EditText.getText弹出窗口对话框

Question

我不知道为什么youtue_title和youtube_description是空的???我添加文本到这个EditText后？我一直这样做，为什么现在不工作？ ??

是否有问题，因为它在popup window？

public void popup_win_with_layout(){ 



    //select video to upload youtube 

    //popup window 

    AlertDialog.Builder popupwin = new AlertDialog.Builder(this); 
    LayoutInflater inflater = this.getLayoutInflater();  

    //try 
    popupwin.setTitle("Y"); 

    popupwin.setIcon(R.drawable.ic_launcher); 

    popupwin.setView(inflater.inflate(R.layout.pop_up_win, null)).setPositiveButton(getString(R.string.Continue), new DialogInterface.OnClickListener() 

    { 

    public void onClick(DialogInterface dialog, int id) 
    { 
    //Action for 'Ok' Button 
     EditText youtue_title; 
     EditText youtube_description; 
     youtue_title=(EditText)findViewById(R.id.youtue_title); //why youtue_title is null ????? 


     youtube_description=(EditText)findViewById(R.id.youtube_description); ////why youtube_description is null ????? 

     video_title = youtue_title.getText().toString(); 
     video_description = youtube_description.getText().toString(); 
     Log.d(TAG, video_title +video_description); 

     PickVideo() ; 

        } 
    }); 



    popupwin.show(); 
} 

Answer 1

替换：

youtue_title=(EditText)findViewById(R.id.youtue_title); 
youtube_description=(EditText)findViewById(R.id.youtube_description); 

有：

youtue_title=(EditText)((AlertDialog)dialog).findViewById(R.id.youtue_title); 
    youtube_description=(EditText)((AlertDialog)dialog).findViewById(R.id.youtube_description);