如何检查 SwitchPreference 的当前状态？

Question

我有一个 SwitchPreferenceCompat 我想说如果启用了 Switch preference show Toast（启用了 switch preference）否则它再次禁用显示了 Toast（禁用了 switch preference）有一些这样的问题，但 none 对我有用。

这里是XML:

<PreferenceCategory app:title="عممومی">

    <Preference
        app:key="backUp"
        app:title="بشتیبان گیری آفلاین از اطلاعات" />
     

      <SwitchPreferenceCompat
        app:key="vibrate"
        app:defaultValue="true"
        app:summary="لرزش هنگام انتخاب یک آیتم"
        app:title="لرزش" />

</PreferenceCategory>

和设置片段：

class SettingsFragment : PreferenceFragmentCompat() {

    override fun onCreatePreferences(savedInstanceState: Bundle?, rootKey: String?) {
        setPreferencesFromResource(R.xml.root_preferences, rootKey)
    }
}

Answer 1

myPref!!.onPreferenceClickListener =
    Preference.OnPreferenceClickListener {
        Toast.makeText(activity, "WORK", Toast.LENGTH_SHORT).show()
        true
    }

您需要将 onPreferenceClickListener 替换为 onPreferenceChangeListener

override fun onCreatePreferences(savedInstanceState: Bundle?, rootKey: String?) {

    val myPref = findPreference<SwitchPreferenceCompat>("vibrate")

    myPref?.onPreferenceChangeListener =
       // The callback is triggered whenever the switch preference is changed
        Preference.OnPreferenceChangeListener { pref, newValue ->

            if (pref is SwitchPreferenceCompat) {
                val value = newValue as Boolean
                if (value) Toast.makeText(requireContext(), "WORK", Toast.LENGTH_SHORT)
                    .show()
                else Toast.makeText(requireContext(), "OFF", Toast.LENGTH_SHORT).show()
            }
            true
        }
}

如何检查 SwitchPreference 的当前状态？

How to check the current state of a SwitchPreference?

android

kotlin

switch-statement

fragment

switchpreference