Transparent background on CardView - Android

Setup your CardView to use the cardBackgroundColor attribute to remove color and cardElevation attribute to remove the drop shadow. For example:

<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"> 

For a full list of supported attributes see here: https://developer.android.com/reference/android/support/v7/widget/CardView.html

If you are using an older API, you will need to call these two functions on your CardView instead:

myCardView.setCardBackgroundColor(Color.TRANSPARENT);myCardView.setCardElevation(0);

in SDK version 21 or higher steps to make Android CardView transparent.

1. Set android:backgroundTint="@android:color/transparent". This is CardView attribute to set background.

2. Set android:cardElevation="0dp" to remove the shadow.

For example, here is small xml code to create transparent CardView

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

In my case, I used the attribute android:backgroundTint="@color/some_color",it is only used en API level 21 and higher. And color #50000000 for example.

<android.support.v7.widget.CardView        android:layout_width="wrap_content"        android:layout_height="wrap_content"        card_view:cardCornerRadius="3dp"        app:cardElevation="0dp"        android:backgroundTint="@color/negro_label"        >