android.preference.Preference#setOnPreferenceChangeListener ( )源码实例Demo

/**
 * Binds a preference's summary to its value. More specifically, when the
 * preference's value is changed, its summary (line of text below the
 * preference title) is updated to reflect the value. The summary is also
 * immediately updated upon calling this method. The exact display format is
 * dependent on the type of preference.
 *
 * @see #sBindPreferenceSummaryToValueListener
 */
private static void bindPreferenceSummaryToValue(Preference preference) {
    // Set the listener to watch for value changes.
    preference.setOnPreferenceChangeListener(sBindPreferenceSummaryToValueListener);

    if (preference instanceof SwitchPreference) {
        sBindPreferenceSummaryToValueListener.onPreferenceChange(preference,
                PreferenceManager
                        .getDefaultSharedPreferences(preference.getContext())
                        .getBoolean(preference.getKey(), false));
    } else {
        sBindPreferenceSummaryToValueListener.onPreferenceChange(preference,
                PreferenceManager
                        .getDefaultSharedPreferences(preference.getContext())
                        .getString(preference.getKey(), ""));
    }

}
 

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    // Accountant.getInstance(getActivity());
    getActivity().setTitle(getString(R.string.labs_title));
    addPreferencesFromResource(R.xml.lab_preferences);

    // Set whether the preference should be checked or not.
    Preference pref = findPreference("MediaControllerService");

    // For builds other than KitKat, hide RemoteController API.
    if (null != pref) pref.setOnPreferenceChangeListener(this);

    // Add out listeners and state change stuff.
    if (pref instanceof TwoStatePreference) {
        notifPref = (TwoStatePreference) pref;
        updateNotifPref();
    }
}
 

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

private static void bindPreferenceSummaryToValue(Preference preference) {
    preference.setOnPreferenceChangeListener(sBindPreferenceSummaryToValueListener);

    sBindPreferenceSummaryToValueListener.onPreferenceChange(preference,
            PreferenceManager
                    .getDefaultSharedPreferences(preference.getContext())
                    .getString(preference.getKey(), ""));
}
 

/**
 * Binds a preference's summary to its value. More specifically, when the
 * preference's value is changed, its summary (line of text below the
 * preference title) is updated to reflect the value. The summary is also
 * immediately updated upon calling this method. The exact display format is
 * dependent on the type of preference.
 *
 * @see #sBindPreferenceSummaryToValueListener
 */
private static void bindPreferenceSummaryToValue(Preference preference) {
    // Set the listener to watch for value changes.
    preference.setOnPreferenceChangeListener(sBindPreferenceSummaryToValueListener);

    // Trigger the listener immediately with the preference's
    // current value.
    sBindPreferenceSummaryToValueListener.onPreferenceChange(preference,
            PreferenceManager
                    .getDefaultSharedPreferences(preference.getContext())
                    .getString(preference.getKey(), ""));
}
 

private static void bindPreferenceTitleAppendToIntegerValue(Preference preference) {
    try {
        preference.setOnPreferenceChangeListener(sBindPreferenceTitleAppendToIntegerValueListener);
        sBindPreferenceTitleAppendToIntegerValueListener.onPreferenceChange(preference,
                PreferenceManager
                        .getDefaultSharedPreferences(preference.getContext())
                        .getInt(preference.getKey(), 0));
    } catch (Exception e) {
        Log.e(TAG, "Got exception binding preference title: " + e.toString());
    }
}
 

private static void bindPreferenceTitleAppendToStringValue(Preference preference) {
    try {
        preference.setOnPreferenceChangeListener(sBindPreferenceTitleAppendToStringValueListener);
        sBindPreferenceTitleAppendToStringValueListener.onPreferenceChange(preference,
                PreferenceManager
                        .getDefaultSharedPreferences(preference.getContext())
                        .getString(preference.getKey(), ""));
    } catch (Exception e) {
        Log.e(TAG, "Got exception binding preference title: " + e.toString());
    }
}
 

/**
 * Binds a preference's summary to its value. More specifically, when the
 * preference's value is changed, its summary (line of text below the
 * preference title) is updated to reflect the value. The summary is also
 * immediately updated upon calling this method. The exact display format is
 * dependent on the type of preference.
 * 
 * @see #sBindPreferenceSummaryToValueListener
 */
private static void bindPreferenceSummaryToValue(Preference preference) {
	// Set the listener to watch for value changes.
	preference
			.setOnPreferenceChangeListener(sBindPreferenceSummaryToValueListener);

	// Trigger the listener immediately with the preference's
	// current value.
	sBindPreferenceSummaryToValueListener.onPreferenceChange(
			preference,
			PreferenceManager.getDefaultSharedPreferences(
					preference.getContext()).getString(preference.getKey(),
					""));
}
 

/**
 * Binds a preference's summary to its value. More specifically, when the
 * preference's value is changed, its summary (line of text below the
 * preference title) is updated to reflect the value. The summary is also
 * immediately updated upon calling this method. The exact display format is
 * dependent on the type of preference.
 *
 * @see #sBindPreferenceSummaryToValueListener
 */
public static void bindPreferenceSummaryToValue(Preference preference) {
    if (preference == null) return;
    // Set the listener to watch for value changes.
    preference.setOnPreferenceChangeListener(sBindPreferenceSummaryToValueListener);

    // Trigger the listener immediately with the preference's
    // current value.
    try {
        sBindPreferenceSummaryToValueListener.onPreferenceChange(preference,
                PreferenceManager.getDefaultSharedPreferences(preference.getContext())
                        .getString(preference.getKey(), ""));
    } catch (Exception e) {
    }
}
 

/**
 * Attaches a listener so the summary is always updated with the preference value.
 * Also fires the listener once, to initialize the summary (so it shows up before the value
 * is changed.)
 */
private void bindPreferenceSummaryToValue(Preference preference) {
    // Set the listener to watch for value changes
    preference.setOnPreferenceChangeListener(this);
    // Update and set summary of the preference
    updatePreference(preference, null);
}
 

private void preparePreferenceMaxImageSize(){
    Preference image_size = findPreference(Config.IMAGE_SIZE);
    image_size.setOnPreferenceChangeListener(new Preference.OnPreferenceChangeListener() {
        @Override
        public boolean onPreferenceChange(Preference preference, Object o) {
            Util.loadSelectedImageSize((String) o);
            return true;
        }
    });
}
 

/**
 * Binds a preference's summary to its value. More specifically, when the
 * preference's value is changed, its summary (line of text below the
 * preference title) is updated to reflect the value. The summary is also
 * immediately updated upon calling this method. The exact display format is
 * dependent on the type of preference.
 *
 * @see #sBindPreferenceSummaryToValueListener
 */
private static void bindPreferenceSummaryToValue(Preference preference) {
    // Set the listener to watch for value changes.
    preference.setOnPreferenceChangeListener(sBindPreferenceSummaryToValueListener);

    // Trigger the listener immediately with the preference's
    // current value.
    sBindPreferenceSummaryToValueListener.onPreferenceChange(preference,
            PreferenceManager
                    .getDefaultSharedPreferences(preference.getContext())
                    .getString(preference.getKey(), ""));
}
 

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

private void setPreferenceCategoryChangeListener(
        Preference category, Preference.OnPreferenceChangeListener listener) {
    PreferenceScreen ps = (PreferenceScreen) category;
    for (int i = 0; i < ps.getPreferenceCount(); i++) {
        Preference p = ps.getPreference(i);
        p.setOnPreferenceChangeListener(listener);
    }
}
 

/**
 * Binds a preference's summary to its value. More specifically, when the
 * preference's value is changed, its summary (line of text below the
 * preference title) is updated to reflect the value. The summary is also
 * immediately updated upon calling this method. The exact display format is
 * dependent on the type of preference.
 *
 * @see #sBindPreferenceSummaryToValueListener
 */
private static void bindPreferenceSummaryToValue(Preference preference)
{
    // Set the listener to watch for value changes.
    preference.setOnPreferenceChangeListener(sBindPreferenceSummaryToValueListener);

    // Trigger the listener immediately with the preference's
    // current value.
    sBindPreferenceSummaryToValueListener.onPreferenceChange(preference, PreferenceManager.getDefaultSharedPreferences(preference.getContext()).getString(preference.getKey(), ""));
}
 

/**
 * Binds a preference's summary to its value. More specifically, when the
 * preference's value is changed, its summary (line of text below the
 * preference title) is updated to reflect the value. The summary is also
 * immediately updated upon calling this method. The exact display format is
 * dependent on the type of preference.
 *
 * @see #sBindPreferenceSummaryToValueListener
 */
private static void bindPreferenceSummaryToValue(Preference preference) {
    // Set the listener to watch for value changes.
    preference.setOnPreferenceChangeListener(sBindPreferenceSummaryToValueListener);

    // Trigger the listener immediately with the preference's
    // current value.
    sBindPreferenceSummaryToValueListener.onPreferenceChange(preference,
            PreferenceManager
                    .getDefaultSharedPreferences(preference.getContext())
                    .getString(preference.getKey(), ""));
}
 

private static void initPref_timeFormat(final Activity context, final Preference timeformatPref)
{
    timeformatPref.setOnPreferenceChangeListener(new Preference.OnPreferenceChangeListener()
    {
        @Override
        public boolean onPreferenceChange(Preference preference, Object o)
        {
            timeformatPref.setSummary(timeFormatPrefSummary(WidgetSettings.TimeFormatMode.valueOf((String)o), context));
            return true;
        }
    });
}
 

private static void bindPreferenceSummaryToValue(Preference preference) {
    // Set the listener to watch for value changes.
    preference.setOnPreferenceChangeListener(sBindPreferenceSummaryToValueListener);
    sBindPreferenceSummaryToValueListener.onPreferenceChange(preference,
            preference.getContext().getSharedPreferences("CONFIG", Context.MODE_PRIVATE).getString(preference.getKey(), ""));
}
 

protected void register(Preference... preferences) {
	for (Preference p : preferences) {
		p.setOnPreferenceChangeListener(this);
		p.setOnPreferenceClickListener(this);
	}
}
 

private void setOnPreferenceChangeListener(String key) {
    Preference preference = DeprecatedUtils.findPreference(this, key);
    if (preference != null) {
        preference.setOnPreferenceChangeListener(this);
    }
}