鸿蒙HarmonyOS剪切板的如何实现

/**
 * 功能描述：复制文本到剪切板
 */
private void copyText() {
  pasteboard = SystemPasteboard.getSystemPasteboard(this);
  PasteData pasteData = new PasteData();
  pasteData.addTextRecord("copyText");
  PacMap pacMap = new PacMap();
  pacMap.putString("ADDITION_KEY", "ADDITION_VALUE_OF_TEXT");
  pasteData.getProperty().setAdditions(pacMap);
  pasteData.getProperty().setTag("USER_TAG");
  pasteData.getProperty().setLocalOnly(true);
  pasteboard.setPasteData(pasteData);
  pasteData = null;
  showText.setText("copyText success");
}

/**
 * 功能描述：监听剪贴板
 */
private void processMonitor() {
  IPasteDataChangedListener listener = new IPasteDataChangedListener() {
    @Override
    public void onChanged() {
      showText.setText("in onChanged ");
      PasteData pasteData = pasteboard.getPasteData();
      if (pasteData == null) {
        return;
      }
      showPasteText ();
      // Operations to handle data change on the system pasteboard
    }
  };
  pasteboard.addPasteDataChangedListener(listener);
}

/**
 * 功能描述：从剪切板中粘贴文字
 */
private void showPasteText() {
  pasteboard = SystemPasteboard.getSystemPasteboard(this);
  pasteData = pasteboard.getPasteData();
  record = pasteData.getRecordAt(0);
  showText.append(record.getPlainText().toString());
  showText.append(record.getMimeType());
  showText.append(pasteData.getProperty().getTag().toString());
  PacMap pacMap = pasteData.getProperty().getAdditions();
  String extraInfo = pacMap.getString("ADDITION_KEY");
  if (extraInfo == null || extraInfo.isEmpty()) {
    LogUtil.error(TAG, "extra info is null or is empty");
  } else {
    showText.append(pacMap.getString("ADDITION_KEY"));
  }
}

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