CardView background transparent
===

<android.support.v7.widget.CardView
    xmlns:card_view="http://schemas.android.com/apk/res-auto"
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/myCardView"
    android:layout_width="match_parent"
    android:layout_height="match_parent" 
    card_view:cardBackgroundColor="@android:color/transparent"
    card_view:cardElevation="0dp"> 

## Ref.
[Transparent background on CardView - Android](https://stackoverflow.com/questions/28629549/transparent-background-on-cardview-android)

###### tags: `實作相關`