最好的定義onCreateDialog(int) 和onPrepareDialog(int, Dialog) 的方法就是使用一個switch語句來檢查傳入的id. 每個case建立相應的對話方塊. 

FragmentDialog:

1. publicclass LoginDialogFragment extends DialogFragment  
2. {  
3.     @Override
4.     public Dialog onCreateDialog(Bundle savedInstanceState)  
5.     {  
6.         AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());  
7.         // Get the layout inflater
8.         LayoutInflater inflater = getActivity().getLayoutInflater();  
9.         View view = inflater.inflate(R.layout.fragment_login_dialog, null);  
10.         // Inflate and set the layout for the dialog
11.         // Pass null as the parent view because its going in the dialog layout
12.         builder.setView(view)  
13.                 // Add action buttons
14.                 .setPositiveButton("Sign in",  
15.                         new DialogInterface.OnClickListener()  
16.                         {  
17.                             @Override
18.                             publicvoid onClick(DialogInterface dialog, int id)  
19.                             {  
20.                             }  
21.                         }).setNegativeButton("Cancel", null);  
22.         return builder.create();  
23.     }  
24. }  

1. publicvoid showLoginDialog(View view)  
2.     {  
3.         LoginDialogFragment dialog = new LoginDialogFragment();  
4.         dialog.show(getFragmentManager(), "loginDialog");  
5.     }