Caldavsync Sources: src/org/gege/caldavsyncadapter/syncadapter/SyncAdapter.java@fb9019fb1bf7 (annotated)

src/org/gege/caldavsyncadapter/syncadapter/SyncAdapter.java@fb9019fb1bf7 (annotated)

src/org/gege/caldavsyncadapter/syncadapter/SyncAdapter.java

Tue, 10 Feb 2015 18:12:00 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Tue, 10 Feb 2015 18:12:00 +0100
changeset 0: fb9019fb1bf7
child 8: ec8af0e3fbc2
permissions: -rw-r--r--

Import initial revisions of existing project AndroidCaldavSyncAdapater,
forked from upstream repository at 27e8a0f8495c92e0780d450bdf0c7cec77a03a55.

 /**
  * Copyright (c) 2012-2013, Gerald Garcia, David Wiesner, Timo Berger
  *
  * This file is part of Andoid Caldav Sync Adapter Free.
  *
  * Andoid Caldav Sync Adapter Free is free software: you can redistribute
  * it and/or modify it under the terms of the GNU General Public License
  * as published by the Free Software Foundation, either version 3 of the
  * License, or at your option any later version.
  *
  * Andoid Caldav Sync Adapter Free is distributed in the hope that
  * it will be useful, but WITHOUT ANY WARRANTY; without even the implied
  * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU General Public License for more details.
  *
  * You should have received a copy of the GNU General Public License
  * along with Andoid Caldav Sync Adapter Free.
  * If not, see <http://www.gnu.org/licenses/>.
  *
  */
 package org.gege.caldavsyncadapter.syncadapter;
 import java.io.IOException;
 import java.net.URI;
 //import java.net.MalformedURLException;
 import java.net.URISyntaxException;
 import java.util.ArrayList;
 //import java.security.GeneralSecurityException;
 import javax.xml.parsers.ParserConfigurationException;
 import net.fortuna.ical4j.data.ParserException;
 import org.apache.http.ParseException;
 import org.apache.http.client.ClientProtocolException;
 import org.gege.caldavsyncadapter.Event;
 import org.gege.caldavsyncadapter.android.entities.AndroidEvent;
 import org.gege.caldavsyncadapter.authenticator.AuthenticatorActivity;
 import org.gege.caldavsyncadapter.caldav.CaldavFacade;
 import org.gege.caldavsyncadapter.caldav.CaldavProtocolException;
 import org.gege.caldavsyncadapter.caldav.entities.DavCalendar;
 import org.gege.caldavsyncadapter.caldav.entities.CalendarEvent;
 import org.gege.caldavsyncadapter.caldav.entities.CalendarList;
 import org.gege.caldavsyncadapter.caldav.entities.DavCalendar.CalendarSource;
 import org.gege.caldavsyncadapter.syncadapter.notifications.NotificationsHelper;
 import org.xml.sax.SAXException;
 import android.accounts.Account;
 import android.accounts.AccountManager;
 import android.content.AbstractThreadedSyncAdapter;
 import android.content.ContentProviderClient;
 import android.content.ContentUris;
 import android.content.ContentValues;
 import android.content.Context;
 import android.content.SyncResult;
 import android.content.SyncStats;
 import android.content.pm.PackageManager.NameNotFoundException;
 import android.database.Cursor;
 import android.net.Uri;
 import android.os.Bundle;
 import android.os.RemoteException;
 import android.provider.CalendarContract.Attendees;
 import android.provider.CalendarContract.Calendars;
 import android.provider.CalendarContract.Events;
 import android.provider.CalendarContract.Reminders;
 import android.util.Log;
 public class SyncAdapter extends AbstractThreadedSyncAdapter {
 	private static final String TAG = "SyncAdapter";
 	private AccountManager mAccountManager;
 	private String mVersion = "";
 	private int mCountPerformSync = 0;
 	private int mCountSyncCanceled = 0;
 	private int mCountProviderFailed = 0;
 	private int mCountProviderFailedMax = 3;
 //	private Context mContext;
 /*	private static final String[] CALENDAR_PROJECTION = new String[] {
 	    Calendars._ID,                           // 0
 	    Calendars.ACCOUNT_NAME,                  // 1
 	    Calendars.CALENDAR_DISPLAY_NAME,         // 2
 	    Calendars.OWNER_ACCOUNT,                 // 3
 	    Calendar.CTAG                            // 4
 	};*/
 /*	// The indices for the projection array above.
 	private static final int PROJECTION_ID_INDEX = 0;
 	private static final int PROJECTION_ACCOUNT_NAME_INDEX = 1;
 	private static final int PROJECTION_DISPLAY_NAME_INDEX = 2;
 	private static final int PROJECTION_OWNER_ACCOUNT_INDEX = 3;
 */
 /*
 	private static final String[] EVENT_PROJECTION = new String[] {
 		Events._ID,
 		Events._SYNC_ID,
 		Events.SYNC_DATA1,
 		Events.CALENDAR_ID
 	};
 */
 	// ignore same CTag
 	//private static final boolean FORCE_SYNCHRONIZE = false;
 	// drop all calendar before synchro
 	//private static final boolean DROP_CALENDAR_EVENTS = false;
 	public SyncAdapter(Context context, boolean autoInitialize) {
 		super(context, autoInitialize);
 		//android.os.Debug.waitForDebugger();
 		mAccountManager = AccountManager.get(context);
 		try {
 			mVersion = context.getPackageManager().getPackageInfo(context.getPackageName(), 0).versionName;
 		} catch (NameNotFoundException e) {
 			e.printStackTrace();
 		}
 //		mContext = context;
 	}
 	@Override
 	public void onPerformSync(Account account, Bundle extras, String authority,
 			ContentProviderClient provider, SyncResult syncResult) {
 		boolean bolError = false;
 		String url = mAccountManager.getUserData(account, AuthenticatorActivity.USER_DATA_URL_KEY);
 		this.mCountPerformSync += 1;
 		Log.v(TAG, "onPerformSync() count:" + String.valueOf(this.mCountPerformSync) + " on " + account.name + " with URL " + url);
 		CalendarList serverCalList;
 		CalendarList androidCalList = new CalendarList(account, provider, CalendarSource.Android, url);
 		androidCalList.readCalendarFromClient();
 		ArrayList<Uri> notifyList = new ArrayList<Uri>();
 		try {
  			String Username = "";
 			String UserDataVersion = mAccountManager.getUserData(account, AuthenticatorActivity.USER_DATA_VERSION);
 			if (UserDataVersion == null) {
 				Username = account.name;
 			} else {
 				Username = mAccountManager.getUserData(account, AuthenticatorActivity.USER_DATA_USERNAME);
 			}
 			CaldavFacade facade = new CaldavFacade(Username, mAccountManager.getPassword(account), url);
 			facade.setAccount(account);
 			facade.setProvider(provider);
 			facade.setVersion(mVersion);
 			serverCalList = facade.getCalendarList(this.getContext());
 			//String davProperties = facade.getLastDav();
 			Log.i(TAG, String.valueOf(androidCalList.getCalendarList().size()) + " calendars found at android");
 			for (DavCalendar serverCalendar : serverCalList.getCalendarList()) {
 				Log.i(TAG, "Detected calendar name=" + serverCalendar.getCalendarDisplayName() + " URI=" + serverCalendar.getURI());
 				Uri androidCalendarUri = serverCalendar.checkAndroidCalendarList(androidCalList, this.getContext());
 				// check if the adapter was able to get an existing calendar or create a new one
 				if (androidCalendarUri != null) {
 					// the provider seems to work correct, reset the counter
 					mCountProviderFailed = 0;
 					DavCalendar androidCalendar = androidCalList.getCalendarByAndroidUri(androidCalendarUri);
 					//if ((FORCE_SYNCHRONIZE) || (androidCalendar.getcTag() == null) || (!androidCalendar.getcTag().equals(serverCalendar.getcTag()))) {
 					if ((androidCalendar.getcTag() == null) || (!androidCalendar.getcTag().equals(serverCalendar.getcTag()))) {
 							Log.d(TAG, "CTag has changed, something to synchronise");
 							if (serverCalendar.readCalendarEvents(facade)) {
 								this.synchroniseEvents(androidCalendar, serverCalendar, syncResult.stats, notifyList);
 								Log.d(TAG, "Updating stored CTag");
 								//serverCalendar.updateAndroidCalendar(androidCalendarUri, Calendar.CTAG, serverCalendar.getcTag());
 								androidCalendar.setCTag(serverCalendar.getcTag(), true);
 							} else {
 								Log.d(TAG, "unable to read events from server calendar");
 							}
 					} else {
 						Log.d(TAG, "CTag has not changed, nothing to do");
 						/* this is unnecessary. "SkippedEntries" are:
 						 * Counter for tracking how many entries, either from the server or the local store,
 						 * were ignored during the sync operation. This could happen if the SyncAdapter detected
 						 * some unparsable data but decided to skip it and move on rather than failing immediately.
 						 */
 						/*long CalendarID = ContentUris.parseId(androidCalendarUri);
 						String selection = "(" + Events.CALENDAR_ID + " = ?)";
 						String[] selectionArgs = new String[] {String.valueOf(CalendarID)};
 						Cursor countCursor = provider.query(Events.CONTENT_URI, new String[] {"count(*) AS count"},
 					                selection,
 					                selectionArgs,
 					                null);
 				        countCursor.moveToFirst();
 				        int count = countCursor.getInt(0);
 				        syncResult.stats.numSkippedEntries += count;
 				        countCursor.close();*/
 					}
 					this.checkDirtyAndroidEvents(provider, account, androidCalendarUri, facade, serverCalendar.getURI(), syncResult.stats, notifyList);
 				} else {
 					// this happens if the data provider failes to get an existing or create a new calendar
 					mCountProviderFailed += 1;
 					Log.e(TAG, "failed to get an existing or create a new calendar");
 					syncResult.stats.numIoExceptions += 1;
 					if (mCountProviderFailed >= mCountProviderFailedMax) {
 						// see issue #96
 						NotificationsHelper.signalSyncErrors(this.getContext(), "Caldav sync error (provider failed)", "are you using CyanogenMod in Incognito Mode?");
 					} else {
 						NotificationsHelper.signalSyncErrors(this.getContext(), "Caldav sync error (provider failed)", "the provider failed to get an existing or create a new calendar");
 					}
 					bolError = true;
 				}
 			}
 			if (!bolError) {
 				// check whether a calendar is not synced -> delete it at android
 				androidCalList.deleteCalendarOnClientSideOnly(this.getContext());
 			}
 			// notify the ContentResolver
 			for (Uri uri : androidCalList.getNotifyList()) {
 				this.getContext().getContentResolver().notifyChange(uri, null);
 			}
 			for (Uri uri : serverCalList.getNotifyList()) {
 				this.getContext().getContentResolver().notifyChange(uri, null);
 			}
 			for (Uri uri : notifyList) {
 				this.getContext().getContentResolver().notifyChange(uri, null);
 			}
 			//Log.i(TAG,"Statistiks for Calendar: " + serverCalendar.getURI().toString());
 			//Log.i(TAG,"Statistiks for AndroidCalendar: " + androidCalendar.getAndroidCalendarUri().toString());
 			Log.i(TAG,"Entries:                       " + String.valueOf(syncResult.stats.numEntries));
 			Log.i(TAG,"Rows inserted:                 " + String.valueOf(syncResult.stats.numInserts));
 			Log.i(TAG,"Rows updated:                  " + String.valueOf(syncResult.stats.numUpdates));
 			Log.i(TAG,"Rows deleted:                  " + String.valueOf(syncResult.stats.numDeletes));
 			Log.i(TAG,"Rows skipped:                  " + String.valueOf(syncResult.stats.numSkippedEntries));
 			Log.i(TAG,"Io Exceptions:                 " + String.valueOf(syncResult.stats.numIoExceptions));
 			Log.i(TAG,"Parse Exceptions:              " + String.valueOf(syncResult.stats.numParseExceptions));
 			Log.i(TAG,"Auth Exceptions:               " + String.valueOf(syncResult.stats.numAuthExceptions));
 			Log.i(TAG,"Conflict Detected Exceptions:  " + String.valueOf(syncResult.stats.numConflictDetectedExceptions));
 		/*} catch (final AuthenticatorException e) {
             syncResult.stats.numParseExceptions++;
             Log.e(TAG, "AuthenticatorException", e);*/
         /*} catch (final OperationCanceledException e) {
             Log.e(TAG, "OperationCanceledExcetpion", e);*/
         } catch (final IOException e) {
             Log.e(TAG, "IOException", e);
             syncResult.stats.numIoExceptions++;
             NotificationsHelper.signalSyncErrors(this.getContext(), "Caldav sync error (IO)", e.getMessage());
             //NotificationsHelper.getCurrentSyncLog().addException(e);
             /*} catch (final AuthenticationException e) {
             //mAccountManager.invalidateAuthToken(Constants.ACCOUNT_TYPE, authtoken);
             syncResult.stats.numAuthExceptions++;
             Log.e(TAG, "AuthenticationException", e);*/
         } catch (final ParseException e) {
             syncResult.stats.numParseExceptions++;
             Log.e(TAG, "ParseException", e);
             NotificationsHelper.signalSyncErrors(this.getContext(), "Caldav sync error (parsing)", e.getMessage());
             //NotificationsHelper.getCurrentSyncLog().addException(e);
         /*} catch (final JSONException e) {
             syncResult.stats.numParseExceptions++;
             Log.e(TAG, "JSONException", e);*/
 		} catch (Exception e) {
 			Log.e(TAG, "Updating calendar exception " + e.getClass().getName(), e);
             syncResult.stats.numParseExceptions++;
             NotificationsHelper.signalSyncErrors(this.getContext(), "Caldav sync error (general)", e.getMessage());
             //NotificationsHelper.getCurrentSyncLog().addException(e);
 			//throw new RuntimeException(e);
 		}
 	}
 	public void onSyncCanceled () {
 		//TODO: implement SyncCanceled
 		this.mCountSyncCanceled += 1;
 		Log.v(TAG, "onSyncCanceled() count:" + String.valueOf(this.mCountSyncCanceled));
 	}
 	/**
 	 * both calender event and android event have been found.
 	 * server wins always at the moment.
 	 * @param androidCalendar
 	 * @param serverCalendar
 	 * @param stats
 	 * @param notifyList
 	 * @throws ClientProtocolException
 	 * @throws URISyntaxException
 	 * @throws IOException
 	 * @throws ParserConfigurationException
 	 * @throws SAXException
 	 * @throws RemoteException
 	 * @throws CaldavProtocolException
 	 * @throws ParserException
 	 * @see SyncAdapter#updateAndroidEvent(ContentProviderClient, Account, AndroidEvent, CalendarEvent)
 	 * @see SyncAdapter#tagAndroidEvent(ContentProviderClient, Account, AndroidEvent)
 	 * @see SyncAdapter#untagAndroidEvents(ContentProviderClient, Account, Uri)
 	 * @see SyncAdapter#deleteUntaggedEvents(ContentProviderClient, Account, Uri)
 	 */
 	private void synchroniseEvents(
 				DavCalendar androidCalendar,
 				DavCalendar serverCalendar,
 				SyncStats stats,
 				ArrayList<Uri> notifyList
 			) throws ClientProtocolException, URISyntaxException, IOException, ParserConfigurationException, SAXException, RemoteException, CaldavProtocolException, ParserException {
 		/*if (DROP_CALENDAR_EVENTS) {
 			dropAllEvents(account, provider, androidCalendar.getAndroidCalendarUri());
 		}*/
 		int rowInsert = 0;
 		int rowUpdate = 0;
 		int rowTag = 0;
 		int rowDelete = 0;
 		int rowUntag = 0;
 		int rowSkip = 0;
 		for (CalendarEvent calendarEvent : serverCalendar.getCalendarEvents()) {
 			try {
 				AndroidEvent androidEvent = calendarEvent.getAndroidEvent(androidCalendar);
 				Log.i(TAG, "Event " + calendarEvent.getUri().toString()+ " androidUri="+androidEvent);
 				if (androidEvent == null) {
 					/* new android event */
 					if (calendarEvent.createAndroidEvent(androidCalendar)) {
 						rowInsert += 1;
 						androidEvent = calendarEvent.getAndroidEvent(androidCalendar);
 						notifyList.add(androidEvent.getUri());
 					} else {
 						rowSkip += 1;
 					}
 				} else {
 					/* the android exists */
 					String androidETag = androidEvent.getETag();
 					if (androidETag == null)
 						androidETag = "";
 					Log.d(TAG, "Event compare: " + androidETag + " <> " + calendarEvent.getETag().toString());
 					if ((androidEvent.getETag() == null) || (!androidETag.equals(calendarEvent.getETag()))) {
 						/* the android event is getting updated */
 						if (calendarEvent.updateAndroidEvent(androidEvent)) {
 							rowUpdate += 1;
 							notifyList.add(androidEvent.getUri());
 						} else {
 							rowSkip += 1;
 						}
 					}
 				}
 				if (androidEvent != null)
 					//if (androidEvent.tagAndroidEvent())
 					if (androidCalendar.tagAndroidEvent(androidEvent))
 						rowTag += 1;
 			} catch (ParserException ex) {
 				Log.e(TAG, "Parser exception", ex);
 				stats.numParseExceptions++;
 	            NotificationsHelper.signalSyncErrors(getContext(), "Caldav sync error (parsing)", ex.getMessage());
 	            //NotificationsHelper.getCurrentSyncLog().addException(ex);
 			} catch (CaldavProtocolException ex) {
 				Log.e(TAG, "Caldav exception", ex);
 				stats.numParseExceptions++;
 	            NotificationsHelper.signalSyncErrors(getContext(), "Caldav sync error (caldav)", ex.getMessage());
 	            //NotificationsHelper.getCurrentSyncLog().addException(ex);
 			}
 		}
 		rowDelete = androidCalendar.deleteUntaggedEvents();
 		rowUntag = androidCalendar.untagAndroidEvents();
 		/*Log.i(TAG,"Statistiks for Calendar: " + serverCalendar.getURI().toString());
 		Log.i(TAG,"Statistiks for AndroidCalendar: " + androidCalendar.getAndroidCalendarUri().toString());
 		Log.i(TAG,"Rows inserted: " + String.valueOf(rowInsert));
 		Log.i(TAG,"Rows updated:  " + String.valueOf(rowUpdate));
 		Log.i(TAG,"Rows deleted:  " + String.valueOf(rowDelete));
 		Log.i(TAG,"Rows skipped:  " + String.valueOf(rowSkip));*/
 		Log.i(TAG,"Rows tagged:   " + String.valueOf(rowTag));
 		Log.i(TAG,"Rows untagged: " + String.valueOf(rowUntag));
 		stats.numInserts += rowInsert;
 		stats.numUpdates += rowUpdate;
 		stats.numDeletes += rowDelete;
 		stats.numSkippedEntries += rowSkip;
 		stats.numEntries += rowInsert + rowUpdate + rowDelete;
 	}
 	/**
 	 * checks the android events for the dirty flag.
 	 * the flag is set by android when the event has been changed.
 	 * the dirty flag is removed when an android event has been updated from calendar event
 	 * @param provider
 	 * @param account
 	 * @param calendarUri
 	 * @param facade
 	 * @param caldavCalendarUri
 	 * @param stats
 	 * @param notifyList
 	 * @return count of dirty events
 	 */
 	private int checkDirtyAndroidEvents(
 				ContentProviderClient provider,
 				Account account,
 				Uri calendarUri,
 				CaldavFacade facade,
 				URI caldavCalendarUri,
 				SyncStats stats,
 				ArrayList<Uri> notifyList
 			) {
 		Cursor curEvent = null;
 		Cursor curAttendee = null;
 		Cursor curReminder = null;
 		Long EventID;
 		Long CalendarID;
 		AndroidEvent androidEvent = null;
 		int rowDirty = 0;
 		int rowInsert = 0;
 		int rowUpdate = 0;
 		int rowDelete = 0;
 		try {
 			CalendarID = ContentUris.parseId(calendarUri);
 			String selection = "(" + Events.DIRTY + " = ?) AND (" + Events.CALENDAR_ID + " = ?)";
 			String[] selectionArgs = new String[] {"1", CalendarID.toString()};
 			curEvent = provider.query(Events.CONTENT_URI, null, selection, selectionArgs, null);
 			while (curEvent.moveToNext()) {
 				EventID = curEvent.getLong(curEvent.getColumnIndex(Events._ID));
 				Uri returnedUri = ContentUris.withAppendedId(Events.CONTENT_URI, EventID);
 				//androidEvent = new AndroidEvent(account, provider, returnedUri, calendarUri);
 				androidEvent = new AndroidEvent(returnedUri, calendarUri);
 				androidEvent.readContentValues(curEvent);
 				selection = "(" + Attendees.EVENT_ID + " = ?)";
 				selectionArgs = new String[] {String.valueOf(EventID)};
 				curAttendee = provider.query(Attendees.CONTENT_URI, null, selection, selectionArgs, null);
 				selection = "(" + Reminders.EVENT_ID + " = ?)";
 				selectionArgs = new String[] {String.valueOf(EventID)};
 				curReminder = provider.query(Reminders.CONTENT_URI, null, selection, selectionArgs, null);
 				androidEvent.readAttendees(curAttendee);
 				androidEvent.readReminder(curReminder);
 				curAttendee.close();
 				curReminder.close();
 				String SyncID = androidEvent.ContentValues.getAsString(Events._SYNC_ID);
 				boolean Deleted = false;
 				int intDeleted = 0;
 				intDeleted = curEvent.getInt(curEvent.getColumnIndex(Events.DELETED));
 				Deleted = (intDeleted == 1);
 				if (SyncID == null) {
 					// new Android event
 					String newGUID = java.util.UUID.randomUUID().toString() + "-caldavsyncadapter";
 					String calendarPath = caldavCalendarUri.getPath();
 					if (!calendarPath.endsWith("/"))
 						calendarPath += "/";
 					SyncID = calendarPath + newGUID + ".ics";
 					androidEvent.createIcs(newGUID);
 					if (facade.createEvent(URI.create(SyncID), androidEvent.getIcsEvent().toString())) {
 						//HINT: bugfix for google calendar replace("@", "%40")
 						if (SyncID.contains("@"))
 							SyncID = SyncID.replace("@", "%40");
 						ContentValues values = new ContentValues();
 						values.put(Events._SYNC_ID, SyncID);
 						//google doesn't send the etag after creation
 						//HINT: my SabreDAV send always the same etag after putting a new event
 						//String LastETag = facade.getLastETag();
 						//if (!LastETag.equals("")) {
 						//	values.put(Event.ETAG, LastETag);
 						//} else {
 							//so get the etag with a new REPORT
 							CalendarEvent calendarEvent = new CalendarEvent(account, provider);
 							calendarEvent.calendarURL = caldavCalendarUri.toURL();
 							URI SyncURI = new URI(SyncID);
 							calendarEvent.setUri(SyncURI);
 							CaldavFacade.getEvent(calendarEvent);
 							values.put(Event.ETAG, calendarEvent.getETag());
 						//}
 						values.put(Event.UID, newGUID);
 						values.put(Events.DIRTY, 0);
 						values.put(Event.RAWDATA, androidEvent.getIcsEvent().toString());
 						int rowCount = provider.update(asSyncAdapter(androidEvent.getUri(), account.name, account.type), values, null, null);
 						if (rowCount == 1) {
 							rowInsert += 1;
 							notifyList.add(androidEvent.getUri());
 						}
 					}
 				} else if (Deleted) {
 					// deleted Android event
 					if (facade.deleteEvent(URI.create(SyncID), androidEvent.getETag())) {
 						String mSelectionClause = "(" + Events._ID +  "= ?)";
 						String[] mSelectionArgs = {String.valueOf(EventID)};
 						int countDeleted = provider.delete(asSyncAdapter(Events.CONTENT_URI, account.name, account.type), mSelectionClause, mSelectionArgs);
 						if (countDeleted == 1) {
 							rowDelete += 1;
 							notifyList.add(androidEvent.getUri());
 						}
 					}
 				} else {
 					//update the android event to the server
 					String uid = androidEvent.getUID();
 					if ((uid == null) || (uid.equals(""))) {
 						//COMPAT: this is needed because in the past, the UID was not stored in the android event
 						CalendarEvent calendarEvent = new CalendarEvent(account, provider);
 						URI syncURI = new URI(SyncID);
 						calendarEvent.setUri(syncURI);
 						calendarEvent.calendarURL = caldavCalendarUri.toURL();
 						if (calendarEvent.fetchBody()) {
 							calendarEvent.readContentValues();
 							uid = calendarEvent.getUID();
 						}
 					}
 					if (uid != null) {
 						androidEvent.createIcs(uid);
 						if (facade.updateEvent(URI.create(SyncID), androidEvent.getIcsEvent().toString(), androidEvent.getETag())) {
 							selection = "(" + Events._ID + "= ?)";
 							selectionArgs = new String[] {EventID.toString()};
 							androidEvent.ContentValues.put(Events.DIRTY, 0);
 							//google doesn't send the etag after update
 							String LastETag = facade.getLastETag();
 							if (!LastETag.equals("")) {
 								androidEvent.ContentValues.put(Event.ETAG, LastETag);
 							} else {
 								//so get the etag with a new REPORT
 								CalendarEvent calendarEvent = new CalendarEvent(account, provider);
 								calendarEvent.calendarURL = caldavCalendarUri.toURL();
 								URI SyncURI = new URI(SyncID);
 								calendarEvent.setUri(SyncURI);
 								CaldavFacade.getEvent(calendarEvent);
 								androidEvent.ContentValues.put(Event.ETAG, calendarEvent.getETag());
 							}
 							androidEvent.ContentValues.put(Event.RAWDATA, androidEvent.getIcsEvent().toString());
 							int RowCount = provider.update(asSyncAdapter(androidEvent.getUri(), account.name, account.type), androidEvent.ContentValues, null, null);
 							if (RowCount == 1) {
 								rowUpdate += 1;
 								notifyList.add(androidEvent.getUri());
 							}
 						} else {
 							rowDirty += 1;
 						}
 					} else {
 						rowDirty += 1;
 					}
 				}
 			}
 			curEvent.close();
 			/*if ((rowInsert > 0) || (rowUpdate > 0) || (rowDelete > 0) || (rowDirty > 0)) {
 				Log.i(TAG,"Android Rows inserted: " + String.valueOf(rowInsert));
 				Log.i(TAG,"Android Rows updated:  " + String.valueOf(rowUpdate));
 				Log.i(TAG,"Android Rows deleted:  " + String.valueOf(rowDelete));
 				Log.i(TAG,"Android Rows dirty:    " + String.valueOf(rowDirty));
 			}*/
 			stats.numInserts += rowInsert;
 			stats.numUpdates += rowUpdate;
 			stats.numDeletes += rowDelete;
 			stats.numSkippedEntries += rowDirty;
 			stats.numEntries += rowInsert + rowUpdate + rowDelete;
 		} catch (RemoteException e) {
 			e.printStackTrace();
 		} catch (URISyntaxException e) {
 			// TODO Automatisch generierter Erfassungsblock
 			e.printStackTrace();
 		} catch (ClientProtocolException e) {
 			// TODO Automatisch generierter Erfassungsblock
 			e.printStackTrace();
 		} catch (IOException e) {
 			// TODO Automatisch generierter Erfassungsblock
 			e.printStackTrace();
 		} catch (CaldavProtocolException e) {
 			// TODO Automatisch generierter Erfassungsblock
 			e.printStackTrace();
 		} catch (ParserException e) {
 			// TODO Automatisch generierter Erfassungsblock
 			e.printStackTrace();
 		}
 		return rowDirty;
 	}
 /*	private Account UpgradeAccount(Account OldAccount) {
 		String Username = OldAccount.name;
 		String Type = OldAccount.type;
 		String Password = this.mAccountManager.getPassword(OldAccount);
 		String Url = this.mAccountManager.getUserData(OldAccount, AuthenticatorActivity.USER_DATA_URL_KEY);
 		Account NewAccount = new Account(Username + AuthenticatorActivity.ACCOUNT_NAME_SPLITTER + Url, Type);
 		if (this.mAccountManager.addAccountExplicitly(NewAccount, Password, null)) {
 			this.mAccountManager.setUserData(NewAccount, AuthenticatorActivity.USER_DATA_URL_KEY, Url);
 			this.mAccountManager.setUserData(NewAccount, AuthenticatorActivity.USER_DATA_USERNAME, Username);
 		}
 		this.mAccountManager.removeAccount(OldAccount, null, null);
 		return NewAccount;
 	}*/
 /*	private void dropAllEvents(Account account, ContentProviderClient provider,	Uri calendarUri) throws RemoteException {
 		Log.i(TAG, "Deleting all calendar events for "+calendarUri);
 		String selection = "(" + Events.CALENDAR_ID + " = ?)";
 		String[] selectionArgs = new String[] {Long.toString(ContentUris.parseId(calendarUri))};
 		provider.delete(asSyncAdapter(Events.CONTENT_URI, account.name, account.type),
 				        selection, selectionArgs);
 	}*/
 	private static Uri asSyncAdapter(Uri uri, String account, String accountType) {
 	    return uri.buildUpon()
 	        .appendQueryParameter(android.provider.CalendarContract.CALLER_IS_SYNCADAPTER,"true")
 	        .appendQueryParameter(Calendars.ACCOUNT_NAME, account)
 	        .appendQueryParameter(Calendars.ACCOUNT_TYPE, accountType).build();
 	 }
 }

Caldavsync Sources / annotate

src/org/gege/caldavsyncadapter/syncadapter/SyncAdapter.java@fb9019fb1bf7 (annotated)

src/org/gege/caldavsyncadapter/syncadapter/SyncAdapter.java