SettingsActivity.java 文件源码

/**
 * Update a preference
 * @param key - which preference
 */
private void updatePref(String key){
    ListPreference preference = (ListPreference) findPreference(key);
    CharSequence entry = preference.getEntry();
    String value = preference.getValue();
    preference.setSummary(entry);
    SharedPreferences.Editor editor = mPreferences.edit();
    // Fucking strangely, a string cannot be parsed to an integer
    editor.putString(key, value);
    editor.apply();
}