SettingsActivity.java 文件源码

/**
 * 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 #listener
 */
private static void bind(@NonNull final Preference preference)
{
    // Set the listener to watch for value changes.
    preference.setOnPreferenceChangeListener(SettingsActivity.listener);

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