gistfile1.java

	@Override
	protected void onLayout(boolean changed, int l, int t, int r, int b) {
		final int width = r - l;
		final int height = b - t;

		final int bigImageViewHeight = Math.round(0.4f * height);
		layoutChild(bigImageView,
			Math.round(0.1f * width),
			0,
			Math.round(0.8f * width),
			bigImageViewHeight);

		final int bigImageViewCenterVertical = bigImageViewHeight / 2;
		final int smallImageViewHeight = smallImageView.getMeasuredHeight(); // for example
		layoutChild(smallImageView,
			Math.round(0.3f * width),
			bigImageViewCenterVertical - smallImageViewHeight / 2,
			Math.round(0.4f * width),
			smallImageViewHeight);
		
		// etc
	}

	private static void layoutChild(View view, int left, int top, int width, int height) {
		view.layout(left, top, left + width, top + height);
	}