Android Convert List<String[]> to String[]

Question

Android How to Convert List<String[]> to String[].....

You can't do that. A List<String[]> is something that contains many String[]s. Unless you're trying to flatten the list and combine all your inner String[] elements into a single String[] array. — BoltClock
– BoltClock, Commented Apr 9, 2011 at 6:57
What a question? You are the winner of "Most impressive question". Give more details with your question to have good answers — Paresh Mayani
– Paresh Mayani, Commented Apr 9, 2011 at 6:58
What do you have, List<String> to convert to String[] or List<String[]> to convert to String[][]? — Aleadam
– Aleadam, Commented Apr 9, 2011 at 7:01
@Dante isn't then two problems? One easy (List<String> to String[]) and one more interesting (String[] to String) — Aleadam
– Aleadam, Commented Apr 9, 2011 at 7:33

Jim Blackler · Accepted Answer · 2011-04-09 07:42:06Z

10

    static String[] convert(List<String[]> from) {
        ArrayList<String> list = new ArrayList<String>();
        for (String[] strings : from) {
            Collections.addAll(list, strings);
        }
        return list.toArray(new String[list.size()]);
    }

Example use:

    public static void main(String[] args) {
        List<String[]> list = new ArrayList<String[]>();
        list.add(new String[] { "one", "two" });
        list.add(new String[] { "three", "four", "five" });
        list.add(new String[] { "six", "seven" });
        String[] converted = convert(list);
        System.out.print(converted.toString());
    }

answered Apr 9, 2011 at 7:42

Jim Blackler

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Rajath · Accepted Answer · 2011-04-09 07:08:35Z

1

If you are trying to convert a List< String> to a String[ ], you can use List.toArray()

answered Apr 9, 2011 at 7:08

Rajath

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