仿今日头条进行点击弹出输入框输入法弹起。按返回键输入框和输入法同时消失。并且监听输入法随输入框消失而消失

Just like the headline of today, click on the pop-up input box and the input method pops up. Press the Back button and the input method disappears at the same time. And the monitor input method disappears as the input box disappears.