Question

I’ve found several solutions on how to do this through the activity but I’d much rather stick to using xml for layout and graphics.

I want to set an image on a button with rounded edges instead of the plain default corners.

XML SAMPLE:

<ImageView
                android:id="@+id/featuredimage"
                android:layout_width="0dp"
                android:layout_height="fill_parent"
                android:layout_weight="1"
                android:clickable="true"
                android:background="@drawable/rounded"
                android:src="@drawable/budlight_sample"
                android:scaleType="centerCrop" />

ROUNDED.XML

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

    <corners
        android:bottomLeftRadius="10dp"
        android:bottomRightRadius="10dp"
        android:topLeftRadius="10dp"
        android:topRightRadius="10dp" >
    </corners>

</shape>

Answer 1

Use shape drawable for rounded corners , define a rounded.xml in drawable folder of your app.

<shape
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:shape=["rectangle" | "oval" | "line" | "ring"] >
    <corners
        android:radius="integer"
        android:topLeftRadius="integer"
        android:topRightRadius="integer"
        android:bottomLeftRadius="integer"
        android:bottomRightRadius="integer" />
</shape>

ref: http://developer.android.com/guide/topics/resources/drawable-resource.html#Shape

In your layout.xml file use the the rounded.xml as background for your view.

android:background="@drawable/shape"