round_button_2.xml

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
    android:shape="rectangle">

    <solid android:color="@color/white"/>

    <corners android:radius="360dip"/>

    <stroke android:width="1dp" android:color="@color/colorGray7"/>

</shape>