從Android WebView抓取Post響應

Question

我是使用Java進行Android編程的新手。我想抓取來自網站的帖子回覆，但我該怎麼做？我正在製作類似於我的iOS應用的應用。在iOS中使用迅速我使用這個解決方案Grabbing POST data from UIWebView

我無法找到任何解決方案的Android在網絡上 - 請幫助。謝謝

Answer 1

使用HttpURLConnection獲得POST響應非常簡單。我不確定您的項目是否需要您實際上需要使用WebView來查看網頁本身，但如果您只需發出POST請求並獲取響應，我會在下面發佈一些示例代碼以幫助您開始。

在此代碼中，我將某個JSON作爲POST請求發送到服務器，然後檢索服務器作爲響應發回的JSON。

//Http connections and data streams 
URL url; 
HttpURLConnection httpURLConnection = null; 
OutputStreamWriter outputStreamWriter = null; 

try { 

    //open connection to the server 
     url = new URL("your_url_to_web_service"); 
     httpURLConnection = (HttpURLConnection) url.openConnection(); 

     //set request properties 
     httpURLConnection.setDoOutput(true); //defaults request method to POST 
     httpURLConnection.setDoInput(true); //allow input to this HttpURLConnection 
     httpURLConnection.setRequestProperty("Content-Type", "application/json"); //header params 
     httpURLConnection.setRequestProperty("Accept", "application/json"); //header params 
     httpURLConnection.setFixedLengthStreamingMode(jsonToSend.toString().getBytes().length); //header param "content-length" 

     //open output stream and POST our JSON data to server 
     outputStreamWriter = new OutputStreamWriter(httpURLConnection.getOutputStream()); 
     outputStreamWriter.write(jsonToSend.toString()); 
     outputStreamWriter.flush(); //flush the stream when we're finished writing to make sure all bytes get to their destination 

     //prepare input buffer and get the http response from server 
     StringBuilder stringBuilder = new StringBuilder(); 
     int responseCode = httpURLConnection.getResponseCode(); 

     //Check to make sure we got a valid status response from the server, 
     //then get the server JSON response if we did. 
     if(responseCode == HttpURLConnection.HTTP_OK) { 

      //read in each line of the response to the input buffer 
      BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(httpURLConnection.getInputStream(),"utf-8")); 
      String line; 
      while ((line = bufferedReader.readLine()) != null) { 
       stringBuilder.append(line).append("\n"); 
      } 

      bufferedReader.close(); //close out the input stream 

     try { 
      //Copy the JSON response to a local JSONArray 
      jsonResponse = new JSONArray(stringBuilder.toString()); 
     } catch (JSONException je) { 
      je.printStackTrace(); 
     } 

} catch (IOException ioe) { 
    ioe.printStackTrace(); 
} finally { 
    if(httpURLConnection != null) { 
     httpURLConnection.disconnect(); //close out our http connection 
    } 

    if(outputStreamWriter != null) { 
     try { 
      outputStreamWriter.close(); //close our output stream 
     } catch (IOException ioe) { 
      ioe.printStackTrace(); 
     } 
    } 
} 

//Return the JSON response from the server. 
return jsonResponse;