?android:attr/actionBarSize not working in only one device. Why?

Question

Android experience level: Novice.

<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:orientation="vertical"
        android:layout_marginTop="?android:attr/actionBarSize"
        android:padding="10dp"
        android:fillViewport="false">

I have applied top margin to the ScrollView which is the height of actionBar . That works well in two of my physical devices properly but not in one. Why the one device does not utilize the value?

Screenshots attached.

Lenovo A7000 with Marshmallow 6.0 Stock ROM:

Below the action bar, one or two lines are not visible. Probably behind the actionBar .

HTC phone and Samsung tablet: The text appears fine.

Answer 1

尝试将属性值更改为？attr / actionBarSize，而不要使用？android：attr / actionBarSize