@@ -0,0 +1,1135 @@
+package org.stepic.droid.store.structure;%0A%0Apublic class DbStructureCertificateViewItem %7B%0A    private static String%5B%5D mUsedColumns = null;%0A%0A    public static final String CERTIFICATE_VIEW_ITEM = %22certificate_view_item%22;%0A%0A    public static final class Column %7B%0A%0A        public static final String CERTIFICATE_ID = %22certificate_id%22;%0A        public static final String TITLE = %22title%22;%0A        public static final String COVER_FULL_PATH = %22cover_full_path%22;%0A        public static final String TYPE = %22type%22;%0A        public static final String FULL_PATH = %22full_path%22;%0A        public static final String GRADE = %22grade%22;%0A        public static final String ISSUE_DATE = %22issue_date%22;%0A%0A    %7D%0A%0A    public static String%5B%5D getUsedColumns() %7B%0A        if (mUsedColumns == null) %7B%0A            mUsedColumns = new String%5B%5D%7B%0A                    Column.CERTIFICATE_ID,%0A                    Column.TITLE,%0A                    Column.COVER_FULL_PATH,%0A                    Column.TYPE,%0A                    Column.FULL_PATH,%0A                    Column.GRADE,%0A                    Column.ISSUE_DATE%0A            %7D;%0A        %7D%0A        return mUsedColumns;%0A    %7D%0A%7D%0A

add db structure for ViewItem