Question

I need to get a value from my cursor. The value needs to be in this format:

        List<double[]> values = new ArrayList<double[]>();

The problem is when I do the “.add” it errors wanting me to change it to “length”. I have to have it in the List for the app to work at all. Here is my code, is there a way to do that? What am I doing wrong?

    cursor = managedQuery(Provider.CONTENT_URI,
            proj,
            null,
            null,
            null);

            while (cursor.moveToNext()) { 
        double value; 
        column_value = cursor.getColumnIndex(CsvProvider.VALUE);
        value = cursor.getDouble(column_value);
        values.add(value); //this did not work
        values.add(new double[] {value}); //this did work
    } ;

Thanks Mike!

Answer 1

First of all, you should never paraphrase errors. If you get an error, copy and paste it into your question.

As to your problem:

You have a list of double arrays, i.e. every single entry in your cValues List needs to be a double[]. Instead, however, you’re just adding a plain double. That won’t work. I don’t know how your list is supposed to be setup, if you put the [] in by mistake or if you really need a list of arrays, but assuming that every entry needs an array of one double, then you need to add a new double[] { value }.

Side note: Why not simply while (cursor.moveToNext()) { ... } instead of this do/while construct?