HarmonyOS promptAction.showDialog怎样才能让title标题和message内容居中显示

promptAction.showDialog这种弹出框样式，怎样才能让title标题和message内容居中显示呢？目前的效果是居左显示的

try {
  promptAction.showDialog({
    title: 'showDialog Title Info',
    message: 'Message Info',
    buttons: [
      {
        text: 'button1',
        color: '#000000'
      },
      {
        text: 'button2',
        color: '#000000'
      }
    ]
  }, (err, data) => {
    if (err) {
      console.info('showDialog err: ' + err);
      return;
    }
    console.info('showDialog success callback, click button: ' + data.index);
  });
} catch (error) {
  let message = (error as BusinessError).message
  let code = (error as BusinessError).code
  console.error(`showDialog args error code is ${code}, message is ${message}`);
};