protected void saveCategoriesInTransaction(CategoryTree tree) {
SQLiteDatabase database = db.db();
database.beginTransaction();
try {
insertInTransaction(tree);
database.setTransactionSuccessful();
} finally {
database.endTransaction();
}
}
public void insertInTransaction(CategoryTree tree) {
db.db().delete("category", null, null);
db.reInsertCategory(Category.splitCategory(context));
db.reInsertCategory(Category.noCategory(context));
insertInTransaction(tree.getRoot().children);
}