首先创建一个 hideSoftKeyboard() 无效。

public void hideSoftKeyboard() {
    if(getCurrentFocus()!=null) {
        InputMethodManager inputMethodManager = (InputMethodManager) getSystemService(INPUT_METHOD_SERVICE);
        inputMethodManager.hideSoftInputFromWindow(getCurrentFocus().getWindowToken(), 0);
    }
}

然后设置 OnEditorActionListener 到 edittext 打电话给我 hideSoftKeyboard() .

editText.setOnEditorActionListener(new TextView.OnEditorActionListener() {
        @Override
        public boolean onEditorAction(TextView v, int actionId, KeyEvent event) {
            if ((actionId == EditorInfo.IME_ACTION_DONE) || ((event.getKeyCode() == KeyEvent.KEYCODE_ENTER) && (event.getAction() == KeyEvent.ACTION_DOWN ))){
                hideSoftKeyboard();
                return true;
            }
            else{
                return false;
            }
        }
    });

最后，我们将一些xml属性添加到 edittext .

<EditText
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:id="@+id/edittext"
    android:layout_alignParentRight="true"
    android:layout_alignParentEnd="true"
    android:layout_alignParentLeft="true"
    android:layout_alignParentStart="true"
    android:imeOptions="actionDone"
    android:singleLine="true"
    android:lines="1"
    android:inputType="text"/>