How to create a button with border and transparent background android

you should create a shape in a xml file like below, and set it as your button background

 <shape xmlns:android="http://schemas.android.com/apk/res/android"
        android:shape="rectangle"
        >
        <solid android:color="@android:color/transparent" />

        <stroke
            android:width="2dp"
            android:color="@color/your_border_color" />
    </shape>