Quelle  view_permission_icon.xml

<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="60dp"
    android:layout_height="60dp"
    android:padding="5dp"
    android:layout_gravity="center_horizontal"
    xmlns:app="http://schemas.android.com/apk/res-auto">

    <!-- This frame layout is needed for backwards compatibility before api 23 -->
    <FrameLayout
        android:id="@+id/background_frame"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:importantForAccessibility="no">

        <ch.threema.app.ui.SquareImageView
            android:id="@+id/permission_background_view"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:importantForAccessibility="no"
            android:src="@drawable/ic_circle_white"
            android:tint="?attr/colorSurfaceVariant" />

    </FrameLayout>

    <ImageView
        android:id="@+id/permission_icon_view"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_gravity="center"
        android:adjustViewBounds="true"
        android:importantForAccessibility="no"
        android:padding="5dp"
        app:tint="?attr/colorOnSurface" />

</FrameLayout>