I have two views with the same elevation beside each other. My wanted behaviour is that they won't cast a shadow over each other as they have the same elevation, however, what is happening is that the view on the left, casts a shadow on the right. They are not the same size so I can't put them both in another view and apply an elevation to that view.
Is this the expected behaviour? Is there a way round it?
Edit:
I just recreated with simpler views, here is the code. I also noticed it has the expected behaviour if I have the view directly in the layout and don't include it as I did it in this example and as I need it to work.
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="horizontal"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
android:paddingBottom="@dimen/activity_vertical_margin"
tools:context=".MainActivity"
android:background="@android:color/holo_green_dark">
<LinearLayout
android:layout_width="200dp"
android:layout_height="200dp"
android:background="@android:color/holo_red_dark"
android:elevation="24dp"/>
<include layout="@layout/test"/>
</LinearLayout>
And here is the include:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="wrap_content"
android:layout_height="wrap_content">
<LinearLayout
android:layout_width="100dp"
android:layout_height="100dp"
android:background="@android:color/holo_red_dark"
android:elevation="24dp"/>
</LinearLayout>
And the screenshot:
See the hierarchy you have:
So you have applied elevation to
1
and3
, which are not siblings. Apparently, if one view is higher in the hierarchy, than it should cast a shadow, regardless those views have same elevation or no.Had you applied elevation to
2
instead of3
you would not see shadow effect.So if you just change your
test.xml
to this:You'd get this output: