Preferences.java

package com.tuit.ar.activities;

import android.content.SharedPreferences;
import android.content.SharedPreferences.Editor;
import android.os.Bundle;
import android.preference.CheckBoxPreference;
import android.preference.ListPreference;
import android.preference.Preference;
import android.preference.PreferenceActivity;
import android.preference.Preference.OnPreferenceClickListener;

import com.tuit.ar.R;
import com.tuit.ar.models.Settings;
import com.tuit.ar.models.SettingsObserver;
import com.tuit.ar.preferences.DialogPreference;
import com.tuit.ar.preferences.DialogPreferenceListener;
import com.tuit.ar.preferences.EditTextPreference;

public class Preferences extends PreferenceActivity implements SettingsObserver {
	private ListPreference updateInterval;
	private CheckBoxPreference lazyMode;
	private CheckBoxPreference automaticUpdate;
	private EditTextPreference filter;
	private DialogPreference filterDelete;
	private CheckBoxPreference showAvatar;

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);

		Settings.getInstance().addObserver(this);

		addPreferencesFromResource(R.layout.preferences);

		automaticUpdate = (CheckBoxPreference) findPreference(Settings.AUTOMATIC_UPDATE);
		automaticUpdate.setOnPreferenceClickListener(new OnPreferenceClickListener() {
			public boolean onPreferenceClick(Preference preference) {
				updateInterval.setEnabled(automaticUpdate.isChecked());
				updateSettings();
				return false;
			}
		});

		updateInterval = (ListPreference) findPreference(Settings.UPDATE_INTERVAL);
		updateInterval.setOnPreferenceClickListener(new OnPreferenceClickListener() {
			public boolean onPreferenceClick(Preference preference) {
				updateSettings();
				return false;
			}
		});

		filter = (EditTextPreference)getPreferenceScreen().findPreference(Settings.FILTER);
		filter.setDialogPreferenceListener(new DialogPreferenceListener() {
			public void onDialogClosed(boolean positiveValue) {
				if (positiveValue) {
					filter.setText(filter.getEditText().getText().toString());
				}
				updateSettings();
			}
		});

		filterDelete = (com.tuit.ar.preferences.DialogPreference)findPreference(Settings.FILTER_DELETE);
		filterDelete.setDialogPreferenceListener(new DialogPreferenceListener() {
			public void onDialogClosed(boolean positiveValue) {
				if (positiveValue) {
					filter.setText("");
					updateSettings();
				}
			}
		});

		showAvatar = (CheckBoxPreference) findPreference(Settings.SHOW_AVATAR);
		showAvatar.setOnPreferenceClickListener(new OnPreferenceClickListener() {
			public boolean onPreferenceClick(Preference preference) {
				updateSettings();
				return false;
			}
		});

		lazyMode = (CheckBoxPreference) findPreference(Settings.LAZY_MODE);
		lazyMode.setOnPreferenceClickListener(new OnPreferenceClickListener() {
			public boolean onPreferenceClick(Preference preference) {
				updateSettings();
				return false;
			}
		});
		setValues();
	}

	protected void updateSettings() {
		Settings settings = Settings.getInstance();
		Editor editor = settings.getSharedPreferences(this).edit();
		editor.putBoolean(Settings.LAZY_MODE, lazyMode.isChecked());
		editor.putBoolean(Settings.AUTOMATIC_UPDATE, automaticUpdate.isChecked());
		editor.putString(Settings.UPDATE_INTERVAL, updateInterval.getValue());
		editor.putString(Settings.FILTER, filter.getText());
		editor.putBoolean(Settings.SHOW_AVATAR, showAvatar.isChecked());
		if (editor.commit()) {
			settings.callObservers();
		}
	}

	public void settingsHasChanged(Settings settings) {
		setValues();
	}

	public void setValues() {
		Settings settings = Settings.getInstance();
		setTitle(getString(R.string.preferencesType).replaceAll("%s", settings.getSettingsName(this)));
		SharedPreferences preferences = settings.getSharedPreferences(this);
		lazyMode.setChecked(preferences.getBoolean(Settings.LAZY_MODE, Settings.LAZY_MODE_DEFAULT));
		automaticUpdate.setChecked(preferences.getBoolean(Settings.AUTOMATIC_UPDATE, Settings.AUTOMATIC_UPDATE_DEFAULT));
		updateInterval.setEnabled(automaticUpdate.isChecked());
		updateInterval.setValue(preferences.getString(Settings.UPDATE_INTERVAL, Settings.UPDATE_INTERVAL_DEFAULT));
		filter.setText(preferences.getString(Settings.FILTER, ""));
		showAvatar.setChecked(preferences.getBoolean(Settings.SHOW_AVATAR, Settings.SHOW_AVATAR_DEFAULT));
	}

	public void onDestroy() {
		super.onDestroy();
		Settings.getInstance().removeObserver(this);
		lazyMode.setOnPreferenceClickListener(null);
		automaticUpdate.setOnPreferenceClickListener(null);
		updateInterval.setOnPreferenceClickListener(null);
		filter.setDialogPreferenceListener(null);
		filterDelete.setDialogPreferenceListener(null);
		showAvatar.setOnPreferenceClickListener(null);
	}
}