Question

我有多个不同标题和内容的cardView。我想在按下按钮时仅复制内容。这是适配器类中的ViewHolder。

   TextView title;
                TextView content;
                Button copyButton;
                public ViewHolder(View itemView) {
                    super(itemView);
                    this.title = (TextView)itemView.findViewById(R.id.card_title);
                    this.content = (TextView)itemView.findViewById(R.id.card_content);
                    this.copyButton= (Button)itemView.findViewById(R.id.copyButton);

并在onBindViewHolder buttonClickListener中我这样做了：

 holder.copyButton.setOnClickListener(new View.OnClickListener(){
            public void onClick(View v){


                myClipboard = (ClipboardManager) v.getContext().getSystemService(Context.CLIPBOARD_SERVICE);

                myClip = ClipData.newPlainText("text",v.content.getText().toString() );
                myClipboard.setPrimaryClip(myClip);
                Toast.makeText(v.getContext(), "Copied to clipboard" , Toast.LENGTH_SHORT ).show();

            }
        });

但它不接受这个'v.content.getText（）。toString（）'我该怎么办？

Answer 1

View v是对按钮的引用，而不是TextView的标题和内容。你需要做这样的事情来获取你在onClick方法中寻找的文本：

string title = ViewHolder.this.title.getText();
string content = ViewHolder.this.content.getText();

holder.copyButton.setOnClickListener(new View.OnClickListener() {
    public void onClick(View v) {
        // v is equal to copyButton, not an instance of ViewHolder
        // v.content doesn't exist because the copyButton doesn't have a content property

        // ViewHolder.this is equal to holder and contains the TextView content which you are trying to get the text from 

        string content = ViewHolder.this.content.getText().toString();
    }
}

将cardView的内容复制到剪贴板

1 个答案: