Cardview shadow not appearing in lollipop devices?

Question

Am using the cardview in my android app. However the shadow is not showing. Here is the xml layout

The default optionsmenu shadow also not showing.

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Answer 1

for someone ,

one other thing that you should be aware of, shadows will not show if you have this line in the manifest:

android:hardwareAccelerated="false"

I tried all of the suggested stuff but it only worked for me when i removed the line, the reason i had the line was because my app works with a number of bitmap images and they were causing the app to crash.