제목그대로  로그인 화면을 구현하고있습니다... Restful 과  파싱은 로그로 제대로 확인을 하였는데...
문제는 실패할때와 성공할때의  동작이 제대로 작동하지 않습니다 ㅠ ㅠ.....  코드는 이렇습니다.. URL은 대강 가려놨습니다.
도와주십시오 T.T
 @Click({R.id.join, R.id.login, R.id.forget})
 void click(View v){
  switch (v.getId()) {
  case R.id.join:
   startActivity(new Intent(getApplicationContext(), JoinFormActivity_.class));
   break;
  case R.id.login:
   new AttemptLogin().execute();
           
   break;
  case R.id.forget:
   startActivity(new Intent(getApplicationContext(), ForgetUserActivity_.class));
 
   break;
  }
  
 }
 class AttemptLogin extends AsyncTask<String, String, String> {
   /**
      * Before starting background thread Show Progress Dialog
      * */
  boolean failure = false;
  
     @Override
     protected void onPreExecute() {
         super.onPreExecute();
         pDialog = new ProgressDialog(MainActivity.this);
         pDialog.setMessage("Attempting login...");
         pDialog.setIndeterminate(false);
         pDialog.setCancelable(true);
         pDialog.show();
   long delayInMillis = 4000;
      Timer timer = new Timer();
      timer.schedule(new TimerTask() {
     }
  
 @Override
  protected String doInBackground(String... args) {
   // TODO Auto-generated method stub
    // Check for success tag
         int success;
          account = new Account();
          String userId = id.getText().toString();
   String userPw = pw.getText().toString();
      
   jin.login(userId, userPw);  
   
         try {
             // Building Parameters
             List<NameValuePair> params = new ArrayList<NameValuePair>();
             params.add(new BasicNameValuePair("id", userId));
             params.add(new BasicNameValuePair("pw", userPw));
             Log.d("request!", "starting");
             // getting product details by making HTTP request
             JSONObject json = jsonParser.makeHttpRequest(
                    LOGIN_URL, "POST", params);
             // check your log for json response
             Log.d("Login attempt", json.toString());
             // json success tag
             success = json.getInt(TAG_SUCCESS);
             if (success == 1) {
              Log.d("Login Successful!", json.toString());
              Intent i = new Intent(MainActivity.this, ControlActivity_.class);
              finish();
                // 데이터를저장합니다. (ID, Password)
                SharedPreferences prefs = getSharedPreferences("PrefName", MODE_PRIVATE);
                SharedPreferences.Editor editor = prefs.edit();
                editor.putString("userId", userId);
                editor.putString("userPw", userPw);
                editor.commit();
     startActivity(i);
              return json.getString(TAG_MESSAGE);
             }else{
              Log.d("Login Failure!", json.getString(TAG_MESSAGE));
              return json.getString(TAG_MESSAGE);
              
             }
         } catch (JSONException e) {
             e.printStackTrace();
         }
         return null;
   
  }
  /**
      * After completing background task Dismiss the progress dialog
      * **/
    protected void onPostExecute(String file_url) {
        // dismiss the dialog once product deleted
        pDialog.dismiss();
        if (file_url != null){
         Toast.makeText(MainActivity.this, file_url, Toast.LENGTH_LONG).show();
        }
     }
 }
}