Android Java String Array using ArrayList

Question

I am populating JSON parsed data into Dialog, like this:

String[] colors = new String[] {cArrayList.toString()};
Log.d("colors::-", Arrays.toString(colors));

GETTING

EXPECTED

`String[] colors = new String[]{ cArrayList.size() };` What are you attempting to do here? Create an array of Strings of that size or put the size of that arraylist as the first element in the colors array? — Marc Baumbach, Sep 19 '15 at 05:06

score 2 · Accepted Answer · edited Sep 19 '15 at 08:21

2

As per your requirement you can do following if your cArrayList is ArrayList

String[] colors = new String[cArrayList.size()] ;
for(int i=0;i<cArrayList.size();i++)
{
  colors[i]=cArrayList.get(i);
}

Alternatively, you can use the more concise and faster approach:

String[] colors = cArrayList.toArray(new String[cArrayList.size()]);

edited Sep 19 '15 at 08:21

Clashsoft

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answered Sep 19 '15 at 05:09

Pavan

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getting NPE at this line checkedColors[which] = isChecked; check this: http://pastebin.com/81PBd4Rd – Oreo Sep 19 '15 at 06:47
where you defining checkedColors i dint see initialization of checkedColors – Pavan Sep 19 '15 at 06:54
global boolean[] checkedColors = null; @Pavan check this : http://pastebin.com/81PBd4Rd – Oreo Sep 19 '15 at 06:54
Let us [continue this discussion in chat](http://chat.stackoverflow.com/rooms/90093/discussion-between-oreo-and-pavan). – Oreo Sep 19 '15 at 06:55

score 0 · Answer 2 · edited May 23 '17 at 11:44

0

Like in Core Java you convert int[] to List<Integer> same as the code shows below:

    int[] ints = {100,1000,10000};
    List<Integer> ls = new ArrayList<Integer>();
    for (int index = 0; index < ints.length; index++)
    {
        ls.add(ints[index]);
    }

View reference How to convert int[] into List in Java?

edited May 23 '17 at 11:44

Community

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answered Sep 19 '15 at 05:16

Divyesh Kanzariya

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score 0 · Answer 3 · edited Sep 19 '15 at 14:56

0

To convert your integer value to a string use:

String.valueOf(insert your integer value here);

edited Sep 19 '15 at 14:56

sschrass

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answered Sep 19 '15 at 05:27

akhil batlawala

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It convert your integer value to string – akhil batlawala Sep 19 '15 at 05:28

Android Java String Array using ArrayList

3 Answers3