Provide a default shadow for the pinned header...

Unfortunately I haven't been able to get the 'shadowDrawable' attribute
working in the dependent project - this was the config...


<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
              xmlns:phl="com.madgag.android.listviews.pinnedheader"
	android:layout_width="fill_parent"
	android:layout_height="fill_parent">

    <com.madgag.android.listviews.pinnedheader.PinnedHeaderLayout
            phl:shadowDrawable="@drawable/black_white_gradient"
		android:layout_width="fill_parent"
		android:layout_height="fill_parent">

res/drawable/shadow.xml

@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="utf-8"?>
+<shape xmlns:android="http://schemas.android.com/apk/res/android" android:shape="rectangle">
+    <gradient
+            android:startColor= "#00ffffff"
+            android:centerColor="#88d3d7cf"
+            android:endColor=   "#ff2e3436"
+            android:angle="90"/>
+</shape>

res/values/attrs.xml

@@ -23,4 +23,3 @@
         <attr name="shadowDrawable" format="reference"/>
     </declare-styleable>
 </resources>
-

src/main/java/com/madgag/android/listviews/pinnedheader/PinnedHeaderLayout.java

@@ -30,9 +30,12 @@
 import android.view.ViewGroup;
 import android.widget.ExpandableListView;
 
+import static com.madgag.android.listviews.pinnedheader.R.drawable.shadow;
+import static com.madgag.android.listviews.pinnedheader.R.styleable.PinnedHeaderLayout_shadowDrawable;
+
 public class PinnedHeaderLayout extends ViewGroup implements PinnedHeaderTrait.HeaderViewGroupAttacher {
 
-    private Drawable shadowDrawable; // getResources().getDrawable(R.drawable.black_white_gradient);
+    private Drawable shadowDrawable;
     private static final String TAG = "PHL";
 
     private PinnedHeaderTrait pinnedHeaderTrait;
@@ -45,7 +48,10 @@ public PinnedHeaderLayout(Context context, AttributeSet attrs) {
         super(context, attrs);
 
         TypedArray typedArray = getContext().obtainStyledAttributes(attrs, R.styleable.PinnedHeaderLayout);
-        shadowDrawable=typedArray.getDrawable(R.styleable.PinnedHeaderLayout_shadowDrawable);
+        shadowDrawable=typedArray.getDrawable(PinnedHeaderLayout_shadowDrawable);
+        if (shadowDrawable==null) {
+            shadowDrawable = getResources().getDrawable(shadow);
+        }
     }
 
     @Override