我试图在我的Android应用程序中使用懒惰的图像加载器从服务器加载图像，但它不显示

Question

我正在尝试使用延迟图像加载器在我的Android应用程序中从服务器加载图像，但它不显示。通过JSON访问图像URL并传递给Lazy Loader仍然无法正常工作。请给出建议......

@Override
protected void onCreate(Bundle savedInstanceState) 
{
    super.onCreate(savedInstanceState);
    setContentView(R.layout.category);

     grid=(GridView)findViewById(R.id.gridView1);


        testAsynch mytest= new testAsynch();
        mytest.execute();
      //  adapter=new LazyAdapter(this,imgNames);
       // grid.setAdapter(adapter);
        adapter = new LazyAdapter(this, mylist);
        grid.setAdapter(adapter);
        adapter.notifyDataSetChanged();

}


class testAsynch extends AsyncTask<Void,Integer,String> 
{
    String readFeed;
    JSONObject json;
    StringBuilder builder = new StringBuilder();

    protected void onPreExecute(){

            Log.d("PreExceute","On pre Exceute......");
    }

    protected String doInBackground(Void...arg0) {

        Log.d("DoINBackGround","On doInBackground...");
        StringBuilder builder = new StringBuilder();
        HttpClient client = new DefaultHttpClient();

        // domain intentionally obfuscated for security reasons
        HttpGet httpGet = new HttpGet("http://innobytes.in/webservices/category");
        //HttpGet httpGet = new HttpGet("http://10.0.2.2/pratik/category");
        httpGet.setHeader("content-type", "application/json; charset=UTF-8");
        try 
        {
            HttpResponse response = client.execute(httpGet);
            StatusLine statusLine = response.getStatusLine();
            int statusCode = statusLine.getStatusCode();
            if (statusCode == 200) {
                HttpEntity entity = response.getEntity();
                InputStream content = entity.getContent();
                BufferedReader reader = new BufferedReader(new InputStreamReader(content));
                String line;
                while ((line = reader.readLine()) != null) {
                    builder.append(line);
                }
            } else {
                Log.d("onProgressUpdate","Failed to download file..........");
            }
        } catch (ClientProtocolException e) {
            e.printStackTrace();
        } catch (IOException e){
            e.printStackTrace();
        }
        return builder.toString();

    }




    @SuppressWarnings("null")
    protected void onPostExecute(String result) {
            // NOTE: You can call UI Element here.
        String autcElement = null;
        String img;

        //String url="http://innobytes.in/artsgallery.in/productpic/";


                    try{
                        readFeed = result;


                        JSONArray jsonarray = new JSONArray(readFeed);


                        System.out.println("OKAY_8!!");
                        //*********** Process each JSON Node ***********//*

                        int lengthJsonArr =jsonarray.length();

                        for (int i = 0; i < lengthJsonArr; i++) 
                        {

                            System.out.println("OKAY_9!!");

                            autcElement = jsonarray.toString();
                            //name[i]=autcElement;
                            imgNames.add(autcElement);

                        //  bean.setMediaImageUrl(jsonarray.toString());
                            mylist.add(autcElement);
                        }



                        System.out.print(""+imgNames);

                    }                   
            catch (Exception e) {
                e.printStackTrace();
            }

        // Close progress dialog
    }


 }}