如何從Android應用程序發送HTTP請求到Heroku

Question

我有一個使用twilio sdk並由heroku服務器託管的android應用程序。我試圖在我的應用程序中推送一個按鈕，向heroku發送一個HTTP請求，向Twilio發送一個REST API請求來更新我的twiml URL。目前我試圖發送HTTP請求的方式不起作用。我瀏覽了所有可以找到的示例，但沒有一個展示如何執行此功能。有人知道怎麼做這個嗎？提前致謝。

這是我嘗試發送HTTP請求的Heroku

holdButton.setOnClickListener(new View.OnClickListener() { 


     @Override 
     public void onClick(View view) { 


      HttpClient httpclient = new DefaultHttpClient(); 
      HttpPost httppost = new HttpPost("http://yourappnamehere.herokuapp.com/hello"); 

      try { 
       // Execute HTTP Post Request 
       HttpResponse response = httpclient.execute(httppost); 

       HttpEntity ht = response.getEntity(); 

       BufferedHttpEntity buf = new BufferedHttpEntity(ht); 

       InputStream is = buf.getContent(); 

       BufferedReader r = new BufferedReader(new InputStreamReader(is)); 

       StringBuilder total = new StringBuilder(); 
       String line; 
       while ((line = r.readLine()) != null) { 
        total.append(line); 
       } 

      } catch (ClientProtocolException e) { 
       // TODO Auto-generated catch block 
      } catch (IOException e) { 
       // TODO Auto-generated catch block 
       e.printStackTrace(); 
      } 
      //setting a toast to see if this is being initiated 
      Toast.makeText(getBaseContext(), "why wont it work!", Toast.LENGTH_SHORT).show(); 
     } 

     ; 

    }); 

這是我更新的代碼包括凌空庫

  holdButton.setOnClickListener(new View.OnClickListener() { 


       @Override 
       public void onClick(View view) { 
        //setting up a request queue from Volley API 
        //RequestQueue mRequestQueue; 

    // Instantiate the cache 
        Cache cache = new DiskBasedCache(getCacheDir(), 1024 * 1024); // 1MB cap 

    // Set up the network to use HttpURLConnection as the HTTP client. 
        Network network = new BasicNetwork(new HurlStack()); 

    // Instantiate the RequestQueue with the cache and network. 
        mRequestQueue = new RequestQueue(cache, network); 

    // Start the queue 
        mRequestQueue.start(); 

        String url = "http://yourappnamehere.herokuapp.com/hello"; 

    // Formulate the request and handle the response. 
        StringRequest stringRequest = new StringRequest(Request.Method.POST, url, 
          new Response.Listener<String>() { 
           @Override 
           public void onResponse(String response) { 
            // Do something with the response 
           } 
          }, 
          new Response.ErrorListener() { 
           @Override 
           public void onErrorResponse(VolleyError error) { 
            // Handle error 
           } 
          }); 

        // Add the request to the RequestQueue. 
        mRequestQueue.add(stringRequest); 
        Toast.makeText(getBaseContext(), "why wont it work!", Toast.LENGTH_SHORT).show(); 
    } 

    ; 

    }); 

Answer 1

我會建議使用像谷歌凌空庫代碼非常光滑 https://developer.android.com/training/volley/index.html

HttpRequest已從API級別22棄用。最好避免使用usi那個。改爲使用java.net.HttpUrlConnection。

但是，如果您仍想使用它，上面的代碼需要在上面註釋中提到的UI線程之外的線程上運行。