Added a Toggle Method

Library/src/com/slidinglayer/SlidingLayer.java

@@ -230,6 +230,24 @@ private void closeLayer(boolean smoothAnim, boolean forceClose) {
     private void switchLayer(boolean open, boolean smoothAnim, boolean forceSwitch) {
         switchLayer(open, smoothAnim, forceSwitch, 0, 0);
     }
+
+    /**
+	 * Simple Toggle Method.
+	 * If layer is open the Layer will close. 
+	 * If the layer is closed it will open.
+	 * It's just that simple.
+	 * @param smoothAnim
+	 * @author adfleshner
+	 */
+    public void toggleLayer(boolean smoothAnim) {
+		if (isOpened()) {
+			closeLayer(smoothAnim, false);
+		} else {
+			openLayer(smoothAnim, false);
+		}
+	}
+
+
 
     private void switchLayer(final boolean open, final boolean smoothAnim, final boolean forceSwitch,
             final int velocityX, final int velocityY) {