如何使用Kotlin在OnPreferenceChangeListener上保存newValue？

Question

我知道在OnPreferenceChangeListener上，newValue尚未保存为true。

我希望手动保存，我该怎么办？谢谢！

 fun setPreference(){
        val chAutoRestore = preferenceManager.findPreference(getString(R.string.IsAutoRestore)) as CheckBoxPreference

        chAutoRestore.onPreferenceChangeListener = Preference.OnPreferenceChangeListener { preference, newValue ->
            logError( "Pref " + preference.key + " changed to " + newValue.toString())

            //Save newValue
            startOrStopScheduleRestore(mContext)
            true

        }
    }

Answer 1

它将自动存储在xml中的“共享首选项”中：

<EditTextPreference
        android:defaultValue="@string/default_value"
        android:key="YOUR_KEY"
        android:title="@string/title"/>

要获取值，请使用：

getSharedPreferences(this).getBoolean("YOUR_KEY", false)

Answer 2

此代码对我有用

val notificationPreference: SwitchPreferenceCompat? = findPreference("notifications")
notificationPreference!!.onPreferenceChangeListener =
    Preference.OnPreferenceChangeListener { preference, newValue ->

        // Manually save to Prefs
        Utilities().putPrefBoolean(preference.key, newValue as Boolean)

        // Reflect the newValue to Preference?
        true
    }