无法解析dimen / detail_backdrop_height

Question

我设法实现了有关CoordinatorLayout，AppBarLayout和CollapsableToolBarLayout的动画。唯一的问题是，根据许多教程的建议，我的AppBarLayout的高度应该是：dimen/detail_backdrop_height但是这个值在我的身上找不到。

摇篮：

compile "com.android.support:appcompat-v7:$SUPPORT_VERSION"
compile "com.android.support:design:$SUPPORT_VERSION"
compile "com.android.support:cardview-v7:$SUPPORT_VERSION"
compile "com.android.support:recyclerview-v7:$SUPPORT_VERSION"
compile "com.android.support:percent:$SUPPORT_VERSION"
compile "com.android.support:support-vector-drawable:$SUPPORT_VERSION"
compile "com.android.support:animated-vector-drawable:$SUPPORT_VERSION"
compile "com.android.support:transition:$SUPPORT_VERSION"

$ SUPPORT_VERSION = 25.0.1