SQLite Arraylist crashing android activity

I'm having a problem with android and sqlite. When I receive data in the Arraylist the application crashes.

The DbHelper code is as follows:

ArrayList<String> array_list = new ArrayList<String>();

    SQLiteDatabase db = this.getReadableDatabase();
    Cursor res =  db.rawQuery( "select * from "+TABLE_ACCELEROMETER_NAME+";", null );
    res.moveToFirst();

    while(res.isAfterLast() == false){
        array_list.add(res.getString(1));
        res.moveToNext();
    }

    return array_list;
}

The activity code is as follows:

protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_view_data);

    mydb = new DbHelper(this);

    ArrayList array_list = mydb.getAllAccelerometerRegists();


}