IntroActivity

private class DatabaseLoadTask extends AsyncTask<Void, Void, Void> {

        @Override
        public Void doInBackground(Void... params) {
            Repository.getInstance().addArrayOfStringsList(CsvHelper.readArrayOfStringsList(), new Repository.TransactionListener() {
            
                @Override
                public boolean isCancelled() {
                    return DatabaseLoadTask.this.isCancelled();
                }
            });
            return null;
        }

        @Override
        public void onPostExecute(Void result) {
            super.onPostExecute(result);
            PreferenceUtils.setDatabaseWasLoaded();
            if (userClickFinishIntro) {
                finishIntro();
            }
        }
    }

Repository

public void addArrayOfStringsList(List<String[]> lineList, TransactionListener transactionListener) {
        if (lineList != null) {
            Iterator<String[]> lineIterator = lineList.iterator();
            database.beginTransaction();
            while (lineIterator.hasNext()) {
                if (transactionListener.isCancelled()) {
                    database.endTransaction();
                    break;
                }
                List<String> stringList = Arrays.asList(lineIterator.next());
                if (stringList.size() == CsvHelper.COLUMN_COUNT) {
                    Iterator<String> stringIterator = stringList.iterator();
                    ContentValues contentValues = new ContentValues();
                    String name = stringIterator.next();
                    contentValues.put(DbHelper.COLUMN_NAME, name);
                    contentValues.put(DbHelper.COLUMN_CALORIES, NumberUtils.toDouble(stringIterator.next(), 0));
                    contentValues.put(DbHelper.COLUMN_PROTEIN, NumberUtils.toDouble(stringIterator.next(), 0));
                    contentValues.put(DbHelper.COLUMN_FAT, NumberUtils.toDouble(stringIterator.next(), 0));
                    contentValues.put(DbHelper.COLUMN_CARBOHYDRATES, NumberUtils.toDouble(stringIterator.next(), 0));
                    long rowId = database.insert(DbHelper.TABLE_DISHES_NAME, null, contentValues);
                    Log.d(LOG_TAG, "row inserted, ID = " + rowId + ", " + DbHelper.COLUMN_NAME + " " + name);
                }
            }
            database.setTransactionSuccessful();
            database.endTransaction();
        }
    }


    public interface TransactionListener {

        boolean isCancelled();
    }