (App.getThemePreference().equals(getString(R.string.pref_value_theme_dark))) {
			setTheme(R.style.AppTheme_Dark);
		}

		super.onCreate(savedInstanceState);

		addPreferencesFromResource(R.xml.settings);
		getSupportActionBar().setDisplayHomeAsUpEnabled(true);

		PreferenceScreen preferenceScreen = getPreferenceScreen();
		assert preferenceScreen != null;
		this.theme = (ListPreference) preferenceScreen.findPreference(getString(R.string.pref_key_theme));
		this.volumeButtons = (ListPreference) preferenceScreen.findPreference(getString(R.string.pref_key_volume_buttons));
	}

	@Override
	protected void onResume() {
		super.onResume();

		this.theme.setSummary(this.theme.getEntry());
		this.volumeButtons.setSummary(this.volumeButtons.getEntry());

		PreferenceScreen preferenceScreen = getPreferenceScreen();
		assert preferenceScreen != null;
		SharedPreferences sharedPreferences = preferenceScreen.getSharedPreferences();
		assert sharedPreferences != null;
		sharedPreferences.registerOnSharedPreferenceChangeListener(this);
	}

	@Override
	protected void onPause() {
		super.onPause();

		PreferenceScreen preferenceScreen = getPreferenceScreen();
		assert preferenceScreen != null;
		SharedPreferences sharedPreferences = preferenceScreen.getSharedPreferences();
		assert sharedPreferences != null;
		sharedPreferences.unregisterOnSharedPreferenceChangeListener(this);
	}

	@Override
	public boolean onOptionsItemSelected(MenuItem item) {
		switch (item.getItemId()) {
			case android.R.id.home:
				Intent home = new Intent(this, MainActivity.class);
				home.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
				this.startActivity(home);
				return true;
		}

		return super.onOptionsItemSelected(item);
	}

	@Override
	public void onSharedPreferenceChanged(SharedPreferences sharedPreferences, String key) {
		if (key.equals(getString(R.string.pref_key_theme))) {
			this.theme.setSummary(this.theme.getEntry());
			AlertDialog.Builder builder = new AlertDialog.Builder(this);
			builder.setMessage(R.string.restart_message);
			builder.setTitle(R.string.restart);
			builder.setPositiveButton(R.string.restart, new DialogInterface.OnClickListener() {
				public void onClick(DialogInterface dialog, int id) {
					PackageManager pm = getPackageManager();
					assert pm != null;
					Intent i = pm.getLaunchIntentForPackage(getPackageName());
					assert i != null;
					i.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
					App.updateThemePreference();
					startActivity(i);
				}
			});
			builder.setNegativeButton(R.string.restart_later, null);
			AlertDialog dialog = builder.create();
			dialog.show();
		} else if (key.equals(getString(R.string.pref_key_volume_buttons))) {
			this.volumeButtons.setSummary(this.volumeButtons.getEntry());
		} else {
			Log.w(TAG, "Unhandled preference change.");
		}
	}
}