Kotlin：使用 startActivityForResult 与同伴一起启动 activity

Question

我正在构建一个倒计时 activity，它需要将剩余时间传回调用 activity（当倒计时仅被部分使用时。）。

class CountDownActivity : AppCompatActivity() {
companion object{
    const val REQUEST_START_COUNTDOWN: Int = 2

    fun CountDownIntent(iToDoRecord: iToDoRecord): Intent {
        return Intent(maincontext, CountDownActivity::class.java).apply {
            putExtra(MainActivity.INTENT_COUNTDOWN_TASK, iToDoRecord.itaskname)
            putExtra(MainActivity.INTENT_CALLING_DATE, MainActivity.currentDate)
            putExtra(MainActivity.INTENT_COUNTDOWN_TIME, iToDoRecord.itaskduration.toLong())
            putExtra(MainActivity.INTENT_COUNTDOWN_TASKID, iToDoRecord.itaskid)
            putExtra(MainActivity.INTENT_COUNTDOWN_TASKMILLI, iToDoRecord.itaskmilliremaining.toLong())
        }
    }
}.....

}

然后我从我的 reclyclerview 中这样调用它：

 val intentitd = Intent(holder.textViewID.getContext(), CountDownActivity.CountDownIntent(currentiToDo)::class.java)
        //intentitd.putExtra(MainActivity.INTENT_CALLING_DATE, currentdate)
        startActivityForResult(CountDownActivity,CountDownActivity.CountDownIntent(currentiToDo),CountDownActivity.REQUEST_START_COUNTDOWN)

编译器给我以下错误： "Type mismatch: inferred type is CountDownActivity.Companion but Activity was expected"

我做错了什么？

Answer 1

您可以尝试将 activity 调用为：

val intent =  CountDownActivity.CountDownIntent(currentiToDo)

startActivityForResult(intent,CountDownActivity.REQUEST_START_COUNTDOWN)

Kotlin：使用 startActivityForResult 与同伴一起启动 activity

Kotlin: Launching activity with companion using startActivityForResult

kotlin

startactivityforresult