android-studio - 如何摆脱警告 "cannot resolve symbole ' id/andr '"for ExpandableListView"

Question

一个应用程序使用 ExpandableListActivity ，而ExpandableListView的用法是基于文档的标准:

<ExpandableListView
    android:id="@id/android:list"
    android:layout_width="match_parent"
    android:layout_height="0dip"
    android:layout_weight="1"
    android:divider="@android:color/transparent"
    android:dividerHeight="5dip"
    android:layout_marginTop="10dip">
</ExpandableListView>

Android Studio 3.2 有以下警告:


我怎样才能摆脱警告？

Answer 1

这可能是一个错字。将其更改为:

"@android:id/empty"

和

"@android:id/list"

另见 https://developer.android.com/reference/android/app/ListActivity

ListActivity has a default layout that consists of a single, full-screen list in the center of the screen. However, if you desire, you can customize the screen layout by setting your own view layout with setContentView() in onCreate(). To do this, your own view MUST contain a ListView object with the id "@android:id/list" (or R.id.list if it's in code)