Check below code may will help you, Using stroke can make border in edit text and change it's color too as shown below...
<shape xmlns:android="http://schemas.android.com/apk/res/android"
android:padding="10dp"
android:shape="rectangle">
<stroke
android:width="2dp"
android:color="@color/secondary" />
<corners
android:bottomLeftRadius="10dp"
android:bottomRightRadius="10dp"
android:topLeftRadius="10dp"
android:topRightRadius="10dp" />
Add this as background in to edit text. Thanks!