Android kotlin多个字符串值进行判空

fun String?.orStr(vararg otherStr: String?): String? {
    var showStr: String? = null
    if (this.isNullOrEmpty()) {
        run outside@{
            otherStr.forEach {
                if (!it.isNullOrEmpty()) {
                    showStr = it
                    return@outside
                }
            }
        }
    } else {
        showStr = this
    }

    return showStr
}

调用方法如下：

fun getShowGroupName(): String? {
    return groupAlias.orStr(groupName, tempName)
}

过程中由groupAlias、groupName、tempName依次判空取值