DialogFragment UI 在关闭后仍然存在

Question

我有一个自定义对话框片段，我面临的问题是，当调用解除函数时，即使它实际上被解除，对话框 UI 仍然保留在屏幕上。 onDismiss 函数也被调用，但 UI 仍然位于父 Fragment 上。

这是我的对话类

class IAPDialogFragment : DaggerDialogFragment() {
// Listener
var onSuccessfulIAP: (IAPDialogFragment.() -> Unit)? = null

override fun getTheme(): Int = R.style.DialogTheme

override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?): View? =
    inflater.inflate(R.layout.iap_dialog, container, false)

override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
    super.onViewCreated(view, savedInstanceState)
    iap_dialog?.applyOutlineCornerRadius(30)

    setState(state, errorReason)
    action_button.setOnClickListener {
        dismiss()
    }
}

override fun onDismiss(dialog: DialogInterface) {
    super.onDismiss(dialog)
    if (this.state == State.SUCCESS) {
        onSuccessfulIAP?.invoke(this)
    }
}

fun setState(state: State, errorReason: IapException? = null) = apply {
    this.state = state
    this.errorReason = errorReason

    when (state) {
        State.LOADING -> {
            isCancelable = false
            action_button?.visibility = View.GONE
        }
        State.SUCCESS -> {
            isCancelable = true
            action_button?.visibility = View.VISIBLE
            iap_dialog?.setBackgroundResource(R.drawable.iap_card_success_background)
        }
        State.ERROR -> {
            isCancelable = true
            action_button?.visibility = View.VISIBLE
        }
    }
}

这是父片段：

class IAPFragment : DaggerFragment(){
private val dialog = IAPDialogFragment()

override fun onActivityCreated(savedInstanceState: Bundle?) {
    super.onActivityCreated(savedInstanceState)

    billingViewModel.state.observe(viewLifecycleOwner) { state ->
        when (state) {
            State.OFFERS_LOADING -> showLoadingState()
            State.OFFERS_LOADING_FAILED -> showEmptyState()
            State.OFFERS_LOADED -> showOffers(billingViewModel.skuList)
            State.PURCHASING -> dialog.setState(LOADING)
            State.PURCHASING_SUCCESS -> dialog.setState(SUCCESS)
            State.PURCHASING_FAILED -> dialog.setState(ERROR, billingViewModel.errorReason)
            else -> showEmptyState()
        }
    }
}

private fun updateButton(position: Int) {
    subscribe_button.apply {
        setOnClickListener {
            dialog.setState(LOADING)
            dialog.show(childFragmentManager, LOADING.name)
        }
    }
}

我做错了什么吗？ DialogFragment被解除后，有没有办法刷新UI状态？

Answer 1

经过数小时的调查，我终于发现样式中的动画是问题所在。显然，DaggerDialogFragments 与android:windowAnimationStyle 存在兼容性问题。 我使用的风格是：

<style name="DialogTheme" parent="AppTheme">
    <item name="android:windowNoTitle">true</item>
    <item name="android:windowIsFloating">false</item>
    <item name="android:windowIsTranslucent">true</item>
    <item name="android:windowBackground">@android:color/transparent</item>
    <item name="android:windowContentOverlay">@null</item>
    <item name="android:backgroundDimEnabled">false</item>
    <item name="android:windowAnimationStyle">@style/DialogAnimation</item>
</style>

<style name="DialogAnimation">
    <item name="android:windowEnterAnimation">@anim/fragment_fade_enter</item>
    <item name="android:windowExitAnimation">@anim/fragment_fade_exit</item>
</style>

我改成：

<style name="DialogTheme" parent="AppTheme">
    <item name="android:windowNoTitle">true</item>
    <item name="android:windowIsFloating">false</item>
    <item name="android:windowIsTranslucent">true</item>
    <item name="android:windowBackground">@android:color/transparent</item>
    <item name="android:windowContentOverlay">@null</item>
    <item name="android:backgroundDimEnabled">false</item>
    <item name="android:windowEnterAnimation">@anim/fragment_fade_enter</item>
    <item name="android:windowExitAnimation">@anim/fragment_fade_exit</item>
</style>

它神奇地解决了这个问题！