Question

I have an android/java task where I want to get JSON values into a String array to display in a ListView and I am not sure where to begin? Thanks.

private String[] values;
...
// this is what is returned from the web server (Debug view)
// jObj = {"success":1,"0":"Mike","1":"message 1","2":"Fred","3":"message 2","4":"John","5":"message 3"};

try {
   if (jObj.getInt("success") == 1) {
      .
      // what i'm trying to do here is iterate thru JObj and assign values to the 
      // values array to populate the ArrayAdapter so that the ListView displays this:
      //
      // Mike: Message 1
      // Fred: Message 2
      // John: Message 3
      //
      .
      this.setListAdapter(new ArrayAdapter<String>(
         this, android.R.layout.simple_list_item_1, android.R.id.text1, values));
      ListView listView = getListView();
   }
}
catch (JSONException e) {
   Log.e(TAG, e.toString());
}

Answer 1

Use ArrayList instead of Array to add values retrieved from Json Obejct and then set ArrayList for ListView as data-source. change your code as:

 ArrayList<String> array_list_values = new ArrayList<String>();
try {
       if (jObj.getInt("success") == 1) {

        array_list_values.add(jObj.getString("0"));
        array_list_values.add(jObj.getString("1"));
        array_list_values.add(jObj.getString("2"));
        array_list_values.add(jObj.getString("3"));
        array_list_values.add(jObj.getString("4"));
        array_list_values.add(jObj.getString("5"));
        this.setListAdapter(new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, android.R.id.text1, array_list_values));
                ListView listView = getListView();
            }
     }
catch (JSONException e) {
      Log.e(TAG, e.toString());
  }

EDIT :
if number of messages is not always the same it may 1 to a larger number then you can Iterate JsonObject as:

 ArrayList<String> array_list_values = new ArrayList<String>();
try {
       if (jObj.getInt("success") == 1) {

        Iterator iter = jObj.keys();
        while(iter.hasNext()){
        String key = (String)iter.next();
        String value = jObj.getString(key);
        array_list_values.add(value);
        }


        this.setListAdapter(new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, android.R.id.text1, array_list_values));
                ListView listView = getListView();
            }
     }
catch (JSONException e) {
      Log.e(TAG, e.toString());
  }