Allow colour of content cover to be controlled (#10)

app/src/main/java/uk/co/markormesher/android_fab/app/DemoActivity.java

@@ -251,4 +251,4 @@ protected boolean isEnabled() {
 			return !inClickMode;
 		}
 	}
-}
+}

fab/src/main/java/uk/co/markormesher/android_fab/FloatingActionButton.java

@@ -155,6 +155,16 @@ public void setBackgroundColour(int colour) {
 		}
 	}
 
+	/**
+	 * Sets the colour of the layer that opens behind the speed dial menu.
+	 *
+	 * @param colour the colour of the layer, in aRGB format
+	 */
+	public void setContentCoverColour(int colour) {
+		savedCoverColour = colour;
+		((GradientDrawable) coverView.getBackground()).setColor(colour);
+	}
+
 	/**
 	 * Hide the FAB.
 	 */
@@ -543,14 +553,16 @@ public void onAnimationEnd(Animator animation) {
 	 *====================*/
 
 	private int savedIconResId = -1;
-	private int savedBgColour = 0x3f51b5;
+	private int savedBgColour = 0xff3f51b5;
+	private int savedCoverColour = 0x99ffffff;
 
 	@Override
 	protected Parcelable onSaveInstanceState() {
 		Bundle bundle = new Bundle();
 		bundle.putBoolean("shown", shown);
 		bundle.putInt("savedIconResId", savedIconResId);
 		bundle.putInt("savedBgColour", savedBgColour);
+		bundle.putInt("savedCoverColour", savedCoverColour);
 		bundle.putParcelable("SUPER", super.onSaveInstanceState());
 		return bundle;
 	}
@@ -575,10 +587,15 @@ protected void onRestoreInstanceState(Parcelable state) {
 			// background colour
 			if (bundle.containsKey("savedBgColour")) {
 				savedBgColour = bundle.getInt("savedBgColour");
-				Log.d(C.LOG_TAG, "" + savedBgColour);
 				setBackgroundColour(savedBgColour);
 			}
 
+			// cover colour
+			if (bundle.containsKey("savedCoverColour")) {
+				savedCoverColour = bundle.getInt("savedCoverColour");
+				setContentCoverColour(savedCoverColour);
+			}
+
 			// super-state
 			state = bundle.getParcelable("SUPER");
 		}