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39 lines
1.4 KiB
Kotlin
39 lines
1.4 KiB
Kotlin
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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package org.mozilla.fenix.settings
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import android.content.SharedPreferences
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import androidx.lifecycle.DefaultLifecycleObserver
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import androidx.lifecycle.LifecycleObserver
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import androidx.lifecycle.LifecycleOwner
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class OnSharedPreferenceChangeListener(
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private val sharedPreferences: SharedPreferences,
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private val listener: (SharedPreferences, String?) -> Unit,
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) : SharedPreferences.OnSharedPreferenceChangeListener, DefaultLifecycleObserver {
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override fun onCreate(owner: LifecycleOwner) {
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sharedPreferences.registerOnSharedPreferenceChangeListener(this)
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}
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override fun onDestroy(owner: LifecycleOwner) {
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sharedPreferences.unregisterOnSharedPreferenceChangeListener(this)
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}
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override fun onSharedPreferenceChanged(sharedPreferences: SharedPreferences, key: String?) {
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listener(sharedPreferences, key)
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}
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}
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/**
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* Registers a [OnSharedPreferenceChangeListener] as a [LifecycleObserver] for a preference.
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*/
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fun SharedPreferences.registerOnSharedPreferenceChangeListener(
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owner: LifecycleOwner,
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listener: (SharedPreferences, String?) -> Unit,
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) {
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owner.lifecycle.addObserver(OnSharedPreferenceChangeListener(this, listener))
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}
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