mihon/app/src/main/res/drawable/library_item_selector.xml

<?xml version="1.0" encoding="utf-8"?>
<ripple xmlns:android="http://schemas.android.com/apk/res/android"
    android:color="?attr/colorLibrarySelection">
    <item>
        <selector>
            <item
                android:state_selected="true"
                android:top="2dp"
                android:right="2dp"
                android:bottom="2dp"
                android:left="2dp">
                <shape android:shape="rectangle">
                    <corners android:radius="@dimen/card_radius" />
                    <solid android:color="?attr/colorLibrarySelectionActive" />
                </shape>
            </item>

            <item
                android:state_activated="true"
                android:top="2dp"
                android:right="2dp"
                android:bottom="2dp"
                android:left="2dp">
                <shape android:shape="rectangle">
                    <corners android:radius="@dimen/card_radius" />
                    <solid android:color="?attr/colorLibrarySelectionActive" />
                </shape>
            </item>

            <item
                android:top="2dp"
                android:right="2dp"
                android:bottom="2dp"
                android:left="2dp">
                <shape android:shape="rectangle">
                    <corners android:radius="@dimen/card_radius" />
                    <solid android:color="?android:attr/colorBackground" />
                </shape>
            </item>
        </selector>
    </item>
</ripple>