Every time when app launches it reads data from csv and repeated data is going into sqlite database

I am trying to read data from csv file and inserting into sqlite database.But all data were not getting inserting into database. Suggest me suitable code for it

Main Activity

// reading csv file from raw folder

private void insertFromCsvToSqliteDB()` {

    databaseHelper = new DatabaseHelper(this);
    InputStream inputStream = getResources().openRawResource(
            R.raw.appconfig);
//  Log.i(TAG, "inputStream: " + inputStream);

    List<String[]> resultList = new ArrayList<String[]>();
    //Log.i(TAG, "resultList: " + resultList);
    BufferedReader reader = new BufferedReader(new InputStreamReader(
            inputStream));
    try {
        String csvLine;
        while ((csvLine = reader.readLine()) != null) {
            Log.i(TAG, "csvLine: " + csvLine);
            row = csvLine.split(",");

            resultList.add(row);

            // loop for inserting values into table
            databaseHelper.insertContact(row[0], row[1], row[2], row[3],
                    row[4], row[5], row[6]);
        }
    } catch (IOException e) {
        e.printStackTrace();
    }
}

Database Helper

public boolean insertContact(String[] rowData) {
    // TODO Auto-generated method stub`

    Log.i(TAG, "inside insertContact()");
    db = this.getWritableDatabase();
    ContentValues contentValues = new ContentValues();
    contentValues.put("DistrictCd", rowData[0]);
    contentValues.put("ProspectId", rowData[1]);
    contentValues.put("categorydesc",rowData[2]);
    contentValues.put("BusinessName", rowData[3]);
    contentValues.put("ph_Phone", rowData[4]);
    contentValues.put("LandMark", rowData[5]);
    contentValues.put("CategoryId", rowData[6]);
    db.insert("Category", null, contentValues);

    Log.i(TAG, "data inserted succesfully into db");
    return true;

}

Let me suggestions if any for resolving this issue