PreferencesActivity.java 文件源码

public void showFragment(@XmlRes int preferenceId, @StringRes int title) {

        //TODO: cache the Fragments so they can be reused
        getFragmentManager().beginTransaction()
                .replace(R.id.fragment_container, PreferencesFragment.newInstance(preferenceId))
                .commit();

        ActionBar actionBar = getSupportActionBar();
        if (actionBar != null) {
            actionBar.setTitle(title);
        }

        currentPreferences = preferenceId;
        currentTitle = title;
    }