轉傳:用 ConstraintLayout 解決鍵盤擋住輸入框及按鈕

https://medium.com/joe-tsai/%E7%94%A8-constraintlayout-%E8%A7%A3%E6%B1%BA%E9%8D%B5%E7%9B%A4%E6%93%8B%E4%BD%8F%E8%BC%B8%E5%85%A5%E6%A1%86%E5%8F%8A%E6%8C%89%E9%88%95-642fe2a9b855

這個方法太棒了，想在這做個紀錄