在 ActivityResultContract 中获取请求代码的默认方式

如何解决在 ActivityResultContract 中获取请求代码的默认方式

是否有任何默认方式可以在 ActivityResultContract 中获取请求代码？

我知道返回 StartActivityForResult 的 ActivityResult 合约，但没有 requestCode，只有 resultCode。

我可以这样做，但也许有更好的解决方案：

class StartActivityForResult : ActivityResultContract<ActivityInput,ActivityOutput?>() {
    override fun createIntent(
        context: Context,input: ActivityInput
    ): Intent {
        return input.data.apply { putExtra(requestCodeKey,input.requestCode) }
    }

    override fun parseResult(resultCode: Int,intent: Intent?): ActivityOutput? {
        return if (intent == null || resultCode != Activity.RESULT_OK) null
        else ActivityOutput(
            // should never return default value
            requestCode = intent.getIntExtra(requestCodeKey,-1),resultCode = resultCode,data = intent
        )
    }

    override fun getSynchronousResult(
        context: Context,input: ActivityInput?
    ): SynchronousResult<ActivityOutput?>? {
        return if (input == null) SynchronousResult(null) else null
    }

    companion object {
        const val requestCodeKey = "requestCodeKey";
    }
}

data class ActivityInput(val requestCode: Int,val data: Intent)

data class ActivityOutput(val requestCode: Int,val resultCode: Int,val data: Intent
)