最后的答案是:

android:inputType="textShortMessage"

新的线路键变成了取出表情键盘的键.唯一的问题是键盘上的换行"键在此配置下消失了(之前您可以长按以在表情符号/换行符之间进行选择，但现在只有表情符号).

The new line key becomes a key to take out the emoji keyboard. The only quibble is the 'new line' key from the keyboard disappears with this configuration (before you could long press to choose between emoji/new line but now it's only emoji).