Android : Convert List Array to String Array show nothing

Question

I am trying to get the data from URL and convert it into String Array, but when I try to show it on TextView its show nothing. The link and itemId that I use is already right.

There's no Error warning on logcat.

I can't figure it out why. Is there anyone can't help me?

Here's my json data

[{"image":"http://cdn-data.apps.com/category_item/05d92b217f916c9b9d87ab9121662d87.jpg"},
{"image":"http://cdn-data.apps.com/category_item/0424ef5a980255ff989fe5b20eaa5dcd.jpg"},
{"image":"http://cdn-data.apps.com/category_item/02b5bce4a9ca8fa3e53ceea2c7e273ff.jpg"},
{"image":"http://cdn-data.apps.com/category_item/dd15419113c091c93eafb3695eb65153.jpg"},
{"image":"http://cdn-data.apps.com/category_item/1ddfd2d7a489678e3c66e7f012ceb951.jpg"}]

Here's my Java code

    if(in.getStringExtra("TAG_IMAGE_COUNT").equals("0")) {
        ViewPager imagePager = (ViewPager) findViewById(R.id.viewPagerGallery);
        imagePager.setVisibility(View.GONE);
        CirclePageIndicator imageIndicator = (CirclePageIndicator) findViewById(R.id.indicator);
        imageIndicator.setVisibility(View.GONE);
    }
    else {
        ViewPager imagePager = (ViewPager) findViewById(R.id.viewPagerGallery);
        imagePager.setVisibility(View.VISIBLE);
        CirclePageIndicator imageIndicator = (CirclePageIndicator) findViewById(R.id.indicator);
        imageIndicator.setVisibility(View.VISIBLE);

        try {

            DefaultHttpClient defaultClient = new DefaultHttpClient();
            HttpGet httpGetRequest = new HttpGet("http://api.apps.com/category_item/get_image/" + itemId);
            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 arr = new JSONArray(httpResponse);
            List<String> list = new ArrayList<String>();
            for(int i = 0; i < arr.length(); i++){
                list.add(arr.getJSONObject(i).getString("image"));
            }
            String[] stringArr = list.toArray(new String[list.size()]);

            TextView array = (TextView)findViewById(R.id.testarray);

            array.setText(Arrays.toString(stringArr));
            Log.d("", json);

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

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

I try to show it on testarray but its show nothing.

Answer 1

First of all your have to parse a String not Httpresponse:

here you do:

 HttpResponse httpResponse = defaultClient.execute(httpGetRequest);
 JSONArray arr = new JSONArray(httpResponse);

Change a little like:

 HttpResponse httpResponse = defaultClient.execute(httpGetRequest);

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

        while((returnValues = reader .readLine()) != null){
          JSONArray arr = new JSONArray(returnValues);

        //Define this list globally ,so you can use it any where of this class after adding data
        List<String> list = new ArrayList<String>();

        for(int i = 0; i < arr.length(); i++){
            list.add(arr.getJSONObject(i).getString("image"));
        }
      }

And finally set the list data as you want in your textView out of the background thread. you should not use any UI thread views (e.g button, textview, edittext ..) in background thread.

EDIT:

private class GetImages extends AsyncTask<String, Integer, ArrayList<String>>{
   ArrayList<String> list = new ArrayList<String>();
    @Override
    protected ArrayList<String> doInBackground(String... params) {
        try {

        HttpClient defaultClient = new DefaultHttpClient();
        HttpGet httpGetRequest = new HttpGet("http://api.apps.com/category_item/get_image/" + itemId);
        HttpResponse httpResponse = defaultClient.execute(httpGetRequest);

        BufferedReader reader = new BufferedReader(new InputStreamReader(httpResponse.getEntity().getContent()));
        String returnValues = "";

        while((returnValues = reader .readLine()) != null){
          JSONArray arr = new JSONArray(returnValues);

        //Define this list globally ,so you can use it any where of this class after adding data           
        for(int i = 0; i < arr.length(); i++){
            list.add(arr.getJSONObject(i).getString("image"));
        }
      }
    } catch (Exception e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }
        return list;
  }

    @Override
    protected void onPostExecute(ArrayList<String> result) {
        //use this result and put in your textView
    }
}