super.onCreate(savedInstanceState);
GridLayout container = new GridLayout(this);
container.setColumnCount(5);
container.setBackgroundColor(0xFF888888);
final Button []bArray = new Button[icon.length];
for (int i = 0; i < icon.length; i++) {
Button button = new Button(this);
bArray[i] = button;
button.setWidth(200);
button.setBackgroundResource(icon[i]);
container.addView(button);
VectorDrawable vd = (VectorDrawable) button.getBackground();
vd.setAlpha((i + 1) * (0xFF / (icon.length + 1)));
}
setContentView(container);
