android.preference.PreferenceFragment#findPreference ( )源码实例Demo

@Override
public void preprocessPreferences(@NotNull PreferenceFragment preferenceFragment) {
    super.preprocessPreferences(preferenceFragment);

    if (Config.NSCLIENT) {
        PreferenceScreen scrnAdvancedSettings = (PreferenceScreen) preferenceFragment.findPreference(MainApp.gs(R.string.key_advancedsettings));
        if (scrnAdvancedSettings != null) {
            scrnAdvancedSettings.removePreference(preferenceFragment.findPreference(MainApp.gs(R.string.key_statuslights_res_warning)));
            scrnAdvancedSettings.removePreference(preferenceFragment.findPreference(MainApp.gs(R.string.key_statuslights_res_critical)));
            scrnAdvancedSettings.removePreference(preferenceFragment.findPreference(MainApp.gs(R.string.key_statuslights_bat_warning)));
            scrnAdvancedSettings.removePreference(preferenceFragment.findPreference(MainApp.gs(R.string.key_statuslights_bat_critical)));
            scrnAdvancedSettings.removePreference(preferenceFragment.findPreference(MainApp.gs(R.string.key_show_statuslights)));
            scrnAdvancedSettings.removePreference(preferenceFragment.findPreference(MainApp.gs(R.string.key_show_statuslights_extended)));
        }
    }
}
 

@TargetApi(Build.VERSION_CODES.HONEYCOMB)
private static void initPref_ui(final PreferenceFragment fragment)
{
    boolean[] showFields = AppSettings.loadShowFieldsPref(fragment.getActivity());
    for (int i = 0; i<AppSettings.NUM_FIELDS; i++)
    {
        CheckBoxPreference field = (CheckBoxPreference)fragment.findPreference(AppSettings.PREF_KEY_UI_SHOWFIELDS + "_" + i);
        if (field != null) {
            initPref_ui_field(field, fragment.getActivity(), i, showFields[i]);
        }
    }

    final ThemePreference overrideTheme_light = (ThemePreference)fragment.findPreference(PREF_KEY_APPEARANCE_THEME_LIGHT);
    initPref_ui_themeOverride(fragment.getActivity(), overrideTheme_light, fragment.getActivity(), PREF_KEY_APPEARANCE_THEME_LIGHT);
    loadPref_ui_themeOverride(fragment.getActivity(), overrideTheme_light, PREF_KEY_APPEARANCE_THEME_LIGHT, fragment.getActivity());

    final ThemePreference overrideTheme_dark = (ThemePreference)fragment.findPreference(AppSettings.PREF_KEY_APPEARANCE_THEME_DARK);
    initPref_ui_themeOverride(fragment.getActivity(), overrideTheme_dark, fragment.getActivity(), AppSettings.PREF_KEY_APPEARANCE_THEME_DARK);
    loadPref_ui_themeOverride(fragment.getActivity(), overrideTheme_dark, AppSettings.PREF_KEY_APPEARANCE_THEME_DARK, fragment.getActivity());

    updatePref_ui_themeOverride(AppSettings.loadThemePref(fragment.getActivity()), overrideTheme_dark, overrideTheme_light);
}
 

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    // Use Toolbar instead of ActionBar
    Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
    setSupportActionBar(toolbar);

    // Prepare ProgressBar
    progressBar = (ProgressBar) findViewById(R.id.progress_spinner);

    // Show app icon in Toolbar
    getSupportActionBar().setHomeButtonEnabled(true);
    getSupportActionBar().setDisplayShowHomeEnabled(true);
    getSupportActionBar().setDisplayUseLogoEnabled(true);
    getSupportActionBar().setLogo(R.mipmap.ic_logo);

    PreferenceFragment preferenceFragment = (PreferenceFragment) getFragmentManager().findFragmentById(R.id.frag_settings);
    switchAdmin = (SwitchPreference) preferenceFragment.findPreference("pref_key_device_admin_enabled");
    switchAdmin.setOnPreferenceChangeListener(switchAdminOnChangeListener);

    // Initialize Device Policy Manager service and our receiver class
    devicePolicyManager = (DevicePolicyManager) getSystemService(Context.DEVICE_POLICY_SERVICE);
    snooperStopperDeviceAdmin = new ComponentName(this, SnooperStopperDeviceAdminReceiver.class);
}
 

public static <T extends Preference> T $(PreferenceFragment preference, String key) {
	return (T) preference.findPreference(key);
}
 

@TargetApi(Build.VERSION_CODES.HONEYCOMB)
private static void initPref_general(PreferenceFragment fragment)
{
    Log.i(LOG_TAG, "initPref_general (fragment)");
    Context context = fragment.getActivity();

    String key_timeFormat = WidgetSettings.PREF_PREFIX_KEY + "0" + WidgetSettings.PREF_PREFIX_KEY_APPEARANCE + WidgetSettings.PREF_KEY_APPEARANCE_TIMEFORMATMODE;
    ListPreference timeformatPref = (ListPreference)fragment.findPreference(key_timeFormat);
    if (timeformatPref != null)
    {
        initPref_timeFormat(fragment.getActivity(), timeformatPref);
        loadPref_timeFormat(fragment.getActivity(), timeformatPref);
    }

    String key_altitudePref = WidgetSettings.PREF_PREFIX_KEY + "0" + WidgetSettings.PREF_PREFIX_KEY_LOCATION + WidgetSettings.PREF_KEY_LOCATION_ALTITUDE_ENABLED;
    CheckBoxPreference altitudePref = (CheckBoxPreference)fragment.findPreference(key_altitudePref);
    if (altitudePref != null)
    {
        initPref_altitude(fragment.getActivity(), altitudePref);
        loadPref_altitude(fragment.getActivity(), altitudePref);
    }

    String key_sunCalc = WidgetSettings.keyCalculatorModePref(0);
    SummaryListPreference calculatorPref = (SummaryListPreference) fragment.findPreference(key_sunCalc);
    if (calculatorPref != null)
    {
        initPref_calculator(context, calculatorPref, WidgetSettings.PREF_DEF_GENERAL_CALCULATOR);
        loadPref_calculator(context, calculatorPref);
    }

    String key_moonCalc = WidgetSettings.keyCalculatorModePref(0, "moon");
    SummaryListPreference moonCalculatorPref = (SummaryListPreference) fragment.findPreference(key_moonCalc);
    if (moonCalculatorPref != null)
    {
        initPref_calculator(context, moonCalculatorPref, new int[] {SuntimesCalculator.FEATURE_MOON}, WidgetSettings.PREF_DEF_GENERAL_CALCULATOR_MOON);
        loadPref_calculator(context, moonCalculatorPref, "moon");
    }

    String key_observerHeight = WidgetSettings.PREF_PREFIX_KEY + "0" + WidgetSettings.PREF_PREFIX_KEY_GENERAL + WidgetSettings.PREF_KEY_GENERAL_OBSERVERHEIGHT;
    LengthPreference observerHeightPref = (LengthPreference) fragment.findPreference(key_observerHeight);
    if (observerHeightPref != null)
    {
        initPref_observerHeight(fragment.getActivity(), observerHeightPref);
        loadPref_observerHeight(fragment.getActivity(), observerHeightPref);
    }
}
 

@TargetApi(Build.VERSION_CODES.HONEYCOMB)
private static void initPref_locale(PreferenceFragment fragment)
{
    ListPreference localePref = (ListPreference)fragment.findPreference(AppSettings.PREF_KEY_LOCALE);
    initPref_locale(fragment.getActivity(), localePref);
}
 

public static <T extends Preference> T $(PreferenceFragment pref, String key) {
	return (T) pref.findPreference(key);
}