How to use the ShapeableImageView.

README.MD

The Material Components Library introduced with the 1.2.0-alpha03 the new ShapeableImageView.

In your layout you can use:

 <com.google.android.material.imageview.ShapeableImageView
      android:id="@+id/image_view"
      app:srcCompat="@drawable/..." />

Then in your code apply the ShapeAppearanceModel to define your custom corners:

  @ExperimentalImageView
  private void setup() {

    ShapeableImageView imageView = findViewById(R.id.image_view);

    float radius = getResources().getDimension(R.dimen.default_corner_radius);
    imageView.setShapeAppearanceModel(imageView.getShapeAppearanceModel()
        .toBuilder()
        .setTopRightCorner(CornerFamily.ROUNDED,radius)
        .build());

  }

Also you can use the shapeAppearanceOverlay attribute in your layout to define the shape with a style.
For example to achieve a circular image:

 <com.google.android.material.imageview.ShapeableImageView
      android:id="@+id/image_view"
      app:shapeAppearanceOverlay="@style/circleImageView"
      app:srcCompat="@drawable/..." />

with:

  <style name="circleImageView" parent="">
    <item name="cornerFamily">rounded</item>
    <item name="cornerSize">50%</item>
  </style>