add DB stuff for offline category sync

src/org/fox/ttrss/offline/OfflineDownloadService.java

@@ -11,6 +11,7 @@ import org.fox.ttrss.R.drawable;
 import org.fox.ttrss.R.string;
 import org.fox.ttrss.types.Article;
 import org.fox.ttrss.types.Feed;
+import org.fox.ttrss.types.FeedCategory;
 import org.fox.ttrss.util.DatabaseHelper;
 import org.fox.ttrss.util.ImageCacheService;
 import org.jsoup.Jsoup;
@@ -263,6 +264,69 @@ public class OfflineDownloadService extends Service {
 		req.execute(map);
 	}
 
+	private void downloadCategories() {
+
+		updateNotification(R.string.notify_downloading_feeds);
+		
+		getWritableDb().execSQL("DELETE FROM categories;");
+		
+		ApiRequest req = new ApiRequest(getApplicationContext()) {
+			@Override
+			protected void onPostExecute(JsonElement content) {
+				if (content != null) {
+					
+					try {
+						Type listType = new TypeToken<List<FeedCategory>>() {}.getType();
+						List<FeedCategory> cats = new Gson().fromJson(content, listType);
+						
+						SQLiteStatement stmtInsert = getWritableDb().compileStatement("INSERT INTO categories " +
+								"("+BaseColumns._ID+", title) " +
+						"VALUES (?, ?);");
+						
+						for (FeedCategory cat : cats) {
+							stmtInsert.bindLong(1, cat.id);
+							stmtInsert.bindString(2, cat.title);
+
+							stmtInsert.execute();
+						}
+
+						stmtInsert.close();
+
+						Log.d(TAG, "offline: done downloading categories");
+						
+						if (m_canProceed) { 
+							downloadFeeds();
+						} else {
+							downloadFailed();
+						}
+					} catch (Exception e) {
+						e.printStackTrace();
+						updateNotification(R.string.offline_switch_error);
+						downloadFailed();
+					}
+				
+				} else {
+					updateNotification(getErrorMessage());
+					downloadFailed();
+				}
+			}
+
+		};
+		
+		@SuppressWarnings("serial")
+		HashMap<String,String> map = new HashMap<String,String>() {
+			{
+				put("op", "getFeeds");
+				put("sid", m_sessionId);
+				put("cat_id", "-3");
+				put("unread_only", "true");
+			}			 
+		};
+		
+		req.execute(map);
+	}
+
+	
 	@Override
 	public void onDestroy() {
 		super.onDestroy();

src/org/fox/ttrss/offline/OfflineHeadlinesFragment.java

@@ -151,6 +151,9 @@ public class OfflineHeadlinesFragment extends Fragment implements OnItemClickLis
 		list.setEmptyView(view.findViewById(R.id.no_headlines));
 		registerForContextMenu(list);
 
+		if (m_offlineServices.isSmallScreen())
+			view.findViewById(R.id.headlines_fragment).setPadding(0, 0, 0, 0);
+		
 		getActivity().setProgressBarIndeterminateVisibility(false);
 
 		return view;    	

src/org/fox/ttrss/util/DatabaseHelper.java

@@ -10,7 +10,7 @@ public class DatabaseHelper extends SQLiteOpenHelper {
 	@SuppressWarnings("unused")
 	private final String TAG = this.getClass().getSimpleName();
 	public static final String DATABASE_NAME = "OfflineStorage.db";
-	public static final int DATABASE_VERSION = 2;
+	public static final int DATABASE_VERSION = 3;
 	
 	public DatabaseHelper(Context context) {
 		super(context, DATABASE_NAME, null, DATABASE_VERSION);
@@ -18,6 +18,7 @@ public class DatabaseHelper extends SQLiteOpenHelper {
 	
 	@Override
 	public void onCreate(SQLiteDatabase db) {
+		db.execSQL("DROP TABLE IF EXISTS categories;");
 		db.execSQL("DROP TABLE IF EXISTS feeds;");
 		db.execSQL("DROP TABLE IF EXISTS articles;");
 		db.execSQL("DROP VIEW IF EXISTS feeds_unread;");
@@ -31,6 +32,11 @@ public class DatabaseHelper extends SQLiteOpenHelper {
                 "cat_id INTEGER" +
                 ");");                
 
+		db.execSQL("CREATE TABLE IF NOT EXISTS categories (" +
+                BaseColumns._ID + " INTEGER PRIMARY KEY AUTOINCREMENT," +
+                "title TEXT" +
+                ");");                
+
 		db.execSQL("CREATE TABLE IF NOT EXISTS articles (" +
                 BaseColumns._ID + " INTEGER PRIMARY KEY AUTOINCREMENT," +
                 "unread BOOLEAN, " +