Documents the ImageView.ScaleType attributes

Although the ImageView.ScaleType enum is documented, that
documentation was not reproduced in the xml attributes.  Copying the
documentation across should fill the previously empty 'Description'
column in
http://developer.android.com/reference/android/R.attr.html#scaleType
and
http://developer.android.com/reference/android/widget/ImageView.html#attr_android:scaleType

Also adds javadocs to ImageView.setImageMatrix(Matrix) because the
ScaleType documentation refers to it and it was also empty.

Change-Id: I7768549970eab2ebfe38cc4677a58dc91e104588

1 files changed, 9 insertions, 2 deletions

diff --git a/core/java/android/widget/ImageView.java b/core/java/android/widget/ImageView.java
index 041796b3e008..6d2f3686940d 100644
--- a/core/java/android/widget/ImageView.java
+++ b/core/java/android/widget/ImageView.java
@@ -687,12 +687,19 @@ public class ImageView extends View {
         return mDrawMatrix;
     }
 
+    /**
+     * Adds a transformation {@link Matrix} that is applied
+     * to the view's drawable when it is drawn.  Allows custom scaling,
+     * translation, and perspective distortion.
+     * 
+     * @param matrix the transformation parameters in matrix form
+     */
     public void setImageMatrix(Matrix matrix) {
-        // collaps null and identity to just null
+        // collapse null and identity to just null
         if (matrix != null && matrix.isIdentity()) {
             matrix = null;
         }
-        
+
         // don't invalidate unless we're actually changing our matrix
         if (matrix == null && !mMatrix.isIdentity() ||
                 matrix != null && !mMatrix.equals(matrix)) {