android 显示和隐藏输入法框

val manager = context?.getSystemService(Context.INPUT_METHOD_SERVICE) as InputMethodManager?
manager?.showSoftInput(v, InputMethodManager.SHOW_IMPLICIT)

val manager = context?.getSystemService(Context.INPUT_METHOD_SERVICE) as InputMethodManager?
if (manager?.isActive == true) {
    manager.hideSoftInputFromWindow(
        v.windowToken,
         InputMethodManager.HIDE_NOT_ALWAYS
    )
}