如何在WebView中禁用复制但启用粘贴？

public class CustomWebViewClient extends WebViewClient {
    @Override
    public boolean shouldOverrideUrlLoading(WebView view, WebResourceRequest request) {
        view.loadUrl(request.getUrl().toString());
        return true;
    }
}

WebView webView = findViewById(R.id.webView);
webView.setWebViewClient(new CustomWebViewClient());

@Override
public void onCreateContextMenu(ContextMenu menu, View v, ContextMenu.ContextMenuInfo menuInfo) {
    super.onCreateContextMenu(menu, v, menuInfo);
    HitTestResult result = webView.getHitTestResult();
    if (result.getType() == HitTestResult.EDIT_TEXT_TYPE) {
        // 移除复制相关的菜单项
        menu.removeItem(android.R.id.copy);
        menu.removeItem(android.R.id.cut);
        menu.removeItem(android.R.id.paste);
    }
}

webView.setOnLongClickListener(new View.OnLongClickListener() {
    @Override
    public boolean onLongClick(View v) {
        // 执行粘贴操作
        ClipboardManager clipboard = (ClipboardManager) getSystemService(Context.CLIPBOARD_SERVICE);
        ClipData clipData = clipboard.getPrimaryClip();
        if (clipData != null && clipData.getItemCount() > 0) {
            CharSequence pasteText = clipData.getItemAt(0).getText();
            if (pasteText != null) {
                // 将粘贴的文本插入到WebView中
                webView.loadUrl("javascript:document.execCommand('insertText', false, '" + pasteText + "');");
                return true;
            }
        }
        return false;
    }
});