Forcing layout to redraw

Question

I made a layout with some views and I need to force redraw it, because I found that invalidate isn't redrawing instantly if I use Thread.sleep().

So, I also found that i can use SurfaceHolder to achieve this, but I don't know how to use it.

If someone can explain me how to use surfaceholder with layout or just another way to force redraw a specific view from the layout.

So, I have some buttons that I change their color programmatically, but the new color is not displayed. Here is how the color is changed:

    while(array[k] < 4) {
        while(!running) {
            Thread.sleep(100);
        }
        array[k] ++;
        Position(k);
        if(Validation(k)) {
            buttons[solution[k].y][solution[k].x].setBackgroundColor(getResources().getColor(R.color.moving));
            buttons[solution[k].y][solution[k].x].forceLayout();
            if(solution[k].x == 0 || solution[k].x == width - 1 || solution[k].y == 0 || solution[k].y == height - 1) {
                DisplaySolution(k);
                Thread.sleep(300);
                ResetMatrix();
            } else {
                Bkt(k + 1);
            }
        } else {
            buttons[solution[k].y][solution[k].x].setBackgroundColor(getResources().getColor(R.color.unpressedEmpty));
        }
    }

I did console log between these and it is executing very well, except that the new color(named "moving") isn't displayed. The ResetMatrix() function resets the colors, but that shouldn't affect this. I also tried with buttons[solution[k].y][solution[k].x].invalidate();, but didn't work.