Card view doesn't make corner radius-CodePudding

I have dialog fragment and i set my custom view to it. I want to make it with round corners and im using CardView for it, but the shape of dialog is still rectangle. Here is my view:

 <?xml version="1.0" encoding="utf-8"?>
<androidx.cardview.widget.CardView xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_margin="16dp"
    app:cardCornerRadius="40dp">

        <androidx.constraintlayout.widget.ConstraintLayout
            android:id="@ id/card_cl"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:padding="36dp">

            <androidx.appcompat.widget.AppCompatTextView
                android:id="@ id/id_tv"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_marginStart="8dp"
                android:textSize="36sp"
                app:layout_constraintStart_toStartOf="parent"
                app:layout_constraintTop_toTopOf="parent"
                android:text="12" />

        </androidx.constraintlayout.widget.ConstraintLayout>

</androidx.cardview.widget.CardView>

the result :

CodePudding user response：

Try putting your cardview in a linerlayout or a relative layout if it doesn't work try adding some padding to linerlayout or relativelayout.

CodePudding user response：

This is Bcoz The Card color is similar to the background color. You just need to set elevation.