/*
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* Copyright (C) 2017 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.android.settings.notification;
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import android.content.ContentResolver;
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import android.content.Context;
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import android.database.ContentObserver;
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import android.net.Uri;
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import android.os.Handler;
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import androidx.annotation.VisibleForTesting;
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import androidx.preference.Preference;
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import androidx.preference.PreferenceScreen;
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import com.android.settings.SettingsPreferenceFragment;
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import com.android.settings.core.PreferenceControllerMixin;
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import com.android.settingslib.core.AbstractPreferenceController;
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import com.android.settingslib.core.lifecycle.Lifecycle;
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import com.android.settingslib.core.lifecycle.LifecycleObserver;
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import com.android.settingslib.core.lifecycle.events.OnPause;
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import com.android.settingslib.core.lifecycle.events.OnResume;
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public abstract class SettingPrefController extends AbstractPreferenceController
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implements PreferenceControllerMixin, LifecycleObserver, OnResume, OnPause {
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protected static final int DEFAULT_ON = 1;
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private SettingsPreferenceFragment mParent;
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protected SettingsObserver mSettingsObserver;
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protected SettingPref mPreference;
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public SettingPrefController(Context context, SettingsPreferenceFragment parent,
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Lifecycle lifecycle) {
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super(context);
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mParent = parent;
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if (lifecycle != null) {
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lifecycle.addObserver(this);
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}
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}
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@Override
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public void displayPreference(PreferenceScreen screen) {
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mPreference.init(mParent);
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super.displayPreference(screen);
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if (isAvailable()) {
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mSettingsObserver = new SettingsObserver();
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}
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}
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@Override
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public String getPreferenceKey() {
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return mPreference.getKey();
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}
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@Override
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public boolean isAvailable() {
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return mPreference.isApplicable(mContext);
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}
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@Override
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public void updateState(Preference preference) {
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mPreference.update(mContext);
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}
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@Override
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public void onResume() {
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if (mSettingsObserver != null) {
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mSettingsObserver.register(true /* register */);
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}
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}
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@Override
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public void onPause() {
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if (mSettingsObserver != null) {
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mSettingsObserver.register(false /* register */);
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}
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}
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@VisibleForTesting
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final class SettingsObserver extends ContentObserver {
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public SettingsObserver() {
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super(new Handler());
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}
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public void register(boolean register) {
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final ContentResolver cr = mContext.getContentResolver();
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if (register) {
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cr.registerContentObserver(mPreference.getUri(), false, this);
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} else {
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cr.unregisterContentObserver(this);
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}
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}
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@Override
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public void onChange(boolean selfChange, Uri uri) {
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super.onChange(selfChange, uri);
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if (mPreference.getUri().equals(uri)) {
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mPreference.update(mContext);
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}
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}
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}
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}
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