AndroidStudio與某個網站的連接？

Question

我來自德國對不起我的英語不好。我正在編寫一個Android來控制一個Java項目白色用戶...問題是我的應用程序不想連接到網站。這裏的代碼：

btn.setOnClickListener(new View.OnClickListener() { 
     @Override 
     public void onClick(View v) { 
      try{ 
      String url = "http://192.168.178.56/app/AddUser.php?user=" 
+userb.getText().toString(); 

       BufferedReader f = new BufferedReader(new 
InputStreamReader(new URL(url).openStream())); 
       AlertDialog.Builder ff = new AlertDialog.Builder(context); 
       ff.setMessage(f.readLine()); 
       ff.show(); 
       f.close(); 
      }catch (Exception e){ 
       e.printStackTrace(); 
      } 
     } 
    }); 

Answer 1

試試這個：

 URL url = new URL("http://192.168.178.56/app/AddUser.php?user=" 
+userb.getText().toString()); 
     HttpURLConnection urlConnection = (HttpURLConnection) url.openConnection(); 
     try { 
     InputStream in = new BufferedInputStream(urlConnection.getInputStream()); 
     readStream(in); 
     } finally { 
     urlConnection.disconnect(); 
     }