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up vote 6 down vote favorite
2

I want to ask a question about converting a jsonArray to a StringArray on android. Here is my code to get jsonArray from server.

try {
    DefaultHttpClient defaultClient = new DefaultHttpClient();
    HttpGet httpGetRequest = new HttpGet("http://server/android/listdir.php");
    HttpResponse httpResponse = defaultClient.execute(httpGetRequest);

    BufferedReader reader = new BufferedReader(new InputStreamReader(httpResponse.getEntity().getContent(),"UTF-8"));

    String json = reader.readLine();

    //JSONObject jsonObject = new JSONObject(json);
    JSONArray jsonArray = new JSONArray(json);
    Log.d("", json);

    //Toast.makeText(getApplicationContext(), json, Toast.LENGTH_SHORT).show();

} catch (Exception e) {
    // TODO Auto-generated catch block
    e.printStackTrace();
}

And this is the JSON.

[{"name":"IMG_20130403_140457.jpg"},{"name":"IMG_20130403_145006.jpg"},{"name":"IMG_20130403_145112.jpg"},{"name":"IMG_20130404_085559.jpg"},{"name":"IMG_20130404_113700.jpg"},{"name":"IMG_20130404_113713.jpg"},{"name":"IMG_20130404_135706.jpg"},{"name":"IMG_20130404_161501.jpg"},{"name":"IMG_20130405_082413.jpg"},{"name":"IMG_20130405_104212.jpg"},{"name":"IMG_20130405_160524.jpg"},{"name":"IMG_20130408_082456.jpg"},{"name":"test.jpg"}]

How can I convert jsonArray that I've got to StringArray so I can get StringArray like this:

array = {"IMG_20130403_140457.jpg","IMG_20130403_145006.jpg",........,"test.jpg"};

Thank you for your help... :)

share|improve this question
    
you should accept an answer if you get it. –  vinoth Apr 8 '13 at 4:40
    
Why do you want to do that and waste resources? –  Nezam Apr 8 '13 at 4:45
    
@Nezam, excuse me, what do you mean..? –  andikurnia Apr 8 '13 at 4:50
    
Why would you want to convert a JSONArray which you showed to an ArrayList or an Array.Any special use? –  Nezam Apr 8 '13 at 4:51
    
yes, in spesification list it had to be stringArray... :( –  andikurnia Apr 8 '13 at 4:58

6 Answers 6

up vote 11 down vote accepted

take a look at this tutorial also you can parse above json like 

JSONArray arr = new JSONArray(yourJSONresponse);
List<String> list = new ArrayList<String>();
for(int i = 0; i < arr.length(); i++){
    list.add(arr.getJSONObject(i).getString("name"));
}
share|improve this answer
    
this convert to Array List first, then I can convert again to StringArray, thank to give an idea... (y) –  andikurnia Apr 8 '13 at 8:36
up vote 0 down vote

There you go:

String tempNames = jsonObj.names().toString();  
String[] types = tempNames.substring(1, tempNames.length()-1).split(","); //remove [ and ] , then split by ','
share|improve this answer
up vote 3 down vote

Here is the code : 

// XXX satisfies only with this particular string format
        String s = "[{\"name\":\"IMG_20130403_140457.jpg\"},{\"name\":\"IMG_20130403_145006.jpg\"},{\"name\":\"IMG_20130403_145112.jpg\"},{\"name\":\"IMG_20130404_085559.jpg\"},{\"name\":\"IMG_20130404_113700.jpg\"},{\"name\":\"IMG_20130404_113713.jpg\"},{\"name\":\"IMG_20130404_135706.jpg\"},{\"name\":\"IMG_20130404_161501.jpg\"},{\"name\":\"IMG_20130405_082413.jpg\"},{\"name\":\"IMG_20130405_104212.jpg\"},{\"name\":\"IMG_20130405_160524.jpg\"},{\"name\":\"IMG_20130408_082456.jpg\"},{\"name\":\"test.jpg\"}]";
        s = s.replace("[", "").replace("]", "");
        s = s.substring(1, s.length() - 1);
        String[] split = s.split("[}][,][{]");
        for (String string : split) {
            System.out.println(string);
        }
share|improve this answer
    
hmm, I would like if the code is for dynamic data.. but thank you for your answer... :) –  andikurnia Apr 8 '13 at 5:00
    
@andikurnia You have to get the dynamic data in s. please accept the answer if it works for you. –  Visruth CV Apr 8 '13 at 6:25
    
I think this would fail if there were escaped brackets ([) within the JSON. –  Michael Munsey Oct 24 '14 at 21:31
    
@Michael Munsey, It will not fail if the key or value contains [, but the result will not contain [, see s = s.replace("[", "").replace("]", "");. And, I have also mentioned satisfies only with this particular string format. This code should be improved based on @andikurnia's requirement. –  Visruth CV Oct 25 '14 at 5:29
up vote 4 down vote 
public static String[] getStringArray(JSONArray jsonArray){
    String[] stringArray = null;
    int length = jsonArray.lenght();
    if(jsonArray!=null){
        stringArray = new String[length];
        for(int i=0;i<length;i++){
            stringArray[i]= array.optString(i);
        }
    }
    return stringArray;
}
share|improve this answer
1  
Code only answers, while they may be correct, are rarely as informative as ones that also explain why. Consider adding some comments or an explanation to your post. –  indivisible Jun 5 '14 at 9:18
    
Checking if "jsonArray" is null after using it - is wrong as you might get NPE before the check itself. –  android developer Nov 29 '14 at 23:50
up vote 4 down vote 
String jsonString = jsonArray.toString();
jsonString.replace("},{", " ,");
String[]array = jsonString.split(" ");
share|improve this answer
up vote 4 down vote

You can loop to create the String 

List<String> list = new ArrayList<String>();
for (int i=0; i<jsonArray.length(); i++) {
    list.add( jsonArray.getString(i) );
}
String[] stringArray = list.toArray(new String[list.size()]);
share|improve this answer

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