Add StateOverlay to RelativeLayout (close Prototik#819)

library/src/org/holoeverywhere/widget/RelativeLayout.java

@@ -0,0 +1,46 @@
+package org.holoeverywhere.widget;
+
+import android.content.Context;
+import android.util.AttributeSet;
+
+import org.holoeverywhere.drawable.DrawableCompat;
+
+public class RelativeLayout extends android.widget.RelativeLayout implements DrawableCompat.IStateOverlay {
+    private final DrawableCompat.StateOverlay mStateOverlay;
+
+    public RelativeLayout(Context context) {
+        this(context, null);
+    }
+
+    public RelativeLayout(Context context, AttributeSet attrs) {
+        this(context, attrs, 0);
+    }
+
+    public RelativeLayout(Context context, AttributeSet attrs, int defStyle) {
+        super(context, attrs, defStyle);
+        mStateOverlay = new DrawableCompat.StateOverlay(this, context, attrs, defStyle);
+    }
+
+    @Override
+    public boolean isActivated() {
+        return mStateOverlay.isActivated();
+    }
+
+    @Override
+    public void setActivated(boolean activated) {
+        mStateOverlay.setActivated(activated);
+    }
+
+    @Override
+    protected int[] onCreateDrawableState(int extraSpace) {
+        if (mStateOverlay == null) {
+            return super.onCreateDrawableState(extraSpace);
+        }
+        return mStateOverlay.onCreateDrawableState(extraSpace);
+    }
+
+    @Override
+    public int[] superOnCreateDrawableState(int extraSpace) {
+        return super.onCreateDrawableState(extraSpace);
+    }
+}