getMaxId() from a SQLite Database in Android - Index 0 requested, with a size of 0

I know this is covered often, but I cant find the mistake.

public Integer getMaxId() {
    SQLiteDatabase db = this.getWritableDatabase();
    Cursor cursor = db.rawQuery("SELECT MAX(LINE) FROM datab_table", null);
    if (cursor != null && cursor.moveToFirst()) {
        id = cursor.getInt(0);
        cursor.close();
    }
    return id;
}

I get this error:

android.database.CursorIndexOutOfBoundsException: Index 0 requested, with a size of 0