自定义DialogFragment如何与打开它…

andoid自定义Fragment继承DialogFragment,实现自定义的dialog界面后,如何与打开它的activity或Fragment进行事件的传递？

在自定义的Fragment里定义一个接口,接口里的方法为响应点击事件而定义

public class NoticeDialogFragment extends DialogFragment {
   
   
    publicinterface NoticeDialogListener {
       public void onDialogPositiveClick(DialogFragment dialog);
       public void onDialogNegativeClick(DialogFragment dialog);
    }
   
    // Use thisinstance of the interface to deliver action events
   NoticeDialogListener mListener;
   
    // Overridethe Fragment.onAttach() method to instantiate theNoticeDialogListener
   @Override
    public voidonAttach(Activity activity) {
       super.onAttach(activity);
       // Verify that the host activity implements the callbackinterface
       try {
           // Instantiate the NoticeDialogListener so we can send events tothe host
           mListener = (NoticeDialogListener) activity;
       } catch (ClassCastException e) {
           // The activity doesn't implement the interface, throwexception
           throw new ClassCastException(activity.toString()
                   + " must implement NoticeDialogListener");
       }
    }
     @Override
    publicDialog onCreateDialog(Bundle savedInstanceState) {
       // Build the dialog and set up the button click handlers
       AlertDialog.Builder builder = newAlertDialog.Builder(getActivity());
       builder.setMessage(R.string.dialog_fire_missiles)
              .setPositiveButton(R.string.fire, newDialogInterface.OnClickListener() {
                  public void onClick(DialogInterface dialog, int id) {
                      // Send the positive button event back to the host activity
                      mListener.onDialogPositiveClick(NoticeDialogFragment.this);
                  }
              })
              .setNegativeButton(R.string.cancel, newDialogInterface.OnClickListener() {
                  public void onClick(DialogInterface dialog, int id) {
                      // Send the negative button event back to the host activity
                      mListener.onDialogNegativeClick(NoticeDialogFragment.this);
                  }
              });
       return builder.create();
    }
    ...

}

在打开它的activity或Fragment里实现这个接口

public class MainActivity extends FragmentActivity
                         implements NoticeDialogFragment.NoticeDialogListener{
    ...
   
    public voidshowNoticeDialog() {
       // Create an instance of the dialog fragment and show it
       DialogFragment dialog = new NoticeDialogFragment();
       dialog.show(getSupportFragmentManager(),"NoticeDialogFragment");
    }

    // Thedialog fragment receives a reference to this Activity throughthe
    //Fragment.onAttach() callback, which it uses to call the followingmethods
    // definedby the NoticeDialogFragment.NoticeDialogListener interface
   @Override
    public voidonDialogPositiveClick(DialogFragment dialog) {
       // User touched the dialog's positive button
       ...
    }

   @Override
    public voidonDialogNegativeClick(DialogFragment dialog) {
       // User touched the dialog's negative button
       ...
    }
}