import android.os.Bundle;
import android.preference.ListPreference;
import android.preference.Preference;
import android.preference.PreferenceActivity;
import android.preference.PreferenceManager;
import android.view.Menu;
import android.view.MenuItem;


public class SettingsActivity extends PreferenceActivity implements Preference.OnPreferenceChangeListener {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        addPreferencesFromResource(R.xml.preferences);
        bindPreferenceSummaryToValue(findPreference("sortby"));
    }


    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.menu_settings, menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // Handle action bar item clicks here. The action bar will
        // automatically handle clicks on the Home/Up button, so long
        // as you specify a parent activity in AndroidManifest.xml.
        int id = item.getItemId();

        //noinspection SimplifiableIfStatement
        if (id == R.id.action_settings) {
            return true;
        }

        return super.onOptionsItemSelected(item);
    }

    @Override
    public boolean onPreferenceChange(Preference preference, Object newValue) {

        String stringValue = newValue.toString();
        if(preference instanceof ListPreference)
        {
            ListPreference listPreference = (ListPreference) preference;
            int prefIndex = listPreference.findIndexOfValue(stringValue);

            if(prefIndex >=0)
            {
                preference.setSummary(listPreference.getEntries()[prefIndex]);
            }
        }
        else
        {
            preference.setSummary(stringValue);
        }
        return true;
    }
    private void bindPreferenceSummaryToValue(Preference preference)
    {
        preference.setOnPreferenceChangeListener(this);

        //trigger listener with preferences current value
        onPreferenceChange(preference,
                PreferenceManager.getDefaultSharedPreferences
                        (preference.getContext()).getString(preference.getKey(),""));
    }
}