带有哈希图的列表视图

Question

我想在 listview 中显示服务器 json 响应。我在 hashmap 中获取所有值我对如何在自定义 listview 中设置该数据感到困惑。请帮助我并显示代码

class viewticket extends AsyncTask<Void, Void, Void> {

    @Override
    protected void onPreExecute() {
        super.onPreExecute();
        pdialog = new ProgressDialog(UserLogedIn.this);
        pdialog.setMessage("Loading....");
        pdialog.setIndeterminate(false);
        pdialog.setCancelable(false);
        pdialog.show();
    }

    @Override
    protected Void doInBackground(Void... params) {
        List<NameValuePair> param = new ArrayList<NameValuePair>();
        param.add(new BasicNameValuePair("userid", u_id));
        JSONObject jsonArray = jpar.makeHttpRequest(URLMyTicket, "POST", param);
        ServiceHandler sh = new ServiceHandler();

        // Making a request to url and getting response
        String jsonStr = sh.makeServiceCall(URLMyTicket, ServiceHandler.POST, param);
        Log.d("Response: ", "> " + jsonStr);
        if (jsonStr != null) {
            try {

               contacts = new JSONArray(jsonStr);
                int a=contacts.length();
                Log.v(TAG,""+a);
                for (int i = 0; i < contacts.length(); i++) {
                    JSONObject c = contacts.getJSONObject(i);

                    String id = c.getString(TAG_ID);
                    String name = c.getString(TAG_PROB);
                    String email = c.getString(TAG_DESC);
                    HashMap<String, String> contact = new HashMap<String, String>();
                    contact.put(TAG_ID, id);
                    contact.put(TAG_PROB, name);
                    contact.put(TAG_DESC, email);
                    contactList.add(contact);

                }
            } catch (JSONException e) {
                e.printStackTrace();
            }
        } else {
            Log.e("ServiceHandler", "Couldn't get any data from the url");
        }

        return null;
    }
    @Override
    protected void onPostExecute(Void result) {
        super.onPostExecute(result);
        // Dismiss the progress dialog
        if (pDialog.isShowing())
            pDialog.dismiss();

//What code to write

    }

}

onpost 方法和自定义列表类应该写什么

Ticket_list.java

public class Ticket_list extends ArrayAdapter< String> {
HashMap<String, String> objects;
public Ticket_list(Context context, int resource, HashMap<String,String> objects) {
    super(???? //what );

}
   //What



   }

请帮我写onpost方法代码和Ticket_list的代码

Answer 1

我强烈建议您使用 RecyclerView 而不是 ListView 并使用 Retrofit 发送请求并以 json 格式获取响应。请查看这些文档 For RecyclerView。