SettingsActivity.java

package at.tugraz.examreminder.ui;

import android.content.Intent;
import android.os.Build;
import android.preference.CheckBoxPreference;
import android.widget.Toast;
import at.tugraz.examreminder.service.CalendarHelper;
import at.tugraz.examreminder.service.DailyListener;
import at.tugraz.examreminder.service.UpdateService;
import at.tugraz.examreminder.ui.custompreferences.TimePreference;
import com.actionbarsherlock.app.SherlockPreferenceActivity;

import android.content.Context;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.preference.ListPreference;
import android.preference.Preference;
import android.preference.PreferenceManager;
import at.tugraz.examreminder.R;
import com.actionbarsherlock.view.MenuItem;
import com.commonsware.cwac.wakeful.WakefulIntentService;

import java.util.Date;
import java.util.List;

public class SettingsActivity extends SherlockPreferenceActivity implements SharedPreferences.OnSharedPreferenceChangeListener{
	
	private Context context;

    private CheckBoxPreference pref_use_android_calendar;
    private ListPreference pref_android_calendar_to_use;
	private ListPreference pref_updateFrequency;
    private ListPreference pref_useTabletLayout;
    private TimePreference pref_updateTime;
	private Preference pref_updateNow;	


	
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		context = getApplicationContext();
		PreferenceManager.setDefaultValues(this, R.xml.preferences, false);
		addPreferencesFromResource(R.xml.preferences);
        pref_use_android_calendar = (CheckBoxPreference) findPreference("pref_use_android_calendar");
        pref_android_calendar_to_use = (ListPreference) findPreference("pref_android_calendar_to_use");
		pref_updateFrequency = (ListPreference) findPreference("pref_update_frequency");
        pref_useTabletLayout = (ListPreference) findPreference("pref_use_tablet_layout");
        pref_updateTime = (TimePreference) findPreference("pref_update_time");
		pref_updateNow = findPreference("pref_update_now");

        if (android.os.Build.VERSION.SDK_INT < Build.VERSION_CODES.ICE_CREAM_SANDWICH) {
            PreferenceManager.getDefaultSharedPreferences(context).edit().putBoolean("pref_use_android_calendar", false).commit();
            pref_use_android_calendar.setEnabled(false);
            pref_android_calendar_to_use.setEnabled(false);

        } else {
            boolean use_calendar = PreferenceManager.getDefaultSharedPreferences(context).getBoolean("pref_use_android_calendar", false);
            pref_android_calendar_to_use.setEnabled(use_calendar);
            updateCalendarList();
        }

		updateSummaries();

		getSupportActionBar().setDisplayHomeAsUpEnabled(true);
		
		pref_updateNow.setOnPreferenceClickListener(new Preference.OnPreferenceClickListener() {
			
			@Override
			public boolean onPreferenceClick(Preference preference) {
				handleUpdateNow();
				return false;
			}
			});
	}

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        switch (item.getItemId()) {
            case android.R.id.home:
                onBackPressed();
                return true;
        }
        return super.onOptionsItemSelected(item);
    }

    @Override
	public void onResume() {
		super.onResume();
		PreferenceManager.getDefaultSharedPreferences(context).registerOnSharedPreferenceChangeListener(this);
        updateSummaries();
	}

	@Override
	public void onPause() {
		super.onPause();
		PreferenceManager.getDefaultSharedPreferences(context).unregisterOnSharedPreferenceChangeListener(this);
	}

	public void onSharedPreferenceChanged(SharedPreferences sharedPreferences, String key) {
        boolean use_calendar = PreferenceManager.getDefaultSharedPreferences(context).getBoolean("pref_use_android_calendar", false);
        pref_android_calendar_to_use.setEnabled(use_calendar);
		updateSummaries();
        DailyListener.scheduleMe(context); //Always reschedule since most preferences affect this
	}

	private void updateSummaries() {
        pref_android_calendar_to_use.setSummary(pref_android_calendar_to_use.getEntry());
		pref_updateFrequency.setSummary(pref_updateFrequency.getEntry());
        pref_useTabletLayout.setSummary(pref_useTabletLayout.getEntry());
        pref_updateTime.setSummary(pref_updateTime.toString());
        Date time = new Date(PreferenceManager.getDefaultSharedPreferences(context).getLong("pref_last_update",0));
        pref_updateNow.setSummary(getString(R.string.pref_update_now_summery) + time.toString());
	}

	private void handleUpdateNow() {
		//SimpleDateFormat format = new SimpleDateFormat("dd.MM.yyyy hh:mm:ss");
		//String datetime = format.format(new Date());
		//String prefix = getString(R.string.pref_update_now_summery);
		//pref_updateNow.setSummary(prefix + datetime + " (didn't actually do anything)");
        Intent intent = new Intent(getApplicationContext(), UpdateService.class);
        intent.setAction("Blub");
        Toast.makeText(this, R.string.update_started, Toast.LENGTH_SHORT).show();
        WakefulIntentService.sendWakefulWork(getApplicationContext(), UpdateService.class);
	}

    private void updateCalendarList() {
        CalendarHelper calendarHelper = new CalendarHelper(this);
        List<CalendarHelper.Calendar> calendars = calendarHelper.getLocalCalendars();
        CharSequence keys[] = new CharSequence[calendars.size()];
        CharSequence values[] = new CharSequence[calendars.size()];
        for(int i = 0; i < calendars.size(); i++) {
            keys[i] = String.valueOf(calendars.get(i).ID);
            values[i] = String.valueOf(calendars.get(i).displayName);
        }
        pref_android_calendar_to_use.setEntries(values);
        pref_android_calendar_to_use.setEntryValues(keys);
    }
}