如何刷新片段

Question

我有一個包含片段的活動。有沒有簡單的方法來刷新片段？ 我想過像getFragmentManager().beginTransaction().refresh().commit(); ... 但這裏沒有什麼喜歡刷新。有什麼建議麼？我的片段舉行了一個顯示隨機數的敬酒。我想refreh片段所以敬酒分別顯示了一個新的隨機數從Fragment.onCreateView重做代碼（）

public static class PlaceholderFragment extends Fragment { 

    TextView tv_question; 
    Button btn_answer_1; 
    Button btn_answer_2; 
    Button btn_answer_3; 

    public PlaceholderFragment() { 
    } 

    @Override 
    public View onCreateView(LayoutInflater inflater, ViewGroup container, 
      Bundle savedInstanceState) { 
     View rootView = inflater.inflate(R.layout.fragment_activity_quiz, container, false); 

     Toast.makeText(getActivity(), String.valueOf(Math.random()), Toast.LENGTH_LONG).show(); 

     tv_question = (TextView)rootView.findViewById(R.id.tv_question); 
     SupportFunctions.setViewBackgroundWithDrawable(tv_question, getResources().getDrawable(R.drawable.quiz_question_background)); 

     btn_answer_1 = (Button)rootView.findViewById(R.id.btn_answer_1); 
     btn_answer_2 = (Button)rootView.findViewById(R.id.btn_answer_2); 
     btn_answer_3 = (Button)rootView.findViewById(R.id.btn_answer_3); 
     SupportFunctions.setViewBackgroundWithDrawable(btn_answer_1, getResources().getDrawable(R.drawable.quiz_answer_background)); 
     SupportFunctions.setViewBackgroundWithDrawable(btn_answer_2, getResources().getDrawable(R.drawable.quiz_answer_background)); 
     SupportFunctions.setViewBackgroundWithDrawable(btn_answer_3, getResources().getDrawable(R.drawable.quiz_answer_background)); 
     btn_answer_1.setOnClickListener(btn_answer_listener); 
     btn_answer_2.setOnClickListener(btn_answer_listener); 
     btn_answer_3.setOnClickListener(btn_answer_listener); 

     // LOAD QUESTION FROM DB 

     Globals.setCORRECT_ANSWER(1); 

     // SHUFFLE ANSWERS 

     return rootView; 
    } 

    public OnClickListener btn_answer_listener = new OnClickListener() { 

     @Override 
     public void onClick(View v) { 
      // TODO Auto-generated method stub 

      int id = v.getId(); 

      if (id == R.id.btn_answer_1 && Globals.getCORRECT_ANSWER() == 1) { 
       // correct 
       answerCorrect(); 
      } 
      else if (id == R.id.btn_answer_2 && Globals.getCORRECT_ANSWER() == 2) { 
       // correct 
       answerCorrect(); 
      } 
      else if (id == R.id.btn_answer_3 && Globals.getCORRECT_ANSWER() == 3) { 
       // correct 
       answerCorrect(); 
      } 
      else { 
       answerWrong(); 
      } 

     } 

    }; 

    private void answerCorrect() { 

     Globals.incrementAnswersTotal(); // got to become sharedPreference 
     Globals.incrementAnswersRound(); 
     Globals.incrementCorrectAnswersTotal(); // sharedPreference 
     Globals.incrementCorrectAnswersRound(); 

     AlertDialog.Builder builder = new AlertDialog.Builder(getActivity()); 
     builder.setIcon(getResources().getDrawable(R.drawable.quiz_ic_dialog_correct)); 
     builder.setTitle(getResources().getString(R.string.ad_correct_answer_heading)); 
     builder.setMessage(getResources().getString(R.string.ad_correct_answer_text)); 
     builder.setPositiveButton(R.string.ad_keep_on, new DialogInterface.OnClickListener() { 

      @Override 
      public void onClick(DialogInterface dialog, int which) { 
       // TODO Auto-generated method stub 
       getFragmentManager().beginTransaction().replace(R.id.container, getFragmentManager().findFragmentById(R.id.container)).commit(); 
      } 

     }); 
     builder.setNegativeButton(R.string.ad_to_menu, new DialogInterface.OnClickListener() { 

      @Override 
      public void onClick(DialogInterface dialog, int which) { 
       // TODO Auto-generated method stub 
       startActivity(new Intent(getActivity(), ActivityAppLaunch.class)); 
      } 

     }); 
     builder.setCancelable(false); 


     AlertDialog alert = builder.create(); 
     alert.show(); 

    } 

    private void answerWrong() { 

     Globals.incrementAnswersTotal(); // got to become sharedPreference 
     Globals.incrementAnswersRound(); 

     AlertDialog.Builder builder = new AlertDialog.Builder(getActivity()); 
     builder.setIcon(getResources().getDrawable(R.drawable.quiz_ic_dialog_wrong)); 
     builder.setTitle(getResources().getString(R.string.ad_wrong_answer_heading)); 
     builder.setMessage(getResources().getString(R.string.ad_wrong_answer_text) + "mein Text hier"); 
     builder.setPositiveButton(R.string.ad_keep_on, new DialogInterface.OnClickListener() { 

      @Override 
      public void onClick(DialogInterface dialog, int which) { 
       // TODO Auto-generated method stub 

      } 

     }); 
     builder.setNegativeButton(R.string.ad_to_menu, new DialogInterface.OnClickListener() { 

      @Override 
      public void onClick(DialogInterface dialog, int which) { 
       // TODO Auto-generated method stub 
       startActivity(new Intent(getActivity(), ActivityAppLaunch.class)); 
      } 

     }); 
     builder.setCancelable(false); 

     AlertDialog alert = builder.create(); 
     alert.show(); 

    } 

} 

Answer 1

正如本皮爾森說，而不是把所有的代碼onCreateView（），再拍方法：

public void showNewRandomNumber() { 
    Toast.makeText(getActivity(), String.valueOf(Math.random()), Toast.LENGTH_LONG).show(); 
} 

然後從任何你想要的地方調用它。這聽起來像你想要在positiveButton的onClick方法中調用它，所以這就是它將去的地方（如果是這樣，那麼showNewRandomNumber不必具有公開的可見性）。