SettingsActivity.java

package net.bible.android.view.activity.settings;

import android.content.Context;
import android.os.Bundle;
import android.preference.ListPreference;
import android.preference.Preference;
import android.preference.Preference.OnPreferenceChangeListener;
import android.preference.PreferenceActivity;
import android.util.Log;

import net.bible.android.view.util.locale.LocaleHelper;
import net.bible.android.activity.R;
import net.bible.android.control.page.PageTiltScrollControl;
import net.bible.android.view.activity.base.CurrentActivityHolder;
import net.bible.android.view.activity.base.Dialogs;
import net.bible.android.view.util.UiUtils;
import net.bible.service.common.CommonUtils;
import net.bible.service.device.ScreenSettings;
import net.bible.service.device.ScreenTimeoutSettings;

import org.apache.commons.lang3.ArrayUtils;
import org.apache.commons.lang3.StringUtils;

/** show settings
 * 
 * @author Martin Denham [mjdenham at gmail dot com]
 * @see gnu.lgpl.License for license details.<br>
 *      The copyright to this program is held by it's author.
 */
public class SettingsActivity extends PreferenceActivity {

	private static final String LOCALE_PREF = "locale_pref";
	
	private static final String TAG = "SettingsActivity";
	
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		// change theme according to light sensor
		UiUtils.applyTheme(this);

		super.onCreate(savedInstanceState);

		// allow partial integration with And Bible framework - without this TTS stops
		// putting this before the below ensures any error dialog will be displayed in front of the settings screen and not the previous screen
		// see onStop for paired iAmNoLongerCurrent method call
		CurrentActivityHolder.getInstance().setCurrentActivity(this);
		
		try {
			addPreferencesFromResource(R.xml.settings);
			
		    //If no light sensor exists switch to old boolean check box
			// see here for method: http://stackoverflow.com/questions/4081533/how-to-remove-android-preferences-from-the-screen
			Preference unusedNightModePreference = getPreferenceScreen().findPreference(ScreenSettings.getUnusedNightModePreferenceKey());
			getPreferenceScreen().removePreference(unusedNightModePreference);
			
			// if no tilt sensor then remove tilt-to-scroll setting
			if (!PageTiltScrollControl.isTiltSensingPossible()) {
				Preference tiltToScrollPreference = getPreferenceScreen().findPreference(PageTiltScrollControl.TILT_TO_SCROLL_PREFERENCE_KEY);
				getPreferenceScreen().removePreference(tiltToScrollPreference);
			}
			
			// only JellyBean supports Malayalam so remove ml for older versions of Android
			if (!CommonUtils.isJellyBeanPlus()) {
		        ListPreference localePref = (ListPreference)getPreferenceScreen().findPreference(LOCALE_PREF);
		        CharSequence[] entries = localePref.getEntries();
		        CharSequence[] entryValues = localePref.getEntryValues();
		        int mlIndex = ArrayUtils.indexOf(entryValues, "ml");
		        if (mlIndex!=-1) {
		        	Log.d(TAG, "removing Malayalam from preference list");
		        	localePref.setEntries( ArrayUtils.remove(entries, mlIndex));
		        	localePref.setEntryValues( ArrayUtils.remove(entryValues, mlIndex));
		        }
		    }
			
			addScreenTimeoutSettings();

			// if locale is overridden then have to force title to be translated here
			LocaleHelper.translateTitle(this);

		} catch (Exception e) {
			Log.e(TAG, "Error preparing preference screen", e);
			Dialogs.getInstance().showErrorMsg(R.string.error_occurred, e);
		}
	}

	/**
	 * Override locale.  If user has selected a different ui language to the devices default language
	 */
	@Override
	protected void attachBaseContext(Context newBase) {
		super.attachBaseContext(LocaleHelper.onAttach(newBase));
	}

	private void addScreenTimeoutSettings() {
        ListPreference timeoutPref = (ListPreference)getPreferenceScreen().findPreference(ScreenTimeoutSettings.SCREEN_TIMEOUT_PREF);
        
        timeoutPref.setOnPreferenceChangeListener(new OnPreferenceChangeListener() {
			
			@Override
			public boolean onPreferenceChange(Preference preference, Object newValue) {
				// update screen timeout
				try {
					if (StringUtils.isNotEmpty((String)newValue)) {
						ScreenTimeoutSettings.setScreenTimeout(Integer.parseInt((String)newValue));
					}
				} catch (Exception e) {
					Log.e(TAG, "Error updating timeout set in preference screen", e);
				}
					
				return true;
			}
		});

        ScreenTimeoutSettings screenTimeoutSettings = new ScreenTimeoutSettings();
        timeoutPref.setEntries(screenTimeoutSettings.getPreferenceEntries());
        timeoutPref.setEntryValues(screenTimeoutSettings.getPreferenceEntryValues());
	}
	
	@Override
	protected void onStop() {
		super.onStop();
        Log.i(getLocalClassName(), "onStop");
        // call this onStop, although it is not guaranteed to be called, to ensure an overlap between dereg and reg of current activity, otherwise AppToBackground is fired mistakenly
        CurrentActivityHolder.getInstance().iAmNoLongerCurrent(this);
	}

}