Sync Adapter

[Costas]

http://developer.android.com/training/sync-adapters/creating-sync-adapter.html

http://udinic.wordpress.com/2013/07/24/write-your-own-android-sync-adapter/ *OR* https://github.com/Udinic/SyncAdapter

http://www.slideshare.net/AlexTumanoff/android-sync-adapter

http://www.vogella.com/tutorials/AndroidSQLite/article.html#contentprovider_overview

http://chariotsolutions.com/blog/post/android-data-sync/ (source http://codehighway.postach.io/android-data-sync)

http://www.manning.com/sessa/50AH_Sample05.pdf

http://naked-code.blogspot.gr/2011/05/revenge-of-syncadapter-synchronizing.html

http://www.c99.org/2010/01/23/writing-an-android-sync-provider-part-1/comment-page-1/

http://github.com/vseguip/Sweet


 

What is a content provider?

A SQLite database is private to the application which creates it. If you want to share data with other applications you can use a content provider (short provider).

A provider allows applications to access data. In most cases this data is stored in an SQlite database.

While a content provider can be used within an application to access data, its is typically used to share data with other application. As application data is by default private, a content provider is a convenient to share you data with other application based on a structured interface.

A content provider must be declared in the AndroidManifest.xml file.

http://www.tutorialspoint.com/android/android_content_providers.htm
http://www.techotopia.com/index.php/An_Android_Content_Provider_Tutorial
http://www.mysamplecode.com/2012/11/android-database-content-provider.html

generators
http://github.com/Trikke/android-sqlite-generator
http://github.com/novoda/sqlite-provider
http://github.com/BoD/android-contentprovider-generator
http://github.com/mediarain/RoboCoP
BambooStorage

SyncAdapter

SyncResult by 43matthew - source http://stackoverflow.com/a/17354811
 
The SyncResult object has a delayUntil field that you can set from your sync adapter which will delay each following sync by the specified number of seconds.
 
Otherwise, the sync will be rescheduled if
 
SyncResult.madeSomeProgress() returns true - i.e. some work was successfully accomplished by the sync (corresponding to stats.numDeletes, stats.numInserts > 0, stats.numUpdates > 0) SyncResult.hasSoftError() returns true - i.e. it failed due to an IOException or because SyncResult.syncAlreadyInProgress was true.

The sync adapter can set SyncResult.tooManyRetries = true which will indicate to the SyncManager that the sync is not to rescheduled

PeriodicSync by Christopher Alexander - source http://digitalassassin.net/2014/03/contentresolver-addperiodicsync-doesnt-work-never-syncs/
 
1)You must call ContentResolver.setSyncAutomatically with true as the third (sync) parameter to enable syncing for your adaptor.
2)The fourth (pollFrequency) parameter of ContentResolver.addPeriodicSync is a number of seconds, as stated here, and not milliseconds, as implied in the training guide. The demo code for addPeriodicSync in the training guide will cause a sync once every thousand hours instead of once an hour. aka

//http://developer.android.com/training/sync-adapters/running-sync-adapter.html#RunPeriodic
//http://commondatastorage.googleapis.com/androiddevelopers/shareables/training/BasicSyncAdapter.zip

//SyncUtils.java
Line  33 -     private static final long SYNC_FREQUENCY = 60 * 60;

sync every 3mins :

ContentResolver.setIsSyncable(mConnectedAccount, AutomotoServiceContentProvider.AUTHORITY, 1);
ContentResolver.setSyncAutomatically(mConnectedAccount, AutomotoServiceContentProvider.AUTHORITY, true);
ContentResolver.addPeriodicSync(mConnectedAccount, AutomotoServiceContentProvider.AUTHORITY, bnd, 180);

trigger refresh by application option (cutted frlyom official android example)

	public void TriggerRefresh() {
		Bundle b = new Bundle();
		// Disable sync backoff and ignore sync preferences. In other words...perform sync NOW!
		b.putBoolean(ContentResolver.SYNC_EXTRAS_MANUAL, true);
		b.putBoolean(ContentResolver.SYNC_EXTRAS_EXPEDITED, true);
		ContentResolver.requestSync(mConnectedAccount, // Sync account
				AutomotoServiceContentProvider.AUTHORITY, // Content authority
				b); // Extras
	}