src/com/android/settings/accounts/ManageAccountsSettings.java - LeafOS-Project/android_packages_apps_Settings - Gitiles

 /*
  * Copyright (C) 2008 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.accounts;

 import android.accounts.Account;
 import android.accounts.AccountManager;
 import android.accounts.AuthenticatorDescription;
 import android.app.ActionBar;
 import android.app.Activity;
 import android.content.ContentResolver;
 import android.content.Intent;
 import android.content.SyncAdapterType;
 import android.content.SyncInfo;
 import android.content.SyncStatusInfo;
 import android.content.pm.ActivityInfo;
 import android.content.pm.ApplicationInfo;
 import android.content.pm.PackageManager;
 import android.content.pm.PackageManager.NameNotFoundException;
 import android.content.pm.ResolveInfo;
 import android.graphics.drawable.Drawable;
 import android.os.Bundle;
 import android.os.UserHandle;
 import android.preference.Preference;
 import android.preference.Preference.OnPreferenceClickListener;
 import android.preference.PreferenceScreen;
 import android.util.Log;
 import android.view.LayoutInflater;
 import android.view.Menu;
 import android.view.MenuInflater;
 import android.view.MenuItem;
 import android.view.View;
 import android.view.ViewGroup;
 import android.widget.ListView;
 import android.widget.TextView;

 import com.android.internal.logging.MetricsLogger;
 import com.android.settings.AccountPreference;
 import com.android.settings.R;
 import com.android.settings.SettingsActivity;
 import com.android.settings.Utils;
 import com.android.settings.location.LocationSettings;

 import java.util.ArrayList;
 import java.util.Date;
 import java.util.HashSet;
 import java.util.List;

 import static android.content.Intent.EXTRA_USER;

 /** Manages settings for Google Account. */
 public class ManageAccountsSettings extends AccountPreferenceBase
         implements AuthenticatorHelper.OnAccountsUpdateListener {
     private static final String ACCOUNT_KEY = "account"; // to pass to auth settings
     public static final String KEY_ACCOUNT_TYPE = "account_type";
     public static final String KEY_ACCOUNT_LABEL = "account_label";

     // Action name for the broadcast intent when the Google account preferences page is launching
     // the location settings.
     private static final String LAUNCHING_LOCATION_SETTINGS =
             "com.android.settings.accounts.LAUNCHING_LOCATION_SETTINGS";

     private static final int MENU_SYNC_NOW_ID = Menu.FIRST;
     private static final int MENU_SYNC_CANCEL_ID    = Menu.FIRST + 1;

     private static final int REQUEST_SHOW_SYNC_SETTINGS = 1;

     private String[] mAuthorities;
     private TextView mErrorInfoView;

     // If an account type is set, then show only accounts of that type
     private String mAccountType;
     // Temporary hack, to deal with backward compatibility
     // mFirstAccount is used for the injected preferences
     private Account mFirstAccount;

     @Override
     protected int getMetricsCategory() {
         return MetricsLogger.ACCOUNTS_MANAGE_ACCOUNTS;
     }

     @Override
     public void onCreate(Bundle icicle) {
         super.onCreate(icicle);

         Bundle args = getArguments();
         if (args != null && args.containsKey(KEY_ACCOUNT_TYPE)) {
             mAccountType = args.getString(KEY_ACCOUNT_TYPE);
         }
         addPreferencesFromResource(R.xml.manage_accounts_settings);
         setHasOptionsMenu(true);
     }

     @Override
     public void onResume() {
         super.onResume();
         mAuthenticatorHelper.listenToAccountUpdates();
         updateAuthDescriptions();
         showAccountsIfNeeded();
         showSyncState();
     }

     @Override
     public View onCreateView(LayoutInflater inflater, ViewGroup container,
             Bundle savedInstanceState) {
         final View view = inflater.inflate(R.layout.manage_accounts_screen, container, false);
         final ListView list = (ListView) view.findViewById(android.R.id.list);
         Utils.prepareCustomPreferencesList(container, view, list, false);
         return view;
     }

     @Override
     public void onActivityCreated(Bundle savedInstanceState) {
         super.onActivityCreated(savedInstanceState);

         final Activity activity = getActivity();
         final View view = getView();

         mErrorInfoView = (TextView)view.findViewById(R.id.sync_settings_error_info);
         mErrorInfoView.setVisibility(View.GONE);

         mAuthorities = activity.getIntent().getStringArrayExtra(AUTHORITIES_FILTER_KEY);

         Bundle args = getArguments();
         if (args != null && args.containsKey(KEY_ACCOUNT_LABEL)) {
             getActivity().setTitle(args.getString(KEY_ACCOUNT_LABEL));
         }
     }

     @Override
     public void onPause() {
         super.onPause();
         mAuthenticatorHelper.stopListeningToAccountUpdates();
     }

     @Override
     public void onStop() {
         super.onStop();
         final Activity activity = getActivity();
         activity.getActionBar().setDisplayOptions(0, ActionBar.DISPLAY_SHOW_CUSTOM);
         activity.getActionBar().setCustomView(null);
     }

     @Override
     public boolean onPreferenceTreeClick(PreferenceScreen preferences, Preference preference) {
         if (preference instanceof AccountPreference) {
             startAccountSettings((AccountPreference) preference);
         } else {
             return false;
         }
         return true;
     }

     private void startAccountSettings(AccountPreference acctPref) {
         Bundle args = new Bundle();
         args.putParcelable(AccountSyncSettings.ACCOUNT_KEY, acctPref.getAccount());
         args.putParcelable(EXTRA_USER, mUserHandle);
         ((SettingsActivity) getActivity()).startPreferencePanel(
                 AccountSyncSettings.class.getCanonicalName(), args,
                 R.string.account_sync_settings_title, acctPref.getAccount().name,
                 this, REQUEST_SHOW_SYNC_SETTINGS);
     }

     @Override
     public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
         menu.add(0, MENU_SYNC_NOW_ID, 0, getString(R.string.sync_menu_sync_now))
                 .setIcon(R.drawable.ic_menu_refresh_holo_dark);
         menu.add(0, MENU_SYNC_CANCEL_ID, 0, getString(R.string.sync_menu_sync_cancel))
                 .setIcon(com.android.internal.R.drawable.ic_menu_close_clear_cancel);
         super.onCreateOptionsMenu(menu, inflater);
     }

     @Override
     public void onPrepareOptionsMenu(Menu menu) {
         super.onPrepareOptionsMenu(menu);
         boolean syncActive = !ContentResolver.getCurrentSyncsAsUser(
                 mUserHandle.getIdentifier()).isEmpty();
         menu.findItem(MENU_SYNC_NOW_ID).setVisible(!syncActive);
         menu.findItem(MENU_SYNC_CANCEL_ID).setVisible(syncActive);
     }

     @Override
     public boolean onOptionsItemSelected(MenuItem item) {
         switch (item.getItemId()) {
         case MENU_SYNC_NOW_ID:
             requestOrCancelSyncForAccounts(true);
             return true;
         case MENU_SYNC_CANCEL_ID:
             requestOrCancelSyncForAccounts(false);
             return true;
         }
         return super.onOptionsItemSelected(item);
     }

     private void requestOrCancelSyncForAccounts(boolean sync) {
         final int userId = mUserHandle.getIdentifier();
         SyncAdapterType[] syncAdapters = ContentResolver.getSyncAdapterTypesAsUser(userId);
         Bundle extras = new Bundle();
         extras.putBoolean(ContentResolver.SYNC_EXTRAS_MANUAL, true);
         int count = getPreferenceScreen().getPreferenceCount();
         // For each account
         for (int i = 0; i < count; i++) {
             Preference pref = getPreferenceScreen().getPreference(i);
             if (pref instanceof AccountPreference) {
                 Account account = ((AccountPreference) pref).getAccount();
                 // For all available sync authorities, sync those that are enabled for the account
                 for (int j = 0; j < syncAdapters.length; j++) {
                     SyncAdapterType sa = syncAdapters[j];
                     if (syncAdapters[j].accountType.equals(mAccountType)
                             && ContentResolver.getSyncAutomaticallyAsUser(account, sa.authority,
                                     userId)) {
                         if (sync) {
                             ContentResolver.requestSyncAsUser(account, sa.authority, userId,
                                     extras);
                         } else {
                             ContentResolver.cancelSyncAsUser(account, sa.authority, userId);
                         }
                     }
                 }
             }
         }
     }

     @Override
     protected void onSyncStateUpdated() {
         showSyncState();
         // Catch any delayed delivery of update messages
         final Activity activity = getActivity();
         if (activity != null) {
             activity.invalidateOptionsMenu();
         }
     }

     /**
      * Shows the sync state of the accounts. Note: it must be called after the accounts have been
      * loaded, @see #showAccountsIfNeeded().
      */
     private void showSyncState() {
         // Catch any delayed delivery of update messages
         if (getActivity() == null || getActivity().isFinishing()) return;

         final int userId = mUserHandle.getIdentifier();

         // iterate over all the preferences, setting the state properly for each
         List<SyncInfo> currentSyncs = ContentResolver.getCurrentSyncsAsUser(userId);

         boolean anySyncFailed = false; // true if sync on any account failed
         Date date = new Date();

         // only track userfacing sync adapters when deciding if account is synced or not
         final SyncAdapterType[] syncAdapters = ContentResolver.getSyncAdapterTypesAsUser(userId);
         HashSet<String> userFacing = new HashSet<String>();
         for (int k = 0, n = syncAdapters.length; k < n; k++) {
             final SyncAdapterType sa = syncAdapters[k];
             if (sa.isUserVisible()) {
                 userFacing.add(sa.authority);
             }
         }
         for (int i = 0, count = getPreferenceScreen().getPreferenceCount(); i < count; i++) {
             Preference pref = getPreferenceScreen().getPreference(i);
             if (! (pref instanceof AccountPreference)) {
                 continue;
             }

             AccountPreference accountPref = (AccountPreference) pref;
             Account account = accountPref.getAccount();
             int syncCount = 0;
             long lastSuccessTime = 0;
             boolean syncIsFailing = false;
             final ArrayList<String> authorities = accountPref.getAuthorities();
             boolean syncingNow = false;
             if (authorities != null) {
                 for (String authority : authorities) {
                     SyncStatusInfo status = ContentResolver.getSyncStatusAsUser(account, authority,
                             userId);
                     boolean syncEnabled = isSyncEnabled(userId, account, authority);
                     boolean authorityIsPending = ContentResolver.isSyncPending(account, authority);
                     boolean activelySyncing = isSyncing(currentSyncs, account, authority);
                     boolean lastSyncFailed = status != null
                             && syncEnabled
                             && status.lastFailureTime != 0
                             && status.getLastFailureMesgAsInt(0)
                                != ContentResolver.SYNC_ERROR_SYNC_ALREADY_IN_PROGRESS;
                     if (lastSyncFailed && !activelySyncing && !authorityIsPending) {
                         syncIsFailing = true;
                         anySyncFailed = true;
                     }
                     syncingNow |= activelySyncing;
                     if (status != null && lastSuccessTime < status.lastSuccessTime) {
                         lastSuccessTime = status.lastSuccessTime;
                     }
                     syncCount += syncEnabled && userFacing.contains(authority) ? 1 : 0;
                 }
             } else {
                 if (Log.isLoggable(TAG, Log.VERBOSE)) {
                     Log.v(TAG, "no syncadapters found for " + account);
                 }
             }
             if (syncIsFailing) {
                 accountPref.setSyncStatus(AccountPreference.SYNC_ERROR, true);
             } else if (syncCount == 0) {
                 accountPref.setSyncStatus(AccountPreference.SYNC_DISABLED, true);
             } else if (syncCount > 0) {
                 if (syncingNow) {
                     accountPref.setSyncStatus(AccountPreference.SYNC_IN_PROGRESS, true);
                 } else {
                     accountPref.setSyncStatus(AccountPreference.SYNC_ENABLED, true);
                     if (lastSuccessTime > 0) {
                         accountPref.setSyncStatus(AccountPreference.SYNC_ENABLED, false);
                         date.setTime(lastSuccessTime);
                         final String timeString = formatSyncDate(date);
                         accountPref.setSummary(getResources().getString(
                                 R.string.last_synced, timeString));
                     }
                 }
             } else {
                 accountPref.setSyncStatus(AccountPreference.SYNC_DISABLED, true);
             }
         }

         mErrorInfoView.setVisibility(anySyncFailed ? View.VISIBLE : View.GONE);
     }


     private boolean isSyncing(List<SyncInfo> currentSyncs, Account account, String authority) {
         final int count = currentSyncs.size();
         for (int i = 0; i < count;  i++) {
             SyncInfo syncInfo = currentSyncs.get(i);
             if (syncInfo.account.equals(account) && syncInfo.authority.equals(authority)) {
                 return true;
             }
         }
         return false;
     }

     private boolean isSyncEnabled(int userId, Account account, String authority) {
         return ContentResolver.getSyncAutomaticallyAsUser(account, authority, userId)
                 && ContentResolver.getMasterSyncAutomaticallyAsUser(userId)
                 && (ContentResolver.getIsSyncableAsUser(account, authority, userId) > 0);
     }

     @Override
     public void onAccountsUpdate(UserHandle userHandle) {
         showAccountsIfNeeded();
         onSyncStateUpdated();
     }

     private void showAccountsIfNeeded() {
         if (getActivity() == null) return;
         Account[] accounts = AccountManager.get(getActivity()).getAccountsAsUser(
                 mUserHandle.getIdentifier());
         getPreferenceScreen().removeAll();
         mFirstAccount = null;
         addPreferencesFromResource(R.xml.manage_accounts_settings);
         for (int i = 0, n = accounts.length; i < n; i++) {
             final Account account = accounts[i];
             // If an account type is specified for this screen, skip other types
             if (mAccountType != null && !account.type.equals(mAccountType)) continue;
             final ArrayList<String> auths = getAuthoritiesForAccountType(account.type);

             boolean showAccount = true;
             if (mAuthorities != null && auths != null) {
                 showAccount = false;
                 for (String requestedAuthority : mAuthorities) {
                     if (auths.contains(requestedAuthority)) {
                         showAccount = true;
                         break;
                     }
                 }
             }

             if (showAccount) {
                 final Drawable icon = getDrawableForType(account.type);
                 final AccountPreference preference =
                         new AccountPreference(getActivity(), account, icon, auths, false);
                 getPreferenceScreen().addPreference(preference);
                 if (mFirstAccount == null) {
                     mFirstAccount = account;
                 }
             }
         }
         if (mAccountType != null && mFirstAccount != null) {
             addAuthenticatorSettings();
         } else {
             // There's no account, close activity
             finish();
         }
     }

     private void addAuthenticatorSettings() {
         PreferenceScreen prefs = addPreferencesForType(mAccountType, getPreferenceScreen());
         if (prefs != null) {
             updatePreferenceIntents(prefs);
         }
     }

     /** Listens to a preference click event and starts a fragment */
     private class FragmentStarter
             implements Preference.OnPreferenceClickListener {
         private final String mClass;
         private final int mTitleRes;

         /**
          * @param className the class name of the fragment to be started.
          * @param title the title resource id of the started preference panel.
          */
         public FragmentStarter(String className, int title) {
             mClass = className;
             mTitleRes = title;
         }

         @Override
         public boolean onPreferenceClick(Preference preference) {
             ((SettingsActivity) getActivity()).startPreferencePanel(
                     mClass, null, mTitleRes, null, null, 0);
             // Hack: announce that the Google account preferences page is launching the location
             // settings
             if (mClass.equals(LocationSettings.class.getName())) {
                 Intent intent = new Intent(LAUNCHING_LOCATION_SETTINGS);
                 getActivity().sendBroadcast(
                         intent, android.Manifest.permission.WRITE_SECURE_SETTINGS);
             }
             return true;
         }
     }

     /**
      * Filters through the preference list provided by GoogleLoginService.
      *
      * This method removes all the invalid intent from the list, adds account name as extra into the
      * intent, and hack the location settings to start it as a fragment.
      */
     private void updatePreferenceIntents(PreferenceScreen prefs) {
         final PackageManager pm = getActivity().getPackageManager();
         for (int i = 0; i < prefs.getPreferenceCount();) {
             Preference pref = prefs.getPreference(i);
             Intent intent = pref.getIntent();
             if (intent != null) {
                 // Hack. Launch "Location" as fragment instead of as activity.
                 //
                 // When "Location" is launched as activity via Intent, there's no "Up" button at the
                 // top left, and if there's another running instance of "Location" activity, the
                 // back stack would usually point to some other place so the user won't be able to
                 // go back to the previous page by "back" key. Using fragment is a much easier
                 // solution to those problems.
                 //
                 // If we set Intent to null and assign a fragment to the PreferenceScreen item here,
                 // in order to make it work as expected, we still need to modify the container
                 // PreferenceActivity, override onPreferenceStartFragment() and call
                 // startPreferencePanel() there. In order to inject the title string there, more
                 // dirty further hack is still needed. It's much easier and cleaner to listen to
                 // preference click event here directly.
                 if (intent.getAction().equals(
                         android.provider.Settings.ACTION_LOCATION_SOURCE_SETTINGS)) {
                     // The OnPreferenceClickListener overrides the click event completely. No intent
                     // will get fired.
                     pref.setOnPreferenceClickListener(new FragmentStarter(
                             LocationSettings.class.getName(),
                             R.string.location_settings_title));
                 } else {
                     ResolveInfo ri = pm.resolveActivityAsUser(intent,
                             PackageManager.MATCH_DEFAULT_ONLY, mUserHandle.getIdentifier());
                     if (ri == null) {
                         prefs.removePreference(pref);
                         continue;
                     } else {
                         intent.putExtra(ACCOUNT_KEY, mFirstAccount);
                         intent.setFlags(intent.getFlags() | Intent.FLAG_ACTIVITY_NEW_TASK);
                         pref.setOnPreferenceClickListener(new OnPreferenceClickListener() {
                             @Override
                             public boolean onPreferenceClick(Preference preference) {
                                 Intent prefIntent = preference.getIntent();
                                 /*
                                  * Check the intent to see if it resolves to a exported=false
                                  * activity that doesn't share a uid with the authenticator.
                                  *
                                  * Otherwise the intent is considered unsafe in that it will be
                                  * exploiting the fact that settings has system privileges.
                                  */
                                 if (isSafeIntent(pm, prefIntent)) {
                                     getActivity().startActivityAsUser(prefIntent, mUserHandle);
                                 } else {
                                     Log.e(TAG,
                                             "Refusing to launch authenticator intent because"
                                             + "it exploits Settings permissions: "
                                             + prefIntent);
                                 }
                                 return true;
                             }
                         });
                     }
                 }
             }
             i++;
         }
     }

     /**
      * Determines if the supplied Intent is safe. A safe intent is one that is
      * will launch a exported=true activity or owned by the same uid as the
      * authenticator supplying the intent.
      */
     private boolean isSafeIntent(PackageManager pm, Intent intent) {
         AuthenticatorDescription authDesc =
                 mAuthenticatorHelper.getAccountTypeDescription(mAccountType);
         ResolveInfo resolveInfo = pm.resolveActivity(intent, 0);
         if (resolveInfo == null) {
             return false;
         }
         ActivityInfo resolvedActivityInfo = resolveInfo.activityInfo;
         ApplicationInfo resolvedAppInfo = resolvedActivityInfo.applicationInfo;
         try {
             ApplicationInfo authenticatorAppInf = pm.getApplicationInfo(authDesc.packageName, 0);
             return resolvedActivityInfo.exported
                     || resolvedAppInfo.uid == authenticatorAppInf.uid;
         } catch (NameNotFoundException e) {
             Log.e(TAG,
                     "Intent considered unsafe due to exception.",
                     e);
             return false;
         }
     }

     @Override
     protected void onAuthDescriptionsUpdated() {
         // Update account icons for all account preference items
         for (int i = 0; i < getPreferenceScreen().getPreferenceCount(); i++) {
             Preference pref = getPreferenceScreen().getPreference(i);
             if (pref instanceof AccountPreference) {
                 AccountPreference accPref = (AccountPreference) pref;
                 accPref.setSummary(getLabelForType(accPref.getAccount().type));
             }
         }
     }
 }
	/*
	* Copyright (C) 2008 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.accounts;

	import android.accounts.Account;
	import android.accounts.AccountManager;
	import android.accounts.AuthenticatorDescription;
	import android.app.ActionBar;
	import android.app.Activity;
	import android.content.ContentResolver;
	import android.content.Intent;
	import android.content.SyncAdapterType;
	import android.content.SyncInfo;
	import android.content.SyncStatusInfo;
	import android.content.pm.ActivityInfo;
	import android.content.pm.ApplicationInfo;
	import android.content.pm.PackageManager;
	import android.content.pm.PackageManager.NameNotFoundException;
	import android.content.pm.ResolveInfo;
	import android.graphics.drawable.Drawable;
	import android.os.Bundle;
	import android.os.UserHandle;
	import android.preference.Preference;
	import android.preference.Preference.OnPreferenceClickListener;
	import android.preference.PreferenceScreen;
	import android.util.Log;
	import android.view.LayoutInflater;
	import android.view.Menu;
	import android.view.MenuInflater;
	import android.view.MenuItem;
	import android.view.View;
	import android.view.ViewGroup;
	import android.widget.ListView;
	import android.widget.TextView;

	import com.android.internal.logging.MetricsLogger;
	import com.android.settings.AccountPreference;
	import com.android.settings.R;
	import com.android.settings.SettingsActivity;
	import com.android.settings.Utils;
	import com.android.settings.location.LocationSettings;

	import java.util.ArrayList;
	import java.util.Date;
	import java.util.HashSet;
	import java.util.List;

	import static android.content.Intent.EXTRA_USER;

	/** Manages settings for Google Account. */
	public class ManageAccountsSettings extends AccountPreferenceBase
	implements AuthenticatorHelper.OnAccountsUpdateListener {
	private static final String ACCOUNT_KEY = "account"; // to pass to auth settings
	public static final String KEY_ACCOUNT_TYPE = "account_type";
	public static final String KEY_ACCOUNT_LABEL = "account_label";

	// Action name for the broadcast intent when the Google account preferences page is launching
	// the location settings.
	private static final String LAUNCHING_LOCATION_SETTINGS =
	"com.android.settings.accounts.LAUNCHING_LOCATION_SETTINGS";

	private static final int MENU_SYNC_NOW_ID = Menu.FIRST;
	private static final int MENU_SYNC_CANCEL_ID = Menu.FIRST + 1;

	private static final int REQUEST_SHOW_SYNC_SETTINGS = 1;

	private String[] mAuthorities;
	private TextView mErrorInfoView;

	// If an account type is set, then show only accounts of that type
	private String mAccountType;
	// Temporary hack, to deal with backward compatibility
	// mFirstAccount is used for the injected preferences
	private Account mFirstAccount;

	@Override
	protected int getMetricsCategory() {
	return MetricsLogger.ACCOUNTS_MANAGE_ACCOUNTS;
	}

	@Override
	public void onCreate(Bundle icicle) {
	super.onCreate(icicle);

	Bundle args = getArguments();
	if (args != null && args.containsKey(KEY_ACCOUNT_TYPE)) {
	mAccountType = args.getString(KEY_ACCOUNT_TYPE);
	}
	addPreferencesFromResource(R.xml.manage_accounts_settings);
	setHasOptionsMenu(true);
	}

	@Override
	public void onResume() {
	super.onResume();
	mAuthenticatorHelper.listenToAccountUpdates();
	updateAuthDescriptions();
	showAccountsIfNeeded();
	showSyncState();
	}

	@Override
	public View onCreateView(LayoutInflater inflater, ViewGroup container,
	Bundle savedInstanceState) {
	final View view = inflater.inflate(R.layout.manage_accounts_screen, container, false);
	final ListView list = (ListView) view.findViewById(android.R.id.list);
	Utils.prepareCustomPreferencesList(container, view, list, false);
	return view;
	}

	@Override
	public void onActivityCreated(Bundle savedInstanceState) {
	super.onActivityCreated(savedInstanceState);

	final Activity activity = getActivity();
	final View view = getView();

	mErrorInfoView = (TextView)view.findViewById(R.id.sync_settings_error_info);
	mErrorInfoView.setVisibility(View.GONE);

	mAuthorities = activity.getIntent().getStringArrayExtra(AUTHORITIES_FILTER_KEY);

	Bundle args = getArguments();
	if (args != null && args.containsKey(KEY_ACCOUNT_LABEL)) {
	getActivity().setTitle(args.getString(KEY_ACCOUNT_LABEL));
	}
	}

	@Override
	public void onPause() {
	super.onPause();
	mAuthenticatorHelper.stopListeningToAccountUpdates();
	}

	@Override
	public void onStop() {
	super.onStop();
	final Activity activity = getActivity();
	activity.getActionBar().setDisplayOptions(0, ActionBar.DISPLAY_SHOW_CUSTOM);
	activity.getActionBar().setCustomView(null);
	}

	@Override
	public boolean onPreferenceTreeClick(PreferenceScreen preferences, Preference preference) {
	if (preference instanceof AccountPreference) {
	startAccountSettings((AccountPreference) preference);
	} else {
	return false;
	}
	return true;
	}

	private void startAccountSettings(AccountPreference acctPref) {
	Bundle args = new Bundle();
	args.putParcelable(AccountSyncSettings.ACCOUNT_KEY, acctPref.getAccount());
	args.putParcelable(EXTRA_USER, mUserHandle);
	((SettingsActivity) getActivity()).startPreferencePanel(
	AccountSyncSettings.class.getCanonicalName(), args,
	R.string.account_sync_settings_title, acctPref.getAccount().name,
	this, REQUEST_SHOW_SYNC_SETTINGS);
	}

	@Override
	public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
	menu.add(0, MENU_SYNC_NOW_ID, 0, getString(R.string.sync_menu_sync_now))
	.setIcon(R.drawable.ic_menu_refresh_holo_dark);
	menu.add(0, MENU_SYNC_CANCEL_ID, 0, getString(R.string.sync_menu_sync_cancel))
	.setIcon(com.android.internal.R.drawable.ic_menu_close_clear_cancel);
	super.onCreateOptionsMenu(menu, inflater);
	}

	@Override
	public void onPrepareOptionsMenu(Menu menu) {
	super.onPrepareOptionsMenu(menu);
	boolean syncActive = !ContentResolver.getCurrentSyncsAsUser(
	mUserHandle.getIdentifier()).isEmpty();
	menu.findItem(MENU_SYNC_NOW_ID).setVisible(!syncActive);
	menu.findItem(MENU_SYNC_CANCEL_ID).setVisible(syncActive);
	}

	@Override
	public boolean onOptionsItemSelected(MenuItem item) {
	switch (item.getItemId()) {
	case MENU_SYNC_NOW_ID:
	requestOrCancelSyncForAccounts(true);
	return true;
	case MENU_SYNC_CANCEL_ID:
	requestOrCancelSyncForAccounts(false);
	return true;
	}
	return super.onOptionsItemSelected(item);
	}

	private void requestOrCancelSyncForAccounts(boolean sync) {
	final int userId = mUserHandle.getIdentifier();
	SyncAdapterType[] syncAdapters = ContentResolver.getSyncAdapterTypesAsUser(userId);
	Bundle extras = new Bundle();
	extras.putBoolean(ContentResolver.SYNC_EXTRAS_MANUAL, true);
	int count = getPreferenceScreen().getPreferenceCount();
	// For each account
	for (int i = 0; i < count; i++) {
	Preference pref = getPreferenceScreen().getPreference(i);
	if (pref instanceof AccountPreference) {
	Account account = ((AccountPreference) pref).getAccount();
	// For all available sync authorities, sync those that are enabled for the account
	for (int j = 0; j < syncAdapters.length; j++) {
	SyncAdapterType sa = syncAdapters[j];
	if (syncAdapters[j].accountType.equals(mAccountType)
	&& ContentResolver.getSyncAutomaticallyAsUser(account, sa.authority,
	userId)) {
	if (sync) {
	ContentResolver.requestSyncAsUser(account, sa.authority, userId,
	extras);
	} else {
	ContentResolver.cancelSyncAsUser(account, sa.authority, userId);
	}
	}
	}
	}
	}
	}

	@Override
	protected void onSyncStateUpdated() {
	showSyncState();
	// Catch any delayed delivery of update messages
	final Activity activity = getActivity();
	if (activity != null) {
	activity.invalidateOptionsMenu();
	}
	}

	/**
	* Shows the sync state of the accounts. Note: it must be called after the accounts have been
	* loaded, @see #showAccountsIfNeeded().
	*/
	private void showSyncState() {
	// Catch any delayed delivery of update messages
	if (getActivity() == null \|\| getActivity().isFinishing()) return;

	final int userId = mUserHandle.getIdentifier();

	// iterate over all the preferences, setting the state properly for each
	List<SyncInfo> currentSyncs = ContentResolver.getCurrentSyncsAsUser(userId);

	boolean anySyncFailed = false; // true if sync on any account failed
	Date date = new Date();

	// only track userfacing sync adapters when deciding if account is synced or not
	final SyncAdapterType[] syncAdapters = ContentResolver.getSyncAdapterTypesAsUser(userId);
	HashSet<String> userFacing = new HashSet<String>();
	for (int k = 0, n = syncAdapters.length; k < n; k++) {
	final SyncAdapterType sa = syncAdapters[k];
	if (sa.isUserVisible()) {
	userFacing.add(sa.authority);
	}
	}
	for (int i = 0, count = getPreferenceScreen().getPreferenceCount(); i < count; i++) {
	Preference pref = getPreferenceScreen().getPreference(i);
	if (! (pref instanceof AccountPreference)) {
	continue;
	}

	AccountPreference accountPref = (AccountPreference) pref;
	Account account = accountPref.getAccount();
	int syncCount = 0;
	long lastSuccessTime = 0;
	boolean syncIsFailing = false;
	final ArrayList<String> authorities = accountPref.getAuthorities();
	boolean syncingNow = false;
	if (authorities != null) {
	for (String authority : authorities) {
	SyncStatusInfo status = ContentResolver.getSyncStatusAsUser(account, authority,
	userId);
	boolean syncEnabled = isSyncEnabled(userId, account, authority);
	boolean authorityIsPending = ContentResolver.isSyncPending(account, authority);
	boolean activelySyncing = isSyncing(currentSyncs, account, authority);
	boolean lastSyncFailed = status != null
	&& syncEnabled
	&& status.lastFailureTime != 0
	&& status.getLastFailureMesgAsInt(0)
	!= ContentResolver.SYNC_ERROR_SYNC_ALREADY_IN_PROGRESS;
	if (lastSyncFailed && !activelySyncing && !authorityIsPending) {
	syncIsFailing = true;
	anySyncFailed = true;
	}
	syncingNow \|= activelySyncing;
	if (status != null && lastSuccessTime < status.lastSuccessTime) {
	lastSuccessTime = status.lastSuccessTime;
	}
	syncCount += syncEnabled && userFacing.contains(authority) ? 1 : 0;
	}
	} else {
	if (Log.isLoggable(TAG, Log.VERBOSE)) {
	Log.v(TAG, "no syncadapters found for " + account);
	}
	}
	if (syncIsFailing) {
	accountPref.setSyncStatus(AccountPreference.SYNC_ERROR, true);
	} else if (syncCount == 0) {
	accountPref.setSyncStatus(AccountPreference.SYNC_DISABLED, true);
	} else if (syncCount > 0) {
	if (syncingNow) {
	accountPref.setSyncStatus(AccountPreference.SYNC_IN_PROGRESS, true);
	} else {
	accountPref.setSyncStatus(AccountPreference.SYNC_ENABLED, true);
	if (lastSuccessTime > 0) {
	accountPref.setSyncStatus(AccountPreference.SYNC_ENABLED, false);
	date.setTime(lastSuccessTime);
	final String timeString = formatSyncDate(date);
	accountPref.setSummary(getResources().getString(
	R.string.last_synced, timeString));
	}
	}
	} else {
	accountPref.setSyncStatus(AccountPreference.SYNC_DISABLED, true);
	}
	}

	mErrorInfoView.setVisibility(anySyncFailed ? View.VISIBLE : View.GONE);
	}


	private boolean isSyncing(List<SyncInfo> currentSyncs, Account account, String authority) {
	final int count = currentSyncs.size();
	for (int i = 0; i < count; i++) {
	SyncInfo syncInfo = currentSyncs.get(i);
	if (syncInfo.account.equals(account) && syncInfo.authority.equals(authority)) {
	return true;
	}
	}
	return false;
	}

	private boolean isSyncEnabled(int userId, Account account, String authority) {
	return ContentResolver.getSyncAutomaticallyAsUser(account, authority, userId)
	&& ContentResolver.getMasterSyncAutomaticallyAsUser(userId)
	&& (ContentResolver.getIsSyncableAsUser(account, authority, userId) > 0);
	}

	@Override
	public void onAccountsUpdate(UserHandle userHandle) {
	showAccountsIfNeeded();
	onSyncStateUpdated();
	}

	private void showAccountsIfNeeded() {
	if (getActivity() == null) return;
	Account[] accounts = AccountManager.get(getActivity()).getAccountsAsUser(
	mUserHandle.getIdentifier());
	getPreferenceScreen().removeAll();
	mFirstAccount = null;
	addPreferencesFromResource(R.xml.manage_accounts_settings);
	for (int i = 0, n = accounts.length; i < n; i++) {
	final Account account = accounts[i];
	// If an account type is specified for this screen, skip other types
	if (mAccountType != null && !account.type.equals(mAccountType)) continue;
	final ArrayList<String> auths = getAuthoritiesForAccountType(account.type);

	boolean showAccount = true;
	if (mAuthorities != null && auths != null) {
	showAccount = false;
	for (String requestedAuthority : mAuthorities) {
	if (auths.contains(requestedAuthority)) {
	showAccount = true;
	break;
	}
	}
	}

	if (showAccount) {
	final Drawable icon = getDrawableForType(account.type);
	final AccountPreference preference =
	new AccountPreference(getActivity(), account, icon, auths, false);
	getPreferenceScreen().addPreference(preference);
	if (mFirstAccount == null) {
	mFirstAccount = account;
	}
	}
	}
	if (mAccountType != null && mFirstAccount != null) {
	addAuthenticatorSettings();
	} else {
	// There's no account, close activity
	finish();
	}
	}

	private void addAuthenticatorSettings() {
	PreferenceScreen prefs = addPreferencesForType(mAccountType, getPreferenceScreen());
	if (prefs != null) {
	updatePreferenceIntents(prefs);
	}
	}

	/** Listens to a preference click event and starts a fragment */
	private class FragmentStarter
	implements Preference.OnPreferenceClickListener {
	private final String mClass;
	private final int mTitleRes;

	/**
	* @param className the class name of the fragment to be started.
	* @param title the title resource id of the started preference panel.
	*/
	public FragmentStarter(String className, int title) {
	mClass = className;
	mTitleRes = title;
	}

	@Override
	public boolean onPreferenceClick(Preference preference) {
	((SettingsActivity) getActivity()).startPreferencePanel(
	mClass, null, mTitleRes, null, null, 0);
	// Hack: announce that the Google account preferences page is launching the location
	// settings
	if (mClass.equals(LocationSettings.class.getName())) {
	Intent intent = new Intent(LAUNCHING_LOCATION_SETTINGS);
	getActivity().sendBroadcast(
	intent, android.Manifest.permission.WRITE_SECURE_SETTINGS);
	}
	return true;
	}
	}

	/**
	* Filters through the preference list provided by GoogleLoginService.
	*
	* This method removes all the invalid intent from the list, adds account name as extra into the
	* intent, and hack the location settings to start it as a fragment.
	*/
	private void updatePreferenceIntents(PreferenceScreen prefs) {
	final PackageManager pm = getActivity().getPackageManager();
	for (int i = 0; i < prefs.getPreferenceCount();) {
	Preference pref = prefs.getPreference(i);
	Intent intent = pref.getIntent();
	if (intent != null) {
	// Hack. Launch "Location" as fragment instead of as activity.
	//
	// When "Location" is launched as activity via Intent, there's no "Up" button at the
	// top left, and if there's another running instance of "Location" activity, the
	// back stack would usually point to some other place so the user won't be able to
	// go back to the previous page by "back" key. Using fragment is a much easier
	// solution to those problems.
	//
	// If we set Intent to null and assign a fragment to the PreferenceScreen item here,
	// in order to make it work as expected, we still need to modify the container
	// PreferenceActivity, override onPreferenceStartFragment() and call
	// startPreferencePanel() there. In order to inject the title string there, more
	// dirty further hack is still needed. It's much easier and cleaner to listen to
	// preference click event here directly.
	if (intent.getAction().equals(
	android.provider.Settings.ACTION_LOCATION_SOURCE_SETTINGS)) {
	// The OnPreferenceClickListener overrides the click event completely. No intent
	// will get fired.
	pref.setOnPreferenceClickListener(new FragmentStarter(
	LocationSettings.class.getName(),
	R.string.location_settings_title));
	} else {
	ResolveInfo ri = pm.resolveActivityAsUser(intent,
	PackageManager.MATCH_DEFAULT_ONLY, mUserHandle.getIdentifier());
	if (ri == null) {
	prefs.removePreference(pref);
	continue;
	} else {
	intent.putExtra(ACCOUNT_KEY, mFirstAccount);
	intent.setFlags(intent.getFlags() \| Intent.FLAG_ACTIVITY_NEW_TASK);
	pref.setOnPreferenceClickListener(new OnPreferenceClickListener() {
	@Override
	public boolean onPreferenceClick(Preference preference) {
	Intent prefIntent = preference.getIntent();
	/*
	* Check the intent to see if it resolves to a exported=false
	* activity that doesn't share a uid with the authenticator.
	*
	* Otherwise the intent is considered unsafe in that it will be
	* exploiting the fact that settings has system privileges.
	*/
	if (isSafeIntent(pm, prefIntent)) {
	getActivity().startActivityAsUser(prefIntent, mUserHandle);
	} else {
	Log.e(TAG,
	"Refusing to launch authenticator intent because"
	+ "it exploits Settings permissions: "
	+ prefIntent);
	}
	return true;
	}
	});
	}
	}
	}
	i++;
	}
	}

	/**
	* Determines if the supplied Intent is safe. A safe intent is one that is
	* will launch a exported=true activity or owned by the same uid as the
	* authenticator supplying the intent.
	*/
	private boolean isSafeIntent(PackageManager pm, Intent intent) {
	AuthenticatorDescription authDesc =
	mAuthenticatorHelper.getAccountTypeDescription(mAccountType);
	ResolveInfo resolveInfo = pm.resolveActivity(intent, 0);
	if (resolveInfo == null) {
	return false;
	}
	ActivityInfo resolvedActivityInfo = resolveInfo.activityInfo;
	ApplicationInfo resolvedAppInfo = resolvedActivityInfo.applicationInfo;
	try {
	ApplicationInfo authenticatorAppInf = pm.getApplicationInfo(authDesc.packageName, 0);
	return resolvedActivityInfo.exported
	\|\| resolvedAppInfo.uid == authenticatorAppInf.uid;
	} catch (NameNotFoundException e) {
	Log.e(TAG,
	"Intent considered unsafe due to exception.",
	e);
	return false;
	}
	}

	@Override
	protected void onAuthDescriptionsUpdated() {
	// Update account icons for all account preference items
	for (int i = 0; i < getPreferenceScreen().getPreferenceCount(); i++) {
	Preference pref = getPreferenceScreen().getPreference(i);
	if (pref instanceof AccountPreference) {
	AccountPreference accPref = (AccountPreference) pref;
	accPref.setSummary(getLabelForType(accPref.getAccount().type));
	}
	}
	}
	}