即使在关闭活动之后仍然以编程方式保存cardview(Saving a cardview programmatically even after closing the activity)

 我对android非常陌生 ，我试图通过编程来制作CardView ，我正在使用Fragment 。 通过在按钮上设置OnClick ，我可以在布局中创建卡片。 问题是关闭活动卡后没有显示。 
 
 我怎样才能保存这些卡片，关闭活动卡片后应该在那里？ 
 
public void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  getActivity().setTitle("Okhlee");
}

@Nullable
@Override
public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
  view = inflater.inflate(R.layout.hawker_jobs_fragment_layout, container, false);
  context = getContext();
  button = (Button) view.findViewById(R.id.hawker_job_add_card_view_button);
  button.setOnClickListener(this);
  relativeLayout = (RelativeLayout) view.findViewById(R.id.hawker_job_relative_layout);

  return view;
}

@Override
public void onClick(View v) {
  createCardView();
}

/*Adding cardview programmatically function */
private void createCardView() {
  CardView addedCardView = new CardView(context);
  layoutParams = new LayoutParams(LayoutParams.WRAP_CONTENT, height);
  addedCardView.setLayoutParams(layoutParams);
  addedCardView.setPadding(10 ,10, 10, 10);
  addedCardView.setRadius(15);
  addedCardView.setCardBackgroundColor(Color.BLUE);
  addedCardView.setMaxCardElevation(30);
  addedCardView.setMaxCardElevation(6);

  relativeLayout.addView(addedCardView);
}
 
 对不起，我的英语不好。 

I am very new to android and I am trying to make CardView by programmatically, I am using Fragment. By setting an OnClick on the button I am able to create cards in my layout. The issue is after closing the activity cards are not showing.
 
How can I save the cards, so after closing the activity cards should be there? 
 
public void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  getActivity().setTitle("Okhlee");
}

@Nullable
@Override
public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
  view = inflater.inflate(R.layout.hawker_jobs_fragment_layout, container, false);
  context = getContext();
  button = (Button) view.findViewById(R.id.hawker_job_add_card_view_button);
  button.setOnClickListener(this);
  relativeLayout = (RelativeLayout) view.findViewById(R.id.hawker_job_relative_layout);

  return view;
}

@Override
public void onClick(View v) {
  createCardView();
}

/*Adding cardview programmatically function */
private void createCardView() {
  CardView addedCardView = new CardView(context);
  layoutParams = new LayoutParams(LayoutParams.WRAP_CONTENT, height);
  addedCardView.setLayoutParams(layoutParams);
  addedCardView.setPadding(10 ,10, 10, 10);
  addedCardView.setRadius(15);
  addedCardView.setCardBackgroundColor(Color.BLUE);
  addedCardView.setMaxCardElevation(30);
  addedCardView.setMaxCardElevation(6);

  relativeLayout.addView(addedCardView);
}
 
Sorry for my bad English.

原文：https://stackoverflow.com/questions/39763804