src/com/android/settings/notification/LockScreenNotificationPreferenceController.java - LeafOS-Project/android_packages_apps_Settings - Gitiles

 /*
  * Copyright (C) 2016 The Android Open Source Project
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
  *
  *      http://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */

 package com.android.settings.notification;

 import static android.app.admin.DevicePolicyManager.KEYGUARD_DISABLE_SECURE_NOTIFICATIONS;
 import static android.app.admin.DevicePolicyManager.KEYGUARD_DISABLE_UNREDACTED_NOTIFICATIONS;
 import static android.app.admin.DevicePolicyResources.Strings.Settings.LOCK_SCREEN_HIDE_WORK_NOTIFICATION_CONTENT;
 import static android.app.admin.DevicePolicyResources.Strings.Settings.LOCK_SCREEN_SHOW_WORK_NOTIFICATION_CONTENT;

 import android.app.admin.DevicePolicyManager;
 import android.content.ContentResolver;
 import android.content.Context;
 import android.database.ContentObserver;
 import android.net.Uri;
 import android.os.Handler;
 import android.os.UserHandle;
 import android.os.UserManager;
 import android.provider.Settings;
 import android.text.TextUtils;
 import android.util.Log;

 import androidx.preference.Preference;
 import androidx.preference.PreferenceScreen;

 import com.android.internal.widget.LockPatternUtils;
 import com.android.settings.R;
 import com.android.settings.RestrictedListPreference;
 import com.android.settings.Utils;
 import com.android.settings.core.PreferenceControllerMixin;
 import com.android.settings.overlay.FeatureFactory;
 import com.android.settingslib.RestrictedLockUtils;
 import com.android.settingslib.RestrictedLockUtilsInternal;
 import com.android.settingslib.core.AbstractPreferenceController;
 import com.android.settingslib.core.lifecycle.LifecycleObserver;
 import com.android.settingslib.core.lifecycle.events.OnPause;
 import com.android.settingslib.core.lifecycle.events.OnResume;

 import java.util.ArrayList;

 public class LockScreenNotificationPreferenceController extends AbstractPreferenceController
         implements PreferenceControllerMixin, Preference.OnPreferenceChangeListener,
         LifecycleObserver, OnResume, OnPause {

     private static final String TAG = "LockScreenNotifPref";

     private final String mSettingKey;
     private final String mWorkSettingCategoryKey;
     private final String mWorkSettingKey;

     private RestrictedListPreference mLockscreen;
     private RestrictedListPreference mLockscreenProfile;

     private final int mProfileUserId;
     private final boolean mSecure;
     private final boolean mSecureProfile;

     private SettingObserver mSettingObserver;
     private int mLockscreenSelectedValue;
     private int mLockscreenSelectedValueProfile;

     public LockScreenNotificationPreferenceController(Context context) {
         this(context, null, null, null);
     }

     public LockScreenNotificationPreferenceController(Context context,
             String settingKey, String workSettingCategoryKey, String workSettingKey) {
         super(context);
         mSettingKey = settingKey;
         mWorkSettingCategoryKey = workSettingCategoryKey;
         mWorkSettingKey = workSettingKey;

         mProfileUserId = Utils.getManagedProfileId(UserManager.get(context), UserHandle.myUserId());
         final LockPatternUtils utils = FeatureFactory.getFeatureFactory()
                 .getSecurityFeatureProvider()
                 .getLockPatternUtils(context);
         mSecure = utils.isSecure(UserHandle.myUserId());
         mSecureProfile = (mProfileUserId != UserHandle.USER_NULL) && utils.isSecure(mProfileUserId);
     }

     @Override
     public void displayPreference(PreferenceScreen screen) {
         super.displayPreference(screen);
         mLockscreen = screen.findPreference(mSettingKey);
         if (mLockscreen == null) {
             Log.i(TAG, "Preference not found: " + mSettingKey);
             return;
         }
         if (mProfileUserId != UserHandle.USER_NULL) {
             mLockscreenProfile = screen.findPreference(mWorkSettingKey);
             mLockscreenProfile.setRequiresActiveUnlockedProfile(true);
             mLockscreenProfile.setProfileUserId(mProfileUserId);
         } else {
             setVisible(screen, mWorkSettingKey, false /* visible */);
             setVisible(screen, mWorkSettingCategoryKey, false /* visible */);
         }
         mSettingObserver = new SettingObserver();
         initLockScreenNotificationPrefDisplay();
         initLockscreenNotificationPrefForProfile();
     }

     private void initLockScreenNotificationPrefDisplay() {
         ArrayList<CharSequence> entries = new ArrayList<>();
         ArrayList<CharSequence> values = new ArrayList<>();

         String summaryShowEntry =
                 mContext.getString(R.string.lock_screen_notifications_summary_show);
         String summaryShowEntryValue =
                 Integer.toString(R.string.lock_screen_notifications_summary_show);
         entries.add(summaryShowEntry);
         values.add(summaryShowEntryValue);
         setRestrictedIfNotificationFeaturesDisabled(summaryShowEntry, summaryShowEntryValue,
                 KEYGUARD_DISABLE_SECURE_NOTIFICATIONS | KEYGUARD_DISABLE_UNREDACTED_NOTIFICATIONS);

         if (mSecure) {
             String summaryHideEntry =
                     mContext.getString(R.string.lock_screen_notifications_summary_hide);
             String summaryHideEntryValue =
                     Integer.toString(R.string.lock_screen_notifications_summary_hide);
             entries.add(summaryHideEntry);
             values.add(summaryHideEntryValue);
             setRestrictedIfNotificationFeaturesDisabled(summaryHideEntry, summaryHideEntryValue,
                     KEYGUARD_DISABLE_SECURE_NOTIFICATIONS);
         }

         entries.add(mContext.getString(R.string.lock_screen_notifications_summary_disable));
         values.add(Integer.toString(R.string.lock_screen_notifications_summary_disable));


         mLockscreen.setEntries(entries.toArray(new CharSequence[entries.size()]));
         mLockscreen.setEntryValues(values.toArray(new CharSequence[values.size()]));
         updateLockscreenNotifications();

         if (mLockscreen.getEntries().length > 1) {
             mLockscreen.setOnPreferenceChangeListener(this);
         } else {
             // There is one or less option for the user, disable the drop down.
             mLockscreen.setEnabled(false);
         }
     }

     private void initLockscreenNotificationPrefForProfile() {
         if (mLockscreenProfile == null) {
             Log.i(TAG, "Preference not found: " + mWorkSettingKey);
             return;
         }
         ArrayList<CharSequence> entries = new ArrayList<>();
         ArrayList<CharSequence> values = new ArrayList<>();

         DevicePolicyManager devicePolicyManager =
                 mContext.getSystemService(DevicePolicyManager.class);

         String summaryShowEntry = devicePolicyManager
                 .getResources().getString(LOCK_SCREEN_SHOW_WORK_NOTIFICATION_CONTENT,
                         () -> mContext.getString(
                                 R.string.lock_screen_notifications_summary_show_profile));
         String summaryShowEntryValue = Integer.toString(
                 R.string.lock_screen_notifications_summary_show_profile);
         entries.add(summaryShowEntry);
         values.add(summaryShowEntryValue);
         setRestrictedIfNotificationFeaturesDisabled(summaryShowEntry, summaryShowEntryValue,
                 KEYGUARD_DISABLE_SECURE_NOTIFICATIONS | KEYGUARD_DISABLE_UNREDACTED_NOTIFICATIONS);

         if (mSecureProfile) {
             String summaryHideEntry = devicePolicyManager
                     .getResources().getString(LOCK_SCREEN_HIDE_WORK_NOTIFICATION_CONTENT,
                             () -> mContext.getString(
                                     R.string.lock_screen_notifications_summary_hide_profile));
             String summaryHideEntryValue = Integer.toString(
                     R.string.lock_screen_notifications_summary_hide_profile);
             entries.add(summaryHideEntry);
             values.add(summaryHideEntryValue);
             setRestrictedIfNotificationFeaturesDisabled(summaryHideEntry, summaryHideEntryValue,
                     KEYGUARD_DISABLE_SECURE_NOTIFICATIONS);
         }

         mLockscreenProfile.setEntries(entries.toArray(new CharSequence[entries.size()]));
         mLockscreenProfile.setEntryValues(values.toArray(new CharSequence[values.size()]));
         updateLockscreenNotificationsForProfile();
         if (mLockscreenProfile.getEntries().length > 1) {
             mLockscreenProfile.setOnPreferenceChangeListener(this);
         } else {
             // There is one or less option for the user, disable the drop down.
             mLockscreenProfile.setEnabled(false);
         }
     }

     @Override
     public String getPreferenceKey() {
         return null;
     }

     @Override
     public boolean isAvailable() {
         return false;
     }

     @Override
     public void onResume() {
         if (mSettingObserver != null) {
             mSettingObserver.register(mContext.getContentResolver(), true /* register */);
         }
     }

     @Override
     public void onPause() {
         if (mSettingObserver != null) {
             mSettingObserver.register(mContext.getContentResolver(), false /* register */);
         }
     }

     @Override
     public boolean onPreferenceChange(Preference preference, Object newValue) {
         final String key = preference.getKey();
         if (TextUtils.equals(mWorkSettingKey, key)) {
             final int val = Integer.parseInt((String) newValue);
             if (val == mLockscreenSelectedValueProfile) {
                 return false;
             }
             final boolean show = val == R.string.lock_screen_notifications_summary_show_profile;
             Settings.Secure.putIntForUser(mContext.getContentResolver(),
                     Settings.Secure.LOCK_SCREEN_ALLOW_PRIVATE_NOTIFICATIONS,
                     show ? 1 : 0, mProfileUserId);
             mLockscreenSelectedValueProfile = val;
             return true;
         } else if (TextUtils.equals(mSettingKey, key)) {
             final int val = Integer.parseInt((String) newValue);
             if (val == mLockscreenSelectedValue) {
                 return false;
             }
             final boolean enabled = val != R.string.lock_screen_notifications_summary_disable;
             final boolean show = val == R.string.lock_screen_notifications_summary_show;
             Settings.Secure.putInt(mContext.getContentResolver(),
                     Settings.Secure.LOCK_SCREEN_ALLOW_PRIVATE_NOTIFICATIONS, show ? 1 : 0);
             Settings.Secure.putInt(mContext.getContentResolver(),
                     Settings.Secure.LOCK_SCREEN_SHOW_NOTIFICATIONS, enabled ? 1 : 0);
             mLockscreenSelectedValue = val;
             return true;
         }
         return false;
     }

     private void setRestrictedIfNotificationFeaturesDisabled(CharSequence entry,
             CharSequence entryValue, int keyguardNotificationFeatures) {
         RestrictedLockUtils.EnforcedAdmin admin =
                 RestrictedLockUtilsInternal.checkIfKeyguardFeaturesDisabled(
                         mContext, keyguardNotificationFeatures, UserHandle.myUserId());
         if (admin != null && mLockscreen != null) {
             RestrictedListPreference.RestrictedItem item =
                     new RestrictedListPreference.RestrictedItem(entry, entryValue, admin);
             mLockscreen.addRestrictedItem(item);
         }
         if (mProfileUserId != UserHandle.USER_NULL) {
             RestrictedLockUtils.EnforcedAdmin profileAdmin =
                     RestrictedLockUtilsInternal.checkIfKeyguardFeaturesDisabled(
                             mContext, keyguardNotificationFeatures, mProfileUserId);
             if (profileAdmin != null && mLockscreenProfile != null) {
                 RestrictedListPreference.RestrictedItem item =
                         new RestrictedListPreference.RestrictedItem(
                                 entry, entryValue, profileAdmin);
                 mLockscreenProfile.addRestrictedItem(item);
             }
         }
     }

     public static int getSummaryResource(Context context) {
         final boolean enabled = getLockscreenNotificationsEnabled(context);
         final boolean secure = FeatureFactory.getFeatureFactory()
                 .getSecurityFeatureProvider()
                 .getLockPatternUtils(context)
                 .isSecure(UserHandle.myUserId());
         final boolean allowPrivate = !secure
             || getAllowPrivateNotifications(context, UserHandle.myUserId());
         return !enabled ? R.string.lock_screen_notifications_summary_disable :
             allowPrivate ? R.string.lock_screen_notifications_summary_show :
                 R.string.lock_screen_notifications_summary_hide;
     }

     private void updateLockscreenNotifications() {
         if (mLockscreen == null) {
             return;
         }
         mLockscreenSelectedValue = getSummaryResource(mContext);
         mLockscreen.setSummary("%s");
         mLockscreen.setValue(Integer.toString(mLockscreenSelectedValue));
     }

     private boolean adminAllowsUnredactedNotifications(int userId) {
         final int dpmFlags = mContext.getSystemService(DevicePolicyManager.class)
                 .getKeyguardDisabledFeatures(null/* admin */, userId);
         return (dpmFlags & KEYGUARD_DISABLE_UNREDACTED_NOTIFICATIONS) == 0;
     }

     private void updateLockscreenNotificationsForProfile() {
         if (mProfileUserId == UserHandle.USER_NULL) {
             return;
         }
         if (mLockscreenProfile == null) {
             return;
         }
         final boolean allowPrivate = adminAllowsUnredactedNotifications(mProfileUserId) &&
                 (!mSecureProfile || getAllowPrivateNotifications(mContext, mProfileUserId));
         mLockscreenProfile.setSummary("%s");
         mLockscreenSelectedValueProfile = allowPrivate
                         ? R.string.lock_screen_notifications_summary_show_profile
                         : R.string.lock_screen_notifications_summary_hide_profile;
         mLockscreenProfile.setValue(Integer.toString(mLockscreenSelectedValueProfile));
     }

     private static boolean getLockscreenNotificationsEnabled(Context context) {
         return Settings.Secure.getInt(context.getContentResolver(),
                 Settings.Secure.LOCK_SCREEN_SHOW_NOTIFICATIONS, 0) != 0;
     }

     private static boolean getAllowPrivateNotifications(Context context, int userId) {
         return Settings.Secure.getIntForUser(context.getContentResolver(),
                 Settings.Secure.LOCK_SCREEN_ALLOW_PRIVATE_NOTIFICATIONS, 0, userId) != 0;
     }

     class SettingObserver extends ContentObserver {

         private final Uri LOCK_SCREEN_PRIVATE_URI =
                 Settings.Secure.getUriFor(Settings.Secure.LOCK_SCREEN_ALLOW_PRIVATE_NOTIFICATIONS);
         private final Uri LOCK_SCREEN_SHOW_URI =
                 Settings.Secure.getUriFor(Settings.Secure.LOCK_SCREEN_SHOW_NOTIFICATIONS);

         public SettingObserver() {
             super(new Handler());
         }

         public void register(ContentResolver cr, boolean register) {
             if (register) {
                 cr.registerContentObserver(LOCK_SCREEN_PRIVATE_URI, false, this);
                 cr.registerContentObserver(LOCK_SCREEN_SHOW_URI, false, this);
             } else {
                 cr.unregisterContentObserver(this);
             }
         }

         @Override
         public void onChange(boolean selfChange, Uri uri) {
             super.onChange(selfChange, uri);
             if (LOCK_SCREEN_PRIVATE_URI.equals(uri) || LOCK_SCREEN_SHOW_URI.equals(uri)) {
                 updateLockscreenNotifications();
                 if (mProfileUserId != UserHandle.USER_NULL) {
                     updateLockscreenNotificationsForProfile();
                 }
             }
         }
     }
 }
	/*
	* Copyright (C) 2016 The Android Open Source Project
	*
	* Licensed under the Apache License, Version 2.0 (the "License");
	* you may not use this file except in compliance with the License.
	* You may obtain a copy of the License at
	*
	* http://www.apache.org/licenses/LICENSE-2.0
	*
	* Unless required by applicable law or agreed to in writing, software
	* distributed under the License is distributed on an "AS IS" BASIS,
	* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
	* See the License for the specific language governing permissions and
	* limitations under the License.
	*/

	package com.android.settings.notification;

	import static android.app.admin.DevicePolicyManager.KEYGUARD_DISABLE_SECURE_NOTIFICATIONS;
	import static android.app.admin.DevicePolicyManager.KEYGUARD_DISABLE_UNREDACTED_NOTIFICATIONS;
	import static android.app.admin.DevicePolicyResources.Strings.Settings.LOCK_SCREEN_HIDE_WORK_NOTIFICATION_CONTENT;
	import static android.app.admin.DevicePolicyResources.Strings.Settings.LOCK_SCREEN_SHOW_WORK_NOTIFICATION_CONTENT;

	import android.app.admin.DevicePolicyManager;
	import android.content.ContentResolver;
	import android.content.Context;
	import android.database.ContentObserver;
	import android.net.Uri;
	import android.os.Handler;
	import android.os.UserHandle;
	import android.os.UserManager;
	import android.provider.Settings;
	import android.text.TextUtils;
	import android.util.Log;

	import androidx.preference.Preference;
	import androidx.preference.PreferenceScreen;

	import com.android.internal.widget.LockPatternUtils;
	import com.android.settings.R;
	import com.android.settings.RestrictedListPreference;
	import com.android.settings.Utils;
	import com.android.settings.core.PreferenceControllerMixin;
	import com.android.settings.overlay.FeatureFactory;
	import com.android.settingslib.RestrictedLockUtils;
	import com.android.settingslib.RestrictedLockUtilsInternal;
	import com.android.settingslib.core.AbstractPreferenceController;
	import com.android.settingslib.core.lifecycle.LifecycleObserver;
	import com.android.settingslib.core.lifecycle.events.OnPause;
	import com.android.settingslib.core.lifecycle.events.OnResume;

	import java.util.ArrayList;

	public class LockScreenNotificationPreferenceController extends AbstractPreferenceController
	implements PreferenceControllerMixin, Preference.OnPreferenceChangeListener,
	LifecycleObserver, OnResume, OnPause {

	private static final String TAG = "LockScreenNotifPref";

	private final String mSettingKey;
	private final String mWorkSettingCategoryKey;
	private final String mWorkSettingKey;

	private RestrictedListPreference mLockscreen;
	private RestrictedListPreference mLockscreenProfile;

	private final int mProfileUserId;
	private final boolean mSecure;
	private final boolean mSecureProfile;

	private SettingObserver mSettingObserver;
	private int mLockscreenSelectedValue;
	private int mLockscreenSelectedValueProfile;

	public LockScreenNotificationPreferenceController(Context context) {
	this(context, null, null, null);
	}

	public LockScreenNotificationPreferenceController(Context context,
	String settingKey, String workSettingCategoryKey, String workSettingKey) {
	super(context);
	mSettingKey = settingKey;
	mWorkSettingCategoryKey = workSettingCategoryKey;
	mWorkSettingKey = workSettingKey;

	mProfileUserId = Utils.getManagedProfileId(UserManager.get(context), UserHandle.myUserId());
	final LockPatternUtils utils = FeatureFactory.getFeatureFactory()
	.getSecurityFeatureProvider()
	.getLockPatternUtils(context);
	mSecure = utils.isSecure(UserHandle.myUserId());
	mSecureProfile = (mProfileUserId != UserHandle.USER_NULL) && utils.isSecure(mProfileUserId);
	}

	@Override
	public void displayPreference(PreferenceScreen screen) {
	super.displayPreference(screen);
	mLockscreen = screen.findPreference(mSettingKey);
	if (mLockscreen == null) {
	Log.i(TAG, "Preference not found: " + mSettingKey);
	return;
	}
	if (mProfileUserId != UserHandle.USER_NULL) {
	mLockscreenProfile = screen.findPreference(mWorkSettingKey);
	mLockscreenProfile.setRequiresActiveUnlockedProfile(true);
	mLockscreenProfile.setProfileUserId(mProfileUserId);
	} else {
	setVisible(screen, mWorkSettingKey, false /* visible */);
	setVisible(screen, mWorkSettingCategoryKey, false /* visible */);
	}
	mSettingObserver = new SettingObserver();
	initLockScreenNotificationPrefDisplay();
	initLockscreenNotificationPrefForProfile();
	}

	private void initLockScreenNotificationPrefDisplay() {
	ArrayList<CharSequence> entries = new ArrayList<>();
	ArrayList<CharSequence> values = new ArrayList<>();

	String summaryShowEntry =
	mContext.getString(R.string.lock_screen_notifications_summary_show);
	String summaryShowEntryValue =
	Integer.toString(R.string.lock_screen_notifications_summary_show);
	entries.add(summaryShowEntry);
	values.add(summaryShowEntryValue);
	setRestrictedIfNotificationFeaturesDisabled(summaryShowEntry, summaryShowEntryValue,
	KEYGUARD_DISABLE_SECURE_NOTIFICATIONS \| KEYGUARD_DISABLE_UNREDACTED_NOTIFICATIONS);

	if (mSecure) {
	String summaryHideEntry =
	mContext.getString(R.string.lock_screen_notifications_summary_hide);
	String summaryHideEntryValue =
	Integer.toString(R.string.lock_screen_notifications_summary_hide);
	entries.add(summaryHideEntry);
	values.add(summaryHideEntryValue);
	setRestrictedIfNotificationFeaturesDisabled(summaryHideEntry, summaryHideEntryValue,
	KEYGUARD_DISABLE_SECURE_NOTIFICATIONS);
	}

	entries.add(mContext.getString(R.string.lock_screen_notifications_summary_disable));
	values.add(Integer.toString(R.string.lock_screen_notifications_summary_disable));


	mLockscreen.setEntries(entries.toArray(new CharSequence[entries.size()]));
	mLockscreen.setEntryValues(values.toArray(new CharSequence[values.size()]));
	updateLockscreenNotifications();

	if (mLockscreen.getEntries().length > 1) {
	mLockscreen.setOnPreferenceChangeListener(this);
	} else {
	// There is one or less option for the user, disable the drop down.
	mLockscreen.setEnabled(false);
	}
	}

	private void initLockscreenNotificationPrefForProfile() {
	if (mLockscreenProfile == null) {
	Log.i(TAG, "Preference not found: " + mWorkSettingKey);
	return;
	}
	ArrayList<CharSequence> entries = new ArrayList<>();
	ArrayList<CharSequence> values = new ArrayList<>();

	DevicePolicyManager devicePolicyManager =
	mContext.getSystemService(DevicePolicyManager.class);

	String summaryShowEntry = devicePolicyManager
	.getResources().getString(LOCK_SCREEN_SHOW_WORK_NOTIFICATION_CONTENT,
	() -> mContext.getString(
	R.string.lock_screen_notifications_summary_show_profile));
	String summaryShowEntryValue = Integer.toString(
	R.string.lock_screen_notifications_summary_show_profile);
	entries.add(summaryShowEntry);
	values.add(summaryShowEntryValue);
	setRestrictedIfNotificationFeaturesDisabled(summaryShowEntry, summaryShowEntryValue,
	KEYGUARD_DISABLE_SECURE_NOTIFICATIONS \| KEYGUARD_DISABLE_UNREDACTED_NOTIFICATIONS);

	if (mSecureProfile) {
	String summaryHideEntry = devicePolicyManager
	.getResources().getString(LOCK_SCREEN_HIDE_WORK_NOTIFICATION_CONTENT,
	() -> mContext.getString(
	R.string.lock_screen_notifications_summary_hide_profile));
	String summaryHideEntryValue = Integer.toString(
	R.string.lock_screen_notifications_summary_hide_profile);
	entries.add(summaryHideEntry);
	values.add(summaryHideEntryValue);
	setRestrictedIfNotificationFeaturesDisabled(summaryHideEntry, summaryHideEntryValue,
	KEYGUARD_DISABLE_SECURE_NOTIFICATIONS);
	}

	mLockscreenProfile.setEntries(entries.toArray(new CharSequence[entries.size()]));
	mLockscreenProfile.setEntryValues(values.toArray(new CharSequence[values.size()]));
	updateLockscreenNotificationsForProfile();
	if (mLockscreenProfile.getEntries().length > 1) {
	mLockscreenProfile.setOnPreferenceChangeListener(this);
	} else {
	// There is one or less option for the user, disable the drop down.
	mLockscreenProfile.setEnabled(false);
	}
	}

	@Override
	public String getPreferenceKey() {
	return null;
	}

	@Override
	public boolean isAvailable() {
	return false;
	}

	@Override
	public void onResume() {
	if (mSettingObserver != null) {
	mSettingObserver.register(mContext.getContentResolver(), true /* register */);
	}
	}

	@Override
	public void onPause() {
	if (mSettingObserver != null) {
	mSettingObserver.register(mContext.getContentResolver(), false /* register */);
	}
	}

	@Override
	public boolean onPreferenceChange(Preference preference, Object newValue) {
	final String key = preference.getKey();
	if (TextUtils.equals(mWorkSettingKey, key)) {
	final int val = Integer.parseInt((String) newValue);
	if (val == mLockscreenSelectedValueProfile) {
	return false;
	}
	final boolean show = val == R.string.lock_screen_notifications_summary_show_profile;
	Settings.Secure.putIntForUser(mContext.getContentResolver(),
	Settings.Secure.LOCK_SCREEN_ALLOW_PRIVATE_NOTIFICATIONS,
	show ? 1 : 0, mProfileUserId);
	mLockscreenSelectedValueProfile = val;
	return true;
	} else if (TextUtils.equals(mSettingKey, key)) {
	final int val = Integer.parseInt((String) newValue);
	if (val == mLockscreenSelectedValue) {
	return false;
	}
	final boolean enabled = val != R.string.lock_screen_notifications_summary_disable;
	final boolean show = val == R.string.lock_screen_notifications_summary_show;
	Settings.Secure.putInt(mContext.getContentResolver(),
	Settings.Secure.LOCK_SCREEN_ALLOW_PRIVATE_NOTIFICATIONS, show ? 1 : 0);
	Settings.Secure.putInt(mContext.getContentResolver(),
	Settings.Secure.LOCK_SCREEN_SHOW_NOTIFICATIONS, enabled ? 1 : 0);
	mLockscreenSelectedValue = val;
	return true;
	}
	return false;
	}

	private void setRestrictedIfNotificationFeaturesDisabled(CharSequence entry,
	CharSequence entryValue, int keyguardNotificationFeatures) {
	RestrictedLockUtils.EnforcedAdmin admin =
	RestrictedLockUtilsInternal.checkIfKeyguardFeaturesDisabled(
	mContext, keyguardNotificationFeatures, UserHandle.myUserId());
	if (admin != null && mLockscreen != null) {
	RestrictedListPreference.RestrictedItem item =
	new RestrictedListPreference.RestrictedItem(entry, entryValue, admin);
	mLockscreen.addRestrictedItem(item);
	}
	if (mProfileUserId != UserHandle.USER_NULL) {
	RestrictedLockUtils.EnforcedAdmin profileAdmin =
	RestrictedLockUtilsInternal.checkIfKeyguardFeaturesDisabled(
	mContext, keyguardNotificationFeatures, mProfileUserId);
	if (profileAdmin != null && mLockscreenProfile != null) {
	RestrictedListPreference.RestrictedItem item =
	new RestrictedListPreference.RestrictedItem(
	entry, entryValue, profileAdmin);
	mLockscreenProfile.addRestrictedItem(item);
	}
	}
	}

	public static int getSummaryResource(Context context) {
	final boolean enabled = getLockscreenNotificationsEnabled(context);
	final boolean secure = FeatureFactory.getFeatureFactory()
	.getSecurityFeatureProvider()
	.getLockPatternUtils(context)
	.isSecure(UserHandle.myUserId());
	final boolean allowPrivate = !secure
	\|\| getAllowPrivateNotifications(context, UserHandle.myUserId());
	return !enabled ? R.string.lock_screen_notifications_summary_disable :
	allowPrivate ? R.string.lock_screen_notifications_summary_show :
	R.string.lock_screen_notifications_summary_hide;
	}

	private void updateLockscreenNotifications() {
	if (mLockscreen == null) {
	return;
	}
	mLockscreenSelectedValue = getSummaryResource(mContext);
	mLockscreen.setSummary("%s");
	mLockscreen.setValue(Integer.toString(mLockscreenSelectedValue));
	}

	private boolean adminAllowsUnredactedNotifications(int userId) {
	final int dpmFlags = mContext.getSystemService(DevicePolicyManager.class)
	.getKeyguardDisabledFeatures(null/* admin */, userId);
	return (dpmFlags & KEYGUARD_DISABLE_UNREDACTED_NOTIFICATIONS) == 0;
	}

	private void updateLockscreenNotificationsForProfile() {
	if (mProfileUserId == UserHandle.USER_NULL) {
	return;
	}
	if (mLockscreenProfile == null) {
	return;
	}
	final boolean allowPrivate = adminAllowsUnredactedNotifications(mProfileUserId) &&
	(!mSecureProfile \|\| getAllowPrivateNotifications(mContext, mProfileUserId));
	mLockscreenProfile.setSummary("%s");
	mLockscreenSelectedValueProfile = allowPrivate
	? R.string.lock_screen_notifications_summary_show_profile
	: R.string.lock_screen_notifications_summary_hide_profile;
	mLockscreenProfile.setValue(Integer.toString(mLockscreenSelectedValueProfile));
	}

	private static boolean getLockscreenNotificationsEnabled(Context context) {
	return Settings.Secure.getInt(context.getContentResolver(),
	Settings.Secure.LOCK_SCREEN_SHOW_NOTIFICATIONS, 0) != 0;
	}

	private static boolean getAllowPrivateNotifications(Context context, int userId) {
	return Settings.Secure.getIntForUser(context.getContentResolver(),
	Settings.Secure.LOCK_SCREEN_ALLOW_PRIVATE_NOTIFICATIONS, 0, userId) != 0;
	}

	class SettingObserver extends ContentObserver {

	private final Uri LOCK_SCREEN_PRIVATE_URI =
	Settings.Secure.getUriFor(Settings.Secure.LOCK_SCREEN_ALLOW_PRIVATE_NOTIFICATIONS);
	private final Uri LOCK_SCREEN_SHOW_URI =
	Settings.Secure.getUriFor(Settings.Secure.LOCK_SCREEN_SHOW_NOTIFICATIONS);

	public SettingObserver() {
	super(new Handler());
	}

	public void register(ContentResolver cr, boolean register) {
	if (register) {
	cr.registerContentObserver(LOCK_SCREEN_PRIVATE_URI, false, this);
	cr.registerContentObserver(LOCK_SCREEN_SHOW_URI, false, this);
	} else {
	cr.unregisterContentObserver(this);
	}
	}

	@Override
	public void onChange(boolean selfChange, Uri uri) {
	super.onChange(selfChange, uri);
	if (LOCK_SCREEN_PRIVATE_URI.equals(uri) \|\| LOCK_SCREEN_SHOW_URI.equals(uri)) {
	updateLockscreenNotifications();
	if (mProfileUserId != UserHandle.USER_NULL) {
	updateLockscreenNotificationsForProfile();
	}
	}
	}
	}
	}