android - 从 DialogFragment (DatePicker) 检索和设置数据

Question

我的 DialogFragment 类在我按下 Activity 按钮时被调用。我希望通过此 DialogFragment 设置的日期显示在按钮文本上。 FindViewById 拒绝被类识别。

我找到了一个 similar question但我无法将其与我的情况联系起来。

代码:

1. 调用对话 fragment 的按钮:

   public void datepicker(View v) {
       DialogFragment newFragment = new DatePickerFragment();
       newFragment.show(getFragmentManager(), "datePicker"); 
   }
   

2. 对话 fragment 代码:

   public class DatePickerFragment extends DialogFragment implements
       DatePickerDialog.OnDateSetListener {
   
       @Override
       public Dialog onCreateDialog(Bundle savedInstanceSateate) {
   
           final Calendar c = Calendar.getInstance();
               int year = c.get(Calendar.YEAR);
               int month = c.get(Calendar.MONTH);
               int day = c.get(Calendar.DAY_OF_MONTH);
   
               return new DatePickerDialog(getActivity(), this, year, month, day);
           }
   
           public void onDateSet(DatePicker view, int year, int month, int day) {
               // Do something with the date chosen
           }
       }
   }
   

Answer 1

在您的 DialogFragment 中负责在用户设置日期时收到通知的方法中执行此操作

Button activityButton = (Button)getActivity().findViewById(R.id.myButton);
activityButton.setText (myDate);