can not display color wheel in viewpager

[hangox]

when I use it is fragment with viewpager. I found it can not display color wheel.Because It does not callback onWindowFocusChanged，so , can not create wheel bitmap.I fix it by this

@Override
    protected void onSizeChanged(int w, int h, int oldw, int oldh) {
        super.onSizeChanged(w, h, oldw, oldh);
        updateColorWheel();
    }

[QuadFlask]

Thank you! I will add your code.