Single page PreferenceActivity w/no headers/fragments?

New preferred way is to show a single PreferenceFragment as the main content of any activity. It doesn't need to be PreferenceActivity. See the APIs demo sample

public class FragmentPreferences extends Activity {

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

        // Display the fragment as the main content.
        getFragmentManager().beginTransaction().replace(android.R.id.content,
                new PrefsFragment()).commit();
    }


    public static class PrefsFragment extends PreferenceFragment {

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

            // Load the preferences from an XML resource
            addPreferencesFromResource(R.xml.preferences);
        }
    }

}  

I was looking for an answer that matched this question. Eventually, I worked it out from several other sources. For those that may still want it answered, here's what worked for me. (Note - both min and target SDKs are set to 15 in this project.)

1. Dump the PreferenceHeaders, you won't need them.
2. Create a preference screen with the single page settings.
3. Create a preference activity class (SettingsActivity below).
4. Create an inline class extending PreferenceFragment (LocationFragment below).
5. Define the class in the Manifest.
6. Start the task - see the menu code below.

The preference class that displays the single settings screen.

public class SettingsActivity extends PreferenceActivity {

    private final static String TAG = "SettingsAcitivity";

    public SettingsActivity() {}

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        MyLog.d(TAG, "onCreate");
        getFragmentManager().beginTransaction()
                .replace(android.R.id.content, new LocationFragment()).commit();
    }

    public class LocationFragment extends PreferenceFragment {

        private final static String TAG = "LocationFragment";

        @Override
        public void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            MyLog.d(TAG, "onCreate");
            addPreferencesFromResource(R.xml.locationsettings);
        }
    }
}

The code to display the Settings:

@Override
public boolean onOptionsItemSelected(MenuItem item) {
    MyLog.d(TAG, "onOptionsItemSelected");
    switch (item.getItemId()) {
    case R.id.menu_main_help:
        break;
    case R.id.menu_main_about:
        break;
    case R.id.menu_main_settings:
        MyLog.d(TAG, "Settings");
        Intent settingsIntent = new Intent(this, SettingsActivity.class);
        startActivity(settingsIntent);
        break;
    }
    return true;
}

The Back key terminates the SettingsActivity. The built in preference routines save any changes. The onResume function I have does a getSettings() that updates any changed settings used by the calling activity (MainActivity in this case).

That's it.