Some class i wrote today to transparent update the BackupAgent when using the SharedPreferences Editor and the BackupAgent. The Basic Idea is to have an Util class which provides access to the SharedPreferences and its Editor

SharedPreferencesUtil

/**
 * Utils class which allows to write more easy access of the {@link SharedPreferences}
 * 
 * @author Jens Hohl
 * 
 */
public final class SharedPreferencesUtil
{
	
	private final String SHARED_PREFERENCES_NAME = "yourSharedPreferencesFileName.xml";

	private SharedPreferencesUtil()
	{
	}


	/**
	 * Returns the Name of the Shared Preferences File
	 * 
	 * @return
	 */
	public static String getSharedPreferencesFileName()
	{
		return SHARED_PREFERENCES_NAME;
	}


	public static SharedPreferences getPreferences(final Context aContext)
	{
		MorePreconditions.checkNotNull(aContext, "context");
		return aContext.getSharedPreferences(SHARED_PREFERENCES_NAME, 0);
	}


	public static Editor getPreferencesEditor(final Context aContext)
	{
		MorePreconditions.checkNotNull(aContext, "context");
		final CustomEditor editor = new CustomEditor(aContext, aContext.getSharedPreferences(
				SHARED_PREFERENCES_NAME, 0).edit());
		return editor;
	}

	/**
	 * Enhanced {@link Editor} which allows to request the {@link BackupAgent} transparently
	 * 
	 * @author Jens hohl
	 * 
	 */
	private final static class CustomEditor implements Editor
	{

		private final Editor	delegate;

		private final Context	context;


		/**
		 * 
		 * @param aContext
		 * @param editor
		 */
		private CustomEditor(@Nonnull final Context aContext, @Nonnull final Editor editor)
		{
			MorePreconditions.checkNotNull(aContext, "Context");
			MorePreconditions.checkNotNull(editor, "Editor");
			//
			context = aContext;
			delegate = editor;
		}


		@Override
		public void apply()
		{
			delegate.apply();
			final android.app.backup.BackupManager manager = new android.app.backup.BackupManager(context);
			manager.dataChanged();

		}


		@Override
		public Editor clear()
		{
			return delegate.clear();
		}


		@Override
		public boolean commit()
		{
			final boolean returnValue = delegate.commit();
			final android.app.backup.BackupManager manager = new android.app.backup.BackupManager(context);
			manager.dataChanged();

			return returnValue;
		}


		@Override
		public Editor putBoolean(final String key, final boolean value)
		{
			return delegate.putBoolean(key, value);
		}


		@Override
		public Editor putFloat(final String key, final float value)
		{
			return delegate.putFloat(key, value);
		}


		@Override
		public Editor putInt(final String key, final int value)
		{
			return delegate.putInt(key, value);
		}


		@Override
		public Editor putLong(final String key, final long value)
		{
			return delegate.putLong(key, value);
		}


		@Override
		public Editor putString(final String key, final String value)
		{
			return delegate.putString(key, value);
		}


		@Override
		public Editor putStringSet(final String key, final Set<String> set)
		{
			return delegate.putStringSet(key, set);
		}


		@Override
		public Editor remove(final String key)
		{
			return delegate.remove(key);
		}

	}

}