如何在recyclerview android中的single_row_item的每个视图（imageView，textView）上添加不同的点击事件？

Posted 2023-04-19

【中文标题】如何在recyclerview android中的single_row_item的每个视图（imageView，textView）上添加不同的点击事件？

【英文标题】：how to add different click events on each view (imageView, textView) of single_row_item in a recyclerview android?

【发布时间】：2021-10-07 05:28:11

【问题描述】：

here are my recyclerview and viewholder classes

 public class BookAdapter extends RecyclerView.Adapter<BookAdapter.MyViewHolder>  
    private ArrayList<Book> bookList;
    private OnItemClickListener itemClickListener;

    public BookAdapter( ArrayList<Book> bookList, OnItemClickListener itemClickListener) 
        this.bookList = bookList;
        this.itemClickListener = itemClickListener;
    
    @Override
    public BookAdapter.MyViewHolder onCreateViewHolder( ViewGroup parent, int viewType) 
        View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.row_list_item,parent,false);
        return new MyViewHolder(view);
    
    @Override
    public void onBindViewHolder( BookAdapter.MyViewHolder holder, int position) 
        Book book = bookList.get(position);
        holder.book_imageview.setImageResource(book.getBookImageId());
        holder.title_textview.setText(book.getBookTitle());
        holder.author_textview.setText(book.getBookAuthor());
    
    @Override
    public int getItemCount() 
        return bookList.size();
    


    public class MyViewHolder extends RecyclerView.ViewHolder 
        ImageView book_imageview;
        TextView author_textview, title_textview;
        public MyViewHolder(View itemView) 
            super(itemView);

            book_imageview = itemView.findViewById(R.id.book_imageview);
            author_textview = itemView.findViewById(R.id.author_textview);
            title_textview = itemView.findViewById(R.id.title_textview);
            // if i clcik on title then in toast title should only be displayed
            // if i click on auther then in toast auther should only be displayed
            switch (getAbsoluteAdapterPosition())
                case R.id.title_textview:
                    title_textview.setOnClickListener(v ->itemClickListener.onClick(bookList.get(getLayoutPosition())));
                         break;
                case R.id.author_textview:
                    author_textview.setOnClickListener(v ->itemClickListener.onClick(bookList.get(getLayoutPosition())));
            
        
    

我想问我如何在 itemView 的每个组件上添加点击列表器，例如 title_textview、author_textview 等，因为我无法在我的界面的实现方法中创建 switch 语句

这是我的主要活动我认为的主要问题在哪里。我想使用 Switch 语句通过单独单击 ROW-ITEM 的组件来获取单个结果

public class MainActivity extends AppCompatActivity  implements OnItemClickListener
    private ArrayList<Book> bookList;
    private RecyclerView rv;

    @Override
    protected void onCreate(Bundle savedInstanceState) 
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        bookList = new ArrayList<>();
        Resources res = getResources();
        String[] allBooks = res.getStringArray(R.array.books);
        String[] allAuthors = res.getStringArray(R.array.authors);

        pupoluateBookList(allBooks, allAuthors);

        BookAdapter adapter = new BookAdapter(bookList, this);

                rv = findViewById(R.id.rv);
        LinearLayoutManager linearLayoutManager = new LinearLayoutManager(this);
        rv.setLayoutManager(linearLayoutManager);
        rv.setAdapter(adapter);
    

    private  void showToast(String message)
        Toast.makeText(this,message,Toast.LENGTH_LONG).show();
    

    public void pupoluateBookList(String[] books, String[] authors) 

        bookList.add(new Book(books[0], authors[0], R.drawable.davinci_code));
        bookList.add(new Book(books[1], authors[1], R.drawable.girl_train));
        bookList.add(new Book(books[2], authors[2], R.drawable.harry_potter));
        bookList.add(new Book(books[3], authors[3], R.drawable.hunder_games));
        bookList.add(new Book(books[4], authors[4], R.drawable.lord_rings));
        bookList.add(new Book(books[5], authors[5], R.drawable.moby_dick));
        bookList.add(new Book(books[6], authors[6], R.drawable.mocking_bird));
        bookList.add(new Book(books[7], authors[7], R.drawable.the_godfather));
    

    @Override
    public void onClick( Book book) 
// here I want to use switch statment for clicking individual components and taking result respectively

        showToast(book.getBookTitle());
        showToast(book.getBookAuthor());
    

【问题讨论】：

这能回答你的问题吗？ Multiple onClickListener in a RecyclerView

【参考方案1】：

你有错误的逻辑。

您需要像这样更改点击监听器实现：

将这两行放在开关盒之前。

title_textview.setOnClickListener(this);
author_textview.setOnClickListener(this);

在您的 ViewHolder 类中实现 View.OnClickListener，然后覆盖 onClick() 并像这样更改您的开关盒。

@Override
public void onClick(View view)

 switch (view.getId()) 
   case R.id.title_textview:
     String bookTitle = bookList.get(getAdapterPosition()).getBookTitle();
     showToast(bookTitle);
     break;
   
   case R.id.author_textview:
     String bookAuthor = bookList.get(getAdapterPosition()).getBookAuthor();
     showToast(bookAuthor);
     break;
   

是的，如果您不处理布局更改，则应该使用getAdapterPosition()，因为大多数时候最好只使用与数据相关的东西。

【讨论】：

谢谢它真的很有帮助

很高兴它有帮助:)