Question: So I'm trying to add a small mini map to my android app with a mapbox mapView. I'm trying to add rounded corners to it and I can't seem to find a way to do that. Is there a good way to do this? I know one option is to use a CardView but it doesn't seem to round the corners of the map.

Answer: 
```
<android.support.v7.widget.CardView
    android:layout_width="match_parent"
    android:layout_height="400dp"
    app:cardCornerRadius="12dp"
    app:cardElevation="12dp">

    Put your mapview in here

</android.support.v7.widget.CardView>

```

This card should work perfectly for you.
What are the layout width and height of your Mapbox map in XML?

I followed <https://developer.android.com/guide/topics/ui/layout/cardview> and this XML worked for me

```
<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:mapbox="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent">

<!-- A CardView that contains a TextView -->
<android.support.v7.widget.CardView xmlns:card_view="http://schemas.android.com/apk/res-auto"
    android:id="@+id/card_view"
    android:layout_width="200dp"
    android:layout_height="200dp"
    android:layout_gravity="center"
    android:layout_marginTop="32dp"
    card_view:cardCornerRadius="10dp"
    card_view:layout_constraintEnd_toEndOf="parent"
    card_view:layout_constraintStart_toStartOf="parent"
    card_view:layout_constraintTop_toTopOf="parent">

    <com.mapbox.mapboxsdk.maps.MapView
        android:id="@+id/mapView"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        mapbox:mapbox_cameraTargetLat="40.73581"
        mapbox:mapbox_cameraTargetLng="-73.99155"
        mapbox:mapbox_cameraZoom="11"
        mapbox:mapbox_styleUrl="mapbox://styles/mapbox/streets-v10" />

</android.support.v7.widget.CardView>

</android.support.constraint.ConstraintLayout>

```

[![rounded corner Mapbox MapView](https://i.stack.imgur.com/gE3rt.png)](https://i.stack.imgur.com/gE3rt.png)

[![enter image description here](https://i.stack.imgur.com/fgCoV.png)](https://i.stack.imgur.com/fgCoV.png)