app/src/main/res/drawable/rectangle.xml

<?xml version="1.0" encoding="UTF-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/listview_background_shape">
    <stroke
        android:width="1dp"
        android:color="@android:color/darker_gray" />
    <padding
        android:bottom="2dp"
        android:left="2dp"
        android:right="2dp"
        android:top="2dp" />
    <solid android:color="#ffffffff" />
</shape>