如何将记录列表插入适配器以在 Android Studio 中进行过滤功能?

如何解决如何将记录列表插入适配器以在 Android Studio 中进行过滤功能?

我在通过 ListBooks.java 文件中的适配器解决列表问题时遇到了一些困难。

我所指的问题在同一个文件中的以下行中:

recyclerAdapter = new BookAdapter (list_books);

问题以如下消息的形式出现在这一行:

error: the DonoAdapter constructor in the BookAdapter class cannot be applied to certain types;
required: List <Book>,Context
Found: List <Book>
reason: real and formal argument lists differ in length

可能的错误出现在同一个文件中的 list_books = new ArrayList<>(); 行上我需要在其中插入应用列表中存在的记录 ArrayList<>(),但是我不知道如何解决

  • ListBooks.java
public class ListBooks extends AppCompatActivity {

    RecyclerView recyclerView;
    BookAdapter recyclerAdapter;
    List<Book> list_books;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_listar_livros);
        
        list_books = new ArrayList<>();
        recyclerView = findViewById(R.id.recyclerView);
        recyclerAdapter = new BookAdapter(list_books);
        recyclerView.setAdapter(recyclerAdapter);
        recyclerView.setLayoutManager(new LinearLayoutManager(this));
        recyclerView.setHasFixedSize(true);

        DB db = new DB(this);
        List<Book> books = db.ReadBooks();
        
        if (books.size() > 0){
            BookAdapter bookadapter = new BookAdapter(books,ListBooks.this);
            recyclerView.setAdapter(bookadapter);
        } else {
            Toast.makeText(this,"No books in database.",Toast.LENGTH_SHORT).show();
        }
    }
    
      @Override
      public boolean onCreateOptionsMenu(Menu menu){
          getMenuInflater().inflate(R.menu.search_book,menu);
          MenuItem menuItem = menu.findItem(R.id.s_book);
          SearchView searchView = (SearchView) menuItem.getActionView();
          searchView.setOnQueryTextListener(new SearchView.OnQueryTextListener() {
              @Override
              public boolean onQueryTextSubmit(String query) {
                  return false;
              }
              @Override
              public boolean onQueryTextChange(String newText) {
                  recyclerAdapter.getFilter().filter(newText);
                  return false;
              }
          });
          return super.onCreateOptionsMenu(menu);
      }
}
  • BookAdapter.java
public class BookAdapter extends RecyclerView.Adapter<BookAdapter.ViewHolder> implements Filterable {

    List<Book> books;
    List<Book> books2;
    Context context;
    DB db;

    public BookAdapter(List<Book> books,Context context) {
        this.books = books;
        this.books2 = new ArrayList<>(books);
        this.context = context;
        bd = new BD(context);
    }
    
    @Override
    public Filter getFilter() {
        return filter;
    }
    
    Filter filter = new Filter() {
        @Override
        protected FilterResults performFiltering(CharSequence charSequence) {
            List<Book> filter_books = new ArrayList<>();
            if (charSequence.toString().isEmpty()){
                filter_books.addAll(books2);
            } else {
                for (Book book: books2){
                    if (book.getTitle_book().toLowerCase().contains(charSequence.toString().toLowerCase())){
                        filter_book.add(book);
                    }
                }
            }
            FilterResults filterResults = new FilterResults();
            filterResults.values = filter_books;
            return filterResults;
        }
        @Override
        protected void publishResults(CharSequence constraint,FilterResults filterResults) {
            books.clear();
            books.addAll((Collection<? extends Book>) filterResults.values);
            notifyDataSetChanged();
        }
    };
}

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