API 29已弃用PreferenceScreen

Question

我确实创建了首选项XML，然后看到 Context wrapper = new ContextThemeWrapper(context, R.style.PopupMenu); PopupMenu popup = new PopupMenu(wrapper, v); 已被API 29弃用。替代品是什么？

您可以在此处看到折旧消息：

Answer 1

基于Google Document的API级别29中已弃用该标签，并且Google建议您改用AndroidX Preference Library。

您可以在此link

中查看AndroidX首选项指南。

如果from collections import defaultdict ary = [3,2,3,4,7,2,4,7] #you don't need a defaultdict, but I like to use them just in case, instead of a dictionary, as a general practice rank = defaultdict(int) for x in ary: #first, we get all the values of the array and put them in the dict rank[x] = 0 count = 0 for x in sorted(rank): #now we go from lowest to highest in the array, adding 1 to the dict-value rank[x] = count count += 1 ary = [rank[x] for x in ary] print(ary) 之后仍然存在问题，可以使用

Migrate to Androidx

代替

<androidx.preference.PreferenceScreen
    xmlns:android="http://schemas.android.com/apk/res/android">

</androidx.preference.PreferenceScreen>

这不是必需的，但是您也可以将此实现添加到Gradle中。

<PreferenceScreen
    xmlns:app="http://schemas.android.com/apk/res-auto">


</PreferenceScreen>

Answer 2

如official doc中所述：

  

该类已在API级别29中弃用。
  使用AndroidX Preference Library在所有设备上保持一致的行为