Hilt ClassCastException：ViewComponentManager$FragmentContextWrapper 无法转换为 AppCompatActivity

Question

我有这段代码，当单击适配器中的 viewHolder 项目时，我会显示对话框片段

 SpecialRequestNotFoundBottomSheetDialog {
            requestItem?.specialRequestEntity?.id?.let { id -> onCancelReasonsSelected(id, it) }
        }.show(itemView.context as AppCompatActivity).supportFragmentManager)

最近我正在迁移到 Hilt，并且遇到类转换异常，看起来 Hilt 包装了上下文，但我无法获取父级 Activity 来获取所需的 FragmentManager 来显示对话框

Answer 1

我阅读源代码找到了这个解决方案

FragmentComponentManager.findActivity(view.context) as Activity

Answer 2

我可以通过检查 Context 类型并获取 BaseContext 找到解决此崩溃的方法。这是我现在正在使用的。不知道用Hilt有没有更好的方法。

private fun activityContext(): Context? {
    val context = itemView.context
    return if (context is ViewComponentManager.FragmentContextWrapper) {
        context.baseContext
    } else context
}

Answer 3

就我而言，我的自定义视图位于库模块中，即：（“com.android.library”），并且我在我的应用程序模块中使用 hilt，即：（“com.android.application”），因为这是我的应用程序正在崩溃。因为我在应用程序模块中使用 Hilt 库，并且上下文实例是由 Hilt 库创建的。我找不到fragmentManger。

因此，作为解决方法，我必须在库模块中添加 Hilt，然后使用下面的代码来查找 FragmentManger

private FragmentManager getFragmentManager(@NonNull Context mContext) {
        if (mContext instanceof AppCompatActivity) {
            return ((AppCompatActivity) mContext).getSupportFragmentManager();
        } else if (mContext instanceof ContextThemeWrapper) {
            return getFragmentManager(((ContextThemeWrapper) mContext).getBaseContext());
        }
// below if clause is for hilt library
 else if (mContext instanceof ViewComponentManager.FragmentContextWrapper) {
            return getFragmentManager(((ViewComponentManager.FragmentContextWrapper) mContext).getBaseContext());
        }
        return null;
    } 

如果是这种情况希望这可以帮助别人。

快乐编码。

Answer 4

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但要避免……

Asking for help, clarification, or responding to other answers.
Making statements based on opinion; back them up with references or personal experience.