我是 Android Studio 的新手，我想使用來自 omdb.com 的 API 獲取一些數(shù)據(jù)，這是我的操作方法：我創(chuàng)建了一個(gè)類：package com.example.emad.apidemo;import android.os.AsyncTask;import org.json.JSONArray;import org.json.JSONException;import org.json.JSONObject;import java.io.BufferedReader;import java.io.IOException;import java.io.InputStream;import java.io.InputStreamReader;import java.net.HttpURLConnection;import java.net.MalformedURLException;import java.net.URL;public class fetchData extends AsyncTask<Void,Void,Void> {public String data = "";public String Title ="";@Overrideprotected Void doInBackground(Void... voids) {    try {        URL url = new URL("http://www.omdbapi.com/?t=the+generation&apikey=42ae84fb");        HttpURLConnection httpURLConnection = (HttpURLConnection) url.openConnection();        InputStream inputStream = httpURLConnection.getInputStream();        BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(inputStream));        String line = "";        while(line != null){            line = bufferedReader.readLine();            data = data + line;        }        JSONArray JA = new JSONArray(data);        JSONObject JO = JA.getJSONObject(0);        Title = JO.getString("Title");    } catch (MalformedURLException e) {        e.printStackTrace();    } catch (IOException e) {        e.printStackTrace();    } catch (JSONException e) {        e.printStackTrace();    }    return null;}@Overrideprotected void onPostExecute(Void aVoid) {    super.onPostExecute(aVoid);    MainActivity.txtResponse.setText(this.Title);}}我想Title從以下 JSON 中獲取值：{"Title": "The Generation Game","Year": "1971–2001",}這是我的 mainActivity 代碼：public void btnFetchData_CLick(View v){    fetchData process = new fetchData();    process.execute();}當(dāng)我點(diǎn)擊按鈕時(shí)，沒有任何反應(yīng)！為什么我無法訪問任何值？