java - android 当回车时清除RecyclerView

Question

我试图拥有它，以便当我按回车键时，回收器 View 会从旧数据中清除，并抓取并放入并显示新数据。我拥有它，这样无论何时按下输入键，它都会抓取编辑文本中的内容并将其放入随后搜索的变量中。变量正在更新，但保存搜索项的数组未更新。我需要清除该数组吗？我认为要做到这一点，我需要使用 ArrayList 而不是普通数组。这是一个更好的主意吗？

public View.OnKeyListener search = new View.OnKeyListener()
{
    @Override
    public boolean onKey(View v, int keyCode, KeyEvent event)
    {
        searchItem = "";

        if(event.getAction() == KeyEvent.ACTION_DOWN && keyCode == KeyEvent.KEYCODE_ENTER)
        {
            if(searchItem != searchBar.getText().toString())
            {
                searchItem = searchBar.getText().toString();
                Toast.makeText(imdb_activity.this, "The search is: " + searchItem, Toast.LENGTH_SHORT).show();
                Log.d("Android view component", "Enter button was pressed and the value is: " + searchItem);
            }
            //clear recyclerview?



            goGetSearch();
            return true;
        }
        return false;
    }
};

Answer 1

您需要将更新后的列表传递给recyclerview，我假设goGetSearch是将参数传递给recyclerview的函数，并且searchItem 是您的列表，所以我希望您了解这个概念，如果我的假设是错误的，您可以编辑它以适合您的情况。

    public View.OnKeyListener search = new View.OnKeyListener()
     {
   @Override
   public boolean onKey(View v, int keyCode, KeyEvent event)
     {
    searchItem = "";

    if(event.getAction() == KeyEvent.ACTION_DOWN && keyCode == KeyEvent.KEYCODE_ENTER)
    {
        if(searchItem != searchBar.getText().toString())
        {
            searchItem = searchBar.getText().toString();
            Toast.makeText(imdb_activity.this, "The search is: " + searchItem, 
           Toast.LENGTH_SHORT).show();
            Log.d("Android view component", "Enter button was pressed and the value 
          is: " + searchItem);
        }
        //clear recyclerview?



        goGetSearch(searchItem);
        return true;
    }
    return false;
}
   };