android.os.networkonmainthreadexception在Android中，ICS

Question

try { 
    URL url = null; 
    url = new URL(url_string); 
    URLConnection conn = url.openConnection(); 
    BufferedReader reader = new BufferedReader(new InputStreamReader(conn.getInputStream())); 
    String line=""; 
    while((line = reader.readLine())!=null){ 
     Log.d("html",line); 
    } 

} catch (Exception e) { 
    Log.d("Exception Error: ",e.toString()); 
} 

---

我只是閱讀的網站，我得到的錯誤與android.os.networkonmainthreadexception

我的代碼很簡單..請看看，請告訴我，我需要做的..

感謝，

Answer 1

您需要訪問您的網絡移動到後臺線程，如通過AsyncTask。您目前正嘗試在主應用程序線程上執行網絡I/O，這是而不是的一個好主意。

Answer 2

使用這個類來運行後臺任務..

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


      @Override 
      protected void onPreExecute() 
      { 
       super.onPreExecute(); 
       Utils.clearDialogs(); 
       Utils.showActivityViewer(Mainctivity.this); 
      } 

      @Override 
      protected Void doInBackground(String... arg0) 
      { 

      try 
      { 

       URL url = null; 
url = new URL(url_string); 
URLConnection conn = url.openConnection(); 
BufferedReader reader = new BufferedReader(new InputStreamReader(conn.getInputStream())); 
String line=""; 
while((line = reader.readLine())!=null){ 
    Log.d("html",line); 
      } 
      catch (Exception e) 
      { 
      e.printStackTrace(); 
      } 

      return null; 
      } 

      @Override 
      protected void onPostExecute(Void result) 
      { 
       super.onPostExecute(result); 
       Utils.hideActivityViewer(); 

      } 
      catch (Exception e) 
      { 
      Log.v("log", e.toString()); 
      } 
      } 

      }