檢索-1從JSON數據爲不明原因

我想打開連接到JSON URL http://www.omdbapi.com/?t=frozen&y=&plot=short&r=json。但我仍然使用下面的代碼爲我的數據檢索-1。我試圖通過使用Log.v來追蹤我出錯的地方，並且我意識到我實際上是從網站檢索-1，並且循環只運行一次。我究竟做錯了什麼？檢索-1從JSON數據爲不明原因

public class GetRawData { 

private String url; 
private String mData; 
private static final String LOG_TAG = "GetRawData"; 

public GetRawData(String url) { 
    this.url = url; 
} 

public void execute() { 
    GetRawDataBackground getRawDataBackground = new GetRawDataBackground(); 
    getRawDataBackground.execute(url); 
} 

public class GetRawDataBackground extends AsyncTask<String, Void, String>{ 

    private StringBuffer stringBuffer; 

    @Override 
    protected String doInBackground(String... params) { 

     mData = processDownloads (params[0]); 

     if (mData == null){ 
      Log.e(LOG_TAG, "Null returned during processing"); 
      return null; 
     } 

     Log.v(LOG_TAG, "Data retrieved from doInBackground : " + mData); 

     return mData; 
    } 

    @Override 
    protected void onPostExecute(String s) { 
     Log.v(LOG_TAG, "Data retrieved is : " + s); 
     super.onPostExecute(s); 
    } 

    private String processDownloads (String mUrl){ 

     HttpURLConnection connection = null; 
     BufferedReader reader = null; 

     try { 
      if (mUrl == null){ 
       return null; 
      } 
      URL url = new URL(mUrl); 
      connection = (HttpURLConnection) url.openConnection(); 
      connection.setRequestMethod("GET"); 
      int responseCode = connection.getResponseCode(); 
      Log.d(LOG_TAG, "Response code is : " + responseCode); 

      reader = new BufferedReader(new InputStreamReader(connection.getInputStream())); 
      stringBuffer = new StringBuffer(); 

      while (reader.readLine() != null){ 
       stringBuffer.append(reader.read()); 
       Log.v(LOG_TAG, "while loop " + stringBuffer.toString()); 
      } 

      Log.v(LOG_TAG, "stringBuffer" + stringBuffer.toString()); 

      return stringBuffer.toString(); 


     } catch (MalformedURLException e) { 
      Log.e(LOG_TAG, "MalformedURLException"); 
      return null; 
     } catch (IOException e){ 
      Log.e(LOG_TAG, "IOException in making connection"); 
      return null; 
     } finally { 
      if (connection != null) { 
       connection.disconnect(); 
      } 
      if (reader != null) { 
       try { 
        reader.close(); 
       } catch (IOException e) { 
        Log.e(LOG_TAG, "Error attempting to close reader"); 
       } 
      } 
     } 


    } 
} 
}

來源

2016-03-13 Jchoi

你得到-1字符串？我沒有看到你的代碼 –

是什麼意思......這就是問題 – Jchoi

當你記錄響應代碼時，你看到200嗎？ –

你的問題是，你忽略了你是從BufferedReader中

讀取線試試這個

StringBuilder sb = new StringBuilder(); 
BufferedReader rd = new BufferedReader(new InputStreamReader(inputStream)); 
String line; 
while ((line = rd.readLine()) != null) { 
    sb.append(line); 
} 
return sb.toString();

來源

2016-03-13 16:27:45

檢索-1從JSON數據爲不明原因

回答

相關問題