SettingsActivity.java

package com.njlabs.showjava.ui;

import android.app.FragmentManager;
import android.app.FragmentTransaction;
import android.os.Bundle;
import android.preference.ListPreference;
import android.preference.Preference;
import android.preference.PreferenceFragment;
import android.preference.PreferenceManager;
import android.view.Menu;

import com.njlabs.showjava.R;

public class SettingsActivity extends BaseActivity {

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

        setupLayout(R.layout.activity_settings);

        FragmentManager mFragmentManager = getFragmentManager();
        FragmentTransaction mFragmentTransaction = mFragmentManager.beginTransaction();
        PrefsFragment mPrefsFragment = new PrefsFragment();
        mFragmentTransaction.replace(R.id.container, mPrefsFragment);
        mFragmentTransaction.commit();

    }

    public static class PrefsFragment extends PreferenceFragment {

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


    private static final Preference.OnPreferenceChangeListener sBindPreferenceSummaryToValueListener = new Preference.OnPreferenceChangeListener() {
        @Override
        public boolean onPreferenceChange(Preference preference, Object value) {
            String stringValue = value.toString();
            if (preference instanceof ListPreference) {
                ListPreference listPreference = (ListPreference) preference;
                int index = listPreference.findIndexOfValue(stringValue);
                preference.setSummary(index >= 0 ? listPreference.getEntries()[index] : null);
            } else {
                preference.setSummary(stringValue);
            }
            return true;
        }
    };

    private static void bindPreferenceSummaryToValue(Preference preference) {
        preference.setOnPreferenceChangeListener(sBindPreferenceSummaryToValueListener);
        sBindPreferenceSummaryToValueListener.onPreferenceChange(preference,
                PreferenceManager
                        .getDefaultSharedPreferences(preference.getContext())
                        .getString(preference.getKey(), ""));
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        return true;
    }
}