监听系统软键盘的弹起和隐藏事件无结果回调

//软键盘弹起、隐藏事件监听 
private setOnSoftKeyboardListener() { 
  try { 
    inputMethodEngine.getInputMethodAbility().on('keyboardShow', () => { 
      console.log('setOnSoftKeyboardListener InputMethodAbility keyboardShow.'); 
    }); 
    inputMethodEngine.getInputMethodAbility().on('keyboardHide', () => { 
      console.log('setOnSoftKeyboardListener InputMethodAbility keyboardHide.'); 
    }); 
  } catch(err) { 
    console.error(`setOnSoftKeyboardListener Failed to keyboard: ${JSON.stringify(err)}`); 
  } 
}