src/com/android/contacts/preference/ContactsPreferences.java - platform/packages/apps/Contacts - Git at Google

 /*
  * Copyright (C) 2010 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.contacts.preference;

 import android.app.backup.BackupAgent;
 import android.app.backup.BackupManager;
 import android.content.Context;
 import android.content.SharedPreferences;
 import android.content.SharedPreferences.Editor;
 import android.content.SharedPreferences.OnSharedPreferenceChangeListener;
 import android.os.Handler;
 import android.os.Looper;
 import android.preference.PreferenceManager;
 import android.provider.Settings;
 import android.provider.Settings.SettingNotFoundException;
 import androidx.annotation.NonNull;
 import androidx.annotation.VisibleForTesting;
 import android.text.TextUtils;

 import com.android.contacts.R;
 import com.android.contacts.model.account.AccountWithDataSet;

 import java.util.List;

 /**
  * Manages user preferences for contacts.
  */
 public class ContactsPreferences implements OnSharedPreferenceChangeListener {

     /**
      * The value for the DISPLAY_ORDER key to show the given name first.
      */
     public static final int DISPLAY_ORDER_PRIMARY = 1;

     /**
      * The value for the DISPLAY_ORDER key to show the family name first.
      */
     public static final int DISPLAY_ORDER_ALTERNATIVE = 2;

     public static final String DISPLAY_ORDER_KEY = "android.contacts.DISPLAY_ORDER";

     /**
      * The value for the SORT_ORDER key corresponding to sort by given name first.
      */
     public static final int SORT_ORDER_PRIMARY = 1;

     public static final String SORT_ORDER_KEY = "android.contacts.SORT_ORDER";

     /**
      * The value for the SORT_ORDER key corresponding to sort by family name first.
      */
     public static final int SORT_ORDER_ALTERNATIVE = 2;

     public static final String PREF_DISPLAY_ONLY_PHONES = "only_phones";

     public static final boolean PREF_DISPLAY_ONLY_PHONES_DEFAULT = false;

     public static final String PHONETIC_NAME_DISPLAY_KEY = "Phonetic_name_display";

     /**
      * Value to use when a preference is unassigned and needs to be read from the shared preferences
      */
     private static final int PREFERENCE_UNASSIGNED = -1;

     private final Context mContext;
     private int mSortOrder = PREFERENCE_UNASSIGNED;
     private int mDisplayOrder = PREFERENCE_UNASSIGNED;
     private int mPhoneticNameDisplayPreference = PREFERENCE_UNASSIGNED;

     private AccountWithDataSet mDefaultAccount = null;
     private ChangeListener mListener = null;
     private Handler mHandler;
     private final SharedPreferences mPreferences;
     private final BackupManager mBackupManager;
     private final boolean mIsDefaultAccountUserChangeable;
     private String mDefaultAccountKey;

     public ContactsPreferences(Context context) {
         this(context,
                 context.getResources().getBoolean(R.bool.config_default_account_user_changeable));
     }

     @VisibleForTesting
     ContactsPreferences(Context context, boolean isDefaultAccountUserChangeable) {
         mContext = context;
         mIsDefaultAccountUserChangeable = isDefaultAccountUserChangeable;

         mBackupManager = new BackupManager(mContext);

         mHandler = new Handler(Looper.getMainLooper());
         mPreferences = mContext.getSharedPreferences(context.getPackageName(),
                 Context.MODE_PRIVATE);
         mDefaultAccountKey = mContext.getResources().getString(
                 R.string.contact_editor_default_account_key);
         maybeMigrateSystemSettings();
     }

     public boolean isSortOrderUserChangeable() {
         return mContext.getResources().getBoolean(R.bool.config_sort_order_user_changeable);
     }

     public int getDefaultSortOrder() {
         if (mContext.getResources().getBoolean(R.bool.config_default_sort_order_primary)) {
             return SORT_ORDER_PRIMARY;
         } else {
             return SORT_ORDER_ALTERNATIVE;
         }
     }

     public int getSortOrder() {
         if (!isSortOrderUserChangeable()) {
             return getDefaultSortOrder();
         }
         if (mSortOrder == PREFERENCE_UNASSIGNED) {
             mSortOrder = mPreferences.getInt(SORT_ORDER_KEY, getDefaultSortOrder());
         }
         return mSortOrder;
     }

     public void setSortOrder(int sortOrder) {
         mSortOrder = sortOrder;
         final Editor editor = mPreferences.edit();
         editor.putInt(SORT_ORDER_KEY, sortOrder);
         editor.commit();
         mBackupManager.dataChanged();
     }

     public boolean isDisplayOrderUserChangeable() {
         return mContext.getResources().getBoolean(R.bool.config_display_order_user_changeable);
     }

     public int getDefaultDisplayOrder() {
         if (mContext.getResources().getBoolean(R.bool.config_default_display_order_primary)) {
             return DISPLAY_ORDER_PRIMARY;
         } else {
             return DISPLAY_ORDER_ALTERNATIVE;
         }
     }

     public int getDisplayOrder() {
         if (!isDisplayOrderUserChangeable()) {
             return getDefaultDisplayOrder();
         }
         if (mDisplayOrder == PREFERENCE_UNASSIGNED) {
             mDisplayOrder = mPreferences.getInt(DISPLAY_ORDER_KEY, getDefaultDisplayOrder());
         }
         return mDisplayOrder;
     }

     public void setDisplayOrder(int displayOrder) {
         mDisplayOrder = displayOrder;
         final Editor editor = mPreferences.edit();
         editor.putInt(DISPLAY_ORDER_KEY, displayOrder);
         editor.commit();
         mBackupManager.dataChanged();
     }

     public int getDefaultPhoneticNameDisplayPreference() {
         if (mContext.getResources().getBoolean(R.bool.config_default_hide_phonetic_name_if_empty)) {
             return PhoneticNameDisplayPreference.HIDE_IF_EMPTY;
         } else {
             return PhoneticNameDisplayPreference.SHOW_ALWAYS;
         }
     }

     public boolean isPhoneticNameDisplayPreferenceChangeable() {
         return mContext.getResources().getBoolean(
                 R.bool.config_phonetic_name_display_user_changeable);
     }

     public void setPhoneticNameDisplayPreference(int phoneticNameDisplayPreference) {
         mPhoneticNameDisplayPreference = phoneticNameDisplayPreference;
         final Editor editor = mPreferences.edit();
         editor.putInt(PHONETIC_NAME_DISPLAY_KEY, phoneticNameDisplayPreference);
         editor.commit();
         mBackupManager.dataChanged();
     }

     public int getPhoneticNameDisplayPreference() {
         if (!isPhoneticNameDisplayPreferenceChangeable()) {
             return getDefaultPhoneticNameDisplayPreference();
         }
         if (mPhoneticNameDisplayPreference == PREFERENCE_UNASSIGNED) {
             mPhoneticNameDisplayPreference = mPreferences.getInt(PHONETIC_NAME_DISPLAY_KEY,
                     getDefaultPhoneticNameDisplayPreference());
         }
         return mPhoneticNameDisplayPreference;
     }

     public boolean shouldHidePhoneticNamesIfEmpty() {
         return getPhoneticNameDisplayPreference() == PhoneticNameDisplayPreference.HIDE_IF_EMPTY;
     }

     public boolean isDefaultAccountUserChangeable() {
         return mIsDefaultAccountUserChangeable;
     }

     public AccountWithDataSet getDefaultAccount() {
         if (!isDefaultAccountUserChangeable()) {
             return mDefaultAccount;
         }
         if (mDefaultAccount == null) {
             final String accountString = mPreferences
                     .getString(mDefaultAccountKey, null);
             if (!TextUtils.isEmpty(accountString)) {
                 mDefaultAccount = AccountWithDataSet.unstringify(accountString);
             }
         }
         return mDefaultAccount;
     }

     public void clearDefaultAccount() {
         mDefaultAccount = null;
         mPreferences.edit().remove(mDefaultAccountKey).commit();
     }

     public void setDefaultAccount(@NonNull AccountWithDataSet accountWithDataSet) {
         if (accountWithDataSet == null) {
             throw new IllegalArgumentException(
                     "argument should not be null");
         }
         mDefaultAccount = accountWithDataSet;
         mPreferences.edit().putString(mDefaultAccountKey, accountWithDataSet.stringify()).commit();
     }

     public boolean isDefaultAccountSet() {
         return mDefaultAccount != null || mPreferences.contains(mDefaultAccountKey);
     }

     /**
      * @return false if there is only one writable account or no requirement to return true is met.
      *         true if the contact editor should show the "accounts changed" notification, that is:
      *              - If it's the first launch.
      *              - Or, if the default account has been removed.
      *              (And some extra sanity check)
      *
      * Note if this method returns {@code false}, the caller can safely assume that
      * {@link #getDefaultAccount} will return a valid account.  (Either an account which still
      * exists, or {@code null} which should be interpreted as "local only".)
      */
     public boolean shouldShowAccountChangedNotification(List<AccountWithDataSet>
             currentWritableAccounts) {
         final AccountWithDataSet defaultAccount = getDefaultAccount();

         // This shouldn't occur anymore because a "device" account is added in the case that there
         // are no other accounts but if there are no writable accounts then the default has been
         // initialized if it is "device"
         if (currentWritableAccounts.isEmpty()) {
             return defaultAccount == null || !defaultAccount.isNullAccount();
         }

         if (currentWritableAccounts.size() == 1
                 && !currentWritableAccounts.get(0).isNullAccount()) {
             return false;
         }

         if (defaultAccount == null) {
             return true;
         }

         if (!currentWritableAccounts.contains(defaultAccount)) {
             return true;
         }

         // All good.
         return false;
     }

     public void registerChangeListener(ChangeListener listener) {
         if (mListener != null) unregisterChangeListener();

         mListener = listener;

         // Reset preferences to "unknown" because they may have changed while the
         // listener was unregistered.
         mDisplayOrder = PREFERENCE_UNASSIGNED;
         mSortOrder = PREFERENCE_UNASSIGNED;
         mPhoneticNameDisplayPreference = PREFERENCE_UNASSIGNED;
         mDefaultAccount = null;

         mPreferences.registerOnSharedPreferenceChangeListener(this);
     }

     public void unregisterChangeListener() {
         if (mListener != null) {
             mListener = null;
         }

         mPreferences.unregisterOnSharedPreferenceChangeListener(this);
     }

     @Override
     public void onSharedPreferenceChanged(SharedPreferences sharedPreferences, final String key) {
         // This notification is not sent on the Ui thread. Use the previously created Handler
         // to switch to the Ui thread
         mHandler.post(new Runnable() {
             @Override
             public void run() {
                 refreshValue(key);
             }
         });
     }

     /**
      * Forces the value for the given key to be looked up from shared preferences and notifies
      * the registered {@link ChangeListener}
      *
      * @param key the {@link SharedPreferences} key to look up
      */
     public void refreshValue(String key) {
         if (DISPLAY_ORDER_KEY.equals(key)) {
             mDisplayOrder = PREFERENCE_UNASSIGNED;
             mDisplayOrder = getDisplayOrder();
         } else if (SORT_ORDER_KEY.equals(key)) {
             mSortOrder = PREFERENCE_UNASSIGNED;
             mSortOrder = getSortOrder();
         } else if (PHONETIC_NAME_DISPLAY_KEY.equals(key)) {
             mPhoneticNameDisplayPreference = PREFERENCE_UNASSIGNED;
             mPhoneticNameDisplayPreference = getPhoneticNameDisplayPreference();
         } else if (mDefaultAccountKey.equals(key)) {
             mDefaultAccount = null;
             mDefaultAccount = getDefaultAccount();
         }
         if (mListener != null) mListener.onChange();
     }

     public interface ChangeListener {
         void onChange();
     }

     /**
      * If there are currently no preferences (which means this is the first time we are run),
      * For sort order and display order, check to see if there are any preferences stored in
      * system settings (pre-L) which can be copied into our own SharedPreferences.
      * For default account setting, check to see if there are any preferences stored in the previous
      * SharedPreferences which can be copied into current SharedPreferences.
      */
     private void maybeMigrateSystemSettings() {
         if (!mPreferences.contains(SORT_ORDER_KEY)) {
             int sortOrder = getDefaultSortOrder();
             try {
                  sortOrder = Settings.System.getInt(mContext.getContentResolver(),
                         SORT_ORDER_KEY);
             } catch (SettingNotFoundException e) {
             }
             setSortOrder(sortOrder);
         }

         if (!mPreferences.contains(DISPLAY_ORDER_KEY)) {
             int displayOrder = getDefaultDisplayOrder();
             try {
                 displayOrder = Settings.System.getInt(mContext.getContentResolver(),
                         DISPLAY_ORDER_KEY);
             } catch (SettingNotFoundException e) {
             }
             setDisplayOrder(displayOrder);
         }

         if (!mPreferences.contains(PHONETIC_NAME_DISPLAY_KEY)) {
             int phoneticNameFieldsDisplay = getDefaultPhoneticNameDisplayPreference();
             try {
                 phoneticNameFieldsDisplay = Settings.System.getInt(mContext.getContentResolver(),
                         PHONETIC_NAME_DISPLAY_KEY);
             } catch (SettingNotFoundException e) {
             }
             setPhoneticNameDisplayPreference(phoneticNameFieldsDisplay);
         }

         if (!mPreferences.contains(mDefaultAccountKey)) {
             final SharedPreferences previousPrefs =
                     PreferenceManager.getDefaultSharedPreferences(mContext);
             final String defaultAccount = previousPrefs.getString(mDefaultAccountKey, null);
             if (!TextUtils.isEmpty(defaultAccount)) {
                 final AccountWithDataSet accountWithDataSet = AccountWithDataSet.unstringify(
                         defaultAccount);
                 setDefaultAccount(accountWithDataSet);
             }
         }
     }

 }
	/*
	* Copyright (C) 2010 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.contacts.preference;

	import android.app.backup.BackupAgent;
	import android.app.backup.BackupManager;
	import android.content.Context;
	import android.content.SharedPreferences;
	import android.content.SharedPreferences.Editor;
	import android.content.SharedPreferences.OnSharedPreferenceChangeListener;
	import android.os.Handler;
	import android.os.Looper;
	import android.preference.PreferenceManager;
	import android.provider.Settings;
	import android.provider.Settings.SettingNotFoundException;
	import androidx.annotation.NonNull;
	import androidx.annotation.VisibleForTesting;
	import android.text.TextUtils;

	import com.android.contacts.R;
	import com.android.contacts.model.account.AccountWithDataSet;

	import java.util.List;

	/**
	* Manages user preferences for contacts.
	*/
	public class ContactsPreferences implements OnSharedPreferenceChangeListener {

	/**
	* The value for the DISPLAY_ORDER key to show the given name first.
	*/
	public static final int DISPLAY_ORDER_PRIMARY = 1;

	/**
	* The value for the DISPLAY_ORDER key to show the family name first.
	*/
	public static final int DISPLAY_ORDER_ALTERNATIVE = 2;

	public static final String DISPLAY_ORDER_KEY = "android.contacts.DISPLAY_ORDER";

	/**
	* The value for the SORT_ORDER key corresponding to sort by given name first.
	*/
	public static final int SORT_ORDER_PRIMARY = 1;

	public static final String SORT_ORDER_KEY = "android.contacts.SORT_ORDER";

	/**
	* The value for the SORT_ORDER key corresponding to sort by family name first.
	*/
	public static final int SORT_ORDER_ALTERNATIVE = 2;

	public static final String PREF_DISPLAY_ONLY_PHONES = "only_phones";

	public static final boolean PREF_DISPLAY_ONLY_PHONES_DEFAULT = false;

	public static final String PHONETIC_NAME_DISPLAY_KEY = "Phonetic_name_display";

	/**
	* Value to use when a preference is unassigned and needs to be read from the shared preferences
	*/
	private static final int PREFERENCE_UNASSIGNED = -1;

	private final Context mContext;
	private int mSortOrder = PREFERENCE_UNASSIGNED;
	private int mDisplayOrder = PREFERENCE_UNASSIGNED;
	private int mPhoneticNameDisplayPreference = PREFERENCE_UNASSIGNED;

	private AccountWithDataSet mDefaultAccount = null;
	private ChangeListener mListener = null;
	private Handler mHandler;
	private final SharedPreferences mPreferences;
	private final BackupManager mBackupManager;
	private final boolean mIsDefaultAccountUserChangeable;
	private String mDefaultAccountKey;

	public ContactsPreferences(Context context) {
	this(context,
	context.getResources().getBoolean(R.bool.config_default_account_user_changeable));
	}

	@VisibleForTesting
	ContactsPreferences(Context context, boolean isDefaultAccountUserChangeable) {
	mContext = context;
	mIsDefaultAccountUserChangeable = isDefaultAccountUserChangeable;

	mBackupManager = new BackupManager(mContext);

	mHandler = new Handler(Looper.getMainLooper());
	mPreferences = mContext.getSharedPreferences(context.getPackageName(),
	Context.MODE_PRIVATE);
	mDefaultAccountKey = mContext.getResources().getString(
	R.string.contact_editor_default_account_key);
	maybeMigrateSystemSettings();
	}

	public boolean isSortOrderUserChangeable() {
	return mContext.getResources().getBoolean(R.bool.config_sort_order_user_changeable);
	}

	public int getDefaultSortOrder() {
	if (mContext.getResources().getBoolean(R.bool.config_default_sort_order_primary)) {
	return SORT_ORDER_PRIMARY;
	} else {
	return SORT_ORDER_ALTERNATIVE;
	}
	}

	public int getSortOrder() {
	if (!isSortOrderUserChangeable()) {
	return getDefaultSortOrder();
	}
	if (mSortOrder == PREFERENCE_UNASSIGNED) {
	mSortOrder = mPreferences.getInt(SORT_ORDER_KEY, getDefaultSortOrder());
	}
	return mSortOrder;
	}

	public void setSortOrder(int sortOrder) {
	mSortOrder = sortOrder;
	final Editor editor = mPreferences.edit();
	editor.putInt(SORT_ORDER_KEY, sortOrder);
	editor.commit();
	mBackupManager.dataChanged();
	}

	public boolean isDisplayOrderUserChangeable() {
	return mContext.getResources().getBoolean(R.bool.config_display_order_user_changeable);
	}

	public int getDefaultDisplayOrder() {
	if (mContext.getResources().getBoolean(R.bool.config_default_display_order_primary)) {
	return DISPLAY_ORDER_PRIMARY;
	} else {
	return DISPLAY_ORDER_ALTERNATIVE;
	}
	}

	public int getDisplayOrder() {
	if (!isDisplayOrderUserChangeable()) {
	return getDefaultDisplayOrder();
	}
	if (mDisplayOrder == PREFERENCE_UNASSIGNED) {
	mDisplayOrder = mPreferences.getInt(DISPLAY_ORDER_KEY, getDefaultDisplayOrder());
	}
	return mDisplayOrder;
	}

	public void setDisplayOrder(int displayOrder) {
	mDisplayOrder = displayOrder;
	final Editor editor = mPreferences.edit();
	editor.putInt(DISPLAY_ORDER_KEY, displayOrder);
	editor.commit();
	mBackupManager.dataChanged();
	}

	public int getDefaultPhoneticNameDisplayPreference() {
	if (mContext.getResources().getBoolean(R.bool.config_default_hide_phonetic_name_if_empty)) {
	return PhoneticNameDisplayPreference.HIDE_IF_EMPTY;
	} else {
	return PhoneticNameDisplayPreference.SHOW_ALWAYS;
	}
	}

	public boolean isPhoneticNameDisplayPreferenceChangeable() {
	return mContext.getResources().getBoolean(
	R.bool.config_phonetic_name_display_user_changeable);
	}

	public void setPhoneticNameDisplayPreference(int phoneticNameDisplayPreference) {
	mPhoneticNameDisplayPreference = phoneticNameDisplayPreference;
	final Editor editor = mPreferences.edit();
	editor.putInt(PHONETIC_NAME_DISPLAY_KEY, phoneticNameDisplayPreference);
	editor.commit();
	mBackupManager.dataChanged();
	}

	public int getPhoneticNameDisplayPreference() {
	if (!isPhoneticNameDisplayPreferenceChangeable()) {
	return getDefaultPhoneticNameDisplayPreference();
	}
	if (mPhoneticNameDisplayPreference == PREFERENCE_UNASSIGNED) {
	mPhoneticNameDisplayPreference = mPreferences.getInt(PHONETIC_NAME_DISPLAY_KEY,
	getDefaultPhoneticNameDisplayPreference());
	}
	return mPhoneticNameDisplayPreference;
	}

	public boolean shouldHidePhoneticNamesIfEmpty() {
	return getPhoneticNameDisplayPreference() == PhoneticNameDisplayPreference.HIDE_IF_EMPTY;
	}

	public boolean isDefaultAccountUserChangeable() {
	return mIsDefaultAccountUserChangeable;
	}

	public AccountWithDataSet getDefaultAccount() {
	if (!isDefaultAccountUserChangeable()) {
	return mDefaultAccount;
	}
	if (mDefaultAccount == null) {
	final String accountString = mPreferences
	.getString(mDefaultAccountKey, null);
	if (!TextUtils.isEmpty(accountString)) {
	mDefaultAccount = AccountWithDataSet.unstringify(accountString);
	}
	}
	return mDefaultAccount;
	}

	public void clearDefaultAccount() {
	mDefaultAccount = null;
	mPreferences.edit().remove(mDefaultAccountKey).commit();
	}

	public void setDefaultAccount(@NonNull AccountWithDataSet accountWithDataSet) {
	if (accountWithDataSet == null) {
	throw new IllegalArgumentException(
	"argument should not be null");
	}
	mDefaultAccount = accountWithDataSet;
	mPreferences.edit().putString(mDefaultAccountKey, accountWithDataSet.stringify()).commit();
	}

	public boolean isDefaultAccountSet() {
	return mDefaultAccount != null \|\| mPreferences.contains(mDefaultAccountKey);
	}

	/**
	* @return false if there is only one writable account or no requirement to return true is met.
	* true if the contact editor should show the "accounts changed" notification, that is:
	* - If it's the first launch.
	* - Or, if the default account has been removed.
	* (And some extra sanity check)
	*
	* Note if this method returns {@code false}, the caller can safely assume that
	* {@link #getDefaultAccount} will return a valid account. (Either an account which still
	* exists, or {@code null} which should be interpreted as "local only".)
	*/
	public boolean shouldShowAccountChangedNotification(List<AccountWithDataSet>
	currentWritableAccounts) {
	final AccountWithDataSet defaultAccount = getDefaultAccount();

	// This shouldn't occur anymore because a "device" account is added in the case that there
	// are no other accounts but if there are no writable accounts then the default has been
	// initialized if it is "device"
	if (currentWritableAccounts.isEmpty()) {
	return defaultAccount == null \|\| !defaultAccount.isNullAccount();
	}

	if (currentWritableAccounts.size() == 1
	&& !currentWritableAccounts.get(0).isNullAccount()) {
	return false;
	}

	if (defaultAccount == null) {
	return true;
	}

	if (!currentWritableAccounts.contains(defaultAccount)) {
	return true;
	}

	// All good.
	return false;
	}

	public void registerChangeListener(ChangeListener listener) {
	if (mListener != null) unregisterChangeListener();

	mListener = listener;

	// Reset preferences to "unknown" because they may have changed while the
	// listener was unregistered.
	mDisplayOrder = PREFERENCE_UNASSIGNED;
	mSortOrder = PREFERENCE_UNASSIGNED;
	mPhoneticNameDisplayPreference = PREFERENCE_UNASSIGNED;
	mDefaultAccount = null;

	mPreferences.registerOnSharedPreferenceChangeListener(this);
	}

	public void unregisterChangeListener() {
	if (mListener != null) {
	mListener = null;
	}

	mPreferences.unregisterOnSharedPreferenceChangeListener(this);
	}

	@Override
	public void onSharedPreferenceChanged(SharedPreferences sharedPreferences, final String key) {
	// This notification is not sent on the Ui thread. Use the previously created Handler
	// to switch to the Ui thread
	mHandler.post(new Runnable() {
	@Override
	public void run() {
	refreshValue(key);
	}
	});
	}

	/**
	* Forces the value for the given key to be looked up from shared preferences and notifies
	* the registered {@link ChangeListener}
	*
	* @param key the {@link SharedPreferences} key to look up
	*/
	public void refreshValue(String key) {
	if (DISPLAY_ORDER_KEY.equals(key)) {
	mDisplayOrder = PREFERENCE_UNASSIGNED;
	mDisplayOrder = getDisplayOrder();
	} else if (SORT_ORDER_KEY.equals(key)) {
	mSortOrder = PREFERENCE_UNASSIGNED;
	mSortOrder = getSortOrder();
	} else if (PHONETIC_NAME_DISPLAY_KEY.equals(key)) {
	mPhoneticNameDisplayPreference = PREFERENCE_UNASSIGNED;
	mPhoneticNameDisplayPreference = getPhoneticNameDisplayPreference();
	} else if (mDefaultAccountKey.equals(key)) {
	mDefaultAccount = null;
	mDefaultAccount = getDefaultAccount();
	}
	if (mListener != null) mListener.onChange();
	}

	public interface ChangeListener {
	void onChange();
	}

	/**
	* If there are currently no preferences (which means this is the first time we are run),
	* For sort order and display order, check to see if there are any preferences stored in
	* system settings (pre-L) which can be copied into our own SharedPreferences.
	* For default account setting, check to see if there are any preferences stored in the previous
	* SharedPreferences which can be copied into current SharedPreferences.
	*/
	private void maybeMigrateSystemSettings() {
	if (!mPreferences.contains(SORT_ORDER_KEY)) {
	int sortOrder = getDefaultSortOrder();
	try {
	sortOrder = Settings.System.getInt(mContext.getContentResolver(),
	SORT_ORDER_KEY);
	} catch (SettingNotFoundException e) {
	}
	setSortOrder(sortOrder);
	}

	if (!mPreferences.contains(DISPLAY_ORDER_KEY)) {
	int displayOrder = getDefaultDisplayOrder();
	try {
	displayOrder = Settings.System.getInt(mContext.getContentResolver(),
	DISPLAY_ORDER_KEY);
	} catch (SettingNotFoundException e) {
	}
	setDisplayOrder(displayOrder);
	}

	if (!mPreferences.contains(PHONETIC_NAME_DISPLAY_KEY)) {
	int phoneticNameFieldsDisplay = getDefaultPhoneticNameDisplayPreference();
	try {
	phoneticNameFieldsDisplay = Settings.System.getInt(mContext.getContentResolver(),
	PHONETIC_NAME_DISPLAY_KEY);
	} catch (SettingNotFoundException e) {
	}
	setPhoneticNameDisplayPreference(phoneticNameFieldsDisplay);
	}

	if (!mPreferences.contains(mDefaultAccountKey)) {
	final SharedPreferences previousPrefs =
	PreferenceManager.getDefaultSharedPreferences(mContext);
	final String defaultAccount = previousPrefs.getString(mDefaultAccountKey, null);
	if (!TextUtils.isEmpty(defaultAccount)) {
	final AccountWithDataSet accountWithDataSet = AccountWithDataSet.unstringify(
	defaultAccount);
	setDefaultAccount(accountWithDataSet);
	}
	}
	}

	}