Button muda de cor

final int[] colors = {Color.parseColor("#008DCD"), Color.parseColor("#FFFF5722")}; // Define as cores que serão alternadas

button.setOnClickListener(new View.OnClickListener() {
    int i = 0;
    @Override
    public void onClick(View v) {
        Button button = (Button) v;
        GradientDrawable gd = new GradientDrawable();
        gd.setCornerRadius(38);
        gd.setColor(colors[i % 2]); // Alterna entre as duas cores definidas
        button.setBackground(gd);
        i++;
    }
});