@Override
  public boolean mHasNotSend() {

    SQLiteDatabase db = dbHelper.getReadableDatabase();

    Cursor cursor = db.rawQuery("SELECT COUNT(1) FROM " + TABLE, null);

    cursor.moveToFirst();

    boolean isSend = cursor.getLong(0) > 0 ? true : false;

    cursor.close();

    return isSend;
  }
  @Override
  public void save(long rowid) {

    SQLiteDatabase db = dbHelper.getWritableDatabase();

    db.beginTransaction();

    ContentValues values = new ContentValues();

    values.put("not_send_rowid", rowid);

    db.insert(TABLE, null, values);

    db.setTransactionSuccessful();

    db.endTransaction();
  }
  @Override
  public List<String> findAll() {

    SQLiteDatabase db = dbHelper.getReadableDatabase();

    Cursor cursor = db.rawQuery("SELECT not_send_rowid FROM BLIT_OVERLAY_NOTSEND", null);

    List<String> rowids = new ArrayList<String>();

    long rowid = 0;

    while (cursor.moveToNext()) {

      rowid = cursor.getLong(0);

      rowids.add(rowid + "");
    }

    return rowids;
  }
 @Override
 public void closeDB() {
   dbHelper.close();
 }