@Override
public void onDismiss(DialogInterface dialog)
{
    super.onDismiss(dialog);
    if(mListener != null && limitValue !=null)
    {
        mListener.onDialogDismiss(limitValue);
    }
}

/**
 * 回撥介面入口
*/
public void setListener(OnFragmentInteractionListener listener)
{
    this.mListener 
 
= listener;
}

/**
 * 介面
*/
public interface OnFragmentInteractionListener
{
    void onDialogDismiss(LimitValue limitValue);
}

/**
 * 私有化例項
*/
private OnFragmentInteractionListener mListener;

呼叫的地方建立物件設定監聽，執行相關操作

KvalueDialogFragment dialog2 = new KvalueDialogFragment();
dialog2.setListener(new KvalueDialogFragment.OnFragmentInteractionListener() {
    @Override
 
public void onDialogDismiss(LimitValue limitValue) {
        mTextK.setText(limitValue.getK());
    }
});